JDK14/Java14源码在线阅读

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 * Licensed to the Apache Software Foundation (ASF) under one or more
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 * this work for additional information regarding copyright ownership.
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 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
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 *      http://www.apache.org/licenses/LICENSE-2.0
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package com.sun.org.apache.xalan.internal.xsltc.compiler;

import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
import com.sun.org.apache.bcel.internal.generic.ILOAD;
import com.sun.org.apache.bcel.internal.generic.INVOKEINTERFACE;
import com.sun.org.apache.bcel.internal.generic.InstructionList;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.CompareGenerator;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
import com.sun.org.apache.xalan.internal.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();

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