aoqi@0: /*
aoqi@0:  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.  Oracle designates this
aoqi@0:  * particular file as subject to the "Classpath" exception as provided
aoqi@0:  * by Oracle in the LICENSE file that accompanied this code.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: package com.sun.xml.internal.messaging.saaj.util;
aoqi@0: 
aoqi@0: // Imported from: org.apache.xerces.util
aoqi@0: // Needed to work around differences in JDK1.2 and 1.3 and deal with userInfo
aoqi@0: 
aoqi@0: import java.io.IOException;
aoqi@0: import java.io.Serializable;
aoqi@0: 
aoqi@0: 
aoqi@0: /**********************************************************************
aoqi@0: * A class to represent a Uniform Resource Identifier (URI). This class
aoqi@0: * is designed to handle the parsing of URIs and provide access to
aoqi@0: * the various components (scheme, host, port, userinfo, path, query
aoqi@0: * string and fragment) that may constitute a URI.
aoqi@0: * <p>
aoqi@0: * Parsing of a URI specification is done according to the URI
aoqi@0: * syntax described in RFC 2396
aoqi@0: * <http://www.ietf.org/rfc/rfc2396.txt?number=2396>. Every URI consists
aoqi@0: * of a scheme, followed by a colon (':'), followed by a scheme-specific
aoqi@0: * part. For URIs that follow the "generic URI" syntax, the scheme-
aoqi@0: * specific part begins with two slashes ("//") and may be followed
aoqi@0: * by an authority segment (comprised of user information, host, and
aoqi@0: * port), path segment, query segment and fragment. Note that RFC 2396
aoqi@0: * no longer specifies the use of the parameters segment and excludes
aoqi@0: * the "user:password" syntax as part of the authority segment. If
aoqi@0: * "user:password" appears in a URI, the entire user/password string
aoqi@0: * is stored as userinfo.
aoqi@0: * <p>
aoqi@0: * For URIs that do not follow the "generic URI" syntax (e.g. mailto),
aoqi@0: * the entire scheme-specific part is treated as the "path" portion
aoqi@0: * of the URI.
aoqi@0: * <p>
aoqi@0: * Note that, unlike the java.net.URL class, this class does not provide
aoqi@0: * any built-in network access functionality nor does it provide any
aoqi@0: * scheme-specific functionality (for example, it does not know a
aoqi@0: * default port for a specific scheme). Rather, it only knows the
aoqi@0: * grammar and basic set of operations that can be applied to a URI.
aoqi@0: *
aoqi@0: * @version
aoqi@0: *
aoqi@0: **********************************************************************/
aoqi@0:  public class JaxmURI implements Serializable {
aoqi@0: 
aoqi@0:   /*******************************************************************
aoqi@0:   * MalformedURIExceptions are thrown in the process of building a URI
aoqi@0:   * or setting fields on a URI when an operation would result in an
aoqi@0:   * invalid URI specification.
aoqi@0:   *
aoqi@0:   ********************************************************************/
aoqi@0:   public static class MalformedURIException extends IOException {
aoqi@0: 
aoqi@0:    /******************************************************************
aoqi@0:     * Constructs a <code>MalformedURIException</code> with no specified
aoqi@0:     * detail message.
aoqi@0:     ******************************************************************/
aoqi@0:     public MalformedURIException() {
aoqi@0:       super();
aoqi@0:     }
aoqi@0: 
aoqi@0:     /*****************************************************************
aoqi@0:     * Constructs a <code>MalformedURIException</code> with the
aoqi@0:     * specified detail message.
aoqi@0:     *
aoqi@0:     * @param p_msg the detail message.
aoqi@0:     ******************************************************************/
aoqi@0:     public MalformedURIException(String p_msg) {
aoqi@0:       super(p_msg);
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   /** reserved characters */
aoqi@0:   private static final String RESERVED_CHARACTERS = ";/?:@&=+$,";
aoqi@0: 
aoqi@0:   /** URI punctuation mark characters - these, combined with
aoqi@0:       alphanumerics, constitute the "unreserved" characters */
aoqi@0:   private static final String MARK_CHARACTERS = "-_.!~*'() ";
aoqi@0: 
aoqi@0:   /** scheme can be composed of alphanumerics and these characters */
aoqi@0:   private static final String SCHEME_CHARACTERS = "+-.";
aoqi@0: 
aoqi@0:   /** userinfo can be composed of unreserved, escaped and these
aoqi@0:       characters */
aoqi@0:   private static final String USERINFO_CHARACTERS = ";:&=+$,";
aoqi@0: 
aoqi@0:   /** Stores the scheme (usually the protocol) for this URI. */
aoqi@0:   private String m_scheme = null;
aoqi@0: 
aoqi@0:   /** If specified, stores the userinfo for this URI; otherwise null */
aoqi@0:   private String m_userinfo = null;
aoqi@0: 
aoqi@0:   /** If specified, stores the host for this URI; otherwise null */
aoqi@0:   private String m_host = null;
aoqi@0: 
aoqi@0:   /** If specified, stores the port for this URI; otherwise -1 */
aoqi@0:   private int m_port = -1;
aoqi@0: 
aoqi@0:   /** If specified, stores the path for this URI; otherwise null */
aoqi@0:   private String m_path = null;
aoqi@0: 
aoqi@0:   /** If specified, stores the query string for this URI; otherwise
aoqi@0:       null.  */
aoqi@0:   private String m_queryString = null;
aoqi@0: 
aoqi@0:   /** If specified, stores the fragment for this URI; otherwise null */
aoqi@0:   private String m_fragment = null;
aoqi@0: 
aoqi@0:   private static boolean DEBUG = false;
aoqi@0: 
aoqi@0:   /**
aoqi@0:   * Construct a new and uninitialized URI.
aoqi@0:   */
aoqi@0:   public JaxmURI() {
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Construct a new URI from another URI. All fields for this URI are
aoqi@0:   * set equal to the fields of the URI passed in.
aoqi@0:   *
aoqi@0:   * @param p_other the URI to copy (cannot be null)
aoqi@0:   */
aoqi@0:   public JaxmURI(JaxmURI p_other) {
aoqi@0:     initialize(p_other);
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Construct a new URI from a URI specification string. If the
aoqi@0:   * specification follows the "generic URI" syntax, (two slashes
aoqi@0:   * following the first colon), the specification will be parsed
aoqi@0:   * accordingly - setting the scheme, userinfo, host,port, path, query
aoqi@0:   * string and fragment fields as necessary. If the specification does
aoqi@0:   * not follow the "generic URI" syntax, the specification is parsed
aoqi@0:   * into a scheme and scheme-specific part (stored as the path) only.
aoqi@0:   *
aoqi@0:   * @param p_uriSpec the URI specification string (cannot be null or
aoqi@0:   *                  empty)
aoqi@0:   *
aoqi@0:   * @exception MalformedURIException if p_uriSpec violates any syntax
aoqi@0:   *                                   rules
aoqi@0:   */
aoqi@0:   public JaxmURI(String p_uriSpec) throws MalformedURIException {
aoqi@0:     this((JaxmURI)null, p_uriSpec);
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Construct a new URI from a base URI and a URI specification string.
aoqi@0:   * The URI specification string may be a relative URI.
aoqi@0:   *
aoqi@0:   * @param p_base the base URI (cannot be null if p_uriSpec is null or
aoqi@0:   *               empty)
aoqi@0:   * @param p_uriSpec the URI specification string (cannot be null or
aoqi@0:   *                  empty if p_base is null)
aoqi@0:   *
aoqi@0:   * @exception MalformedURIException if p_uriSpec violates any syntax
aoqi@0:   *                                  rules
aoqi@0:   */
aoqi@0:   public JaxmURI(JaxmURI p_base, String p_uriSpec) throws MalformedURIException {
aoqi@0:     initialize(p_base, p_uriSpec);
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Construct a new URI that does not follow the generic URI syntax.
