1 /*

     2 * Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies). 

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  Entity Resolver for using external DTD files in XML parsing.

    15  *

    16 */

    17 

    18 

    19 package com.nokia.tools.themeinstaller.xmlparser;

    20 

    21 import java.io.IOException;

    22 

    23 import org.xml.sax.EntityResolver;

    24 import org.xml.sax.InputSource;

    25 import org.xml.sax.SAXException;

    26 

    27 /**

    28  * DTD Entity Resolver is for using external DTD files in XML parsing.

    29  * The resolveEntity method returns null if the provided system id does

    30  * not end with the ".dtd".

    31  */

    32 public class DTDEntityResolver implements EntityResolver

    33     {

    34 

    35     // CONSTANTS

    36     // DTD file extension

    37     private static final String DTD_FILE_EXT = ".dtd";

    38 

    39     // File name of the external DTD

    40     private String iFileName;

    41 

    42     /**

    43      * Constructor.

    44      * @param aFileName file name of the DTD file

    45      */

    46     public DTDEntityResolver( String aFileName )

    47         {

    48         iFileName = aFileName;

    49         }

    50 

    51     /* (non-Javadoc)

    52      * @see org.xml.sax.EntityResolver#resolveEntity(java.lang.String, java.lang.String)

    53      */

    54     public InputSource resolveEntity( String aPublicId, String aSystemId )

    55             throws SAXException, IOException

    56         {

    57         DTDInputSource is = null;

    58 

    59         // For DTD files, provide input source containing the external DTD for

    60         // the XML parser

    61         if( aSystemId.endsWith( DTD_FILE_EXT ) )

    62             {

    63             is = new DTDInputSource( iFileName );

    64             }

    65 

    66         return is;

    67         }

    68 

    69     }