Examples with Expression org.wso2.siddhi.query.api.expression.Expression used on opensource projects

Example 66 with Expression

use of org.wso2.siddhi.query.api.expression.Expression in project siddhi by wso2.

the class JoinInputStreamParser method setStreamRuntimeProcessorChain.

private static void setStreamRuntimeProcessorChain(MetaStreamEvent metaStreamEvent, SingleStreamRuntime streamRuntime, String inputStreamId, Map<String, Table> tableMap, Map<String, Window> windowMap, Map<String, AggregationRuntime> aggregationMap, List<VariableExpressionExecutor> variableExpressionExecutors, boolean outputExpectsExpiredEvents, String queryName, Within within, Expression per, SiddhiAppContext siddhiAppContext, InputStream inputStream) {
    switch(metaStreamEvent.getEventType()) {
        case TABLE:
            TableWindowProcessor tableWindowProcessor = new TableWindowProcessor(tableMap.get(inputStreamId));
            tableWindowProcessor.initProcessor(metaStreamEvent.getLastInputDefinition(), new ExpressionExecutor[0], null, siddhiAppContext, outputExpectsExpiredEvents, queryName, inputStream);
            streamRuntime.setProcessorChain(tableWindowProcessor);
            break;
        case WINDOW:
            WindowWindowProcessor windowWindowProcessor = new WindowWindowProcessor(windowMap.get(inputStreamId));
            windowWindowProcessor.initProcessor(metaStreamEvent.getLastInputDefinition(), variableExpressionExecutors.toArray(new ExpressionExecutor[0]), null, siddhiAppContext, outputExpectsExpiredEvents, queryName, inputStream);
            streamRuntime.setProcessorChain(windowWindowProcessor);
            break;
        case AGGREGATE:
            AggregationRuntime aggregationRuntime = aggregationMap.get(inputStreamId);
            AggregateWindowProcessor aggregateWindowProcessor = new AggregateWindowProcessor(aggregationRuntime, within, per);
            aggregateWindowProcessor.initProcessor(metaStreamEvent.getLastInputDefinition(), variableExpressionExecutors.toArray(new ExpressionExecutor[0]), null, siddhiAppContext, outputExpectsExpiredEvents, queryName, inputStream);
            streamRuntime.setProcessorChain(aggregateWindowProcessor);
            break;
        case DEFAULT:
            break;
    }
}

Example 67 with Expression

use of org.wso2.siddhi.query.api.expression.Expression in project siddhi by wso2.

the class SelectorParser method parse.

