src.openwfe.org.engine.workitem.AtomicAttribute Maven / Gradle / Ivy
/*
* Copyright (c) 2005, John Mettraux, OpenWFE.org
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* . Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* . 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.
*
* . Neither the name of the "OpenWFE" 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.
*
* $Id: AtomicAttribute.java 1882 2005-05-17 16:41:07Z jmettraux $
*/
//
// AtomicAttribute.java
//
// [email protected]
//
// generated with
// jtmpl 1.0.04 31.10.2002 John Mettraux ([email protected])
//
package openwfe.org.engine.workitem;
/**
* An attribute containing a single value (instance), this attribute class
* is the father of all atomic attributes, ie attributes that are not lists
* or maps, attributes that hold a single value.
*
* CVS Info :
*
$Author: jmettraux $
*
$Date: 2005-05-17 18:41:07 +0200 (Tue, 17 May 2005) $
*
$Id: AtomicAttribute.java 1882 2005-05-17 16:41:07Z jmettraux $
*
* @author [email protected]
*/
public abstract class AtomicAttribute
implements Attribute
{
//
// FIELDS
/**
* The wrapped value itself.
*/
protected Object value = null;
//
// CONSTRUCTORS
/* *
* An empty constructor, for a null value.
* /
protected AtomicAttribute ()
{
}
*/
/**
* Wraps the object as the value of this new AtomicAttribute instance.
*/
protected AtomicAttribute (final Object o)
{
this.value = o;
}
//
// METHODS
/**
* Returns the object wrapped here.
*/
public Object getValue ()
{
return this.value;
}
/**
* Sets the atomic context wrapped inside here.
*/
public void setValue (final Object value)
{
if (value == null)
throw new IllegalArgumentException("Cannot set to a null value");
this.value = value;
}
/**
* Simply returns the hashcode of the wrapped value.
*/
public int hashCode ()
{
//if (this.value == null) return -1; ??????????????
//
// there were no problem till now, so this shortcut is left
// commented out...
return this.value.hashCode();
}
public boolean equals (final Object o)
{
if (o == null || ! (o instanceof AtomicAttribute)) return false;
return
this.value.equals(((AtomicAttribute)o).value);
}
/**
* Child classes that are not abstract have to implement (provide a body)
* for this method. Declaring it here enforces this policy at compile
* time.
*/
public abstract Object clone ();
/**
* Simply returns the wrapped value toString() result.
*/
public String toString ()
{
//if (this.value == null) return null;
return this.value.toString();
}
}