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/*
* Copyright (c) 2001-2004 Caucho Technology, Inc. All rights reserved.
*
* The Apache Software License, Version 1.1
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Caucho Technology (http://www.caucho.com/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "Burlap", "Resin", and "Caucho" must not be used to
* endorse or promote products derived from this software without prior
* written permission. For written permission, please contact
* [email protected].
*
* 5. Products derived from this software may not be called "Resin"
* nor may "Resin" appear in their names without prior written
* permission of Caucho Technology.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL CAUCHO TECHNOLOGY OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* @author Scott Ferguson
*/
package com.alibaba.com.caucho.hessian.io;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.HashMap;
/**
* Input stream for Hessian requests, deserializing objects using the
* java.io.Serialization protocol.
*
*
HessianSerializerInput is unbuffered, so any client needs to provide
* its own buffering.
*
*
Serialization
*
*
* InputStream is = new FileInputStream("test.xml");
* HessianOutput in = new HessianSerializerOutput(is);
*
* Object obj = in.readObject();
* is.close();
*
*
*
Parsing a Hessian reply
*
*
* InputStream is = ...; // from http connection
* HessianInput in = new HessianSerializerInput(is);
* String value;
*
* in.startReply(); // read reply header
* value = in.readString(); // read string value
* in.completeReply(); // read reply footer
*
*/
public class HessianSerializerInput extends HessianInput {
/**
* Creates a new Hessian input stream, initialized with an
* underlying input stream.
*
* @param is the underlying input stream.
*/
public HessianSerializerInput(InputStream is) {
super(is);
}
/**
* Creates an uninitialized Hessian input stream.
*/
public HessianSerializerInput() {
}
/**
* Reads an object from the input stream. cl is known not to be
* a Map.
*/
protected Object readObjectImpl(Class cl)
throws IOException {
try {
Object obj = cl.newInstance();
if (_refs == null)
_refs = new ArrayList();
_refs.add(obj);
HashMap fieldMap = getFieldMap(cl);
int code = read();
for (; code >= 0 && code != 'z'; code = read()) {
_peek = code;
Object key = readObject();
Field field = (Field) fieldMap.get(key);
if (field != null) {
Object value = readObject(field.getType());
field.set(obj, value);
} else {
Object value = readObject();
}
}
if (code != 'z')
throw expect("map", code);
// if there's a readResolve method, call it
try {
Method method = cl.getMethod("readResolve", new Class[0]);
return method.invoke(obj, new Object[0]);
} catch (Exception e) {
}
return obj;
} catch (IOException e) {
throw e;
} catch (Exception e) {
throw new IOExceptionWrapper(e);
}
}
/**
* Creates a map of the classes fields.
*/
protected HashMap getFieldMap(Class cl) {
HashMap fieldMap = new HashMap();
for (; cl != null; cl = cl.getSuperclass()) {
Field[] fields = cl.getDeclaredFields();
for (int i = 0; i < fields.length; i++) {
Field field = fields[i];
if (Modifier.isTransient(field.getModifiers()) ||
Modifier.isStatic(field.getModifiers()))
continue;
// XXX: could parameterize the handler to only deal with public
field.setAccessible(true);
fieldMap.put(field.getName(), field);
}
}
return fieldMap;
}
}