156ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson/* 256ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson * Copyright (C) 2010 Google Inc. 356ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson * 456ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson * Licensed under the Apache License, Version 2.0 (the "License"); 556ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson * you may not use this file except in compliance with the License. 656ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson * You may obtain a copy of the License at 756ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson * 856ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson * http://www.apache.org/licenses/LICENSE-2.0 956ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson * 1056ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson * Unless required by applicable law or agreed to in writing, software 1156ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson * distributed under the License is distributed on an "AS IS" BASIS, 1256ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1356ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson * See the License for the specific language governing permissions and 1456ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson * limitations under the License. 1556ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson */ 1656ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson 1756ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodsonpackage com.google.clearsilver.jsilver.data; 1856ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson 1956ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodsonimport com.google.clearsilver.jsilver.autoescape.EscapeMode; 2056ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson 2156ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodsonimport java.util.Iterator; 2256ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson 2356ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson/** 2456ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson * Data wrapper that prevents modifying the delegated Data node or its tree. 2556ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson */ 2656ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodsonpublic class UnmodifiableData extends DelegatedData { 2756ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson 2856ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson private static final String MODIFICATION_ERROR_MSG = "Cannot modify this Data object."; 2956ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson 3056ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson public UnmodifiableData(Data delegate) { 3156ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson super(delegate); 3256ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson } 3356ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson 3456ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson @Override 3556ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson protected DelegatedData newInstance(Data newDelegate) { 3656ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson return newDelegate == null ? null : new UnmodifiableData(newDelegate); 3756ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson } 3856ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson 3956ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson @Override 4056ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson public void copy(Data from) { 4156ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson throw new UnsupportedOperationException(MODIFICATION_ERROR_MSG); 4256ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson } 4356ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson 4456ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson @Override 4556ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson public void copy(String toPath, Data from) { 4656ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson throw new UnsupportedOperationException(MODIFICATION_ERROR_MSG); 4756ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson } 4856ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson 4956ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson /** 5056ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson * {@link #createChild} calls {@link #getChild} and throws {@link UnsupportedOperationException} 5156ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson * if no object was found. 5256ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson */ 5356ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson @Override 5456ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson public Data createChild(String path) { 5556ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson // Check if child already exists 5656ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson Data child = getChild(path); 5756ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson 5856ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson if (child == null) { 5956ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson // If the child described by path does not exist we throw 6056ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson // an exception as we cannot create a new one. 6156ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson throw new UnsupportedOperationException(MODIFICATION_ERROR_MSG); 6256ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson } 6356ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson return child; 6456ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson } 6556ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson 6656ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson protected class UnmodifiableIterator extends DelegatedIterator { 6756ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson UnmodifiableIterator(Iterator<? extends Data> iterator) { 6856ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson super(iterator); 6956ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson } 7056ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson 7156ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson public void remove() { 7256ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson throw new UnsupportedOperationException(MODIFICATION_ERROR_MSG); 7356ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson } 7456ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson } 7556ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson 7656ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson /** 7756ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson * Override in order to not allow modifying children with remove(). 7856ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson */ 7956ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson @Override 8056ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson protected Iterator<DelegatedData> newChildIterator() { 8156ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson return new UnmodifiableIterator(getDelegate().getChildren().iterator()); 8256ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson } 8356ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson 8456ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson // Below we disable modification operations. 8556ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson 8656ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson @Override 8756ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson public void setSymlink(String sourcePath, Data destination) { 8856ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson throw new UnsupportedOperationException(MODIFICATION_ERROR_MSG); 8956ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson } 9056ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson 9156ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson @Override 9256ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson public void setSymlink(String sourcePath, String destinationPath) { 9356ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson throw new UnsupportedOperationException(MODIFICATION_ERROR_MSG); 9456ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson } 9556ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson 9656ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson @Override 9756ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson public void setSymlink(Data symLink) { 9856ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson throw new UnsupportedOperationException(MODIFICATION_ERROR_MSG); 9956ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson } 10056ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson 10156ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson @Override 10256ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson public void setAttribute(String key, String value) { 10356ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson throw new UnsupportedOperationException(MODIFICATION_ERROR_MSG); 10456ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson } 10556ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson 10656ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson @Override 10756ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson public void removeTree(String path) { 10856ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson throw new UnsupportedOperationException(MODIFICATION_ERROR_MSG); 10956ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson } 11056ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson 11156ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson @Override 11256ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson public void setValue(String path, String value) { 11356ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson throw new UnsupportedOperationException(MODIFICATION_ERROR_MSG); 11456ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson } 11556ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson 11656ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson @Override 11756ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson public void setValue(String value) { 11856ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson throw new UnsupportedOperationException(MODIFICATION_ERROR_MSG); 11956ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson } 12056ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson 12156ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson @Override 12256ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson public void setEscapeMode(EscapeMode mode) { 12356ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson throw new UnsupportedOperationException(MODIFICATION_ERROR_MSG); 12456ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson } 12556ed4167b942ec265f9cee70ac4d71d10b3835ceBen Dodson} 126