/*
* 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: VariableRef.java,v 1.17 2004/02/24 02:58:42 zongaro Exp $
*/
package org.apache.xalan.xsltc.compiler;
import org.apache.bcel.generic.CHECKCAST;
import org.apache.bcel.generic.ConstantPoolGen;
import org.apache.bcel.generic.GETFIELD;
import org.apache.bcel.generic.INVOKEINTERFACE;
import org.apache.bcel.generic.InstructionList;
import org.apache.xalan.xsltc.compiler.util.ClassGenerator;
import org.apache.xalan.xsltc.compiler.util.MethodGenerator;
import org.apache.xalan.xsltc.compiler.util.NodeSetType;
/**
* @author Jacek Ambroziak
* @author Santiago Pericas-Geertsen
* @author Morten Jorgensen
* @author Erwin Bolwidt <ejb@klomp.org>
*/
final class VariableRef extends VariableRefBase {
public VariableRef(Variable variable) {
super(variable);
}
public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
final ConstantPoolGen cpg = classGen.getConstantPool();
final InstructionList il = methodGen.getInstructionList();
// Fall-through for variables that are implemented as methods
if (_type.implementedAsMethod()) return;
final String name = _variable.getEscapedName();
final String signature = _type.toSignature();
if (_variable.isLocal()) {
if (classGen.isExternal()) {
Closure variableClosure = _closure;
while (variableClosure != null) {
if (variableClosure.inInnerClass()) break;
variableClosure = variableClosure.getParentClosure();
}
if (variableClosure != null) {
il.append(ALOAD_0);
il.append(new GETFIELD(
cpg.addFieldref(variableClosure.getInnerClassName(),
name, signature)));
}
else {
il.append(_variable.loadInstruction());
_variable.removeReference(this);
}
}
else {
il.append(_variable.loadInstruction());
_variable.removeReference(this);
}
}
else {
final String className = classGen.getClassName();
il.append(classGen.loadTranslet());
if (classGen.isExternal()) {
il.append(new CHECKCAST(cpg.addClass(className)));
}
il.append(new GETFIELD(cpg.addFieldref(className,name,signature)));
}
if (_variable.getType() instanceof NodeSetType) {
// The method cloneIterator() also does resetting
final int clone = cpg.addInterfaceMethodref(NODE_ITERATOR,
"cloneIterator",
"()" +
NODE_ITERATOR_SIG);
il.append(new INVOKEINTERFACE(clone, 1));
}
}
}