/*

 * Copyright 2009 Sun Microsystems, Inc.  All Rights Reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 *

 */

package sun.jvm.hotspot.code;

import java.io.*;

import java.util.*;

import sun.jvm.hotspot.debugger.*;

import sun.jvm.hotspot.utilities.*;

/** An ObjectValue describes an object eliminated by escape analysis. */

public class ObjectValue extends ScopeValue {

  private int        id;

  private ScopeValue klass;

  private List       fieldsValue; // ArrayList<ScopeValue>

  // Field "boolean visited" is not implemented here since

  // it is used only a during debug info creation.

  public ObjectValue(int id) {

    this.id = id;

    klass   = null;

    fieldsValue = new ArrayList();

  }

  public boolean isObject() { return true; }

  public int id() { return id; }

  public ScopeValue getKlass() { return klass; }

  public List getFieldsValue() { return fieldsValue; }

  public ScopeValue getFieldAt(int i) { return (ScopeValue)fieldsValue.get(i); }

  public int fieldsSize() { return fieldsValue.size(); }

  // Field "value" is always NULL here since it is used

  // only during deoptimization of a compiled frame

  // pointing to reallocated object.

  public OopHandle getValue() { return null; }

  /** Serialization of debugging information */

  void readObject(DebugInfoReadStream stream) {

    klass = readFrom(stream);

    Assert.that(klass.isConstantOop(), "should be constant klass oop");

    int length = stream.readInt();

    for (int i = 0; i < length; i++) {

      ScopeValue val = readFrom(stream);

      fieldsValue.add(val);

    }

  }

  // Printing

  public void print() {

    printOn(System.out);

  }

  public void printOn(PrintStream tty) {

    tty.print("scalarObj[" + id + "]");

  }

  void printFieldsOn(PrintStream tty) {

    if (fieldsValue.size() > 0) {

      ((ScopeValue)fieldsValue.get(0)).printOn(tty);

    }

    for (int i = 1; i < fieldsValue.size(); i++) {

      tty.print(", ");

      ((ScopeValue)fieldsValue.get(i)).printOn(tty);

    }

  }

};