aoqi@0:   * Only the scheme and scheme-specific part (stored as the path) are
aoqi@0:   * initialized.
aoqi@0:   *
aoqi@0:   * @param p_scheme the URI scheme (cannot be null or empty)
aoqi@0:   * @param p_schemeSpecificPart the scheme-specific part (cannot be
aoqi@0:   *                             null or empty)
aoqi@0:   *
aoqi@0:   * @exception MalformedURIException if p_scheme violates any
aoqi@0:   *                                  syntax rules
aoqi@0:   */
aoqi@0:   public JaxmURI(String p_scheme, String p_schemeSpecificPart)
aoqi@0:              throws MalformedURIException {
aoqi@0:     if (p_scheme == null || p_scheme.trim().length() == 0) {
aoqi@0:       throw new MalformedURIException(
aoqi@0:             "Cannot construct URI with null/empty scheme!");
aoqi@0:     }
aoqi@0:     if (p_schemeSpecificPart == null ||
aoqi@0:         p_schemeSpecificPart.trim().length() == 0) {
aoqi@0:       throw new MalformedURIException(
aoqi@0:           "Cannot construct URI with null/empty scheme-specific part!");
aoqi@0:     }
aoqi@0:     setScheme(p_scheme);
aoqi@0:     setPath(p_schemeSpecificPart);
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Construct a new URI that follows the generic URI syntax from its
aoqi@0:   * component parts. Each component is validated for syntax and some
aoqi@0:   * basic semantic checks are performed as well.  See the individual
aoqi@0:   * setter methods for specifics.
aoqi@0:   *
aoqi@0:   * @param p_scheme the URI scheme (cannot be null or empty)
aoqi@0:   * @param p_host the hostname or IPv4 address for the URI
aoqi@0:   * @param p_path the URI path - if the path contains '?' or '#',
aoqi@0:   *               then the query string and/or fragment will be
aoqi@0:   *               set from the path; however, if the query and
aoqi@0:   *               fragment are specified both in the path and as
aoqi@0:   *               separate parameters, an exception is thrown
aoqi@0:   * @param p_queryString the URI query string (cannot be specified
aoqi@0:   *                      if path is null)
aoqi@0:   * @param p_fragment the URI fragment (cannot be specified if path
aoqi@0:   *                   is null)
aoqi@0:   *
aoqi@0:   * @exception MalformedURIException if any of the parameters violates
aoqi@0:   *                                  syntax rules or semantic rules
aoqi@0:   */
aoqi@0:   public JaxmURI(String p_scheme, String p_host, String p_path,
aoqi@0:              String p_queryString, String p_fragment)
aoqi@0:          throws MalformedURIException {
aoqi@0:     this(p_scheme, null, p_host, -1, p_path, p_queryString, p_fragment);
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Construct a new URI that follows the generic URI syntax from its
aoqi@0:   * component parts. Each component is validated for syntax and some
aoqi@0:   * basic semantic checks are performed as well.  See the individual
aoqi@0:   * setter methods for specifics.
aoqi@0:   *
aoqi@0:   * @param p_scheme the URI scheme (cannot be null or empty)
aoqi@0:   * @param p_userinfo the URI userinfo (cannot be specified if host
aoqi@0:   *                   is null)
aoqi@0:   * @param p_host the hostname or IPv4 address for the URI
aoqi@0:   * @param p_port the URI port (may be -1 for "unspecified"; cannot
aoqi@0:   *               be specified if host is null)
aoqi@0:   * @param p_path the URI path - if the path contains '?' or '#',
aoqi@0:   *               then the query string and/or fragment will be
aoqi@0:   *               set from the path; however, if the query and
aoqi@0:   *               fragment are specified both in the path and as
aoqi@0:   *               separate parameters, an exception is thrown
aoqi@0:   * @param p_queryString the URI query string (cannot be specified
aoqi@0:   *                      if path is null)
aoqi@0:   * @param p_fragment the URI fragment (cannot be specified if path
aoqi@0:   *                   is null)
aoqi@0:   *
aoqi@0:   * @exception MalformedURIException if any of the parameters violates
aoqi@0:   *                                  syntax rules or semantic rules
aoqi@0:   */
aoqi@0:   public JaxmURI(String p_scheme, String p_userinfo,
aoqi@0:              String p_host, int p_port, String p_path,
aoqi@0:              String p_queryString, String p_fragment)
aoqi@0:          throws MalformedURIException {
aoqi@0:     if (p_scheme == null || p_scheme.trim().length() == 0) {
aoqi@0:       throw new MalformedURIException("Scheme is required!");
aoqi@0:     }
aoqi@0: 
aoqi@0:     if (p_host == null) {
aoqi@0:       if (p_userinfo != null) {
aoqi@0:         throw new MalformedURIException(
aoqi@0:              "Userinfo may not be specified if host is not specified!");
aoqi@0:       }
aoqi@0:       if (p_port != -1) {
aoqi@0:         throw new MalformedURIException(
aoqi@0:              "Port may not be specified if host is not specified!");
aoqi@0:       }
aoqi@0:     }
aoqi@0: 
aoqi@0:     if (p_path != null) {
aoqi@0:       if (p_path.indexOf('?') != -1 && p_queryString != null) {
aoqi@0:         throw new MalformedURIException(
aoqi@0:           "Query string cannot be specified in path and query string!");
aoqi@0:       }
aoqi@0: 
aoqi@0:       if (p_path.indexOf('#') != -1 && p_fragment != null) {
aoqi@0:         throw new MalformedURIException(
aoqi@0:           "Fragment cannot be specified in both the path and fragment!");
aoqi@0:       }
aoqi@0:     }
aoqi@0: 
aoqi@0:     setScheme(p_scheme);
aoqi@0:     setHost(p_host);
aoqi@0:     setPort(p_port);
aoqi@0:     setUserinfo(p_userinfo);
aoqi@0:     setPath(p_path);
aoqi@0:     setQueryString(p_queryString);
aoqi@0:     setFragment(p_fragment);
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Initialize all fields of this URI from another URI.
aoqi@0:   *
aoqi@0:   * @param p_other the URI to copy (cannot be null)
aoqi@0:   */
aoqi@0:   private void initialize(JaxmURI p_other) {
aoqi@0:     m_scheme = p_other.getScheme();
aoqi@0:     m_userinfo = p_other.getUserinfo();
aoqi@0:     m_host = p_other.getHost();
aoqi@0:     m_port = p_other.getPort();
aoqi@0:     m_path = p_other.getPath();
aoqi@0:     m_queryString = p_other.getQueryString();
aoqi@0:     m_fragment = p_other.getFragment();
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Initializes this URI from a base URI and a URI specification string.
aoqi@0:   * See RFC 2396 Section 4 and Appendix B for specifications on parsing
aoqi@0:   * the URI and Section 5 for specifications on resolving relative URIs
aoqi@0:   * and relative paths.
