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Complex event processing and event series analysis component

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/**************************************************************************************
 * 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.expression.funcs;

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.metrics.instrumentation.InstrumentationHelper;

public class ExprCastNodeNonConstEval implements ExprEvaluator
{
    private final ExprCastNode parent;
    private final ExprEvaluator evaluator;
    private final ExprCastNode.CasterParserComputer casterParserComputer;

    public ExprCastNodeNonConstEval(ExprCastNode parent, ExprEvaluator evaluator, ExprCastNode.CasterParserComputer casterParserComputer) {
        this.parent = parent;
        this.evaluator = evaluator;
        this.casterParserComputer = casterParserComputer;
    }

    public Object evaluate(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context) {
        if (InstrumentationHelper.ENABLED) { InstrumentationHelper.get().qExprCast(parent);}

        Object result = evaluator.evaluate(eventsPerStream, isNewData, context);
        if (result != null) {
            result = casterParserComputer.compute(result, eventsPerStream, isNewData, context);
        }

        if (InstrumentationHelper.ENABLED) { InstrumentationHelper.get().aExprCast(result);}
        return result;
    }

    public Class getType() {
        return parent.getTargetType();
    }
}