| /* |
| * 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 |
| * info@caucho.com. |
| * |
| * 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.Constructor; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Modifier; |
| import java.util.HashMap; |
| |
| /** |
| * Serializing an object for known object types. |
| */ |
| public class BeanDeserializer extends AbstractMapDeserializer { |
| private Class _type; |
| private HashMap _methodMap; |
| private Method _readResolve; |
| private Constructor _constructor; |
| private Object[] _constructorArgs; |
| |
| public BeanDeserializer(Class cl) { |
| _type = cl; |
| _methodMap = getMethodMap(cl); |
| |
| _readResolve = getReadResolve(cl); |
| |
| Constructor[] constructors = cl.getConstructors(); |
| int bestLength = Integer.MAX_VALUE; |
| |
| for (int i = 0; i < constructors.length; i++) { |
| if (constructors[i].getParameterTypes().length < bestLength) { |
| _constructor = constructors[i]; |
| bestLength = _constructor.getParameterTypes().length; |
| } |
| } |
| |
| if (_constructor != null) { |
| _constructor.setAccessible(true); |
| Class[] params = _constructor.getParameterTypes(); |
| _constructorArgs = new Object[params.length]; |
| for (int i = 0; i < params.length; i++) { |
| _constructorArgs[i] = getParamArg(params[i]); |
| } |
| } |
| } |
| |
| /** |
| * Creates a map of the classes fields. |
| */ |
| protected static Object getParamArg(Class cl) { |
| if (!cl.isPrimitive()) |
| return null; |
| else if (boolean.class.equals(cl)) |
| return Boolean.FALSE; |
| else if (byte.class.equals(cl)) |
| return Byte.valueOf((byte) 0); |
| else if (short.class.equals(cl)) |
| return Short.valueOf((short) 0); |
| else if (char.class.equals(cl)) |
| return Character.valueOf((char) 0); |
| else if (int.class.equals(cl)) |
| return Integer.valueOf(0); |
| else if (long.class.equals(cl)) |
| return Long.valueOf(0); |
| else if (float.class.equals(cl)) |
| return Double.valueOf(0); |
| else if (double.class.equals(cl)) |
| return Double.valueOf(0); |
| else |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public Class getType() { |
| return _type; |
| } |
| |
| @Override |
| public Object readMap(AbstractHessianInput in) |
| throws IOException { |
| try { |
| Object obj = instantiate(); |
| |
| return readMap(in, obj); |
| } catch (IOException e) { |
| throw e; |
| } catch (Exception e) { |
| throw new IOExceptionWrapper(e); |
| } |
| } |
| |
| public Object readMap(AbstractHessianInput in, Object obj) |
| throws IOException { |
| try { |
| int ref = in.addRef(obj); |
| |
| while (!in.isEnd()) { |
| Object key = in.readObject(); |
| |
| Method method = (Method) _methodMap.get(key); |
| |
| if (method != null) { |
| Object value = in.readObject(method.getParameterTypes()[0]); |
| |
| method.invoke(obj, new Object[]{value}); |
| } else { |
| Object value = in.readObject(); |
| } |
| } |
| |
| in.readMapEnd(); |
| |
| Object resolve = resolve(obj); |
| |
| if (obj != resolve) |
| in.setRef(ref, resolve); |
| |
| return resolve; |
| } catch (IOException e) { |
| throw e; |
| } catch (Exception e) { |
| throw new IOExceptionWrapper(e); |
| } |
| } |
| |
| private Object resolve(Object obj) { |
| // if there's a readResolve method, call it |
| try { |
| if (_readResolve != null) |
| return _readResolve.invoke(obj, new Object[0]); |
| } catch (Exception e) { |
| } |
| |
| return obj; |
| } |
| |
| protected Object instantiate() |
| throws Exception { |
| return _constructor.newInstance(_constructorArgs); |
| } |
| |
| /** |
| * Returns the readResolve method |
| */ |
| protected Method getReadResolve(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("readResolve") && |
| method.getParameterTypes().length == 0) |
| return method; |
| } |
| } |
| |
| return null; |
| } |
| |
| /** |
| * Creates a map of the classes fields. |
| */ |
| protected HashMap getMethodMap(Class cl) { |
| HashMap methodMap = new HashMap(); |
| |
| for (; cl != null; cl = cl.getSuperclass()) { |
| Method[] methods = cl.getDeclaredMethods(); |
| |
| for (int i = 0; i < methods.length; i++) { |
| Method method = methods[i]; |
| |
| if (Modifier.isStatic(method.getModifiers())) |
| continue; |
| |
| String name = method.getName(); |
| |
| if (!name.startsWith("set")) |
| continue; |
| |
| Class[] paramTypes = method.getParameterTypes(); |
| if (paramTypes.length != 1) |
| continue; |
| |
| if (!method.getReturnType().equals(void.class)) |
| continue; |
| |
| if (findGetter(methods, name, paramTypes[0]) == null) |
| continue; |
| |
| // XXX: could parameterize the handler to only deal with public |
| try { |
| method.setAccessible(true); |
| } catch (Throwable e) { |
| e.printStackTrace(); |
| } |
| |
| name = name.substring(3); |
| |
| int j = 0; |
| for (; j < name.length() && Character.isUpperCase(name.charAt(j)); j++) { |
| } |
| |
| if (j == 1) |
| name = name.substring(0, j).toLowerCase() + name.substring(j); |
| else if (j > 1) |
| name = name.substring(0, j - 1).toLowerCase() + name.substring(j - 1); |
| |
| |
| methodMap.put(name, method); |
| } |
| } |
| |
| return methodMap; |
| } |
| |
| /** |
| * Finds any matching setter. |
| */ |
| private Method findGetter(Method[] methods, String setterName, Class arg) { |
| String getterName = "get" + setterName.substring(3); |
| |
| for (int i = 0; i < methods.length; i++) { |
| Method method = methods[i]; |
| |
| if (!method.getName().equals(getterName)) |
| continue; |
| |
| if (!method.getReturnType().equals(arg)) |
| continue; |
| |
| Class[] params = method.getParameterTypes(); |
| |
| if (params.length == 0) |
| return method; |
| } |
| |
| return null; |
| } |
| } |