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

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/*
 * 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
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 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
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package com.sun.org.apache.bcel.internal.generic;


/**
 * Super class for instructions dealing with array access such as IALOAD.
 *
 * @author  <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
 */
public abstract class ArrayInstruction extends Instruction
  implements ExceptionThrower, TypedInstruction {
  /**
   * Empty constructor needed for the Class.newInstance() statement in
   * Instruction.readInstruction(). Not to be used otherwise.
   */
  ArrayInstruction() {}

  /**
   * @param opcode of instruction
   */
  protected ArrayInstruction(short opcode) {
    super(opcode, (short)1);
  }

  public Class[] getExceptions() {
    return com.sun.org.apache.bcel.internal.ExceptionConstants.EXCS_ARRAY_EXCEPTION;
  }

  /** @return type associated with the instruction
   */
  public Type getType(ConstantPoolGen cp) {
    switch(opcode) {
    case com.sun.org.apache.bcel.internal.Constants.IALOAD: case com.sun.org.apache.bcel.internal.Constants.IASTORE:
      return Type.INT;
    case com.sun.org.apache.bcel.internal.Constants.CALOAD: case com.sun.org.apache.bcel.internal.Constants.CASTORE:
      return Type.CHAR;
    case com.sun.org.apache.bcel.internal.Constants.BALOAD: case com.sun.org.apache.bcel.internal.Constants.BASTORE:
      return Type.BYTE;
    case com.sun.org.apache.bcel.internal.Constants.SALOAD: case com.sun.org.apache.bcel.internal.Constants.SASTORE:
      return Type.SHORT;
    case com.sun.org.apache.bcel.internal.Constants.LALOAD: case com.sun.org.apache.bcel.internal.Constants.LASTORE:
      return Type.LONG;
    case com.sun.org.apache.bcel.internal.Constants.DALOAD: case com.sun.org.apache.bcel.internal.Constants.DASTORE:
      return Type.DOUBLE;
    case com.sun.org.apache.bcel.internal.Constants.FALOAD: case com.sun.org.apache.bcel.internal.Constants.FASTORE:
      return Type.FLOAT;
    case com.sun.org.apache.bcel.internal.Constants.AALOAD: case com.sun.org.apache.bcel.internal.Constants.AASTORE:
      return Type.OBJECT;

    default: throw new ClassGenException("Oops: unknown case in switch" + opcode);
    }
  }
}