14c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson/* 24c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * Licensed to the Apache Software Foundation (ASF) under one 34c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * or more contributor license agreements. See the NOTICE file 44c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * distributed with this work for additional information 54c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * regarding copyright ownership. The ASF licenses this file 64c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * to you under the Apache License, Version 2.0 (the "License"); 74c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * you may not use this file except in compliance with the License. 84c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * You may obtain a copy of the License at 94c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * 104c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * http://www.apache.org/licenses/LICENSE-2.0 114c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * 124c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * Unless required by applicable law or agreed to in writing, software 134c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * distributed under the License is distributed on an "AS IS" BASIS, 144c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 154c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * See the License for the specific language governing permissions and 164c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * limitations under the License. 174c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 184c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson/* 194c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * $Id: AttributeIterator.java 468655 2006-10-28 07:12:06Z minchau $ 204c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 214c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilsonpackage org.apache.xpath.axes; 224c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 234c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilsonimport org.apache.xml.dtm.DTM; 244c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilsonimport org.apache.xpath.compiler.Compiler; 254c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 264c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson/** 274c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * This class implements an optimized iterator for 284c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * attribute axes patterns. 294c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @see org.apache.xpath.axes#ChildTestIterator 304c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @xsl.usage advanced 314c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 324c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilsonpublic class AttributeIterator extends ChildTestIterator 334c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson{ 344c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson static final long serialVersionUID = -8417986700712229686L; 354c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 364c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson /** 374c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * Create a AttributeIterator object. 384c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * 394c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @param compiler A reference to the Compiler that contains the op map. 404c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @param opPos The position within the op map, which contains the 414c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * location path expression for this itterator. 424c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * 434c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @throws javax.xml.transform.TransformerException 444c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 454c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson AttributeIterator(Compiler compiler, int opPos, int analysis) 464c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson throws javax.xml.transform.TransformerException 474c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson { 484c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson super(compiler, opPos, analysis); 494c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson } 504c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 514c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson /** 524c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * Get the next node via getFirstAttribute && getNextAttribute. 534c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 544c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson protected int getNextNode() 554c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson { 564c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson m_lastFetched = (DTM.NULL == m_lastFetched) 574c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson ? m_cdtm.getFirstAttribute(m_context) 584c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson : m_cdtm.getNextAttribute(m_lastFetched); 594c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson return m_lastFetched; 604c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson } 614c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 624c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson /** 634c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * Returns the axis being iterated, if it is known. 644c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * 654c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @return Axis.CHILD, etc., or -1 if the axis is not known or is of multiple 664c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * types. 674c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 684c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson public int getAxis() 694c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson { 704c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson return org.apache.xml.dtm.Axis.ATTRIBUTE; 714c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson } 724c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 734c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 744c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 754c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson} 76