aoqi@0:   *
aoqi@0:   * @param p_base the base URI (may be null if p_uriSpec is an absolute
aoqi@0:   *               URI)
aoqi@0:   * @param p_uriSpec the URI spec string which may be an absolute or
aoqi@0:   *                  relative URI (can only be null/empty if p_base
aoqi@0:   *                  is not null)
aoqi@0:   *
aoqi@0:   * @exception MalformedURIException if p_base is null and p_uriSpec
aoqi@0:   *                                  is not an absolute URI or if
aoqi@0:   *                                  p_uriSpec violates syntax rules
aoqi@0:   */
aoqi@0:   private void initialize(JaxmURI p_base, String p_uriSpec)
aoqi@0:                          throws MalformedURIException {
aoqi@0:     if (p_base == null &&
aoqi@0:         (p_uriSpec == null || p_uriSpec.trim().length() == 0)) {
aoqi@0:       throw new MalformedURIException(
aoqi@0:                   "Cannot initialize URI with empty parameters.");
aoqi@0:       }
aoqi@0: 
aoqi@0:     // just make a copy of the base if spec is empty
aoqi@0:     if (p_uriSpec == null || p_uriSpec.trim().length() == 0) {
aoqi@0:       initialize(p_base);
aoqi@0:       return;
aoqi@0:     }
aoqi@0: 
aoqi@0:     String uriSpec = p_uriSpec.trim();
aoqi@0:     int uriSpecLen = uriSpec.length();
aoqi@0:     int index = 0;
aoqi@0: 
aoqi@0:     // Check for scheme, which must be before `/'. Also handle names with
aoqi@0:     // DOS drive letters ('D:'), so 1-character schemes are not allowed.
aoqi@0:     int colonIdx = uriSpec.indexOf(':');
aoqi@0:     int slashIdx = uriSpec.indexOf('/');
aoqi@0:     if ((colonIdx < 2) || (colonIdx > slashIdx && slashIdx != -1)) {
aoqi@0:       int fragmentIdx = uriSpec.indexOf('#');
aoqi@0:       // A standalone base is a valid URI according to spec
aoqi@0:       if (p_base == null && fragmentIdx != 0 ) {
aoqi@0:         throw new MalformedURIException("No scheme found in URI.");
aoqi@0:       }
aoqi@0:     }
aoqi@0:     else {
aoqi@0:       initializeScheme(uriSpec);
aoqi@0:       index = m_scheme.length()+1;
aoqi@0:     }
aoqi@0: 
aoqi@0:     // two slashes means generic URI syntax, so we get the authority
aoqi@0:     if (((index+1) < uriSpecLen) &&
aoqi@0:         (uriSpec.substring(index).startsWith("//"))) {
aoqi@0:       index += 2;
aoqi@0:       int startPos = index;
aoqi@0: 
aoqi@0:       // get authority - everything up to path, query or fragment
aoqi@0:       char testChar = '\0';
aoqi@0:       while (index < uriSpecLen) {
aoqi@0:         testChar = uriSpec.charAt(index);
aoqi@0:         if (testChar == '/' || testChar == '?' || testChar == '#') {
aoqi@0:           break;
aoqi@0:         }
aoqi@0:         index++;
aoqi@0:       }
aoqi@0: 
aoqi@0:       // if we found authority, parse it out, otherwise we set the
aoqi@0:       // host to empty string
aoqi@0:       if (index > startPos) {
aoqi@0:         initializeAuthority(uriSpec.substring(startPos, index));
aoqi@0:       }
aoqi@0:       else {
aoqi@0:         m_host = "";
aoqi@0:       }
aoqi@0:     }
aoqi@0: 
aoqi@0:     initializePath(uriSpec.substring(index));
aoqi@0: 
aoqi@0:     // Resolve relative URI to base URI - see RFC 2396 Section 5.2
aoqi@0:     // In some cases, it might make more sense to throw an exception
aoqi@0:     // (when scheme is specified is the string spec and the base URI
aoqi@0:     // is also specified, for example), but we're just following the
aoqi@0:     // RFC specifications
aoqi@0:     if (p_base != null) {
aoqi@0: 
aoqi@0:       // check to see if this is the current doc - RFC 2396 5.2 #2
aoqi@0:       // note that this is slightly different from the RFC spec in that
aoqi@0:       // we don't include the check for query string being null
aoqi@0:       // - this handles cases where the urispec is just a query
aoqi@0:       // string or a fragment (e.g. "?y" or "#s") -
aoqi@0:       // see <http://www.ics.uci.edu/~fielding/url/test1.html> which
aoqi@0:       // identified this as a bug in the RFC
aoqi@0:       if (m_path.length() == 0 && m_scheme == null &&
aoqi@0:           m_host == null) {
aoqi@0:         m_scheme = p_base.getScheme();
aoqi@0:         m_userinfo = p_base.getUserinfo();
aoqi@0:         m_host = p_base.getHost();
aoqi@0:         m_port = p_base.getPort();
aoqi@0:         m_path = p_base.getPath();
aoqi@0: 
aoqi@0:         if (m_queryString == null) {
aoqi@0:           m_queryString = p_base.getQueryString();
aoqi@0:         }
aoqi@0:         return;
aoqi@0:       }
aoqi@0: 
aoqi@0:       // check for scheme - RFC 2396 5.2 #3
aoqi@0:       // if we found a scheme, it means absolute URI, so we're done
aoqi@0:       if (m_scheme == null) {
aoqi@0:         m_scheme = p_base.getScheme();
aoqi@0:       }
aoqi@0:       else {
aoqi@0:         return;
aoqi@0:       }
aoqi@0: 
aoqi@0:       // check for authority - RFC 2396 5.2 #4
aoqi@0:       // if we found a host, then we've got a network path, so we're done
aoqi@0:       if (m_host == null) {
aoqi@0:         m_userinfo = p_base.getUserinfo();
aoqi@0:         m_host = p_base.getHost();
aoqi@0:         m_port = p_base.getPort();
aoqi@0:       }
aoqi@0:       else {
aoqi@0:         return;
aoqi@0:       }
aoqi@0: 
aoqi@0:       // check for absolute path - RFC 2396 5.2 #5
aoqi@0:       if (m_path.length() > 0 &&
aoqi@0:           m_path.startsWith("/")) {
aoqi@0:         return;
aoqi@0:       }
aoqi@0: 
aoqi@0:       // if we get to this point, we need to resolve relative path
aoqi@0:       // RFC 2396 5.2 #6
aoqi@0:       String path = "";
aoqi@0:       String basePath = p_base.getPath();
aoqi@0: 
aoqi@0:       // 6a - get all but the last segment of the base URI path
aoqi@0:       if (basePath != null) {
aoqi@0:         int lastSlash = basePath.lastIndexOf('/');
aoqi@0:         if (lastSlash != -1) {
aoqi@0:           path = basePath.substring(0, lastSlash+1);
aoqi@0:         }
aoqi@0:       }
aoqi@0: 
aoqi@0:       // 6b - append the relative URI path
aoqi@0:       path = path.concat(m_path);
aoqi@0: 
aoqi@0:       // 6c - remove all "./" where "." is a complete path segment
aoqi@0:       index = -1;
aoqi@0:       while ((index = path.indexOf("/./")) != -1) {
aoqi@0:         path = path.substring(0, index+1).concat(path.substring(index+3));
aoqi@0:       }
aoqi@0: 
aoqi@0:       // 6d - remove "." if path ends with "." as a complete path segment
aoqi@0:       if (path.endsWith("/.")) {
aoqi@0:         path = path.substring(0, path.length()-1);
aoqi@0:       }
aoqi@0: 
aoqi@0:       // 6e - remove all "<segment>/../" where "<segment>" is a complete
aoqi@0:       // path segment not equal to ".."
