| /* |
| * @(#)$Id$ |
| * |
| * 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 java.util.Vector; |
| import java.util.Enumeration; |
| import java.util.StringTokenizer; |
| |
| import javax.xml.parsers.*; |
| |
| import org.xml.sax.*; |
| |
| import org.apache.xalan.xsltc.compiler.util.Type; |
| import de.fub.bytecode.generic.*; |
| import org.apache.xalan.xsltc.compiler.util.*; |
| |
| final class Copy extends Instruction { |
| private UseAttributeSets _useSets; |
| |
| public void parseContents(Parser parser) { |
| final String useSets = getAttribute("use-attribute-sets"); |
| if (useSets.length() > 0) { |
| _useSets = new UseAttributeSets(useSets, parser); |
| } |
| parseChildren(parser); |
| } |
| |
| public void display(int indent) { |
| indent(indent); |
| Util.println("Copy"); |
| indent(indent + IndentIncrement); |
| displayContents(indent + IndentIncrement); |
| } |
| |
| public Type typeCheck(SymbolTable stable) throws TypeCheckError { |
| if (_useSets != null) { |
| _useSets.typeCheck(stable); |
| } |
| typeCheckContents(stable); |
| return Type.Void; |
| } |
| |
| public void translate(ClassGenerator classGen, MethodGenerator methodGen) { |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| final InstructionList il = methodGen.getInstructionList(); |
| |
| final LocalVariableGen name = |
| methodGen.addLocalVariable2("name", |
| Util.getJCRefType(STRING_SIG), |
| il.getEnd()); |
| final LocalVariableGen length = |
| methodGen.addLocalVariable2("length", |
| Util.getJCRefType("I"), |
| il.getEnd()); |
| |
| // Get the name of the node to copy and save for later |
| il.append(methodGen.loadDOM()); |
| il.append(methodGen.loadCurrentNode()); |
| il.append(methodGen.loadHandler()); |
| final int cpy = cpg.addInterfaceMethodref(DOM_INTF, |
| "shallowCopy", |
| "(" |
| + NODE_SIG |
| + TRANSLET_OUTPUT_SIG |
| + ")" + STRING_SIG); |
| il.append(new INVOKEINTERFACE(cpy, 3)); |
| il.append(DUP); |
| il.append(new ASTORE(name.getIndex())); |
| final BranchHandle ifBlock1 = il.append(new IFNULL(null)); |
| |
| // Get the length of the node name and save for later |
| il.append(new ALOAD(name.getIndex())); |
| final int lengthMethod = cpg.addMethodref(STRING_CLASS,"length","()I"); |
| il.append(new INVOKEVIRTUAL(lengthMethod)); |
| il.append(new ISTORE(length.getIndex())); |
| |
| // Copy in attribute sets if specified |
| if (_useSets != null) { |
| // If the parent of this element will result in an element being |
| // output then we know that it is safe to copy out the attributes |
| final SyntaxTreeNode parent = getParent(); |
| if ((parent instanceof LiteralElement) || |
| (parent instanceof LiteralElement)) { |
| _useSets.translate(classGen, methodGen); |
| } |
| // If not we have to check to see if the copy will result in an |
| // element being output. |
| else { |
| // check if element; if not skip to translate body |
| il.append(new ILOAD(length.getIndex())); |
| final BranchHandle ifBlock2 = il.append(new IFEQ(null)); |
| // length != 0 -> element -> do attribute sets |
| _useSets.translate(classGen, methodGen); |
| // not an element; root |
| ifBlock2.setTarget(il.append(NOP)); |
| } |
| } |
| |
| // Instantiate body of xsl:copy |
| translateContents(classGen, methodGen); |
| |
| // Call the output handler's endElement() if we copied an element |
| // (The DOM.shallowCopy() method calls startElement().) |
| il.append(new ILOAD(length.getIndex())); |
| final BranchHandle ifBlock3 = il.append(new IFEQ(null)); |
| il.append(methodGen.loadHandler()); |
| il.append(new ALOAD(name.getIndex())); |
| il.append(methodGen.endElement()); |
| |
| final InstructionHandle end = il.append(NOP); |
| ifBlock1.setTarget(end); |
| ifBlock3.setTarget(end); |
| methodGen.removeLocalVariable(name); |
| methodGen.removeLocalVariable(length); |
| } |
| } |