com.espertech.esper.pattern.EvalEveryDistinctNode Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of esper Show documentation

Complex event processing and event series analysis component

There is a newer version: 7.1.0

/**************************************************************************************
 * Copyright (C) 2006-2015 EsperTech Inc. All rights reserved.                        *
 * http://www.espertech.com/esper                                                          *
 * http://www.espertech.com                                                           *
 * ---------------------------------------------------------------------------------- *
 * The software in this package is published under the terms of the GPL license       *
 * a copy of which has been included with this distribution in the license.txt file.  *
 **************************************************************************************/
package com.espertech.esper.pattern;

/**
 * This class represents an 'every-distinct' operator in the evaluation tree representing an event expression.
 */
public class EvalEveryDistinctNode extends EvalNodeBase {
    protected final EvalEveryDistinctFactoryNode factoryNode;
    private final EvalNode childNode;

    public EvalEveryDistinctNode(EvalEveryDistinctFactoryNode factoryNode, EvalNode childNode, PatternAgentInstanceContext agentInstanceContext) {
        super(agentInstanceContext);
        this.factoryNode = factoryNode;
        this.childNode = childNode;
    }

    public EvalEveryDistinctFactoryNode getFactoryNode() {
        return factoryNode;
    }

    public EvalNode getChildNode() {
        return childNode;
    }

    public EvalStateNode newState(Evaluator parentNode,
                                  EvalStateNodeNumber stateNodeNumber, long stateNodeId)
    {
        if (factoryNode.getTimeDeltaComputation() == null) {
            return new EvalEveryDistinctStateNode(parentNode, this);
        }
        else {
            return new EvalEveryDistinctStateExpireKeyNode(parentNode, this);
        }
    }
}