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

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

The newest version!

/*
 ***************************************************************************************
 *  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.codegen.base.CodegenClassScope;
import com.espertech.esper.codegen.base.CodegenMethodScope;
import com.espertech.esper.codegen.model.expression.CodegenExpression;
import com.espertech.esper.epl.enummethod.codegen.EnumForgeCodegenParams;
import com.espertech.esper.epl.enummethod.codegen.EnumForgeCodegenNames;
import com.espertech.esper.codegen.base.CodegenMethodNode;
import com.espertech.esper.epl.expression.core.ExprEvaluatorContext;

import java.util.Collection;
import java.util.LinkedHashSet;
import java.util.Set;

import static com.espertech.esper.codegen.model.expression.CodegenExpressionBuilder.*;
import static com.espertech.esper.codegen.model.expression.CodegenExpressionRelational.CodegenRelational.LE;

public class EnumDistinctScalarForge extends EnumForgeBase implements EnumForge, EnumEval {

    public EnumDistinctScalarForge(int streamCountIncoming) {
        super(streamCountIncoming);
    }

    public EnumEval getEnumEvaluator() {
        return this;
    }

    public Object evaluateEnumMethod(EventBean[] eventsLambda, Collection enumcoll, boolean isNewData, ExprEvaluatorContext context) {
        if (enumcoll.size() <= 1) {
            return enumcoll;
        }

        if (enumcoll instanceof Set) {
            return enumcoll;
        }

        return new LinkedHashSet