/**
 * ASM: a very small and fast Java bytecode manipulation framework
 * Copyright (c) 2000,2002,2003 INRIA, France Telecom
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holders nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.objectweb.asm.attrs;

import org.objectweb.asm.Label;

/**
 * Verification type info used by {@link StackMapAttribute}.
 *
 * @see <a href="http://www.jcp.org/en/jsr/detail?id=139">JSR 139 : Connected
 * Limited Device Configuration 1.1</a>
 *
 * @author Eugene Kuleshov
 */

public class StackMapType {

  public static final int ITEM_Top = 0;

  public static final int ITEM_Integer = 1;

  public static final int ITEM_Float = 2;

  public static final int ITEM_Double = 3;

  public static final int ITEM_Long = 4;

  public static final int ITEM_Null = 5;

  public static final int ITEM_UninitializedThis = 6;

  public static final int ITEM_Object = 7;

  public static final int ITEM_Uninitialized = 8;

  public static final String[] ITEM_NAMES = {
    "Top",
    "Integer",
    "Float",
    "Double",
    "Long",
    "Null",
    "UninitializedThis",
    "Object",
    "Uninitialized"
  };

  private int type;

  private Label offset;

  private String object;

  private StackMapType (int type) {
    this.type = type;
  }

  public int getType () {
    return type;
  }

  public static StackMapType getTypeInfo (int itemType) {
    return new StackMapType(itemType);
  }

  public void setLabel (Label offset) {
    this.offset = offset;
  }

  public void setObject (String object) {
    this.object = object;
  }

  public Label getLabel () {
    return offset;
  }

  public String getObject () {
    return object;
  }

  public String toString () {
    StringBuffer sb = new StringBuffer(ITEM_NAMES[type]);
    if (type == ITEM_Object) {
      sb.append(":").append(object);
    }
    if (type == ITEM_Uninitialized) {
      sb.append(":L").append(System.identityHashCode(offset));
    }
    return sb.toString();
  }
}