aoqi@0:       index = 1;
aoqi@0:       int segIndex = -1;
aoqi@0:       String tempString = null;
aoqi@0: 
aoqi@0:       while ((index = path.indexOf("/../", index)) > 0) {
aoqi@0:         tempString = path.substring(0, path.indexOf("/../"));
aoqi@0:         segIndex = tempString.lastIndexOf('/');
aoqi@0:         if (segIndex != -1) {
aoqi@0:           if (!tempString.substring(segIndex++).equals("..")) {
aoqi@0:             path = path.substring(0, segIndex).concat(path.substring(index+4));
aoqi@0:           }
aoqi@0:           else
aoqi@0:             index += 4;
aoqi@0:         }
aoqi@0:         else
aoqi@0:           index += 4;
aoqi@0:       }
aoqi@0: 
aoqi@0:       // 6f - remove ending "<segment>/.." where "<segment>" is a
aoqi@0:       // complete path segment
aoqi@0:       if (path.endsWith("/..")) {
aoqi@0:         tempString = path.substring(0, path.length()-3);
aoqi@0:         segIndex = tempString.lastIndexOf('/');
aoqi@0:         if (segIndex != -1) {
aoqi@0:           path = path.substring(0, segIndex+1);
aoqi@0:         }
aoqi@0:       }
aoqi@0:       m_path = path;
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Initialize the scheme for this URI from a URI string spec.
aoqi@0:   *
aoqi@0:   * @param p_uriSpec the URI specification (cannot be null)
aoqi@0:   *
aoqi@0:   * @exception MalformedURIException if URI does not have a conformant
aoqi@0:   *                                  scheme
aoqi@0:   */
aoqi@0:   private void initializeScheme(String p_uriSpec)
aoqi@0:                  throws MalformedURIException {
aoqi@0:     int uriSpecLen = p_uriSpec.length();
aoqi@0:     int index = 0;
aoqi@0:     String scheme = null;
aoqi@0:     char testChar = '\0';
aoqi@0: 
aoqi@0:     while (index < uriSpecLen) {
aoqi@0:       testChar = p_uriSpec.charAt(index);
aoqi@0:       if (testChar == ':' || testChar == '/' ||
aoqi@0:           testChar == '?' || testChar == '#') {
aoqi@0:         break;
aoqi@0:       }
aoqi@0:       index++;
aoqi@0:     }
aoqi@0:     scheme = p_uriSpec.substring(0, index);
aoqi@0: 
aoqi@0:     if (scheme.length() == 0) {
aoqi@0:       throw new MalformedURIException("No scheme found in URI.");
aoqi@0:     }
aoqi@0:     else {
aoqi@0:       setScheme(scheme);
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Initialize the authority (userinfo, host and port) for this
aoqi@0:   * URI from a URI string spec.
aoqi@0:   *
aoqi@0:   * @param p_uriSpec the URI specification (cannot be null)
aoqi@0:   *
aoqi@0:   * @exception MalformedURIException if p_uriSpec violates syntax rules
aoqi@0:   */
aoqi@0:   private void initializeAuthority(String p_uriSpec)
aoqi@0:                  throws MalformedURIException {
aoqi@0:     int index = 0;
aoqi@0:     int start = 0;
aoqi@0:     int end = p_uriSpec.length();
aoqi@0:     char testChar = '\0';
aoqi@0:     String userinfo = null;
aoqi@0: 
aoqi@0:     // userinfo is everything up @
aoqi@0:     if (p_uriSpec.indexOf('@', start) != -1) {
aoqi@0:       while (index < end) {
aoqi@0:         testChar = p_uriSpec.charAt(index);
aoqi@0:         if (testChar == '@') {
aoqi@0:           break;
aoqi@0:         }
aoqi@0:         index++;
aoqi@0:       }
aoqi@0:       userinfo = p_uriSpec.substring(start, index);
aoqi@0:       index++;
aoqi@0:     }
aoqi@0: 
aoqi@0:     // host is everything up to ':'
aoqi@0:     String host = null;
aoqi@0:     start = index;
aoqi@0:     while (index < end) {
aoqi@0:       testChar = p_uriSpec.charAt(index);
aoqi@0:       if (testChar == ':') {
aoqi@0:         break;
aoqi@0:       }
aoqi@0:       index++;
aoqi@0:     }
aoqi@0:     host = p_uriSpec.substring(start, index);
aoqi@0:     int port = -1;
aoqi@0:     if (host.length() > 0) {
aoqi@0:       // port
aoqi@0:       if (testChar == ':') {
aoqi@0:         index++;
aoqi@0:         start = index;
aoqi@0:         while (index < end) {
aoqi@0:           index++;
aoqi@0:         }
aoqi@0:         String portStr = p_uriSpec.substring(start, index);
aoqi@0:         if (portStr.length() > 0) {
aoqi@0:           for (int i = 0; i < portStr.length(); i++) {
aoqi@0:             if (!isDigit(portStr.charAt(i))) {
aoqi@0:               throw new MalformedURIException(
aoqi@0:                    portStr +
aoqi@0:                    " is invalid. Port should only contain digits!");
aoqi@0:             }
aoqi@0:           }
aoqi@0:           try {
aoqi@0:             port = Integer.parseInt(portStr);
aoqi@0:           }
aoqi@0:           catch (NumberFormatException nfe) {
aoqi@0:             // can't happen
aoqi@0:           }
aoqi@0:         }
aoqi@0:       }
aoqi@0:     }
aoqi@0:     setHost(host);
aoqi@0:     setPort(port);
aoqi@0:     setUserinfo(userinfo);
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Initialize the path for this URI from a URI string spec.
