1/* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18/* 19 * $Id: AttributeIterator.java 468655 2006-10-28 07:12:06Z minchau $ 20 */ 21package org.apache.xpath.axes; 22 23import org.apache.xml.dtm.DTM; 24import org.apache.xpath.compiler.Compiler; 25 26/** 27 * This class implements an optimized iterator for 28 * attribute axes patterns. 29 * @see org.apache.xpath.axes#ChildTestIterator 30 * @xsl.usage advanced 31 */ 32public class AttributeIterator extends ChildTestIterator 33{ 34 static final long serialVersionUID = -8417986700712229686L; 35 36 /** 37 * Create a AttributeIterator object. 38 * 39 * @param compiler A reference to the Compiler that contains the op map. 40 * @param opPos The position within the op map, which contains the 41 * location path expression for this itterator. 42 * 43 * @throws javax.xml.transform.TransformerException 44 */ 45 AttributeIterator(Compiler compiler, int opPos, int analysis) 46 throws javax.xml.transform.TransformerException 47 { 48 super(compiler, opPos, analysis); 49 } 50 51 /** 52 * Get the next node via getFirstAttribute && getNextAttribute. 53 */ 54 protected int getNextNode() 55 { 56 m_lastFetched = (DTM.NULL == m_lastFetched) 57 ? m_cdtm.getFirstAttribute(m_context) 58 : m_cdtm.getNextAttribute(m_lastFetched); 59 return m_lastFetched; 60 } 61 62 /** 63 * Returns the axis being iterated, if it is known. 64 * 65 * @return Axis.CHILD, etc., or -1 if the axis is not known or is of multiple 66 * types. 67 */ 68 public int getAxis() 69 { 70 return org.apache.xml.dtm.Axis.ATTRIBUTE; 71 } 72 73 74 75} 76