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The Drools and jBPM public API which is backwards compatible between releases.

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/*
 * Copyright 2010 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.
 * You may obtain a copy of the License at
 *
 *      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.base;

import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;

import org.drools.impl.adapters.ActivationAdapter;
import org.drools.impl.adapters.StatefulKnowledgeSessionAdapter;
import org.drools.runtime.rule.ConsequenceException;
import org.kie.api.runtime.rule.ConsequenceExceptionHandler;
import org.kie.api.runtime.rule.Match;
import org.kie.api.runtime.rule.RuleRuntime;
import org.kie.internal.runtime.StatefulKnowledgeSession;

public class DefaultConsequenceExceptionHandler implements ConsequenceExceptionHandler, Externalizable {

    public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
    }

    public void writeExternal(ObjectOutput out) throws IOException {
    }

    public void handleException(Match match, RuleRuntime workingMemory, Exception exception) {
        throw new ConsequenceException( exception, 
                new StatefulKnowledgeSessionAdapter( (StatefulKnowledgeSession) workingMemory ), 
                new ActivationAdapter( match ) );
    }

}