/*******************************************************************************
* Copyright (c) 1998, 2015 Oracle and/or its affiliates. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Oracle - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.tools.workbench.utility.classfile;
import java.io.IOException;
import java.io.PrintWriter;
import org.eclipse.persistence.tools.workbench.utility.classfile.tools.ClassFileDataInputStream;
import org.eclipse.persistence.tools.workbench.utility.io.IndentingPrintWriter;
/**
* This class models a constant value attribute:
* u2 attribute_name_index;
* u4 attribute_length;
* u2 constantvalue_index;
*
* See "The Java Virtual Machine Specification" Chapter 4.
*/
public class ConstantValueAttribute extends Attribute {
private short constantValueIndex;
/**
* Construct a constant value attribute from the specified stream
* of byte codes.
*/
ConstantValueAttribute(ClassFileDataInputStream stream, short nameIndex, AttributePool pool) throws IOException {
super(stream, nameIndex, pool);
}
void initializeInfo(ClassFileDataInputStream stream) throws IOException {
this.constantValueIndex = stream.readU2();
}
void displayInfoStringOn(IndentingPrintWriter writer) {
this.constantValue().displayStringOn(writer);
writer.println();
}
public void printFieldInitializationClauseOn(PrintWriter writer) {
writer.print(" = ");
this.constantValue().printFieldInitializationClauseOn(writer);
}
public Object fieldConstantValue() {
return this.constantValue().value();
}
public Constant constantValue() {
return this.constantPool().get(this.constantValueIndex);
}
public LongConstant longValue() {
return (LongConstant) this.constantValue();
}
public FloatConstant floatValue() {
return (FloatConstant) this.constantValue();
}
public DoubleConstant doubleValue() {
return (DoubleConstant) this.constantValue();
}
public IntegerConstant integerValue() {
return (IntegerConstant) this.constantValue();
}
public StringConstant stringValue() {
return (StringConstant) this.constantValue();
}
public void accept(Visitor visitor) {
visitor.visit(this);
}
public short getConstantValueIndex() {
return this.constantValueIndex;
}
void toString(StringBuffer sb) {
this.constantValue().toString(sb);
}
}