aoqi@0:   *
aoqi@0:   * @param p_uriSpec the URI specification (cannot be null)
aoqi@0:   *
aoqi@0:   * @exception MalformedURIException if p_uriSpec violates syntax rules
aoqi@0:   */
aoqi@0:   private void initializePath(String p_uriSpec)
aoqi@0:                  throws MalformedURIException {
aoqi@0:     if (p_uriSpec == null) {
aoqi@0:       throw new MalformedURIException(
aoqi@0:                 "Cannot initialize path from null string!");
aoqi@0:     }
aoqi@0: 
aoqi@0:     int index = 0;
aoqi@0:     int start = 0;
aoqi@0:     int end = p_uriSpec.length();
aoqi@0:     char testChar = '\0';
aoqi@0: 
aoqi@0:     // path - everything up to query string or fragment
aoqi@0:     while (index < end) {
aoqi@0:       testChar = p_uriSpec.charAt(index);
aoqi@0:       if (testChar == '?' || testChar == '#') {
aoqi@0:         break;
aoqi@0:       }
aoqi@0:       // check for valid escape sequence
aoqi@0:       if (testChar == '%') {
aoqi@0:          if (index+2 >= end ||
aoqi@0:             !isHex(p_uriSpec.charAt(index+1)) ||
aoqi@0:             !isHex(p_uriSpec.charAt(index+2))) {
aoqi@0:           throw new MalformedURIException(
aoqi@0:                 "Path contains invalid escape sequence!");
aoqi@0:          }
aoqi@0:       }
aoqi@0:       else if (!isReservedCharacter(testChar) &&
aoqi@0:                !isUnreservedCharacter(testChar)) {
aoqi@0:         throw new MalformedURIException(
aoqi@0:                   "Path contains invalid character: " + testChar);
aoqi@0:       }
aoqi@0:       index++;
aoqi@0:     }
aoqi@0:     m_path = p_uriSpec.substring(start, index);
aoqi@0: 
aoqi@0:     // query - starts with ? and up to fragment or end
aoqi@0:     if (testChar == '?') {
aoqi@0:       index++;
aoqi@0:       start = index;
aoqi@0:       while (index < end) {
aoqi@0:         testChar = p_uriSpec.charAt(index);
aoqi@0:         if (testChar == '#') {
aoqi@0:           break;
aoqi@0:         }
aoqi@0:         if (testChar == '%') {
aoqi@0:            if (index+2 >= end ||
aoqi@0:               !isHex(p_uriSpec.charAt(index+1)) ||
aoqi@0:               !isHex(p_uriSpec.charAt(index+2))) {
aoqi@0:             throw new MalformedURIException(
aoqi@0:                     "Query string contains invalid escape sequence!");
aoqi@0:            }
aoqi@0:         }
aoqi@0:         else if (!isReservedCharacter(testChar) &&
aoqi@0:                  !isUnreservedCharacter(testChar)) {
aoqi@0:           throw new MalformedURIException(
aoqi@0:                 "Query string contains invalid character:" + testChar);
aoqi@0:         }
aoqi@0:         index++;
aoqi@0:       }
aoqi@0:       m_queryString = p_uriSpec.substring(start, index);
aoqi@0:     }
aoqi@0: 
aoqi@0:     // fragment - starts with #
aoqi@0:     if (testChar == '#') {
aoqi@0:       index++;
aoqi@0:       start = index;
aoqi@0:       while (index < end) {
aoqi@0:         testChar = p_uriSpec.charAt(index);
aoqi@0: 
aoqi@0:         if (testChar == '%') {
aoqi@0:            if (index+2 >= end ||
aoqi@0:               !isHex(p_uriSpec.charAt(index+1)) ||
aoqi@0:               !isHex(p_uriSpec.charAt(index+2))) {
aoqi@0:             throw new MalformedURIException(
aoqi@0:                     "Fragment contains invalid escape sequence!");
aoqi@0:            }
aoqi@0:         }
aoqi@0:         else if (!isReservedCharacter(testChar) &&
aoqi@0:                  !isUnreservedCharacter(testChar)) {
aoqi@0:           throw new MalformedURIException(
aoqi@0:                 "Fragment contains invalid character:"+testChar);
aoqi@0:         }
aoqi@0:         index++;
aoqi@0:       }
aoqi@0:       m_fragment = p_uriSpec.substring(start, index);
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Get the scheme for this URI.
aoqi@0:   *
aoqi@0:   * @return the scheme for this URI
aoqi@0:   */
aoqi@0:   public String getScheme() {
aoqi@0:     return m_scheme;
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Get the scheme-specific part for this URI (everything following the
aoqi@0:   * scheme and the first colon). See RFC 2396 Section 5.2 for spec.
aoqi@0:   *
aoqi@0:   * @return the scheme-specific part for this URI
aoqi@0:   */
aoqi@0:   public String getSchemeSpecificPart() {
aoqi@0:     StringBuffer schemespec = new StringBuffer();
aoqi@0: 
aoqi@0:     if (m_userinfo != null || m_host != null || m_port != -1) {
aoqi@0:       schemespec.append("//");
aoqi@0:     }
aoqi@0: 
aoqi@0:     if (m_userinfo != null) {
aoqi@0:       schemespec.append(m_userinfo);
aoqi@0:       schemespec.append('@');
aoqi@0:     }
aoqi@0: 
aoqi@0:     if (m_host != null) {
aoqi@0:       schemespec.append(m_host);
aoqi@0:     }
aoqi@0: 
aoqi@0:     if (m_port != -1) {
aoqi@0:       schemespec.append(':');
aoqi@0:       schemespec.append(m_port);
aoqi@0:     }
aoqi@0: 
aoqi@0:     if (m_path != null) {
aoqi@0:       schemespec.append((m_path));
aoqi@0:     }
aoqi@0: 
aoqi@0:     if (m_queryString != null) {
aoqi@0:       schemespec.append('?');
aoqi@0:       schemespec.append(m_queryString);
aoqi@0:     }
aoqi@0: 
aoqi@0:     if (m_fragment != null) {
aoqi@0:       schemespec.append('#');
aoqi@0:       schemespec.append(m_fragment);
aoqi@0:     }
aoqi@0: 
aoqi@0:     return schemespec.toString();
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Get the userinfo for this URI.
aoqi@0:   *
aoqi@0:   * @return the userinfo for this URI (null if not specified).
aoqi@0:   */
aoqi@0:   public String getUserinfo() {
aoqi@0:     return m_userinfo;
aoqi@0:   }
aoqi@0: 
aoqi@0:   /**
aoqi@0:   * Get the host for this URI.
aoqi@0:   *
aoqi@0:   * @return the host for this URI (null if not specified).
aoqi@0:   */
aoqi@0:   public String getHost() {
aoqi@0:     return m_host;
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Get the port for this URI.
aoqi@0:   *
aoqi@0:   * @return the port for this URI (-1 if not specified).
aoqi@0:   */
aoqi@0:   public int getPort() {
aoqi@0:     return m_port;
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Get the path for this URI (optionally with the query string and
aoqi@0:   * fragment).
aoqi@0:   *
aoqi@0:   * @param p_includeQueryString if true (and query string is not null),
aoqi@0:   *                             then a "?" followed by the query string
aoqi@0:   *                             will be appended
aoqi@0:   * @param p_includeFragment if true (and fragment is not null),
aoqi@0:   *                             then a "#" followed by the fragment
aoqi@0:   *                             will be appended
aoqi@0:   *
aoqi@0:   * @return the path for this URI possibly including the query string
aoqi@0:   *         and fragment
aoqi@0:   */
aoqi@0:   public String getPath(boolean p_includeQueryString,
aoqi@0:                         boolean p_includeFragment) {
aoqi@0:     StringBuffer pathString = new StringBuffer(m_path);
aoqi@0: 
aoqi@0:     if (p_includeQueryString && m_queryString != null) {
aoqi@0:       pathString.append('?');
aoqi@0:       pathString.append(m_queryString);
aoqi@0:     }
aoqi@0: 
aoqi@0:     if (p_includeFragment && m_fragment != null) {
aoqi@0:       pathString.append('#');
aoqi@0:       pathString.append(m_fragment);
aoqi@0:     }
aoqi@0:     return pathString.toString();
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Get the path for this URI. Note that the value returned is the path
aoqi@0:   * only and does not include the query string or fragment.
aoqi@0:   *
aoqi@0:   * @return the path for this URI.
aoqi@0:   */
aoqi@0:   public String getPath() {
aoqi@0:     return m_path;
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Get the query string for this URI.
aoqi@0:   *
aoqi@0:   * @return the query string for this URI. Null is returned if there
aoqi@0:   *         was no "?" in the URI spec, empty string if there was a
aoqi@0:   *         "?" but no query string following it.
aoqi@0:   */
aoqi@0:   public String getQueryString() {
aoqi@0:     return m_queryString;
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Get the fragment for this URI.
aoqi@0:   *
aoqi@0:   * @return the fragment for this URI. Null is returned if there
aoqi@0:   *         was no "#" in the URI spec, empty string if there was a
aoqi@0:   *         "#" but no fragment following it.
aoqi@0:   */
aoqi@0:   public String getFragment() {
aoqi@0:     return m_fragment;
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Set the scheme for this URI. The scheme is converted to lowercase
aoqi@0:   * before it is set.
