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  * Copyright 2005 JBoss Inc
  * 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
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.
package org.drools.runtime.rule;
A public interface to be implemented by all evaluators
public interface Evaluator
    Serializable {

Returns the operator representation object for this evaluator

    public Operator getOperator();
Returns true if this evaluator implements a temporal evaluation, i.e., a time sensitive evaluation whose properties of matching only events within an specific time interval can be used for determining event expirations automatically.

true if the evaluator is a temporal evaluator.
    public boolean isTemporal();
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