/*

 * reserved comment block

 * DO NOT REMOVE OR ALTER!

 */

/*

 * Copyright 2001-2004 The Apache Software Foundation.

 *

 * 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.

 */

/*

 * $Id: NodeIterator.java,v 1.2.4.1 2005/08/31 10:26:27 pvedula Exp $

 */

package com.sun.org.apache.xalan.internal.xsltc;

import com.sun.org.apache.xml.internal.dtm.DTM;

/**

 * @author Jacek Ambroziak

 * @author Santiago Pericas-Geertsen

 */

public interface NodeIterator extends Cloneable {

    public static final int END = DTM.NULL;

    /**

     * Callers should not call next() after it returns END.

     */

    public int next();

    /**

     * Resets the iterator to the last start node.

     */

    public NodeIterator reset();

    /**

     * Returns the number of elements in this iterator.

     */

    public int getLast();

    /**

     * Returns the position of the current node in the set.

     */

    public int getPosition();

    /**

     * Remembers the current node for the next call to gotoMark().

     */

    public void setMark();

    /**

     * Restores the current node remembered by setMark().

     */

    public void gotoMark();

    /**

     * Set start to END should 'close' the iterator,

     * i.e. subsequent call to next() should return END.

     */

    public NodeIterator setStartNode(int node);

    /**

     * True if this iterator has a reversed axis.

     */

    public boolean isReverse();

    /**

     * Returns a deep copy of this iterator.

     */

    public NodeIterator cloneIterator();

    /**

     * Prevents or allows iterator restarts.

     */

    public void setRestartable(boolean isRestartable);

}