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  * 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

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  * questions.

  */

 /*

  * @(#)ContentType.java       1.7 02/03/27

  */

 package com.sun.xml.internal.messaging.saaj.packaging.mime.internet;

 /**

  * This class represents a MIME ContentType value. It provides

  * methods to parse a ContentType string into individual components

  * and to generate a MIME style ContentType string.

  *

  * @version 1.7, 02/03/27

  * @author  John Mani

  */

 public final class ContentType {

     private String primaryType; // primary type

     private String subType;     // subtype

     private ParameterList list; // parameter list

     /**

      * No-arg Constructor.

      */

     public ContentType() { }

     /**

      * Constructor.

      *

      * @param   primaryType     primary type

      * @param   subType subType

      * @param   list    ParameterList

      */

     public ContentType(String primaryType, String subType,

                        ParameterList list) {

         this.primaryType = primaryType;

         this.subType = subType;

         if (list == null)

             list = new ParameterList();

         this.list = list;

     }

     /**

      * Constructor that takes a Content-Type string. The String

      * is parsed into its constituents: primaryType, subType

      * and parameters. A ParseException is thrown if the parse fails.

      *

      * @param   s       the Content-Type string.

      * @exception       ParseException if the parse fails.

      */

     public ContentType(String s) throws ParseException {

         HeaderTokenizer h = new HeaderTokenizer(s, HeaderTokenizer.MIME);

         HeaderTokenizer.Token tk;

         // First "type" ..

         tk = h.next();

         if (tk.getType() != HeaderTokenizer.Token.ATOM)

             throw new ParseException();

         primaryType = tk.getValue();

         // The '/' separator ..

         tk = h.next();

         if ((char)tk.getType() != '/')

             throw new ParseException();

         // Then "subType" ..

         tk = h.next();

         if (tk.getType() != HeaderTokenizer.Token.ATOM)

             throw new ParseException();

         subType = tk.getValue();

         // Finally parameters ..

         String rem = h.getRemainder();

         if (rem != null)

             list = new ParameterList(rem);

     }

     public ContentType copy() {

         return new ContentType(primaryType,subType,list.copy());

     }

     /**

      * Return the primary type.

      * @return the primary type

      */

     public String getPrimaryType() {

         return primaryType;

     }

     /**

      * Return the subType.

      * @return the subType

      */

     public String getSubType() {

         return subType;

     }

     /**

      * Return the MIME type string, without the parameters.

      * The returned value is basically the concatenation of

      * the primaryType, the '/' character and the secondaryType.

      *

      * @return the type

      */

     public String getBaseType() {

         return primaryType + '/' + subType;

     }

     /**

      * Return the specified parameter value. Returns <code>null</code>

      * if this parameter is absent.

      * @return  parameter value

      */

     public String getParameter(String name) {

         if (list == null)

             return null;

         return list.get(name);

     }

     /**

      * Return a ParameterList object that holds all the available

      * parameters. Returns null if no parameters are available.

      *

      * @return  ParameterList

      */

     public ParameterList getParameterList() {

         return list;

     }

     /**

      * Set the primary type. Overrides existing primary type.

      * @param   primaryType     primary type

      */

     public void setPrimaryType(String primaryType) {

         this.primaryType = primaryType;

     }

     /**

      * Set the subType. Overrides existing subType

      * @param   subType subType

      */

     public void setSubType(String subType) {

         this.subType = subType;

     }

     /**

      * Set the specified parameter. If this parameter already exists,

      * it is replaced by this new value.

      *

      * @param   name    parameter name

      * @param   value   parameter value

      */

     public void setParameter(String name, String value) {

         if (list == null)

             list = new ParameterList();

         list.set(name, value);

     }

     /**

      * Set a new ParameterList.

      * @param   list    ParameterList

      */

     public void setParameterList(ParameterList list) {

         this.list = list;

     }

     /**

      * Retrieve a RFC2045 style string representation of

      * this Content-Type. Returns <code>null</code> if

      * the conversion failed.

      *

      * @return  RFC2045 style string

      */

     public String toString() {

         if (primaryType == null || subType == null) // need both

             return null;

         StringBuffer sb = new StringBuffer();

         sb.append(primaryType).append('/').append(subType);

         if (list != null)

         // Http Binding section of the "SOAP with attachments" specification says,

         // "SOAP message senders should send Content-Type headers on a single long line."

         // (http://www.w3.org/TR/SOAP-attachments#HTTPBinding)

             sb.append(list.toString());

         return sb.toString();

     }

     /**

      * Match with the specified ContentType object. This method

      * compares <strong>only the <code>primaryType</code> and

      * <code>subType</code> </strong>. The parameters of both operands

      * are ignored. <p>

      *

      * For example, this method will return <code>true</code> when

      * comparing the ContentTypes for <strong>"text/plain"</strong>

      * and <strong>"text/plain; charset=foobar"</strong>.

      *

      * If the <code>subType</code> of either operand is the special

      * character '*', then the subtype is ignored during the match.

      * For example, this method will return <code>true</code> when

      * comparing the ContentTypes for <strong>"text/plain"</strong>

      * and <strong>"text/*" </strong>

      *

      * @param   cType to compare this against

      */

     public boolean match(ContentType cType) {

         // Match primaryType

         if (!primaryType.equalsIgnoreCase(cType.getPrimaryType()))

             return false;

         String sType = cType.getSubType();

         // If either one of the subTypes is wildcarded, return true

         if ((subType.charAt(0) == '*') || (sType.charAt(0) == '*'))

             return true;

         // Match subType

         if (!subType.equalsIgnoreCase(sType))

             return false;

         return true;

     }

     /**

      * Match with the specified content-type string. This method

      * compares <strong>only the <code>primaryType</code> and

      * <code>subType</code> </strong>.

      * The parameters of both operands are ignored. <p>

      *

      * For example, this method will return <code>true</code> when

      * comparing the ContentType for <strong>"text/plain"</strong>

      * with <strong>"text/plain; charset=foobar"</strong>.

      *

      * If the <code>subType</code> of either operand is the special

      * character '*', then the subtype is ignored during the match.

      * For example, this method will return <code>true</code> when

      * comparing the ContentType for <strong>"text/plain"</strong>

      * with <strong>"text/*" </strong>

      */

     public boolean match(String s) {

         try {

             return match(new ContentType(s));

         } catch (ParseException pex) {

             return false;

         }

     }

 }