TestEnumMinMax.java

/*
 * *************************************************************************************
 *  Copyright (C) 2008 EsperTech, Inc. All rights reserved.                            *
 *  http://esper.codehaus.org                                                          *
 *  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.regression.enummethod;

import com.espertech.esper.client.*;
import com.espertech.esper.client.scopetest.EPAssertionUtil;
import com.espertech.esper.client.scopetest.SupportUpdateListener;
import com.espertech.esper.support.bean.SupportBean_ST0_Container;
import com.espertech.esper.support.bean.SupportCollection;
import com.espertech.esper.support.bean.lambda.LambdaAssertionUtil;
import com.espertech.esper.support.client.SupportConfigFactory;
import junit.framework.TestCase;

import java.math.BigDecimal;

public class TestEnumMinMax extends TestCase {

    private EPServiceProvider epService;
    private SupportUpdateListener listener;

    public void setUp() {

        Configuration config = SupportConfigFactory.getConfiguration();
        config.addEventType("Bean", SupportBean_ST0_Container.class);
        config.addEventType("SupportCollection", SupportCollection.class);
        epService = EPServiceProviderManager.getDefaultProvider(config);
        epService.initialize();
        listener = new SupportUpdateListener();
    }

    protected void tearDown() throws Exception {
        listener = null;
    }

    public void testMinMaxScalarWithLambda() {

        epService.getEPAdministrator().getConfiguration().addPlugInSingleRowFunction("extractNum", MyService.class.getName(), "extractNum");

        String[] fields = "val0,val1,val2,val3".split(",");
        String eplFragment = "select " +
                "strvals.min(v => extractNum(v)) as val0, " +
                "strvals.max(v => extractNum(v)) as val1, " +
                "strvals.min(v => v) as val2, " +
                "strvals.max(v => v) as val3 " +
                "from SupportCollection";
        EPStatement stmtFragment = epService.getEPAdministrator().createEPL(eplFragment);
        stmtFragment.addListener(listener);
        LambdaAssertionUtil.assertTypes(stmtFragment.getEventType(), fields, new Class[]{Integer.class, Integer.class, String.class, String.class});

        epService.getEPRuntime().sendEvent(SupportCollection.makeString("E2,E1,E5,E4"));
        EPAssertionUtil.assertProps(listener.assertOneGetNewAndReset(), fields, new Object[]{1, 5, "E1", "E5"});

        epService.getEPRuntime().sendEvent(SupportCollection.makeString("E1"));
        EPAssertionUtil.assertProps(listener.assertOneGetNewAndReset(), fields, new Object[]{1, 1, "E1", "E1"});

        epService.getEPRuntime().sendEvent(SupportCollection.makeString(null));
        EPAssertionUtil.assertProps(listener.assertOneGetNewAndReset(), fields, new Object[]{null, null, null, null});

        epService.getEPRuntime().sendEvent(SupportCollection.makeString(""));
        EPAssertionUtil.assertProps(listener.assertOneGetNewAndReset(), fields, new Object[]{null, null, null, null});
    }

    public void testMinMaxEvents() {

        String[] fields = "val0,val1".split(",");
        String eplFragment = "select " +
                "contained.min(x => p00) as val0, " +
                "contained.max(x => p00) as val1 " +
                "from Bean";
        EPStatement stmtFragment = epService.getEPAdministrator().createEPL(eplFragment);
        stmtFragment.addListener(listener);
        LambdaAssertionUtil.assertTypes(stmtFragment.getEventType(), fields, new Class[]{Integer.class, Integer.class});

        epService.getEPRuntime().sendEvent(SupportBean_ST0_Container.make2Value("E1,12", "E2,11", "E2,2"));
        EPAssertionUtil.assertProps(listener.assertOneGetNewAndReset(), fields, new Object[]{2, 12});

        epService.getEPRuntime().sendEvent(SupportBean_ST0_Container.make2Value("E1,12", "E2,0", "E2,2"));
        EPAssertionUtil.assertProps(listener.assertOneGetNewAndReset(), fields, new Object[]{0, 12});

        epService.getEPRuntime().sendEvent(SupportBean_ST0_Container.make2Value(null));
        EPAssertionUtil.assertProps(listener.assertOneGetNewAndReset(), fields, new Object[]{null, null});

        epService.getEPRuntime().sendEvent(SupportBean_ST0_Container.make2Value());
        EPAssertionUtil.assertProps(listener.assertOneGetNewAndReset(), fields, new Object[]{null, null});
    }

    public void testMinMaxScalar() {

        String[] fields = "val0,val1".split(",");
        String eplFragment = "select " +
                "strvals.min() as val0, " +
                "strvals.max() as val1 " +
                "from SupportCollection";
        EPStatement stmtFragment = epService.getEPAdministrator().createEPL(eplFragment);
        stmtFragment.addListener(listener);
        LambdaAssertionUtil.assertTypes(stmtFragment.getEventType(), fields, new Class[]{String.class, String.class});

        epService.getEPRuntime().sendEvent(SupportCollection.makeString("E2,E1,E5,E4"));
        EPAssertionUtil.assertProps(listener.assertOneGetNewAndReset(), fields, new Object[]{"E1", "E5"});

        epService.getEPRuntime().sendEvent(SupportCollection.makeString("E1"));
        EPAssertionUtil.assertProps(listener.assertOneGetNewAndReset(), fields, new Object[]{"E1", "E1"});

        epService.getEPRuntime().sendEvent(SupportCollection.makeString(null));
        EPAssertionUtil.assertProps(listener.assertOneGetNewAndReset(), fields, new Object[]{null, null});

        epService.getEPRuntime().sendEvent(SupportCollection.makeString(""));
        EPAssertionUtil.assertProps(listener.assertOneGetNewAndReset(), fields, new Object[]{null, null});
    }

    public void testInvalid() {
        String epl;

        epl = "select contained.min() from Bean";
        tryInvalid(epl, "Error starting statement: Invalid input for built-in enumeration method 'min' and 0-parameter footprint, expecting collection of values (typically scalar values) as input, received collection of events of type 'com.espertech.esper.support.bean.SupportBean_ST0' [select contained.min() from Bean]");
    }

    private void tryInvalid(String epl, String message) {
        try
        {
            epService.getEPAdministrator().createEPL(epl);
            fail();
        }
        catch (EPStatementException ex) {
            assertEquals(message, ex.getMessage());
        }
    }

    public static class MyService {
        public static int extractNum(String arg) { return Integer.parseInt(arg.substring(1)); }
        public static BigDecimal extractBigDecimal(String arg) { return new BigDecimal(arg.substring(1)); }
    }
}