com.sun.jdo.api.persistence.enhancer.classfile.ConstBasic Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of payara-micro Show documentation
Micro Distribution of the Payara Project for IBM JDK
There is a newer version: 4.1.2.181
/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package com.sun.jdo.api.persistence.enhancer.classfile;

import java.io.*;

/**
 * Abstract base class of the types which represent entries in
 * the class constant pool.
 */

abstract public class ConstBasic implements VMConstants {
  /* The index of the constant entry in the constant pool */
  protected int index = 0;

  /* public accessors */

  /* Get the index of this constant entry */
  public int getIndex() { return index; }

  /* Return the type of the constant entry - see VMConstants */
  public abstract int tag ();

  /* package local methods */

  /**
   * Sets the index of this constant with its containing constant pool
   */
  void setIndex(int ind) { index = ind; }

  /**
   * Write this Constant pool entry to the output stream
   */
  abstract void formatData (DataOutputStream b) throws IOException;

  /**
   * Resolve integer index references to the actual constant pool
   * entries that they represent.  This is used during class file 
   * reading because a constant pool entry could have a forward
   * reference to a higher numbered constant.
   */
  abstract void resolve (ConstantPool p);

  /**
   * Return the index of this constant in the constant pool as
   * a decimal formatted String.
   */
  String indexAsString() { return Integer.toString(index); }

  /**
   * The constructor for subtypes
   */
  ConstBasic () {}
}