jaxp/src/java.xml/share/classes/com/sun/org/apache/bcel/internal/generic/IFNONNULL.java

/*
 * reserved comment block
 * DO NOT REMOVE OR ALTER!
 */
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

package com.sun.org.apache.bcel.internal.generic;


/**
 * IFNONNULL - Branch if reference is not null
 *
 * <PRE>Stack: ..., reference -&gt; ...</PRE>
 *
 * @author  <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
 */
public class IFNONNULL extends IfInstruction {
  /**
   * Empty constructor needed for the Class.newInstance() statement in
   * Instruction.readInstruction(). Not to be used otherwise.
   */
  IFNONNULL() {}

  public IFNONNULL(InstructionHandle target) {
    super(com.sun.org.apache.bcel.internal.Constants.IFNONNULL, target);
  }

  /**
   * @return negation of instruction
   */
  public IfInstruction negate() {
    return new IFNULL(target);
  }

  /**
   * Call corresponding visitor method(s). The order is:
   * Call visitor methods of implemented interfaces first, then
   * call methods according to the class hierarchy in descending order,
   * i.e., the most specific visitXXX() call comes last.
   *
   * @param v Visitor object
   */
  public void accept(Visitor v) {
    v.visitStackConsumer(this);
    v.visitBranchInstruction(this);
    v.visitIfInstruction(this);
    v.visitIFNONNULL(this);
  }
}