InsnTarget.java

/*
 * 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.PrintStream;

/**
 * InsnTarget is a pseudo-instruction which represents a branch target
 * in an instruction stream.
 */

public class InsnTarget extends Insn {

  private boolean branchTarget = false;

  public int nStackArgs() {
    return 0;
  }

  public int nStackResults() {
    return 0;
  }

  public String argTypes() {
      return "";//NOI18N
  }

  public String resultTypes() {
      return "";//NOI18N
  }

  public boolean branches() {
    return false;
  }

  public void setBranchTarget() {
    branchTarget = true;
  }

  /* not valid unless method instructions processed specially */
  public boolean isBranchTarget() {
    return branchTarget;
  }

  /**
   * Constructor
   */
  public InsnTarget() {
    super(opc_target, NO_OFFSET);
  }

  /* package local methods */

  void print (PrintStream out, int indent) {
    ClassPrint.spaces(out, indent);
    out.println(offset() + ":");//NOI18N
  }

  int store(byte buf[], int index) {
    return index;
  }

  int size() {
    return 0;
  }

  InsnTarget(int offset) {
    super(opc_target, offset);
  }

}