aoqi@0:   *
aoqi@0:   * @param p_scheme the scheme for this URI (cannot be null)
aoqi@0:   *
aoqi@0:   * @exception MalformedURIException if p_scheme is not a conformant
aoqi@0:   *                                  scheme name
aoqi@0:   */
aoqi@0:   public void setScheme(String p_scheme) throws MalformedURIException {
aoqi@0:     if (p_scheme == null) {
aoqi@0:       throw new MalformedURIException(
aoqi@0:                 "Cannot set scheme from null string!");
aoqi@0:     }
aoqi@0:     if (!isConformantSchemeName(p_scheme)) {
aoqi@0:       throw new MalformedURIException("The scheme is not conformant.");
aoqi@0:     }
aoqi@0: 
aoqi@0:     m_scheme = p_scheme.toLowerCase();
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Set the userinfo for this URI. If a non-null value is passed in and
aoqi@0:   * the host value is null, then an exception is thrown.
aoqi@0:   *
aoqi@0:   * @param p_userinfo the userinfo for this URI
aoqi@0:   *
aoqi@0:   * @exception MalformedURIException if p_userinfo contains invalid
aoqi@0:   *                                  characters
aoqi@0:   */
aoqi@0:   public void setUserinfo(String p_userinfo) throws MalformedURIException {
aoqi@0:     if (p_userinfo == null) {
aoqi@0:       m_userinfo = null;
aoqi@0:     }
aoqi@0:     else {
aoqi@0:       if (m_host == null) {
aoqi@0:         throw new MalformedURIException(
aoqi@0:                      "Userinfo cannot be set when host is null!");
aoqi@0:       }
aoqi@0: 
aoqi@0:       // userinfo can contain alphanumerics, mark characters, escaped
aoqi@0:       // and ';',':','&','=','+','$',','
aoqi@0:       int index = 0;
aoqi@0:       int end = p_userinfo.length();
aoqi@0:       char testChar = '\0';
aoqi@0:       while (index < end) {
aoqi@0:         testChar = p_userinfo.charAt(index);
aoqi@0:         if (testChar == '%') {
aoqi@0:           if (index+2 >= end ||
aoqi@0:               !isHex(p_userinfo.charAt(index+1)) ||
aoqi@0:               !isHex(p_userinfo.charAt(index+2))) {
aoqi@0:             throw new MalformedURIException(
aoqi@0:                   "Userinfo contains invalid escape sequence!");
aoqi@0:           }
aoqi@0:         }
aoqi@0:         else if (!isUnreservedCharacter(testChar) &&
aoqi@0:                  USERINFO_CHARACTERS.indexOf(testChar) == -1) {
aoqi@0:           throw new MalformedURIException(
aoqi@0:                   "Userinfo contains invalid character:"+testChar);
aoqi@0:         }
aoqi@0:         index++;
aoqi@0:       }
aoqi@0:     }
aoqi@0:     m_userinfo = p_userinfo;
aoqi@0:   }
aoqi@0: 
aoqi@0:   /**
aoqi@0:   * Set the host for this URI. If null is passed in, the userinfo
aoqi@0:   * field is also set to null and the port is set to -1.
aoqi@0:   *
aoqi@0:   * @param p_host the host for this URI
aoqi@0:   *
aoqi@0:   * @exception MalformedURIException if p_host is not a valid IP
aoqi@0:   *                                  address or DNS hostname.
aoqi@0:   */
aoqi@0:   public void setHost(String p_host) throws MalformedURIException {
aoqi@0:     if (p_host == null || p_host.trim().length() == 0) {
aoqi@0:       m_host = p_host;
aoqi@0:       m_userinfo = null;
aoqi@0:       m_port = -1;
aoqi@0:     }
aoqi@0:     else if (!isWellFormedAddress(p_host)) {
aoqi@0:       throw new MalformedURIException("Host is not a well formed address!");
aoqi@0:     }
aoqi@0:     m_host = p_host;
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Set the port for this URI. -1 is used to indicate that the port is
aoqi@0:   * not specified, otherwise valid port numbers are  between 0 and 65535.
aoqi@0:   * If a valid port number is passed in and the host field is null,
aoqi@0:   * an exception is thrown.
aoqi@0:   *
aoqi@0:   * @param p_port the port number for this URI
aoqi@0:   *
aoqi@0:   * @exception MalformedURIException if p_port is not -1 and not a
aoqi@0:   *                                  valid port number
aoqi@0:   */
aoqi@0:   public void setPort(int p_port) throws MalformedURIException {
aoqi@0:     if (p_port >= 0 && p_port <= 65535) {
aoqi@0:       if (m_host == null) {
aoqi@0:         throw new MalformedURIException(
aoqi@0:                       "Port cannot be set when host is null!");
aoqi@0:       }
aoqi@0:     }
aoqi@0:     else if (p_port != -1) {
aoqi@0:       throw new MalformedURIException("Invalid port number!");
aoqi@0:     }
aoqi@0:     m_port = p_port;
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Set the path for this URI. If the supplied path is null, then the
aoqi@0:   * query string and fragment are set to null as well. If the supplied
aoqi@0:   * path includes a query string and/or fragment, these fields will be
aoqi@0:   * parsed and set as well. Note that, for URIs following the "generic
aoqi@0:   * URI" syntax, the path specified should start with a slash.
aoqi@0:   * For URIs that do not follow the generic URI syntax, this method
aoqi@0:   * sets the scheme-specific part.
aoqi@0:   *
aoqi@0:   * @param p_path the path for this URI (may be null)
aoqi@0:   *
aoqi@0:   * @exception MalformedURIException if p_path contains invalid
aoqi@0:   *                                  characters
aoqi@0:   */
aoqi@0:   public void setPath(String p_path) throws MalformedURIException {
aoqi@0:     if (p_path == null) {
aoqi@0:       m_path = null;
aoqi@0:       m_queryString = null;
aoqi@0:       m_fragment = null;
aoqi@0:     }
aoqi@0:     else {
aoqi@0:       initializePath(p_path);
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Append to the end of the path of this URI. If the current path does
aoqi@0:   * not end in a slash and the path to be appended does not begin with
aoqi@0:   * a slash, a slash will be appended to the current path before the
aoqi@0:   * new segment is added. Also, if the current path ends in a slash
aoqi@0:   * and the new segment begins with a slash, the extra slash will be
aoqi@0:   * removed before the new segment is appended.
aoqi@0:   *
aoqi@0:   * @param p_addToPath the new segment to be added to the current path
aoqi@0:   *
aoqi@0:   * @exception MalformedURIException if p_addToPath contains syntax
aoqi@0:   *                                  errors
aoqi@0:   */
aoqi@0:   public void appendPath(String p_addToPath)
aoqi@0:                          throws MalformedURIException {
aoqi@0:     if (p_addToPath == null || p_addToPath.trim().length() == 0) {
aoqi@0:       return;
aoqi@0:     }
aoqi@0: 
aoqi@0:     if (!isURIString(p_addToPath)) {
aoqi@0:       throw new MalformedURIException(
aoqi@0:               "Path contains invalid character!");
aoqi@0:     }
aoqi@0: 
aoqi@0:     if (m_path == null || m_path.trim().length() == 0) {
aoqi@0:       if (p_addToPath.startsWith("/")) {
aoqi@0:         m_path = p_addToPath;
aoqi@0:       }
aoqi@0:       else {
aoqi@0:         m_path = "/" + p_addToPath;
aoqi@0:       }
aoqi@0:     }
aoqi@0:     else if (m_path.endsWith("/")) {
aoqi@0:       if (p_addToPath.startsWith("/")) {
aoqi@0:         m_path = m_path.concat(p_addToPath.substring(1));
aoqi@0:       }
aoqi@0:       else {
aoqi@0:         m_path = m_path.concat(p_addToPath);
aoqi@0:       }
aoqi@0:     }
aoqi@0:     else {
aoqi@0:       if (p_addToPath.startsWith("/")) {
aoqi@0:         m_path = m_path.concat(p_addToPath);
aoqi@0:       }
aoqi@0:       else {
aoqi@0:         m_path = m_path.concat("/" + p_addToPath);
aoqi@0:       }
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Set the query string for this URI. A non-null value is valid only
aoqi@0:   * if this is an URI conforming to the generic URI syntax and
aoqi@0:   * the path value is not null.
