/*
* Copyright (c) 2001-2006 JGoodies Karsten Lentzsch. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* o Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* o 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.
*
* o Neither the name of JGoodies Karsten Lentzsch 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 com.jgoodies.animation;
/**
* An abstract class that minimizes the effort required to implement
* the {@link AnimationFunction} interface.
*
* @author Karsten Lentzsch
* @version $Revision: 1.1 $
*
* @see AnimationFunctions
*/
public abstract class AbstractAnimationFunction
implements AnimationFunction {
/**
* Describes this animation function's duration.
*/
private final long duration;
// Instance Creation ******************************************************
/**
* Constructs an <code>AbstractAnimationFunction</code> using the given
* duration.
*
* @param duration the function's duration
* @throws IllegalArgumentException if the duration is negative
*/
protected AbstractAnimationFunction(long duration) {
if (duration < 0)
throw new IllegalArgumentException("The duration must not be negative.");
this.duration = duration;
}
// ************************************************************************
/**
* Checks whether the given time is in the valid time range, that is
* a non-negative time that is smaller than this function's duration.
* If not, an <code>IllegalArgumentException</code> is thrown.
*
* @param time the time to be checked
* @throws IllegalArgumentException if the time is outside the valid time
* range
*/
protected void checkTimeRange(long time) {
if ((time < 0) || (time >= duration()))
throw new IllegalArgumentException(
"The time must be larger than 0 and smaller than "
+ duration()
+ ".");
}
/**
* Returns this animation function's duration.
*
* @return this animation function's duration
*/
public final long duration() {
return duration;
}
}
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