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package com.sun.org.apache.xerces.internal.impl.xs.util;
import java.lang.reflect.Array;
import java.util.AbstractList;
import java.util.Vector;
import com.sun.org.apache.xerces.internal.xs.StringList;
/**
* Containts a list of Object's.
*
* @xerces.internal
*
* @author Sandy Gao, IBM
*
* @version $Id: StringListImpl.java,v 1.7 2010-11-01 04:40:06 joehw Exp $
*/
public final class StringListImpl extends AbstractList implements StringList {
/**
* An immutable empty list.
*/
public static final StringListImpl EMPTY_LIST = new StringListImpl(new String[0], 0);
// The array to hold all data
private final String[] fArray;
// Number of elements in this list
private final int fLength;
// REVISIT: this is temp solution. In general we need to use this class
// instead of the Vector.
private final Vector fVector;
public StringListImpl(Vector v) {
fVector = v;
fLength = (v == null) ? 0 : v.size();
fArray = null;
}
/**
* Construct an XSObjectList implementation
*
* @param array the data array
* @param length the number of elements
*/
public StringListImpl(String[] array, int length) {
fArray = array;
fLength = length;
fVector = null;
}
/**
* The number of Objects
in the list. The range of valid
* child node indices is 0 to length-1
inclusive.
*/
public int getLength() {
return fLength;
}
/**
* Checks if the GenericString
item
is a member
* of this list.
* @param item GenericString
whose presence in this list is
* to be tested.
* @return True if this list contains the GenericString
* item
.
*/
public boolean contains(String item) {
if (fVector != null) {
return fVector.contains(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 String item(int index) {
if (index < 0 || index >= fLength) {
return null;
}
if (fVector != null) {
return (String)fVector.elementAt(index);
}
return fArray[index];
}
/*
* List methods
*/
public Object get(int index) {
if (index >= 0 && index < fLength) {
if (fVector != null) {
return fVector.elementAt(index);
}
return fArray[index];
}
throw new IndexOutOfBoundsException("Index: " + index);
}
public int size() {
return getLength();
}
public Object[] toArray() {
if (fVector != null) {
return fVector.toArray();
}
Object[] a = new Object[fLength];
toArray0(a);
return a;
}
public Object[] toArray(Object[] a) {
if (fVector != null) {
return fVector.toArray(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);
}
}
} // class StringListImpl