/* * Copyright (c) 2001-2008 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.lang.reflect.Field; import java.lang.reflect.Method; import java.lang.reflect.Modifier; import java.util.ArrayList; import java.util.Collections; import java.util.List; import java.util.logging.Level; import java.util.logging.Logger; /** * Serializing an object for known object types. */ public class JavaSerializer extends AbstractSerializer { private static final Logger log = Logger.getLogger(JavaSerializer.class.getName()); private static Object[] NULL_ARGS = new Object[0]; private Field[] _fields; private FieldSerializer[] _fieldSerializers; private Object _writeReplaceFactory; private Method _writeReplace; public JavaSerializer(Class cl, ClassLoader loader) { introspectWriteReplace(cl, loader); if (_writeReplace != null) _writeReplace.setAccessible(true); List primitiveFields = new ArrayList(); List compoundFields = new ArrayList(); 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); if (field.getType().isPrimitive() || (field.getType().getName().startsWith("java.lang.") && !field.getType().equals(Object.class))) primitiveFields.add(field); else compoundFields.add(field); } } List fields = new ArrayList(); fields.addAll(primitiveFields); fields.addAll(compoundFields); Collections.reverse(fields); _fields = new Field[fields.size()]; fields.toArray(_fields); _fieldSerializers = new FieldSerializer[_fields.length]; for (int i = 0; i < _fields.length; i++) { _fieldSerializers[i] = getFieldSerializer(_fields[i].getType()); } } /** * Returns the writeReplace method */ protected static Method getWriteReplace(Class cl) { for (; cl != null; cl = cl.getSuperclass()) { Method[] methods = cl.getDeclaredMethods(); for (int i = 0; i < methods.length; i++) { Method method = methods[i]; if (method.getName().equals("writeReplace") && method.getParameterTypes().length == 0) return method; } } return null; } private static FieldSerializer getFieldSerializer(Class type) { if (int.class.equals(type) || byte.class.equals(type) || short.class.equals(type) || int.class.equals(type)) { return IntFieldSerializer.SER; } else if (long.class.equals(type)) { return LongFieldSerializer.SER; } else if (double.class.equals(type) || float.class.equals(type)) { return DoubleFieldSerializer.SER; } else if (boolean.class.equals(type)) { return BooleanFieldSerializer.SER; } else if (String.class.equals(type)) { return StringFieldSerializer.SER; } else if (java.util.Date.class.equals(type) || java.sql.Date.class.equals(type) || java.sql.Timestamp.class.equals(type) || java.sql.Time.class.equals(type)) { return DateFieldSerializer.SER; } else return FieldSerializer.SER; } private void introspectWriteReplace(Class cl, ClassLoader loader) { try { String className = cl.getName() + "HessianSerializer"; Class serializerClass = Class.forName(className, false, loader); Object serializerObject = serializerClass.newInstance(); Method writeReplace = getWriteReplace(serializerClass, cl); if (writeReplace != null) { _writeReplaceFactory = serializerObject; _writeReplace = writeReplace; return; } } catch (ClassNotFoundException e) { } catch (Exception e) { log.log(Level.FINER, e.toString(), e); } _writeReplace = getWriteReplace(cl); } /** * Returns the writeReplace method */ protected Method getWriteReplace(Class cl, Class param) { for (; cl != null; cl = cl.getSuperclass()) { for (Method method : cl.getDeclaredMethods()) { if (method.getName().equals("writeReplace") && method.getParameterTypes().length == 1 && param.equals(method.getParameterTypes()[0])) return method; } } return null; } @Override public void writeObject(Object obj, AbstractHessianOutput out) throws IOException { if (out.addRef(obj)) { return; } Class cl = obj.getClass(); try { if (_writeReplace != null) { Object repl; if (_writeReplaceFactory != null) repl = _writeReplace.invoke(_writeReplaceFactory, obj); else repl = _writeReplace.invoke(obj); //Some class would return itself for wrapReplace, which would cause infinite recursion //In this case, we could write the object just like