/**
 * Parse Selector portion of a query and return corresponding QuerySelector.
 *
 * @param selector                    selector to be parsed
 * @param outputStream                output stream
 * @param siddhiAppContext            query to be parsed
 * @param metaComplexEvent            Meta event used to collect execution info of stream associated with query
 * @param tableMap                    Table Map
 * @param variableExpressionExecutors variable expression executors
 * @param queryName                   query name of selector belongs to.
 * @param metaPosition                helps to identify the meta position of aggregates
 * @return QuerySelector
 */
public static QuerySelector parse(Selector selector, OutputStream outputStream, SiddhiAppContext siddhiAppContext, MetaComplexEvent metaComplexEvent, Map<String, Table> tableMap, List<VariableExpressionExecutor> variableExpressionExecutors, String queryName, int metaPosition) {
    boolean currentOn = false;
    boolean expiredOn = false;
    String id = null;
    if (outputStream.getOutputEventType() == OutputStream.OutputEventType.CURRENT_EVENTS || outputStream.getOutputEventType() == OutputStream.OutputEventType.ALL_EVENTS) {
        currentOn = true;
    }
    if (outputStream.getOutputEventType() == OutputStream.OutputEventType.EXPIRED_EVENTS || outputStream.getOutputEventType() == OutputStream.OutputEventType.ALL_EVENTS) {
        expiredOn = true;
    }
    id = outputStream.getId();
    containsAggregatorThreadLocal.remove();
    QuerySelector querySelector = new QuerySelector(id, selector, currentOn, expiredOn, siddhiAppContext);
    List<AttributeProcessor> attributeProcessors = getAttributeProcessors(selector, id, siddhiAppContext, metaComplexEvent, tableMap, variableExpressionExecutors, outputStream, queryName, metaPosition);
    querySelector.setAttributeProcessorList(attributeProcessors, "true".equals(containsAggregatorThreadLocal.get()));
    containsAggregatorThreadLocal.remove();
    ConditionExpressionExecutor havingCondition = generateHavingExecutor(selector.getHavingExpression(), metaComplexEvent, siddhiAppContext, tableMap, variableExpressionExecutors, queryName);
    querySelector.setHavingConditionExecutor(havingCondition, "true".equals(containsAggregatorThreadLocal.get()));
    containsAggregatorThreadLocal.remove();
    if (!selector.getGroupByList().isEmpty()) {
        querySelector.setGroupByKeyGenerator(new GroupByKeyGenerator(selector.getGroupByList(), metaComplexEvent, SiddhiConstants.UNKNOWN_STATE, null, variableExpressionExecutors, siddhiAppContext, queryName));
    }
    if (!selector.getOrderByList().isEmpty()) {
        querySelector.setOrderByEventComparator(new OrderByEventComparator(selector.getOrderByList(), metaComplexEvent, SiddhiConstants.HAVING_STATE, null, variableExpressionExecutors, siddhiAppContext, queryName));
    }
    if (selector.getLimit() != null) {
        ExpressionExecutor expressionExecutor = ExpressionParser.parseExpression((Expression) selector.getLimit(), metaComplexEvent, SiddhiConstants.HAVING_STATE, tableMap, variableExpressionExecutors, siddhiAppContext, false, 0, queryName);
        containsAggregatorThreadLocal.remove();
        querySelector.setLimit(((Number) (((ConstantExpressionExecutor) expressionExecutor).getValue())).longValue());
    }
    return querySelector;
}

Example 68 with Expression

use of org.wso2.siddhi.query.api.expression.Expression in project siddhi by wso2.

the class StoreQueryParser method constructStoreQueryRuntime.

private static StoreQueryRuntime constructStoreQueryRuntime(Table table, StoreQuery storeQuery, SiddhiAppContext siddhiAppContext, Map<String, Table> tableMap, String queryName, int metaPosition, Expression onCondition, MetaStreamEvent metaStreamEvent, List<VariableExpressionExecutor> variableExpressionExecutors) {
    metaStreamEvent.setEventType(EventType.TABLE);
    initMetaStreamEvent(metaStreamEvent, table.getTableDefinition());
    MatchingMetaInfoHolder metaStreamInfoHolder = generateMatchingMetaInfoHolder(metaStreamEvent, table.getTableDefinition());
    CompiledCondition compiledCondition = table.compileCondition(onCondition, metaStreamInfoHolder, siddhiAppContext, variableExpressionExecutors, tableMap, queryName);
    if (table instanceof QueryableProcessor) {
        List<Attribute> expectedOutputAttributes = buildExpectedOutputAttributes(storeQuery, siddhiAppContext, tableMap, queryName, metaPosition, metaStreamInfoHolder);
        CompiledSelection compiledSelection = ((QueryableProcessor) table).compileSelection(storeQuery.getSelector(), expectedOutputAttributes, metaStreamInfoHolder, siddhiAppContext, variableExpressionExecutors, tableMap, queryName);
        SelectStoreQueryRuntime storeQueryRuntime = new SelectStoreQueryRuntime((QueryableProcessor) table, compiledCondition, compiledSelection, expectedOutputAttributes, queryName);
        QueryParserHelper.reduceMetaComplexEvent(metaStreamInfoHolder.getMetaStateEvent());
        QueryParserHelper.updateVariablePosition(metaStreamInfoHolder.getMetaStateEvent(), variableExpressionExecutors);
        return storeQueryRuntime;
    } else {
        FindStoreQueryRuntime storeQueryRuntime = new FindStoreQueryRuntime(table, compiledCondition, queryName, metaStreamEvent);
        populateFindStoreQueryRuntime(storeQueryRuntime, metaStreamInfoHolder, storeQuery.getSelector(), variableExpressionExecutors, siddhiAppContext, tableMap, queryName, metaPosition);
        return storeQueryRuntime;
    }
}

Example 69 with Expression

use of org.wso2.siddhi.query.api.expression.Expression in project siddhi by wso2.

the class ConvertFunctionExecutor method init.

