| /* |
| * 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: ForwardPositionIterator.java,v 1.2.4.1 2005/09/06 06:22:05 pvedula Exp $ |
| */ |
| |
| package com.sun.org.apache.xalan.internal.xsltc.dom; |
| |
| import com.sun.org.apache.xalan.internal.xsltc.runtime.BasisLibrary; |
| import com.sun.org.apache.xml.internal.dtm.DTMAxisIterator; |
| import com.sun.org.apache.xml.internal.dtm.ref.DTMAxisIteratorBase; |
| |
| /** |
| * This iterator is a wrapper that always returns the position of |
| * a node in document order. It is needed for the case where |
| * a call to position() occurs in the context of an XSLT element |
| * such as xsl:for-each, xsl:apply-templates, etc. |
| * |
| * The getPosition() methods in DTMAxisIterators defined |
| * in DTMDefaultBaseIterators always return the position |
| * in document order, which is backwards for XPath in the |
| * case of the ancestor, ancestor-or-self, previous and |
| * previous-sibling. |
| * |
| * XSLTC implements position() with the |
| * BasisLibrary.positionF() method, and uses the |
| * DTMAxisIterator.isReverse() method to determine |
| * whether the result of getPosition() should be |
| * interpreted as being equal to position(). |
| * But when the expression appears in apply-templates of |
| * for-each, the position() function operates in document |
| * order. |
| * |
| * The only effect of the ForwardPositionIterator is to force |
| * the result of isReverse() to false, so that |
| * BasisLibrary.positionF() calculates position() in a way |
| * that's consistent with the context in which the |
| * iterator is being used." |
| * |
| * (Apparently the correction of isReverse() occurs |
| * implicitly, by inheritance. This class also appears |
| * to maintain its own position counter, which seems |
| * redundant.) |
| * |
| * @deprecated This class exists only for backwards compatibility with old |
| * translets. New code should not reference it. |
| */ |
| public final class ForwardPositionIterator extends DTMAxisIteratorBase { |
| |
| private DTMAxisIterator _source; |
| |
| public ForwardPositionIterator(DTMAxisIterator source) { |
| _source = source; |
| } |
| |
| public DTMAxisIterator cloneIterator() { |
| try { |
| final ForwardPositionIterator clone = |
| (ForwardPositionIterator) super.clone(); |
| clone._source = _source.cloneIterator(); |
| clone._isRestartable = false; |
| return clone.reset(); |
| } |
| catch (CloneNotSupportedException e) { |
| BasisLibrary.runTimeError(BasisLibrary.ITERATOR_CLONE_ERR, |
| e.toString()); |
| return null; |
| } |
| } |
| |
| public int next() { |
| return returnNode(_source.next()); |
| } |
| |
| public DTMAxisIterator setStartNode(int node) { |
| _source.setStartNode(node); |
| return this; |
| } |
| |
| public DTMAxisIterator reset() { |
| _source.reset(); |
| return resetPosition(); |
| } |
| |
| public void setMark() { |
| _source.setMark(); |
| } |
| |
| public void gotoMark() { |
| _source.gotoMark(); |
| } |
| } |