/*
* @(#)$Id$
*
* 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 String DOM_CLASS = classGen.getDOMClass();
final LocalVariableGen name =
methodGen.addLocalVariable2("name",
Util.getJCRefType(STRING_SIG),
il.getEnd());
final LocalVariableGen length =
methodGen.addLocalVariable2("length",
Util.getJCRefType("I"),
il.getEnd());
il.append(methodGen.loadDOM());
il.append(methodGen.loadCurrentNode());
il.append(methodGen.loadHandler());
final int shallowCopy = cpg.addMethodref(DOM_CLASS,
"shallowCopy",
"("
+ NODE_SIG
+ TRANSLET_OUTPUT_SIG
+ ")" + STRING_SIG);
il.append(new INVOKEVIRTUAL(shallowCopy));
il.append(DUP);
il.append(new ASTORE(name.getIndex()));
final BranchHandle ifBlock1 = il.append(new IFNULL(null));
il.append(new ALOAD(name.getIndex()));
final int lengthMethod = cpg.addMethodref(STRING_CLASS,"length","()I");
il.append(new INVOKEVIRTUAL(lengthMethod));
// save length for later tests
il.append(new ISTORE(length.getIndex()));
// only if use-attribute-sets specified compile this seq
if (_useSets != null) {
// 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);
// check if element
il.append(new ILOAD(length.getIndex()));
final BranchHandle ifBlock3 = il.append(new IFEQ(null));
// emit endElement
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);
}
}