| /* |
| * 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.amf.translator.TranslationException; |
| |
| import java.lang.reflect.Array; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Set; |
| import java.util.SortedSet; |
| import java.util.TreeSet; |
| |
| /** |
| * Decodes a java.lang.reflect.Array, java.util.Collection, |
| * java.lang.String (using toCharArray), to a java.util.Collection |
| * instance. |
| * <p> |
| * If the desired Collection class is an interface then an instance |
| * of a standard implementation will be created. |
| * </p> |
| * <p> |
| * If java.util.SortedSet is desired, then a java.util.TreeSet will be created. |
| * </p> |
| * <p> |
| * If a java.util.Set is desired, then a java.util.HashSet will be created. |
| * </p> |
| * <p> |
| * If a java.util.List is desired, then a java.util.ArrayList will be created. |
| * </p> |
| * <p> |
| * If a java.util.Collection is desired, then a java.util.ArrayList will be created. |
| * </p> |
| * |
| * @see java.util.Collection |
| */ |
| public class CollectionDecoder extends ActionScriptDecoder { |
| public boolean hasShell() { |
| return true; |
| } |
| |
| protected boolean isSuitableCollection(Object encodedObject, Class desiredClass) { |
| return (encodedObject instanceof Collection && desiredClass.isAssignableFrom(encodedObject.getClass())); |
| } |
| |
| public Object createShell(Object encodedObject, Class desiredClass) { |
| Collection col = null; |
| |
| try { |
| if (encodedObject != null) { |
| if (isSuitableCollection(encodedObject, desiredClass)) { |
| col = (Collection) encodedObject; |
| } else { |
| if (desiredClass.isInterface()) { |
| if (List.class.isAssignableFrom(desiredClass)) { |
| col = new ArrayList(); |
| } else if (SortedSet.class.isAssignableFrom(desiredClass)) { |
| col = new TreeSet(); |
| } else if (Set.class.isAssignableFrom(desiredClass)) { |
| col = new HashSet(); |
| } else if (Collection.class.isAssignableFrom(desiredClass)) { |
| col = new ArrayList(); |
| } |
| } else { |
| col = (Collection) desiredClass.newInstance(); |
| } |
| } |
| } else { |
| col = (Collection) desiredClass.newInstance(); |
| } |
| } catch (Exception e) { |
| TranslationException ex = new TranslationException("Could not create Collection " + desiredClass, e); |
| ex.setCode("Server.Processing"); |
| throw ex; |
| } |
| |
| if (col == null) { |
| DecoderFactory.invalidType(encodedObject, desiredClass); |
| } |
| |
| return col; |
| } |
| |
| public Object decodeObject(Object shell, Object encodedObject, Class desiredClass) { |
| if (shell == null || encodedObject == null) |
| return null; |
| |
| // Don't decode if we already have a suitable Collection. |
| if (isSuitableCollection(encodedObject, desiredClass)) { |
| return encodedObject; |
| } |
| |
| return decodeCollection((Collection) shell, encodedObject); |
| } |
| |
| protected Collection decodeCollection(Collection collectionShell, Object encodedObject) { |
| Object obj = null; |
| |
| if (encodedObject instanceof String) { |
| encodedObject = ((String) encodedObject).toCharArray(); |
| } else if (encodedObject instanceof Collection) { |
| encodedObject = ((Collection) encodedObject).toArray(); |
| } |
| |
| int len = Array.getLength(encodedObject); |
| |
| for (int i = 0; i < len; i++) { |
| obj = Array.get(encodedObject, i); |
| collectionShell.add(obj); |
| } |
| |
| return collectionShell; |
| } |
| } |