/*
* Copyright (c) 2008-2014 MongoDB, Inc.
*
* Licensed 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 org.bson;
import java.util.Collection;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
import java.util.NoSuchElementException;
import java.util.Set;
/**
* A {@code LazyBSONObject} representing a BSON array.
*/
@SuppressWarnings("rawtypes")
public class LazyBSONList extends LazyBSONObject implements List {
/**
* Construct an instance with the given raw bytes and offset.
*
* @param bytes the raw BSON bytes
* @param callback the callback to use to create nested values
*/
public LazyBSONList(final byte[] bytes, final LazyBSONCallback callback) {
super(bytes, callback);
}
/**
* Construct an instance with the given raw bytes and offset.
*
* @param bytes the raw BSON bytes
* @param offset the offset into the raw bytes
* @param callback the callback to use to create nested values
*/
public LazyBSONList(final byte[] bytes, final int offset, final LazyBSONCallback callback) {
super(bytes, offset, callback);
}
@Override
public int size() {
return keySet().size();
}
@Override
public boolean contains(final Object o) {
return indexOf(o) > -1;
}
@Override
public Iterator iterator() {
return new LazyBSONListIterator();
}
@Override
public boolean containsAll(final Collection collection) {
Set<Object> values = new HashSet<Object>();
for (final Object o : this) {
values.add(o);
}
return values.containsAll(collection);
}
@Override
public Object get(final int index) {
return get(String.valueOf(index));
}
@Override
public int indexOf(final Object o) {
Iterator it = iterator();
for (int pos = 0; it.hasNext(); pos++) {
if (o.equals(it.next())) {
return pos;
}
}
return -1;
}
@Override
public int lastIndexOf(final Object o) {
int lastFound = -1;
Iterator it = iterator();
for (int pos = 0; it.hasNext(); pos++) {
if (o.equals(it.next())) {
lastFound = pos;
}
}
return lastFound;
}
/**
* An iterator over the values in a LazyBsonList.
*/
public class LazyBSONListIterator implements Iterator {
private final BsonBinaryReader reader;
private BsonType cachedBsonType;
/**
* Construct an instance
*/
public LazyBSONListIterator() {
reader = getBsonReader();
reader.readStartDocument();
}
@Override
public boolean hasNext() {
if (cachedBsonType == null) {
cachedBsonType = reader.readBsonType();
}
return cachedBsonType != BsonType.END_OF_DOCUMENT;
}
@Override
public Object next() {
if (!hasNext()) {
throw new NoSuchElementException();
} else {
cachedBsonType = null;
reader.readName();
return readValue(reader);
}
}
@Override
public void remove() {
throw new UnsupportedOperationException("Operation is not supported");
}
}
/* ----------------- Unsupported operations --------------------- */
@Override
public ListIterator listIterator() {
throw new UnsupportedOperationException("Operation is not supported instance of this type");
}
@Override
public ListIterator listIterator(final int index) {
throw new UnsupportedOperationException("Operation is not supported instance of this type");
}
@Override
public boolean add(final Object o) {
throw new UnsupportedOperationException("Object is read only");
}
@Override
public boolean remove(final Object o) {
throw new UnsupportedOperationException("Object is read only");
}
@Override
public boolean addAll(final Collection c) {
throw new UnsupportedOperationException("Object is read only");
}
@Override
public boolean addAll(final int index, final Collection c) {
throw new UnsupportedOperationException("Object is read only");
}
@Override
public boolean removeAll(final Collection c) {
throw new UnsupportedOperationException("Object is read only");
}
@Override
public boolean retainAll(final Collection c) {
throw new UnsupportedOperationException("Object is read only");
}
@Override
public void clear() {
throw new UnsupportedOperationException("Object is read only");
}
@Override
public Object set(final int index, final Object element) {
throw new UnsupportedOperationException("Object is read only");
}
@Override
public void add(final int index, final Object element) {
throw new UnsupportedOperationException("Object is read only");
}
@Override
public Object remove(final int index) {
throw new UnsupportedOperationException("Object is read only");
}
@Override
public List subList(final int fromIndex, final int toIndex) {
throw new UnsupportedOperationException("Operation is not supported");
}
@Override
public Object[] toArray() {
throw new UnsupportedOperationException("Operation is not supported");
}
@Override
public Object[] toArray(final Object[] a) {
throw new UnsupportedOperationException("Operation is not supported");
}
}