| // Protocol Buffers - Google's data interchange format |
| // Copyright 2008 Google Inc. All rights reserved. |
| // http://code.google.com/p/protobuf/ |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * 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. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS 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 THE COPYRIGHT |
| // OWNER OR 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. |
| |
| package com.google.protobuf; |
| |
| import java.util.AbstractList; |
| import java.util.RandomAccess; |
| import java.util.List; |
| import java.util.ListIterator; |
| import java.util.Iterator; |
| |
| /** |
| * An implementation of {@link LazyStringList} that wraps another |
| * {@link LazyStringList} such that it cannot be modified via the wrapper. |
| * |
| * @author jonp@google.com (Jon Perlow) |
| */ |
| public class UnmodifiableLazyStringList extends AbstractList<String> |
| implements LazyStringList, RandomAccess { |
| |
| private final LazyStringList list; |
| |
| public UnmodifiableLazyStringList(LazyStringList list) { |
| this.list = list; |
| } |
| |
| @Override |
| public String get(int index) { |
| return list.get(index); |
| } |
| |
| @Override |
| public int size() { |
| return list.size(); |
| } |
| |
| //@Override (Java 1.6 override semantics, but we must support 1.5) |
| public ByteString getByteString(int index) { |
| return list.getByteString(index); |
| } |
| |
| //@Override (Java 1.6 override semantics, but we must support 1.5) |
| public void add(ByteString element) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| //@Override (Java 1.6 override semantics, but we must support 1.5) |
| public ListIterator<String> listIterator(final int index) { |
| return new ListIterator<String>() { |
| ListIterator<String> iter = list.listIterator(index); |
| |
| //@Override (Java 1.6 override semantics, but we must support 1.5) |
| public boolean hasNext() { |
| return iter.hasNext(); |
| } |
| |
| //@Override (Java 1.6 override semantics, but we must support 1.5) |
| public String next() { |
| return iter.next(); |
| } |
| |
| //@Override (Java 1.6 override semantics, but we must support 1.5) |
| public boolean hasPrevious() { |
| return iter.hasPrevious(); |
| } |
| |
| //@Override (Java 1.6 override semantics, but we must support 1.5) |
| public String previous() { |
| return iter.previous(); |
| } |
| |
| //@Override (Java 1.6 override semantics, but we must support 1.5) |
| public int nextIndex() { |
| return iter.nextIndex(); |
| } |
| |
| //@Override (Java 1.6 override semantics, but we must support 1.5) |
| public int previousIndex() { |
| return iter.previousIndex(); |
| } |
| |
| //@Override (Java 1.6 override semantics, but we must support 1.5) |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| //@Override (Java 1.6 override semantics, but we must support 1.5) |
| public void set(String o) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| //@Override (Java 1.6 override semantics, but we must support 1.5) |
| public void add(String o) { |
| throw new UnsupportedOperationException(); |
| } |
| }; |
| } |
| |
| @Override |
| public Iterator<String> iterator() { |
| return new Iterator<String>() { |
| Iterator<String> iter = list.iterator(); |
| |
| //@Override (Java 1.6 override semantics, but we must support 1.5) |
| public boolean hasNext() { |
| return iter.hasNext(); |
| } |
| |
| //@Override (Java 1.6 override semantics, but we must support 1.5) |
| public String next() { |
| return iter.next(); |
| } |
| |
| //@Override (Java 1.6 override semantics, but we must support 1.5) |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| }; |
| } |
| |
| @Override |
| public List<?> getUnderlyingElements() { |
| // The returned value is already unmodifiable. |
| return list.getUnderlyingElements(); |
| } |
| } |