aoqi@0:   *
aoqi@0:   * @param p_queryString the query string for this URI
aoqi@0:   *
aoqi@0:   * @exception MalformedURIException if p_queryString is not null and this
aoqi@0:   *                                  URI does not conform to the generic
aoqi@0:   *                                  URI syntax or if the path is null
aoqi@0:   */
aoqi@0:   public void setQueryString(String p_queryString) throws MalformedURIException {
aoqi@0:     if (p_queryString == null) {
aoqi@0:       m_queryString = null;
aoqi@0:     }
aoqi@0:     else if (!isGenericURI()) {
aoqi@0:       throw new MalformedURIException(
aoqi@0:               "Query string can only be set for a generic URI!");
aoqi@0:     }
aoqi@0:     else if (getPath() == null) {
aoqi@0:       throw new MalformedURIException(
aoqi@0:               "Query string cannot be set when path is null!");
aoqi@0:     }
aoqi@0:     else if (!isURIString(p_queryString)) {
aoqi@0:       throw new MalformedURIException(
aoqi@0:               "Query string contains invalid character!");
aoqi@0:     }
aoqi@0:     else {
aoqi@0:       m_queryString = p_queryString;
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Set the fragment for this URI. A non-null value is valid only
aoqi@0:   * if this is a URI conforming to the generic URI syntax and
aoqi@0:   * the path value is not null.
aoqi@0:   *
aoqi@0:   * @param p_fragment the fragment for this URI
aoqi@0:   *
aoqi@0:   * @exception MalformedURIException if p_fragment is not null and this
aoqi@0:   *                                  URI does not conform to the generic
aoqi@0:   *                                  URI syntax or if the path is null
aoqi@0:   */
aoqi@0:   public void setFragment(String p_fragment) throws MalformedURIException {
aoqi@0:     if (p_fragment == null) {
aoqi@0:       m_fragment = null;
aoqi@0:     }
aoqi@0:     else if (!isGenericURI()) {
aoqi@0:       throw new MalformedURIException(
aoqi@0:          "Fragment can only be set for a generic URI!");
aoqi@0:     }
aoqi@0:     else if (getPath() == null) {
aoqi@0:       throw new MalformedURIException(
aoqi@0:               "Fragment cannot be set when path is null!");
aoqi@0:     }
aoqi@0:     else if (!isURIString(p_fragment)) {
aoqi@0:       throw new MalformedURIException(
aoqi@0:               "Fragment contains invalid character!");
aoqi@0:     }
aoqi@0:     else {
aoqi@0:       m_fragment = p_fragment;
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Determines if the passed-in Object is equivalent to this URI.
aoqi@0:   *
aoqi@0:   * @param p_test the Object to test for equality.
aoqi@0:   *
aoqi@0:   * @return true if p_test is a URI with all values equal to this
aoqi@0:   *         URI, false otherwise
aoqi@0:   */
aoqi@0:   public boolean equals(Object p_test) {
aoqi@0:     if (p_test instanceof JaxmURI) {
aoqi@0:       JaxmURI testURI = (JaxmURI) p_test;
aoqi@0:       if (((m_scheme == null && testURI.m_scheme == null) ||
aoqi@0:            (m_scheme != null && testURI.m_scheme != null &&
aoqi@0:             m_scheme.equals(testURI.m_scheme))) &&
aoqi@0:           ((m_userinfo == null && testURI.m_userinfo == null) ||
aoqi@0:            (m_userinfo != null && testURI.m_userinfo != null &&
aoqi@0:             m_userinfo.equals(testURI.m_userinfo))) &&
aoqi@0:           ((m_host == null && testURI.m_host == null) ||
aoqi@0:            (m_host != null && testURI.m_host != null &&
aoqi@0:             m_host.equals(testURI.m_host))) &&
aoqi@0:             m_port == testURI.m_port &&
aoqi@0:           ((m_path == null && testURI.m_path == null) ||
aoqi@0:            (m_path != null && testURI.m_path != null &&
aoqi@0:             m_path.equals(testURI.m_path))) &&
aoqi@0:           ((m_queryString == null && testURI.m_queryString == null) ||
aoqi@0:            (m_queryString != null && testURI.m_queryString != null &&
aoqi@0:             m_queryString.equals(testURI.m_queryString))) &&
aoqi@0:           ((m_fragment == null && testURI.m_fragment == null) ||
aoqi@0:            (m_fragment != null && testURI.m_fragment != null &&
aoqi@0:             m_fragment.equals(testURI.m_fragment)))) {
aoqi@0:         return true;
aoqi@0:       }
aoqi@0:     }
aoqi@0:     return false;
aoqi@0:   }
aoqi@0: 
aoqi@0:   public int hashCode() {
aoqi@0:           // No members safe to use, just default to a constant.
aoqi@0:           return 153214;
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Get the URI as a string specification. See RFC 2396 Section 5.2.
aoqi@0:   *
aoqi@0:   * @return the URI string specification
aoqi@0:   */
aoqi@0:   public String toString() {
aoqi@0:     StringBuffer uriSpecString = new StringBuffer();
aoqi@0: 
aoqi@0:     if (m_scheme != null) {
aoqi@0:       uriSpecString.append(m_scheme);
aoqi@0:       uriSpecString.append(':');
aoqi@0:     }
aoqi@0:     uriSpecString.append(getSchemeSpecificPart());
aoqi@0:     return uriSpecString.toString();
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Get the indicator as to whether this URI uses the "generic URI"
aoqi@0:   * syntax.
aoqi@0:   *
aoqi@0:   * @return true if this URI uses the "generic URI" syntax, false
aoqi@0:   *         otherwise
aoqi@0:   */
aoqi@0:   public boolean isGenericURI() {
aoqi@0:     // presence of the host (whether valid or empty) means
aoqi@0:     // double-slashes which means generic uri
aoqi@0:     return (m_host != null);
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Determine whether a scheme conforms to the rules for a scheme name.
aoqi@0:   * A scheme is conformant if it starts with an alphanumeric, and
aoqi@0:   * contains only alphanumerics, '+','-' and '.'.
aoqi@0:   *
aoqi@0:   * @return true if the scheme is conformant, false otherwise
aoqi@0:   */
aoqi@0:   public static boolean isConformantSchemeName(String p_scheme) {
aoqi@0:     if (p_scheme == null || p_scheme.trim().length() == 0) {
aoqi@0:       return false;
aoqi@0:     }
aoqi@0: 
aoqi@0:     if (!isAlpha(p_scheme.charAt(0))) {
aoqi@0:       return false;
aoqi@0:     }
aoqi@0: 
aoqi@0:     char testChar;
aoqi@0:     for (int i = 1; i < p_scheme.length(); i++) {
aoqi@0:       testChar = p_scheme.charAt(i);
aoqi@0:       if (!isAlphanum(testChar) &&
aoqi@0:           SCHEME_CHARACTERS.indexOf(testChar) == -1) {
aoqi@0:         return false;
aoqi@0:       }
aoqi@0:     }
aoqi@0: 
aoqi@0:     return true;
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Determine whether a string is syntactically capable of representing
aoqi@0:   * a valid IPv4 address or the domain name of a network host. A valid
aoqi@0:   * IPv4 address consists of four decimal digit groups separated by a
aoqi@0:   * '.'. A hostname consists of domain labels (each of which must
aoqi@0:   * begin and end with an alphanumeric but may contain '-') separated
aoqi@0:   & by a '.'. See RFC 2396 Section 3.2.2.
