/*
* 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: LastCall.java,v 1.11 2004/02/16 22:24:28 minchau Exp $
*/
package org.apache.xalan.xsltc.compiler;
import org.apache.bcel.generic.ConstantPoolGen;
import org.apache.bcel.generic.ILOAD;
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.CompareGenerator;
import org.apache.xalan.xsltc.compiler.util.MethodGenerator;
import org.apache.xalan.xsltc.compiler.util.TestGenerator;
/**
* @author Jacek Ambroziak
* @author Santiago Pericas-Geertsen
*/
final class LastCall extends FunctionCall {
public LastCall(QName fname) {
super(fname);
}
public boolean hasPositionCall() {
return true;
}
public boolean hasLastCall() {
return true;
}
public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
final InstructionList il = methodGen.getInstructionList();
if (methodGen instanceof CompareGenerator) {
il.append(((CompareGenerator)methodGen).loadLastNode());
}
else if (methodGen instanceof TestGenerator) {
il.append(new ILOAD(LAST_INDEX));
}
else {
final ConstantPoolGen cpg = classGen.getConstantPool();
final int getLast = cpg.addInterfaceMethodref(NODE_ITERATOR,
"getLast",
"()I");
il.append(methodGen.loadIterator());
il.append(new INVOKEINTERFACE(getLast, 1));
}
}
}