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Implements the JSR-94 API with Drools.

There is a newer version: 7.2.0.Final

/*
 * Copyright 2015 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
*/

package org.drools.jsr94.rules;

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

import javax.rules.Handle;

/**
 * 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)
     */
    Jsr94FactHandle(final long id,
                    final Object object,
                    final long recency,
                    final EntryPoint entryPoint) {
        super( (int) id,
               object,
               recency,
               (WorkingMemoryEntryPoint)entryPoint );
    }
}