aoqi@0:   *
aoqi@0:   * @return true if the string is a syntactically valid IPv4 address
aoqi@0:   *              or hostname
aoqi@0:   */
aoqi@0:   public static boolean isWellFormedAddress(String p_address) {
aoqi@0:     if (p_address == null) {
aoqi@0:       return false;
aoqi@0:     }
aoqi@0: 
aoqi@0:     String address = p_address.trim();
aoqi@0:     int addrLength = address.length();
aoqi@0:     if (addrLength == 0 || addrLength > 255) {
aoqi@0:       return false;
aoqi@0:     }
aoqi@0: 
aoqi@0:     if (address.startsWith(".") || address.startsWith("-")) {
aoqi@0:       return false;
aoqi@0:     }
aoqi@0: 
aoqi@0:     // rightmost domain label starting with digit indicates IP address
aoqi@0:     // since top level domain label can only start with an alpha
aoqi@0:     // see RFC 2396 Section 3.2.2
aoqi@0:     int index = address.lastIndexOf('.');
aoqi@0:     if (address.endsWith(".")) {
aoqi@0:       index = address.substring(0, index).lastIndexOf('.');
aoqi@0:     }
aoqi@0: 
aoqi@0:     if (index+1 < addrLength && isDigit(p_address.charAt(index+1))) {
aoqi@0:       char testChar;
aoqi@0:       int numDots = 0;
aoqi@0: 
aoqi@0:       // make sure that 1) we see only digits and dot separators, 2) that
aoqi@0:       // any dot separator is preceded and followed by a digit and
aoqi@0:       // 3) that we find 3 dots
aoqi@0:       for (int i = 0; i < addrLength; i++) {
aoqi@0:         testChar = address.charAt(i);
aoqi@0:         if (testChar == '.') {
aoqi@0:           if (!isDigit(address.charAt(i-1)) ||
aoqi@0:               (i+1 < addrLength && !isDigit(address.charAt(i+1)))) {
aoqi@0:             return false;
aoqi@0:           }
aoqi@0:           numDots++;
aoqi@0:         }
aoqi@0:         else if (!isDigit(testChar)) {
aoqi@0:           return false;
aoqi@0:         }
aoqi@0:       }
aoqi@0:       if (numDots != 3) {
aoqi@0:         return false;
aoqi@0:       }
aoqi@0:     }
aoqi@0:     else {
aoqi@0:       // domain labels can contain alphanumerics and '-"
aoqi@0:       // but must start and end with an alphanumeric
aoqi@0:       char testChar;
aoqi@0: 
aoqi@0:       for (int i = 0; i < addrLength; i++) {
aoqi@0:         testChar = address.charAt(i);
aoqi@0:         if (testChar == '.') {
aoqi@0:           if (!isAlphanum(address.charAt(i-1))) {
aoqi@0:             return false;
aoqi@0:           }
aoqi@0:           if (i+1 < addrLength && !isAlphanum(address.charAt(i+1))) {
aoqi@0:             return false;
aoqi@0:           }
aoqi@0:         }
aoqi@0:         else if (!isAlphanum(testChar) && testChar != '-') {
aoqi@0:           return false;
aoqi@0:         }
aoqi@0:       }
aoqi@0:     }
aoqi@0:     return true;
aoqi@0:   }
aoqi@0: 
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Determine whether a char is a digit.
aoqi@0:   *
aoqi@0:   * @return true if the char is betweeen '0' and '9', false otherwise
aoqi@0:   */
aoqi@0:   private static boolean isDigit(char p_char) {
aoqi@0:     return p_char >= '0' && p_char <= '9';
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Determine whether a character is a hexadecimal character.
aoqi@0:   *
aoqi@0:   * @return true if the char is betweeen '0' and '9', 'a' and 'f'
aoqi@0:   *         or 'A' and 'F', false otherwise
aoqi@0:   */
aoqi@0:   private static boolean isHex(char p_char) {
aoqi@0:     return (isDigit(p_char) ||
aoqi@0:             (p_char >= 'a' && p_char <= 'f') ||
aoqi@0:             (p_char >= 'A' && p_char <= 'F'));
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Determine whether a char is an alphabetic character: a-z or A-Z
aoqi@0:   *
aoqi@0:   * @return true if the char is alphabetic, false otherwise
aoqi@0:   */
aoqi@0:   private static boolean isAlpha(char p_char) {
aoqi@0:     return ((p_char >= 'a' && p_char <= 'z') ||
aoqi@0:             (p_char >= 'A' && p_char <= 'Z' ));
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Determine whether a char is an alphanumeric: 0-9, a-z or A-Z
aoqi@0:   *
aoqi@0:   * @return true if the char is alphanumeric, false otherwise
aoqi@0:   */
aoqi@0:   private static boolean isAlphanum(char p_char) {
aoqi@0:     return (isAlpha(p_char) || isDigit(p_char));
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Determine whether a character is a reserved character:
aoqi@0:   * ';', '/', '?', ':', '@', '&', '=', '+', '$' or ','
aoqi@0:   *
aoqi@0:   * @return true if the string contains any reserved characters
aoqi@0:   */
aoqi@0:   private static boolean isReservedCharacter(char p_char) {
aoqi@0:     return RESERVED_CHARACTERS.indexOf(p_char) != -1;
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Determine whether a char is an unreserved character.
aoqi@0:   *
aoqi@0:   * @return true if the char is unreserved, false otherwise
aoqi@0:   */
aoqi@0:   private static boolean isUnreservedCharacter(char p_char) {
aoqi@0:     return (isAlphanum(p_char) ||
aoqi@0:             MARK_CHARACTERS.indexOf(p_char) != -1);
aoqi@0:   }
aoqi@0: 
aoqi@0:  /**
aoqi@0:   * Determine whether a given string contains only URI characters (also
aoqi@0:   * called "uric" in RFC 2396). uric consist of all reserved
aoqi@0:   * characters, unreserved characters and escaped characters.
aoqi@0:   *
aoqi@0:   * @return true if the string is comprised of uric, false otherwise
aoqi@0:   */
aoqi@0:   private static boolean isURIString(String p_uric) {
aoqi@0:     if (p_uric == null) {
aoqi@0:       return false;
aoqi@0:     }
aoqi@0:     int end = p_uric.length();
aoqi@0:     char testChar = '\0';
aoqi@0:     for (int i = 0; i < end; i++) {
aoqi@0:       testChar = p_uric.charAt(i);
aoqi@0:       if (testChar == '%') {
aoqi@0:         if (i+2 >= end ||
aoqi@0:             !isHex(p_uric.charAt(i+1)) ||
aoqi@0:             !isHex(p_uric.charAt(i+2))) {
aoqi@0:           return false;
aoqi@0:         }
aoqi@0:         else {
aoqi@0:           i += 2;
aoqi@0:           continue;
aoqi@0:         }
aoqi@0:       }
aoqi@0:       if (isReservedCharacter(testChar) ||
aoqi@0:           isUnreservedCharacter(testChar)) {
aoqi@0:           continue;
aoqi@0:       }
aoqi@0:       else {
aoqi@0:         return false;
aoqi@0:       }
aoqi@0:     }
aoqi@0:     return true;
aoqi@0:   }
aoqi@0: }