normal cases if (repl != obj) { out.removeRef(obj); out.writeObject(repl); out.replaceRef(repl, obj); return; } } } catch (RuntimeException e) { throw e; } catch (Exception e) { // log.log(Level.FINE, e.toString(), e); throw new RuntimeException(e); } int ref = out.writeObjectBegin(cl.getName()); if (ref < -1) { writeObject10(obj, out); } else { if (ref == -1) { writeDefinition20(out); out.writeObjectBegin(cl.getName()); } writeInstance(obj, out); } } private void writeObject10(Object obj, AbstractHessianOutput out) throws IOException { for (int i = 0; i < _fields.length; i++) { Field field = _fields[i]; out.writeString(field.getName()); _fieldSerializers[i].serialize(out, obj, field); } out.writeMapEnd(); } private void writeDefinition20(AbstractHessianOutput out) throws IOException { out.writeClassFieldLength(_fields.length); for (int i = 0; i < _fields.length; i++) { Field field = _fields[i]; out.writeString(field.getName()); } } public void writeInstance(Object obj, AbstractHessianOutput out) throws IOException { for (int i = 0; i < _fields.length; i++) { Field field = _fields[i]; _fieldSerializers[i].serialize(out, obj, field); } } static class FieldSerializer { static final FieldSerializer SER = new FieldSerializer(); void serialize(AbstractHessianOutput out, Object obj, Field field) throws IOException { Object value = null; try { value = field.get(obj); } catch (IllegalAccessException e) { log.log(Level.FINE, e.toString(), e); } try { out.writeObject(value); } catch (RuntimeException e) { throw new RuntimeException(e.getMessage() + "\n Java field: " + field, e); } catch (IOException e) { throw new IOExceptionWrapper(e.getMessage() + "\n Java field: " + field, e); } } } static class BooleanFieldSerializer extends FieldSerializer { static final FieldSerializer SER = new BooleanFieldSerializer(); @Override void serialize(AbstractHessianOutput out, Object obj, Field field) throws IOException { boolean value = false; try { value = field.getBoolean(obj); } catch (IllegalAccessException e) { log.log(Level.FINE, e.toString(), e); } out.writeBoolean(value); } } static class IntFieldSerializer extends FieldSerializer { static final FieldSerializer SER = new IntFieldSerializer(); @Override void serialize(AbstractHessianOutput out, Object obj, Field field) throws IOException { int value = 0; try { value = field.getInt(obj); } catch (IllegalAccessException e) { log.log(Level.FINE, e.toString(), e); } out.writeInt(value); } } static class LongFieldSerializer extends FieldSerializer { static final FieldSerializer SER = new LongFieldSerializer(); @Override void serialize(AbstractHessianOutput out, Object obj, Field field) throws IOException { long value = 0; try { value = field.getLong(obj); } catch (IllegalAccessException e) { log.log(Level.FINE, e.toString(), e); } out.writeLong(value); } } static class DoubleFieldSerializer extends FieldSerializer { static final FieldSerializer SER = new DoubleFieldSerializer(); @Override void serialize(AbstractHessianOutput out, Object obj, Field field) throws IOException { double value = 0; try { value = field.getDouble(obj); } catch (IllegalAccessException e) { log.log(Level.FINE, e.toString(), e); } out.writeDouble(value); } } static class StringFieldSerializer extends FieldSerializer { static final FieldSerializer SER = new StringFieldSerializer(); @Override void serialize(AbstractHessianOutput out, Object obj, Field field) throws IOException { String value = null; try { value = (String) field.get(obj); } catch (IllegalAccessException e) { log.log(Level.FINE, e.toString(), e); } out.writeString(value); } } static class DateFieldSerializer extends FieldSerializer { static final FieldSerializer SER = new DateFieldSerializer(); @Override void serialize(AbstractHessianOutput out, Object obj, Field field) throws IOException { java.util.Date value = null; try { value = (java.util.Date) field.get(obj); } catch (IllegalAccessException e) { log.log(Level.FINE, e.toString(), e); } if (value == null) out.writeNull(); else out.writeUTCDate(value.getTime()); } } }