com.espertech.esper.epl.named.NamedWindowOnMergeMatch 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.epl.named;

import com.espertech.esper.client.EventBean;
import com.espertech.esper.collection.OneEventCollection;
import com.espertech.esper.epl.expression.core.ExprEvaluator;
import com.espertech.esper.epl.expression.core.ExprEvaluatorContext;
import com.espertech.esper.epl.expression.core.ExprNode;
import com.espertech.esper.metrics.instrumentation.InstrumentationHelper;

import java.util.List;

public class NamedWindowOnMergeMatch
{
    private ExprEvaluator optionalCond;
    private List actions;

    public NamedWindowOnMergeMatch(ExprNode optionalCond, List actions) {
        this.optionalCond = optionalCond != null ? optionalCond.getExprEvaluator() : null;
        this.actions = actions;
    }

    public boolean isApplies(EventBean[] eventsPerStream, ExprEvaluatorContext context) {
        if (optionalCond == null) {
            return true;
        }

        Object result = optionalCond.evaluate(eventsPerStream, true, context);
        return result != null && (Boolean) result;
    }

    public void apply(EventBean matchingEvent, EventBean[] eventsPerStream, OneEventCollection newData, OneEventCollection oldData, ExprEvaluatorContext context) {
        if (InstrumentationHelper.ENABLED) { InstrumentationHelper.get().qInfraMergeWhenThenActions(actions.size());}

        int count = -1;
        for (NamedWindowOnMergeAction action : actions) {
            count++;

            if (InstrumentationHelper.ENABLED) {
                InstrumentationHelper.get().qInfraMergeWhenThenActionItem(count, action.getName());
                boolean applies = action.isApplies(eventsPerStream, context);
                if (applies) {
                    action.apply(matchingEvent, eventsPerStream, newData, oldData, context);
                }
                InstrumentationHelper.get().aInfraMergeWhenThenActionItem(applies);
                continue;
            }

            if (action.isApplies(eventsPerStream, context)) {
                action.apply(matchingEvent, eventsPerStream, newData, oldData, context);
            }
        }

        if (InstrumentationHelper.ENABLED) { InstrumentationHelper.get().aInfraMergeWhenThenActions();}
    }
}