| /* |
| * @(#)$Id$ |
| * |
| * 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 |
| * @author Morten Jorgensen |
| * |
| */ |
| |
| package org.apache.xalan.xsltc.compiler; |
| |
| import java.util.Vector; |
| import java.util.Enumeration; |
| |
| import javax.xml.parsers.*; |
| |
| import org.xml.sax.*; |
| |
| import org.apache.xalan.xsltc.compiler.util.Type; |
| import org.apache.xalan.xsltc.compiler.util.ReferenceType; |
| import de.fub.bytecode.generic.*; |
| import org.apache.xalan.xsltc.compiler.util.*; |
| |
| final class ForEach extends Instruction { |
| private Expression _select; |
| |
| public void display(int indent) { |
| indent(indent); |
| Util.println("ForEach"); |
| indent(indent + IndentIncrement); |
| Util.println("select " + _select.toString()); |
| displayContents(indent + IndentIncrement); |
| } |
| |
| public void parseContents(Parser parser) { |
| _select = parser.parseExpression(this, "select", null); |
| |
| parseChildren(parser); |
| |
| // make sure required attribute(s) have been set |
| if (_select.isDummy()) { |
| reportError(this, parser, ErrorMsg.NREQATTR_ERR, "select"); |
| return; |
| } |
| } |
| |
| public Type typeCheck(SymbolTable stable) throws TypeCheckError { |
| Type tselect = _select.typeCheck(stable); |
| |
| if (tselect instanceof ReferenceType || tselect instanceof NodeType) { |
| _select = new CastExpr(_select, Type.NodeSet); |
| typeCheckContents(stable); |
| return Type.Void; |
| } |
| else if (tselect instanceof NodeSetType) { |
| typeCheckContents(stable); |
| return Type.Void; |
| } |
| throw new TypeCheckError(this); |
| } |
| |
| public void translate(ClassGenerator classGen, MethodGenerator methodGen) { |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| final InstructionList il = methodGen.getInstructionList(); |
| |
| // Save current node and current iterator on the stack |
| il.append(methodGen.loadCurrentNode()); |
| il.append(methodGen.loadIterator()); |
| |
| // Collect sort objects associated with this instruction |
| final Vector sortObjects = new Vector(); |
| Enumeration children = elements(); |
| while (children.hasMoreElements()) { |
| final Object child = children.nextElement(); |
| if (child instanceof Sort) { |
| sortObjects.addElement(child); |
| } |
| } |
| |
| // Compile node iterator |
| if (sortObjects.size() > 0) { |
| Sort.translateSortIterator(classGen, methodGen, |
| _select, sortObjects); |
| } |
| else { |
| _select.translate(classGen, methodGen); |
| if (_select instanceof Step) { |
| ((Step)_select).orderIterator(classGen, methodGen); |
| } |
| } |
| _select.startResetIterator(classGen, methodGen); |
| |
| // Overwrite current iterator |
| il.append(methodGen.storeIterator()); |
| |
| final BranchHandle nextNode = il.append(new GOTO(null)); |
| final InstructionHandle loop = il.append(NOP); |
| |
| translateContents(classGen, methodGen); |
| |
| nextNode.setTarget(il.append(methodGen.loadIterator())); |
| il.append(methodGen.nextNode()); |
| il.append(DUP); |
| il.append(methodGen.storeCurrentNode()); |
| il.append(new IFNE(loop)); |
| |
| // Restore current node and current iterator from the stack |
| il.append(methodGen.storeIterator()); |
| il.append(methodGen.storeCurrentNode()); |
| } |
| } |