org.drools.jsr94.rules.Jsr94FactHandle Maven / Gradle / Ivy

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Implements the JSR-94 API with Drools.
There is a newer version: 7.2.0.Final
package org.drools.jsr94.rules;

/*
 * $Id: Jsr94FactHandle.java,v 1.14 2005/02/04 02:13:38 mproctor Exp $
 *
 * Copyright 2003-2004 (C) The Werken Company. All Rights Reserved.
 *
 * Redistribution and use of this software and associated documentation
 * ("Software"), with or without modification, are permitted provided that the
 * following conditions are met:
 *
 * 1. Redistributions of source code must retain copyright statements and
 * notices. Redistributions must also contain a copy of this document.
 *
 * 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. The name "drools" must not be used to endorse or promote products derived
 * from this Software without prior written permission of The Werken Company.
 * For written permission, please contact [email protected].
 *
 * 4. Products derived from this Software may not be called "drools" nor may
 * "drools" appear in their names without prior written permission of The Werken
 * Company. "drools" is a registered trademark of The Werken Company.
 *
 * 5. Due credit should be given to The Werken Company.
 * (http://drools.werken.com/).
 *
 * THIS SOFTWARE IS PROVIDED BY THE WERKEN COMPANY AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESSED 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 WERKEN COMPANY OR ITS 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.
 */

import javax.rules.Handle;

import org.drools.core.common.DefaultFactHandle;
import org.kie.api.runtime.rule.EntryPoint;

/**
 * The Drools implementation of the Handle interface which provides
 * a marker interface for Drools-specific object identity mechanism. When using
 * the StatefulRuleSession objects that are added to rule session
 * state are identified using a Drools-supplied Handle
 * implementation.
 * 
 * Handles are used to unambigiously identify objects within the
 * rule session state and should not suffer many of the object identity issues
 * that arise when using muliple class loaders, serializing
 * StatefulRuleSessions, or using Object.equals or
 * object1 == object2 reference equality.
 */
public class Jsr94FactHandle extends DefaultFactHandle
    implements
    Handle {

    private static final long serialVersionUID = 510l;

    /**
     * Constructs a new Handle.
     *
     * @param id A unique Handle id.
     * @param recency A value indicating the recency of this Handle
     *        (more recently created Handles have greater values
     *         than Handles created further in the past)
     *
     * @see org.kie.conflict.RecencyConflictResolver
     */
    Jsr94FactHandle(final long id,
                    final Object object,
                    final long recency,
                    final EntryPoint entryPoint) {
        super( (int) id,
               object,
               recency,
               entryPoint );
    }
}