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Java example source code file (SimpleAttributeValue.java)

This example Java source code file (SimpleAttributeValue.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

constantpoolgen, instructionlist, methodgenerator, push, simpleattributevalue, string, the, typecheckerror

The SimpleAttributeValue.java Java example source code

/*
 * reserved comment block
 * DO NOT REMOVE OR ALTER!
 */
/*
 * 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: SimpleAttributeValue.java,v 1.2.4.1 2005/09/05 08:58:46 pvedula Exp $
 */

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.InstructionList;
import com.sun.org.apache.bcel.internal.generic.PUSH;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;

/**
 * @author Jacek Ambroziak
 * @author Santiago Pericas-Geertsen
 */
final class SimpleAttributeValue extends AttributeValue {

    private String _value; // The attributes value (literate string).

    /**
     * Creates a new simple attribute value.
     * @param value the attribute value.
     */
    public SimpleAttributeValue(String value) {
        _value = value;
    }

    /**
     * Returns this attribute value's type (String).
     * @param stable The compiler/parser's symbol table
     */
    public Type typeCheck(SymbolTable stable) throws TypeCheckError {
        return _type = Type.String;
    }

    public String toString() {
        return _value;
    }

    protected boolean contextDependent() {
        return false;
    }

    /**
     * Translate this attribute value into JVM bytecodes that pushes the
     * attribute value onto the JVM's stack.
     * @param classGen BCEL Java class generator
     * @param methodGen BCEL Java method generator
     */
    public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
        final ConstantPoolGen cpg = classGen.getConstantPool();
        final InstructionList il = methodGen.getInstructionList();
        il.append(new PUSH(cpg, _value));
    }
}

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