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/*
* $Id: CachedNodeListIterator.java,v 1.10 2010-11-01 04:34:24 joehw Exp $
*/
package com.sun.org.apache.xalan.internal.xsltc.dom;
import com.sun.org.apache.xml.internal.dtm.DTMAxisIterator;
import com.sun.org.apache.xml.internal.dtm.ref.DTMAxisIteratorBase;
import com.sun.org.apache.xalan.internal.xsltc.util.IntegerArray;
/**
* CachedNodeListIterator is used for select expressions in a
* variable or parameter. This iterator caches all nodes in an
* IntegerArray. Its cloneIterator() method is overridden to
* return an object of ClonedNodeListIterator.
*/
public final class CachedNodeListIterator extends DTMAxisIteratorBase {
/**
* Source for this iterator.
*/
private DTMAxisIterator _source;
private IntegerArray _nodes = new IntegerArray();
private int _numCachedNodes = 0;
private int _index = 0;
private boolean _isEnded = false;
public CachedNodeListIterator(DTMAxisIterator source) {
_source = source;
}
public void setRestartable(boolean isRestartable) {
//_isRestartable = isRestartable;
//_source.setRestartable(isRestartable);
}
public DTMAxisIterator setStartNode(int node) {
if (_isRestartable) {
_startNode = node;
_source.setStartNode(node);
resetPosition();
_isRestartable = false;
}
return this;
}
public int next() {
return getNode(_index++);
}
public int getPosition() {
return _index == 0 ? 1 : _index;
}
public int getNodeByPosition(int pos) {
return getNode(pos);
}
public int getNode(int index) {
if (index < _numCachedNodes) {
return _nodes.at(index);
}
else if (!_isEnded){
int node = _source.next();
if (node != END) {
_nodes.add(node);
_numCachedNodes++;
}
else {
_isEnded = true;
}
return node;
}
else
return END;
}
public DTMAxisIterator cloneIterator() {
ClonedNodeListIterator clone = new ClonedNodeListIterator(this);
return clone;
}
public DTMAxisIterator reset() {
_index = 0;
return this;
}
public void setMark() {
_source.setMark();
}
public void gotoMark() {
_source.gotoMark();
}
}