1 /*
   2  * Copyright (c) 1997, 2014, 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.xml.internal.bind.v2.runtime.unmarshaller;
  27 
  28 import java.util.Collection;
  29 
  30 import javax.xml.namespace.QName;
  31 
  32 import com.sun.xml.internal.bind.DatatypeConverterImpl;
  33 import com.sun.xml.internal.bind.v2.WellKnownNamespace;
  34 import com.sun.xml.internal.bind.v2.runtime.ClassBeanInfoImpl;
  35 import com.sun.xml.internal.bind.v2.runtime.JaxBeanInfo;
  36 import com.sun.xml.internal.bind.v2.runtime.reflect.Accessor;
  37 import com.sun.xml.internal.bind.v2.runtime.reflect.TransducedAccessor;
  38 
  39 import org.xml.sax.Attributes;
  40 import org.xml.sax.SAXException;
  41 
  42 public final class LeafPropertyXsiLoader extends Loader {
  43 
  44     private final Loader defaultLoader;
  45     private final TransducedAccessor xacc;
  46     private final Accessor acc;
  47 
  48     public LeafPropertyXsiLoader(Loader defaultLoader, TransducedAccessor xacc, Accessor acc) {
  49         this.defaultLoader = defaultLoader;
  50         this.expectText = true;
  51         this.xacc = xacc;
  52         this.acc = acc;
  53     }
  54 
  55 
  56     @Override
  57     public void startElement(UnmarshallingContext.State state, TagName ea) throws SAXException {
  58         final Loader loader = selectLoader(state, ea);
  59         state.setLoader(loader);
  60         loader.startElement(state, ea);
  61     }
  62 
  63     protected Loader selectLoader(UnmarshallingContext.State state, TagName ea) throws SAXException {
  64 
  65         UnmarshallingContext context = state.getContext();
  66         JaxBeanInfo beanInfo = null;
  67 
  68         // look for @xsi:type
  69         Attributes atts = ea.atts;
  70         int idx = atts.getIndex(WellKnownNamespace.XML_SCHEMA_INSTANCE, "type");
  71 
  72         if (idx >= 0) {
  73             String value = atts.getValue(idx);
  74 
  75             QName type = DatatypeConverterImpl._parseQName(value, context);
  76 
  77             if (type == null)
  78                 return defaultLoader;
  79 
  80             beanInfo = context.getJAXBContext().getGlobalType(type);
  81             if (beanInfo == null)
  82                 return defaultLoader;
  83             ClassBeanInfoImpl cbii;
  84             try {
  85                 cbii = (ClassBeanInfoImpl) beanInfo;
  86             } catch (ClassCastException cce) {
  87                 return defaultLoader;
  88             }
  89 
  90             if (null == cbii.getTransducer()) {
  91                 return defaultLoader;
  92             }
  93 
  94             return new LeafPropertyLoader(
  95                     new TransducedAccessor.CompositeTransducedAccessorImpl(
  96                             state.getContext().getJAXBContext(),
  97                             cbii.getTransducer(),
  98                             acc));
  99         }
 100 
 101         return defaultLoader;
 102     }
 103 
 104     @Override
 105     public Collection<QName> getExpectedChildElements() {
 106         return defaultLoader.getExpectedChildElements();
 107     }
 108 
 109     @Override
 110     public Collection<QName> getExpectedAttributes() {
 111         return defaultLoader.getExpectedAttributes();
 112     }
 113 }