| /* |
| * @(#)$Id$ |
| * |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 2001 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Xalan" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation and was |
| * originally based on software copyright (c) 2001, Sun |
| * Microsystems., http://www.sun.com. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| * @author Jacek Ambroziak |
| * @author Santiago Pericas-Geertsen |
| * |
| */ |
| |
| package org.apache.xalan.xsltc.compiler; |
| |
| import org.apache.xalan.xsltc.compiler.util.Type; |
| import org.apache.bcel.generic.*; |
| import org.apache.xalan.xsltc.compiler.util.*; |
| import org.apache.xalan.xsltc.DOM; |
| import org.apache.xalan.xsltc.dom.Axis; |
| |
| final class LastCall extends FunctionCall { |
| |
| private int _type = -1; |
| |
| public LastCall(QName fname) { |
| super(fname); |
| } |
| |
| public LastCall(QName fname, int type) { |
| this(fname); |
| _type = type; |
| } |
| |
| public boolean hasPositionCall() { |
| return true; |
| } |
| |
| public boolean hasLastCall() { |
| return true; |
| } |
| |
| public void translate(ClassGenerator classGen, MethodGenerator methodGen) { |
| |
| final InstructionList il = methodGen.getInstructionList(); |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| |
| boolean lastChild = false; |
| |
| // If we're a part of an pattern's predicate we want to know what |
| // type of node we want to be looking for (not just any). |
| if (getParent() instanceof Expression) { |
| if (getParent().getParent() instanceof Predicate) { |
| Predicate pred = (Predicate)getParent().getParent(); |
| _type = pred.getPosType(); |
| if ((_type==DOM.ELEMENT) || (_type==DOM.ATTRIBUTE)) _type = -1; |
| } |
| } |
| |
| // If we're a part of a step-type expression we want the last of the |
| // current node's children and not the last in the current iterator. |
| if (getParent() instanceof Predicate) { |
| _type = ((Predicate)getParent()).getPosType(); |
| if ((_type==DOM.ELEMENT) || (_type==DOM.ATTRIBUTE)) _type = -1; |
| if (getParent().getParent() instanceof Step) { |
| lastChild = true; |
| } |
| } |
| |
| if (methodGen instanceof CompareGenerator) { |
| il.append(((CompareGenerator)methodGen).loadLastNode()); |
| } |
| else if (classGen.isExternal()) { |
| il.append(new ILOAD(LAST_INDEX)); |
| } |
| else if (_type == -1) { |
| final int last = cpg.addInterfaceMethodref(NODE_ITERATOR, |
| "getLast", |
| "()I"); |
| final int git = cpg.addInterfaceMethodref(DOM_INTF, |
| "getTypedAxisIterator", |
| "(II)"+NODE_ITERATOR_SIG); |
| final int start = cpg.addInterfaceMethodref(NODE_ITERATOR, |
| "setStartNode", |
| "(I)"+ |
| NODE_ITERATOR_SIG); |
| if (lastChild) { |
| il.append(methodGen.loadDOM()); |
| il.append(new PUSH(cpg, Axis.CHILD)); |
| il.append(new PUSH(cpg, DOM.ELEMENT)); |
| il.append(new INVOKEINTERFACE(git, 3)); |
| il.append(methodGen.loadCurrentNode()); |
| il.append(new INVOKEINTERFACE(start, 2)); |
| } |
| else { |
| il.append(methodGen.loadIterator()); |
| } |
| il.append(new INVOKEINTERFACE(last, 1)); |
| } |
| else { |
| // public int getTypedLast(int type, int node) { |
| final int last = cpg.addInterfaceMethodref(DOM_INTF, |
| "getTypedLast", |
| "(II)I"); |
| il.append(methodGen.loadDOM()); |
| il.append(new PUSH(cpg, _type)); |
| il.append(methodGen.loadContextNode()); |
| il.append(new INVOKEINTERFACE(last, 3)); |
| |
| } |
| } |
| } |