001: /*
002: * Copyright (c) 2001-2004 Caucho Technology, Inc. All rights reserved.
003: *
004: * The Apache Software License, Version 1.1
005: *
006: * Redistribution and use in source and binary forms, with or without
007: * modification, are permitted provided that the following conditions
008: * are met:
009: *
010: * 1. Redistributions of source code must retain the above copyright
011: * notice, this list of conditions and the following disclaimer.
012: *
013: * 2. Redistributions in binary form must reproduce the above copyright
014: * notice, this list of conditions and the following disclaimer in
015: * the documentation and/or other materials provided with the
016: * distribution.
017: *
018: * 3. The end-user documentation included with the redistribution, if
019: * any, must include the following acknowlegement:
020: * "This product includes software developed by the
021: * Caucho Technology (http://www.caucho.com/)."
022: * Alternately, this acknowlegement may appear in the software itself,
023: * if and wherever such third-party acknowlegements normally appear.
024: *
025: * 4. The names "Hessian", "Resin", and "Caucho" must not be used to
026: * endorse or promote products derived from this software without prior
027: * written permission. For written permission, please contact
028: * info@caucho.com.
029: *
030: * 5. Products derived from this software may not be called "Resin"
031: * nor may "Resin" appear in their names without prior written
032: * permission of Caucho Technology.
033: *
034: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
035: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
036: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
037: * DISCLAIMED. IN NO EVENT SHALL CAUCHO TECHNOLOGY OR ITS CONTRIBUTORS
038: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
039: * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
040: * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
041: * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
042: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
043: * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
044: * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
045: *
046: * @author Scott Ferguson
047: */
048:
049: package com.caucho.hessian.io;
050:
051: import java.io.IOException;
052: import java.util.*;
053: import java.lang.reflect.*;
054:
055: /**
056: * Deserializing a JDK 1.2 Map.
057: */
058: public class MapDeserializer extends AbstractMapDeserializer {
059: private Class _type;
060: private Constructor _ctor;
061:
062: public MapDeserializer(Class type) {
063: if (type == null)
064: type = HashMap.class;
065:
066: _type = type;
067:
068: Constructor[] ctors = type.getConstructors();
069: for (int i = 0; i < ctors.length; i++) {
070: if (ctors[i].getParameterTypes().length == 0)
071: _ctor = ctors[i];
072: }
073:
074: if (_ctor == null) {
075: try {
076: _ctor = HashMap.class.getConstructor(new Class[0]);
077: } catch (Exception e) {
078: throw new IllegalStateException(e);
079: }
080: }
081: }
082:
083: public Class getType() {
084: if (_type != null)
085: return _type;
086: else
087: return HashMap.class;
088: }
089:
090: public Object readMap(AbstractHessianInput in) throws IOException {
091: Map map;
092:
093: if (_type == null)
094: map = new HashMap();
095: else if (_type.equals(Map.class))
096: map = new HashMap();
097: else if (_type.equals(SortedMap.class))
098: map = new TreeMap();
099: else {
100: try {
101: map = (Map) _ctor.newInstance();
102: } catch (Exception e) {
103: throw new IOExceptionWrapper(e);
104: }
105: }
106:
107: in.addRef(map);
108:
109: while (!in.isEnd()) {
110: map.put(in.readObject(), in.readObject());
111: }
112:
113: in.readEnd();
114:
115: return map;
116: }
117:
118: @Override
119: public Object readObject(AbstractHessianInput in,
120: String[] fieldNames) throws IOException {
121: Map map = createMap();
122:
123: int ref = in.addRef(map);
124:
125: for (int i = 0; i < fieldNames.length; i++) {
126: String name = fieldNames[i];
127:
128: map.put(name, in.readObject());
129: }
130:
131: return map;
132: }
133:
134: private Map createMap() throws IOException {
135:
136: if (_type == null)
137: return new HashMap();
138: else if (_type.equals(Map.class))
139: return new HashMap();
140: else if (_type.equals(SortedMap.class))
141: return new TreeMap();
142: else {
143: try {
144: return (Map) _ctor.newInstance();
145: } catch (Exception e) {
146: throw new IOExceptionWrapper(e);
147: }
148: }
149: }
150: }
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