1 /*
   2  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.tools.internal.ws.util;
  27 
  28 import org.xml.sax.EntityResolver;
  29 import org.xml.sax.InputSource;
  30 import org.xml.sax.SAXException;
  31 
  32 import java.io.IOException;
  33 
  34 /**
  35  * {@link EntityResolver} that delegates to two {@link EntityResolver}s.
  36  *
  37  * @author WS Development Team
  38  */
  39 public class ForkEntityResolver implements EntityResolver {
  40     private final EntityResolver lhs;
  41     private final EntityResolver rhs;
  42 
  43     public ForkEntityResolver(EntityResolver lhs, EntityResolver rhs) {
  44         this.lhs = lhs;
  45         this.rhs = rhs;
  46     }
  47 
  48     public InputSource resolveEntity(String publicId, String systemId) throws SAXException, IOException {
  49         InputSource is = lhs.resolveEntity(publicId, systemId);
  50         if(is!=null)
  51             return is;
  52 
  53         if(publicId == null) {
  54           // WorkAround: Ant's XMLCatalog supports public IDs only, this allows us to treat it as system IDs
  55           publicId = systemId;
  56         }
  57 
  58         return rhs.resolveEntity(publicId, systemId);
  59     }
  60 }