001: /*
002: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003: *
004: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005: *
006: * The contents of this file are subject to the terms of either the GNU
007: * General Public License Version 2 only ("GPL") or the Common Development
008: * and Distribution License("CDDL") (collectively, the "License"). You
009: * may not use this file except in compliance with the License. You can obtain
010: * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
011: * or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
012: * language governing permissions and limitations under the License.
013: *
014: * When distributing the software, include this License Header Notice in each
015: * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
016: * Sun designates this particular file as subject to the "Classpath" exception
017: * as provided by Sun in the GPL Version 2 section of the License file that
018: * accompanied this code. If applicable, add the following below the License
019: * Header, with the fields enclosed by brackets [] replaced by your own
020: * identifying information: "Portions Copyrighted [year]
021: * [name of copyright owner]"
022: *
023: * Contributor(s):
024: *
025: * If you wish your version of this file to be governed by only the CDDL or
026: * only the GPL Version 2, indicate your decision by adding "[Contributor]
027: * elects to include this software in this distribution under the [CDDL or GPL
028: * Version 2] license." If you don't indicate a single choice of license, a
029: * recipient has the option to distribute your version of this file under
030: * either the CDDL, the GPL Version 2 or to extend the choice of license to
031: * its licensees as provided above. However, if you add GPL Version 2 code
032: * and therefore, elected the GPL Version 2 license, then the option applies
033: * only if the new code is made subject to such option by the copyright
034: * holder.
035: */
036:
037: package com.sun.xml.bind.v2.runtime.unmarshaller;
038:
039: import com.sun.xml.bind.DatatypeConverterImpl;
040: import com.sun.xml.bind.api.AccessorException;
041: import com.sun.xml.bind.v2.WellKnownNamespace;
042: import com.sun.xml.bind.v2.runtime.reflect.Accessor;
043:
044: import org.xml.sax.SAXException;
045:
046: /**
047: * Looks for xsi:nil='true' and sets the target to null.
048: * Otherwise delegate to another handler.
049: *
050: * @author Kohsuke Kawaguchi
051: */
052: public class XsiNilLoader extends ProxyLoader {
053:
054: private final Loader defaultLoader;
055:
056: public XsiNilLoader(Loader defaultLoader) {
057: this .defaultLoader = defaultLoader;
058: assert defaultLoader != null;
059: }
060:
061: protected Loader selectLoader(UnmarshallingContext.State state,
062: TagName ea) throws SAXException {
063: int idx = ea.atts.getIndex(
064: WellKnownNamespace.XML_SCHEMA_INSTANCE, "nil");
065:
066: if (idx != -1) {
067: String value = ea.atts.getValue(idx);
068: if (DatatypeConverterImpl._parseBoolean(value)) {
069: onNil(state);
070: return Discarder.INSTANCE;
071: }
072: }
073:
074: return defaultLoader;
075: }
076:
077: /**
078: * Called when xsi:nil='true' was found.
079: */
080: protected void onNil(UnmarshallingContext.State state)
081: throws SAXException {
082: }
083:
084: public static final class Single extends XsiNilLoader {
085: private final Accessor acc;
086:
087: public Single(Loader l, Accessor acc) {
088: super (l);
089: this .acc = acc;
090: }
091:
092: protected void onNil(UnmarshallingContext.State state)
093: throws SAXException {
094: try {
095: acc.set(state.prev.target, null);
096: } catch (AccessorException e) {
097: handleGenericException(e, true);
098: }
099: }
100: }
101:
102: public static final class Array extends XsiNilLoader {
103: public Array(Loader core) {
104: super (core);
105: }
106:
107: protected void onNil(UnmarshallingContext.State state) {
108: // let the receiver add this to the lister
109: state.target = null;
110: }
111: }
112: }
|