LineEvent.java

/*
   Copyright (C) 2005 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
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combination.

As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
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terms of your choice, provided that you also meet, for each linked
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package javax.sound.sampled;

import java.io.IOException;
import java.io.NotSerializableException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.EventObject;

/**
 * This class holds information about a state change of a Line.
 * @specnote This class is not really serializable, and attempts to
 * serialize it will throw {@link NotSerializableException}.
 * @since 1.3
 */
public class LineEvent extends EventObject
{
  // We define this even though this class can't be serialized, in
  // order to placate the compiler.
  private static final long serialVersionUID = -1274246333383880410L;

  /**
   * This class represents the kinds of state changes that can occur
   * to a Line.  The standard states are availabe as static instances.
   * @since 1.3
   */
  public static class Type
  {
    /** An event of this type is posted when a Line closes.  */
    public static final Type CLOSE = new Type("close");

    /** An event of this type is posted when a Line opens.  */
    public static final Type OPEN = new Type("open");

    /** An event of this type is posted when a Line starts.  */
    public static final Type START = new Type("start");

    /** An event of this type is posted when a Line stops.  */
    public static final Type STOP = new Type("stop");

    private String name;

    /**
     * Create a new type with the indicated name.
     * @param name the name
     */
    protected Type(String name)
    {
      this.name = name;
    }

    public final boolean equals(Object o)
    {
      return super.equals(o);
    }

    public final int hashCode()
    {
      return super.hashCode();
    }

    /**
     * Return the name of this Type.
     */
    public String toString()
    {
      return name;
    }
  }

  private Type type;
  private long framePosition;
  private Line line;

  /**
   * Create a new LineEvent with the indicated line, type, and frame position.
   * @param line the line
   * @param type the type of the event
   * @param pos the frame position
   */
  public LineEvent(Line line, Type type, long pos)
  {
    super(line);
    this.line = line;
    this.type = type;
    this.framePosition = pos;
  }

  /**
   * Return the frame position associated with this event.
   */
  public final long getFramePosition()
  {
    return framePosition;
  }

  /**
   * Return the Line associated with this event.
   */
  public final Line getLine()
  {
    return line;
  }

  /**
   * Return the Type associated with this event.
   */
  public final Type getType()
  {
    return type;
  }

  /**
   * Return a description of this event.
   */
  public String toString()
  {
    return ("type=" + type + "; framePosition=" + framePosition
            + "line=" + line);
  }

  private void readObject(ObjectInputStream ois)
    throws IOException
  {
    throw new NotSerializableException("LineEvent is not serializable");
  }

  private void writeObject(ObjectOutputStream oos)
    throws IOException
  {
    throw new NotSerializableException("LineEvent is not serializable");
  }
}