com.espertech.esper.epl.enummethod.eval.EnumEvalFirstOfPredicateScalar Maven / Gradle / Ivy

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/*
 ***************************************************************************************
 *  Copyright (C) 2006 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.enummethod.eval;

import com.espertech.esper.client.EventBean;
import com.espertech.esper.epl.expression.core.ExprEvaluator;
import com.espertech.esper.epl.expression.core.ExprEvaluatorContext;
import com.espertech.esper.event.arr.ObjectArrayEventBean;
import com.espertech.esper.event.arr.ObjectArrayEventType;

import java.util.Collection;

public class EnumEvalFirstOfPredicateScalar extends EnumEvalBaseScalar implements EnumEval {

    public EnumEvalFirstOfPredicateScalar(ExprEvaluator innerExpression, int streamCountIncoming, ObjectArrayEventType type) {
        super(innerExpression, streamCountIncoming, type);
    }

    public Object evaluateEnumMethod(EventBean[] eventsLambda, Collection target, boolean isNewData, ExprEvaluatorContext context) {
        ObjectArrayEventBean evalEvent = new ObjectArrayEventBean(new Object[1], type);
        for (Object next : target) {

            evalEvent.getProperties()[0] = next;
            eventsLambda[streamNumLambda] = evalEvent;

            Object pass = getInnerExpression().evaluate(eventsLambda, isNewData, context);
            if (pass == null || (!(Boolean) pass)) {
                continue;
            }

            return next;
        }

        return null;
    }
}