diff -r 000000000000 -r 373ffda63c9a src/share/jaf_classes/javax/activation/MimeTypeParameterList.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/jaf_classes/javax/activation/MimeTypeParameterList.java Wed Apr 27 01:27:09 2016 +0800 @@ -0,0 +1,339 @@ +/* + * Copyright (c) 1997, 2005, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +package javax.activation; + +import java.util.Hashtable; +import java.util.Enumeration; +import java.util.Locale; + +/** + * A parameter list of a MimeType + * as defined in RFC 2045 and 2046. The Primary type of the + * object must already be stripped off. + * + * @see javax.activation.MimeType + * + * @since 1.6 + */ +public class MimeTypeParameterList { + private Hashtable parameters; + + /** + * A string that holds all the special chars. + */ + private static final String TSPECIALS = "()<>@,;:/[]?=\\\""; + + + /** + * Default constructor. + */ + public MimeTypeParameterList() { + parameters = new Hashtable(); + } + + /** + * Constructs a new MimeTypeParameterList with the passed in data. + * + * @param parameterList an RFC 2045, 2046 compliant parameter list. + */ + public MimeTypeParameterList(String parameterList) + throws MimeTypeParseException { + parameters = new Hashtable(); + + // now parse rawdata + parse(parameterList); + } + + /** + * A routine for parsing the parameter list out of a String. + * + * @param parameterList an RFC 2045, 2046 compliant parameter list. + */ + protected void parse(String parameterList) throws MimeTypeParseException { + if (parameterList == null) + return; + + int length = parameterList.length(); + if (length <= 0) + return; + + int i; + char c; + for (i = skipWhiteSpace(parameterList, 0); + i < length && (c = parameterList.charAt(i)) == ';'; + i = skipWhiteSpace(parameterList, i)) { + int lastIndex; + String name; + String value; + + // eat the ';' + i++; + + // now parse the parameter name + + // skip whitespace + i = skipWhiteSpace(parameterList, i); + + // tolerate trailing semicolon, even though it violates the spec + if (i >= length) + return; + + // find the end of the token char run + lastIndex = i; + while ((i < length) && isTokenChar(parameterList.charAt(i))) + i++; + + name = parameterList.substring(lastIndex, i). + toLowerCase(Locale.ENGLISH); + + // now parse the '=' that separates the name from the value + i = skipWhiteSpace(parameterList, i); + + if (i >= length || parameterList.charAt(i) != '=') + throw new MimeTypeParseException( + "Couldn't find the '=' that separates a " + + "parameter name from its value."); + + // eat it and parse the parameter value + i++; + i = skipWhiteSpace(parameterList, i); + + if (i >= length) + throw new MimeTypeParseException( + "Couldn't find a value for parameter named " + name); + + // now find out whether or not we have a quoted value + c = parameterList.charAt(i); + if (c == '"') { + // yup it's quoted so eat it and capture the quoted string + i++; + if (i >= length) + throw new MimeTypeParseException( + "Encountered unterminated quoted parameter value."); + + lastIndex = i; + + // find the next unescaped quote + while (i < length) { + c = parameterList.charAt(i); + if (c == '"') + break; + if (c == '\\') { + // found an escape sequence + // so skip this and the + // next character + i++; + } + i++; + } + if (c != '"') + throw new MimeTypeParseException( + "Encountered unterminated quoted parameter value."); + + value = unquote(parameterList.substring(lastIndex, i)); + // eat the quote + i++; + } else if (isTokenChar(c)) { + // nope it's an ordinary token so it + // ends with a non-token char + lastIndex = i; + while (i < length && isTokenChar(parameterList.charAt(i))) + i++; + value = parameterList.substring(lastIndex, i); + } else { + // it ain't a value + throw new MimeTypeParseException( + "Unexpected character encountered at index " + i); + } + + // now put the data into the hashtable + parameters.put(name, value); + } + if (i < length) { + throw new MimeTypeParseException( + "More characters encountered in input than expected."); + } + } + + /** + * Return the number of name-value pairs in this list. + * + * @return the number of parameters + */ + public int size() { + return parameters.size(); + } + + /** + * Determine whether or not this list is empty. + * + * @return true if there are no parameters + */ + public boolean isEmpty() { + return parameters.isEmpty(); + } + + /** + * Retrieve the value associated with the given name, or null if there + * is no current association. + * + * @param name the parameter name + * @return the parameter's value + */ + public String get(String name) { + return (String)parameters.get(name.trim().toLowerCase(Locale.ENGLISH)); + } + + /** + * Set the value to be associated with the given name, replacing + * any previous association. + * + * @param name the parameter name + * @param value the parameter's value + */ + public void set(String name, String value) { + parameters.put(name.trim().toLowerCase(Locale.ENGLISH), value); + } + + /** + * Remove any value associated with the given name. + * + * @param name the parameter name + */ + public void remove(String name) { + parameters.remove(name.trim().toLowerCase(Locale.ENGLISH)); + } + + /** + * Retrieve an enumeration of all the names in this list. + * + * @return an enumeration of all parameter names + */ + public Enumeration getNames() { + return parameters.keys(); + } + + /** + * Return a string representation of this object. + */ + public String toString() { + StringBuffer buffer = new StringBuffer(); + buffer.ensureCapacity(parameters.size() * 16); + // heuristic: 8 characters per field + + Enumeration keys = parameters.keys(); + while (keys.hasMoreElements()) { + String key = (String)keys.nextElement(); + buffer.append("; "); + buffer.append(key); + buffer.append('='); + buffer.append(quote((String)parameters.get(key))); + } + + return buffer.toString(); + } + + // below here be scary parsing related things + + /** + * Determine whether or not a given character belongs to a legal token. + */ + private static boolean isTokenChar(char c) { + return ((c > 040) && (c < 0177)) && (TSPECIALS.indexOf(c) < 0); + } + + /** + * return the index of the first non white space character in + * rawdata at or after index i. + */ + private static int skipWhiteSpace(String rawdata, int i) { + int length = rawdata.length(); + while ((i < length) && Character.isWhitespace(rawdata.charAt(i))) + i++; + return i; + } + + /** + * A routine that knows how and when to quote and escape the given value. + */ + private static String quote(String value) { + boolean needsQuotes = false; + + // check to see if we actually have to quote this thing + int length = value.length(); + for (int i = 0; (i < length) && !needsQuotes; i++) { + needsQuotes = !isTokenChar(value.charAt(i)); + } + + if (needsQuotes) { + StringBuffer buffer = new StringBuffer(); + buffer.ensureCapacity((int)(length * 1.5)); + + // add the initial quote + buffer.append('"'); + + // add the properly escaped text + for (int i = 0; i < length; ++i) { + char c = value.charAt(i); + if ((c == '\\') || (c == '"')) + buffer.append('\\'); + buffer.append(c); + } + + // add the closing quote + buffer.append('"'); + + return buffer.toString(); + } else { + return value; + } + } + + /** + * A routine that knows how to strip the quotes and + * escape sequences from the given value. + */ + private static String unquote(String value) { + int valueLength = value.length(); + StringBuffer buffer = new StringBuffer(); + buffer.ensureCapacity(valueLength); + + boolean escaped = false; + for (int i = 0; i < valueLength; ++i) { + char currentChar = value.charAt(i); + if (!escaped && (currentChar != '\\')) { + buffer.append(currentChar); + } else if (escaped) { + buffer.append(currentChar); + escaped = false; + } else { + escaped = true; + } + } + + return buffer.toString(); + } +}