| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package flex.messaging.io.amf.translator.decoder; |
| |
| import flex.messaging.io.SerializationContext; |
| |
| import java.util.Calendar; |
| import java.util.Date; |
| |
| /** |
| * Decode an ActionScript object (of some type) to a Java object (of some type). |
| * |
| * |
| */ |
| public abstract class ActionScriptDecoder |
| { |
| /** |
| * Does this type have a placeholder shell? |
| * @return boolean true if there is a placeholder shell |
| */ |
| public boolean hasShell() |
| { |
| return false; |
| } |
| |
| /** |
| * Used for calls only interested in creating a placeholder shell for a type. |
| * @param encodedObject the encoded object |
| * @param desiredClass the desired class for the decoded object |
| * @return Object the shell placeholder object |
| */ |
| public Object createShell(Object encodedObject, Class desiredClass) |
| { |
| return null; |
| } |
| |
| /** |
| * Used by calls to decode an object has a shell placeholder. |
| * @param shell the placeholder shell |
| * @param encodedObject the encoded object |
| * @param desiredClass the desired class for the decoded object |
| * @return Object the decoded object |
| */ |
| public abstract Object decodeObject(Object shell, Object encodedObject, Class desiredClass); |
| |
| /** |
| * Used by calls wanted to decode an object. If the decoder requires a place holder shell one is created |
| * and then the encodedObject is decoded to fill the object shell. |
| * @param encodedObject the encoded object |
| * @param desiredClass the desire class for the decoded object |
| * @return Object the decoded object |
| */ |
| public Object decodeObject(Object encodedObject, Class desiredClass) |
| { |
| Object shell = null; |
| |
| if (hasShell()) |
| { |
| shell = createShell(encodedObject, desiredClass); |
| } |
| |
| return decodeObject(shell, encodedObject, desiredClass); |
| } |
| |
| protected boolean canUseByReference(Object o) |
| { |
| if (o == null) |
| return false; |
| |
| else if (o instanceof String) |
| return false; |
| |
| else if (o instanceof Number) |
| return false; |
| |
| else if (o instanceof Boolean) |
| return false; |
| |
| else if (o instanceof Date) |
| { |
| return SerializationContext.getSerializationContext().supportDatesByReference; |
| } |
| |
| else if (o instanceof Calendar) |
| return false; |
| |
| else if (o instanceof Character) |
| return false; |
| |
| return true; |
| } |
| |
| protected static Object getDefaultPrimitiveValue(Class type) |
| { |
| if (type == Boolean.TYPE) |
| return Boolean.FALSE; |
| else if (type == Integer.TYPE) |
| return new Integer(0); |
| else if (type == Double.TYPE) |
| return new Double(0); |
| else if (type == Long.TYPE) |
| return new Long(0); |
| else if (type == Float.TYPE) |
| return new Float(0); |
| else if (type == Character.TYPE) |
| return new Character(Character.MIN_VALUE); |
| else if (type == Short.TYPE) |
| return new Short((short)0); |
| else if (type == Byte.TYPE) |
| return new Byte((byte)0); |
| |
| return null; |
| } |
| } |