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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// 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.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
import java.util.RandomAccess;
/**
* 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 Object getRaw(int index) {
return list.getRaw(index);
}
@Override
public int size() {
return list.size();
}
@Override
public ByteString getByteString(int index) {
return list.getByteString(index);
}
@Override
public void add(ByteString element) {
throw new UnsupportedOperationException();
}
@Override
public void set(int index, ByteString element) {
throw new UnsupportedOperationException();
}
@Override
public boolean addAllByteString(Collection<? extends ByteString> element) {
throw new UnsupportedOperationException();
}
@Override
public byte[] getByteArray(int index) {
return list.getByteArray(index);
}
@Override
public void add(byte[] element) {
throw new UnsupportedOperationException();
}
@Override
public void set(int index, byte[] element) {
throw new UnsupportedOperationException();
}
@Override
public boolean addAllByteArray(Collection<byte[]> element) {
throw new UnsupportedOperationException();
}
@Override
public ListIterator<String> listIterator(final int index) {
return new ListIterator<String>() {
ListIterator<String> iter = list.listIterator(index);
@Override
public boolean hasNext() {
return iter.hasNext();
}
@Override
public String next() {
return iter.next();
}
@Override
public boolean hasPrevious() {
return iter.hasPrevious();
}
@Override
public String previous() {
return iter.previous();
}
@Override
public int nextIndex() {
return iter.nextIndex();
}
@Override
public int previousIndex() {
return iter.previousIndex();
}
@Override
public void remove() {
throw new UnsupportedOperationException();
}
@Override
public void set(String o) {
throw new UnsupportedOperationException();
}
@Override
public void add(String o) {
throw new UnsupportedOperationException();
}
};
}
@Override
public Iterator<String> iterator() {
return new Iterator<String>() {
Iterator<String> iter = list.iterator();
@Override
public boolean hasNext() {
return iter.hasNext();
}
@Override
public String next() {
return iter.next();
}
@Override
public void remove() {
throw new UnsupportedOperationException();
}
};
}
@Override
public List<?> getUnderlyingElements() {
// The returned value is already unmodifiable.
return list.getUnderlyingElements();
}
@Override
public void mergeFrom(LazyStringList other) {
throw new UnsupportedOperationException();
}
@Override
public List<byte[]> asByteArrayList() {
return Collections.unmodifiableList(list.asByteArrayList());
}
@Override
public List<ByteString> asByteStringList() {
return Collections.unmodifiableList(list.asByteStringList());
}
@Override
public LazyStringList getUnmodifiableView() {
return this;
}
}
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