1 /*
2 * Copyright (c) 1997, 2010, 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.property;
27
28 import java.io.IOException;
29
30 import javax.xml.stream.XMLStreamException;
31
32 import com.sun.xml.internal.bind.api.AccessorException;
33 import com.sun.xml.internal.bind.v2.model.core.PropertyKind;
34 import com.sun.xml.internal.bind.v2.model.runtime.RuntimeElementPropertyInfo;
35 import com.sun.xml.internal.bind.v2.model.runtime.RuntimeTypeRef;
36 import com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl;
37 import com.sun.xml.internal.bind.v2.runtime.Name;
38 import com.sun.xml.internal.bind.v2.runtime.XMLSerializer;
39 import com.sun.xml.internal.bind.v2.runtime.reflect.Accessor;
40 import com.sun.xml.internal.bind.v2.runtime.reflect.TransducedAccessor;
41 import com.sun.xml.internal.bind.v2.runtime.unmarshaller.ChildLoader;
42 import com.sun.xml.internal.bind.v2.runtime.unmarshaller.DefaultValueLoaderDecorator;
43 import com.sun.xml.internal.bind.v2.runtime.unmarshaller.LeafPropertyLoader;
44 import com.sun.xml.internal.bind.v2.runtime.unmarshaller.LeafPropertyXsiLoader;
45 import com.sun.xml.internal.bind.v2.runtime.unmarshaller.Loader;
46 import com.sun.xml.internal.bind.v2.runtime.unmarshaller.XsiNilLoader;
47 import com.sun.xml.internal.bind.v2.util.QNameMap;
48
49 import org.xml.sax.SAXException;
50
51 /**
52 * {@link Property} that contains a leaf value.
53 *
54 * @author Kohsuke Kawaguchi (kk@kohsuke.org)
55 */
56 final class SingleElementLeafProperty<BeanT> extends PropertyImpl<BeanT> {
57
58 private final Name tagName;
59 private final boolean nillable;
60 private final Accessor acc;
61 private final String defaultValue;
62 private final TransducedAccessor<BeanT> xacc;
63 private final boolean improvedXsiTypeHandling;
64
65 public SingleElementLeafProperty(JAXBContextImpl context, RuntimeElementPropertyInfo prop) {
66 super(context, prop);
67 RuntimeTypeRef ref = prop.getTypes().get(0);
68 tagName = context.nameBuilder.createElementName(ref.getTagName());
69 assert tagName != null;
70 nillable = ref.isNillable();
71 defaultValue = ref.getDefaultValue();
72 this.acc = prop.getAccessor().optimize(context);
73
74 xacc = TransducedAccessor.get(context, ref);
75 assert xacc != null;
76
77 improvedXsiTypeHandling = context.improvedXsiTypeHandling;
78 }
79
80 public void reset(BeanT o) throws AccessorException {
81 acc.set(o, null);
82 }
83
84 public String getIdValue(BeanT bean) throws AccessorException, SAXException {
85 return xacc.print(bean).toString();
86 }
87
88 @Override
89 public void serializeBody(BeanT o, XMLSerializer w, Object outerPeer) throws SAXException, AccessorException, IOException, XMLStreamException {
90 boolean hasValue = xacc.hasValue(o);
91
92 Object obj = null;
93
94 try {
95 obj = acc.getUnadapted(o);
96 } catch (AccessorException ae) {
97 ; // noop
98 }
99
100 Class valueType = acc.getValueType();
101
102 // check for different type than expected. If found, add xsi:type declaration
103 if (improvedXsiTypeHandling && !acc.isAdapted() &&
104 (obj!=null) && ( !obj.getClass().equals(valueType))&&
105 (!valueType.isPrimitive() && acc.isValueTypeAbstractable() )) {
106
107 w.startElement(tagName, outerPeer);
108 w.childAsXsiType(obj, fieldName, w.grammar.getBeanInfo(valueType), nillable);
109 w.endElement();
110
111 } else { // current type is expected
112
113 if (hasValue) {
114 xacc.writeLeafElement(w, tagName, o, fieldName);
115 } else if (nillable) {
116 w.startElement(tagName, null);
117 w.writeXsiNilTrue();
118 w.endElement();
119 }
120 }
121 }
122
123 public void buildChildElementUnmarshallers(UnmarshallerChain chain, QNameMap<ChildLoader> handlers) {
124 Loader l = new LeafPropertyLoader(xacc);
125 if (defaultValue != null)
126 l = new DefaultValueLoaderDecorator(l, defaultValue);
127 if (nillable || chain.context.allNillable)
128 l = new XsiNilLoader.Single(l, acc);
129
130 // LeafPropertyXsiLoader doesn't work well with nillable elements
131 if (improvedXsiTypeHandling && !nillable)
132 l = new LeafPropertyXsiLoader(l, xacc, acc);
133
134 handlers.put(tagName, new ChildLoader(l, null));
135 }
136
137
138 public PropertyKind getKind() {
139 return PropertyKind.ELEMENT;
140 }
141
142 @Override
143 public Accessor getElementPropertyAccessor(String nsUri, String localName) {
144 if (tagName.equals(nsUri, localName))
145 return acc;
146 else
147 return null;
148 }
149 }