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A processor for parsing, validating, serializing and manipulating XML, written in Java
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/*
* 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 org.apache.xerces.impl.xs.util;
import java.lang.reflect.Array;
import java.util.AbstractList;
import org.apache.xerces.xs.datatypes.ObjectList;
/**
* Contains a list of Objects.
*
* @xerces.internal
*
* @version $Id$
*/
public final class ObjectListImpl extends AbstractList implements ObjectList {
/**
* An immutable empty list.
*/
public static final ObjectListImpl EMPTY_LIST = new ObjectListImpl(new Object[0], 0);
// The array to hold all data
private final Object[] fArray;
// Number of elements in this list
private final int fLength;
public ObjectListImpl(Object[] array, int length) {
fArray = array;
fLength = length;
}
public int getLength() {
return fLength;
}
public boolean contains(Object item) {
if (item == null) {
for (int i = 0; i < fLength; i++) {
if (fArray[i] == null)
return true;
}
}
else {
for (int i = 0; i < fLength; i++) {
if (item.equals(fArray[i]))
return true;
}
}
return false;
}
public Object item(int index) {
if (index < 0 || index >= fLength) {
return null;
}
return fArray[index];
}
/*
* List methods
*/
public Object get(int index) {
if (index >= 0 && index < fLength) {
return fArray[index];
}
throw new IndexOutOfBoundsException("Index: " + index);
}
public int size() {
return getLength();
}
public Object[] toArray() {
Object[] a = new Object[fLength];
toArray0(a);
return a;
}
public Object[] toArray(Object[] a) {
if (a.length < fLength) {
Class arrayClass = a.getClass();
Class componentType = arrayClass.getComponentType();
a = (Object[]) Array.newInstance(componentType, fLength);
}
toArray0(a);
if (a.length > fLength) {
a[fLength] = null;
}
return a;
}
private void toArray0(Object[] a) {
if (fLength > 0) {
System.arraycopy(fArray, 0, a, 0, fLength);
}
}
}