Examples with ExpressionExecutor io.siddhi.core.executor.ExpressionExecutor used on opensource projects

Example 51 with ExpressionExecutor

use of io.siddhi.core.executor.ExpressionExecutor in project siddhi by wso2.

the class SortWindowProcessor method init.

@Override
protected StateFactory init(ExpressionExecutor[] attributeExpressionExecutors, ConfigReader configReader, SiddhiQueryContext siddhiQueryContext) {
    if (attributeExpressionExecutors[0].getReturnType() == Attribute.Type.INT) {
        lengthToKeep = Integer.parseInt(String.valueOf(((ConstantExpressionExecutor) attributeExpressionExecutors[0]).getValue()));
    } else {
        throw new UnsupportedOperationException("The first parameter should be an integer");
    }
    parameterInfo = new ArrayList<Object[]>();
    eventComparator = new EventComparator();
    for (int i = 1, parametersLength = attributeExpressionExecutors.length; i < parametersLength; i++) {
        if (!(attributeExpressionExecutors[i] instanceof VariableExpressionExecutor)) {
            throw new UnsupportedOperationException("Required a variable, but found a string parameter");
        } else {
            ExpressionExecutor variableExpressionExecutor = attributeExpressionExecutors[i];
            int order;
            String nextParameter;
            if (i + 1 < parametersLength && attributeExpressionExecutors[i + 1].getReturnType() == Attribute.Type.STRING) {
                nextParameter = (String) ((ConstantExpressionExecutor) attributeExpressionExecutors[i + 1]).getValue();
                if (nextParameter.equalsIgnoreCase(DESC)) {
                    order = -1;
                    i++;
                } else if (nextParameter.equalsIgnoreCase(ASC)) {
                    order = 1;
                    i++;
                } else {
                    throw new UnsupportedOperationException("Parameter string literals should only be \"asc\" or " + "\"desc\"");
                }
            } else {
                // assigning the default order: "asc"
                order = 1;
            }
            parameterInfo.add(new Object[] { variableExpressionExecutor, order });
        }
    }
    return () -> new WindowState();
}

Example 52 with ExpressionExecutor

use of io.siddhi.core.executor.ExpressionExecutor in project siddhi by wso2.

the class EventTestCase method testConditionExpressionExecutors.

@Test
public void testConditionExpressionExecutors() {
    // StreamDefinition streamDefinition = StreamDefinition.id("cseEventStream").attribute("symbol", Attribute
    // .Type.STRING).attribute("price", Attribute.Type.FLOAT).attribute("volume", Attribute.Type.INT);
    VariableExpressionExecutor priceVariableExpressionExecutor = new VariableExpressionExecutor(new Attribute("price", Attribute.Type.FLOAT), 0, 0);
    priceVariableExpressionExecutor.setPosition(new int[] { 0, SiddhiConstants.UNKNOWN_STATE, SiddhiConstants.OUTPUT_DATA_INDEX, 1 });
    VariableExpressionExecutor volumeVariableExpressionExecutor = new VariableExpressionExecutor(new Attribute("volume", Attribute.Type.INT), 0, 0);
    volumeVariableExpressionExecutor.setPosition(new int[] { 0, SiddhiConstants.UNKNOWN_STATE, SiddhiConstants.OUTPUT_DATA_INDEX, 2 });
    ExpressionExecutor compareLessThanExecutor = new LessThanCompareConditionExpressionExecutorFloatFloat(new ConstantExpressionExecutor(10f, Attribute.Type.FLOAT), priceVariableExpressionExecutor);
    ExpressionExecutor compareGreaterThanExecutor = new GreaterThanCompareConditionExpressionExecutorIntInt(new ConstantExpressionExecutor(10, Attribute.Type.INT), volumeVariableExpressionExecutor);
    ExpressionExecutor andExecutor = new AndConditionExpressionExecutor(compareLessThanExecutor, compareGreaterThanExecutor);
    int count = 0;
    for (int i = 0; i < 3; i++) {
        StreamEvent event = new StreamEvent(0, 0, 3);
        event.setOutputData(new Object[] { "WSO2", i * 11f, 5 });
        if ((Boolean) andExecutor.execute(event)) {
            count++;
        }
    }
    AssertJUnit.assertEquals("Two events should pass through executor", 2, count);
}

Example 53 with ExpressionExecutor

use of io.siddhi.core.executor.ExpressionExecutor in project siddhi by wso2.

the class EventTestCase method testExpressionExecutors.

@Test
public void testExpressionExecutors() {
    // StreamDefinition streamDefinition = StreamDefinition.id("cseEventStream").attribute("symbol", Attribute
    // .Type.STRING).attribute("price", Attribute.Type.FLOAT).attribute("volume", Attribute.Type.INT);
    VariableExpressionExecutor priceVariableExpressionExecutor = new VariableExpressionExecutor(new Attribute("price", Attribute.Type.FLOAT), 0, 0);
    priceVariableExpressionExecutor.setPosition(new int[] { 0, SiddhiConstants.UNKNOWN_STATE, SiddhiConstants.OUTPUT_DATA_INDEX, 1 });
    ExpressionExecutor addExecutor = new AddExpressionExecutorFloat(new ConstantExpressionExecutor(10f, Attribute.Type.FLOAT), priceVariableExpressionExecutor);
    StreamEvent event = new StreamEvent(0, 0, 3);
    event.setOutputData(new Object[] { "WSO2", 10f, 5 });
    AssertJUnit.assertEquals("Result of adding should be 20.0", 20f, addExecutor.execute(event));
}