@Override
public void init(ExpressionExecutor[] attributeExpressionExecutors, ConfigReader configReader, SiddhiAppContext siddhiAppContext) {
    if (attributeExpressionExecutors.length != 2) {
        throw new SiddhiAppValidationException("convert() must have at 2 parameters, attribute and to be " + "converted type");
    }
    inputType = attributeExpressionExecutors[0].getReturnType();
    if (inputType == Attribute.Type.OBJECT) {
        throw new SiddhiAppValidationException("1st parameter of convert() cannot be 'object' as " + "it's not supported, it has to be either of (STRING, " + "INT, LONG, FLOAT, DOUBLE, BOOL), but found " + attributeExpressionExecutors[0].getReturnType());
    }
    if (attributeExpressionExecutors[1].getReturnType() != Attribute.Type.STRING) {
        throw new SiddhiAppValidationException("2nd parameter of convert() must be 'string' have constant " + "value either of (STRING, INT, LONG, FLOAT, DOUBLE, " + "BOOL), but found " + attributeExpressionExecutors[0].getReturnType());
    }
    if (!(attributeExpressionExecutors[1] instanceof ConstantExpressionExecutor)) {
        throw new SiddhiAppValidationException("2nd parameter of convert() must have constant value either " + "of (STRING, INT, LONG, FLOAT, DOUBLE, BOOL), but found " + "a variable expression");
    }
    String type = (String) attributeExpressionExecutors[1].execute(null);
    if (Attribute.Type.STRING.toString().equalsIgnoreCase(type)) {
        returnType = Attribute.Type.STRING;
    } else if (Attribute.Type.BOOL.toString().equalsIgnoreCase(type)) {
        returnType = Attribute.Type.BOOL;
    } else if (Attribute.Type.DOUBLE.toString().equalsIgnoreCase(type)) {
        returnType = Attribute.Type.DOUBLE;
    } else if (Attribute.Type.FLOAT.toString().equalsIgnoreCase(type)) {
        returnType = Attribute.Type.FLOAT;
    } else if (Attribute.Type.INT.toString().equalsIgnoreCase(type)) {
        returnType = Attribute.Type.INT;
    } else if (Attribute.Type.LONG.toString().equalsIgnoreCase(type)) {
        returnType = Attribute.Type.LONG;
    } else {
        throw new SiddhiAppValidationException("2nd parameter of convert() must have value either of " + "(STRING, INT, LONG, FLOAT, DOUBLE, BOOL), but found '" + type + "'");
    }
}

Example 70 with Expression

use of org.wso2.siddhi.query.api.expression.Expression in project siddhi by wso2.

the class AvgIncrementalAttributeAggregator method init.

@Override
public void init(String attributeName, Attribute.Type attributeType) {
    // Send the relevant attribute to this
    Attribute sum;
    Attribute count;
    Expression sumInitialValue;
    Expression countInitialValue;
    if (attributeName == null) {
        throw new SiddhiAppCreationException("Average incremental attribute aggregation cannot be executed " + "when no parameters are given");
    }
    SumIncrementalAttributeAggregator sumIncrementalAttributeAggregator = new SumIncrementalAttributeAggregator();
    sumIncrementalAttributeAggregator.init(attributeName, attributeType);
    CountIncrementalAttributeAggregator countIncrementalAttributeAggregator = new CountIncrementalAttributeAggregator();
    countIncrementalAttributeAggregator.init(attributeName, attributeType);
    // Only one attribute exists for sum and count
    sum = sumIncrementalAttributeAggregator.getBaseAttributes()[0];
    count = countIncrementalAttributeAggregator.getBaseAttributes()[0];
    // Only one init value exists for sum and count
    sumInitialValue = sumIncrementalAttributeAggregator.getBaseAttributeInitialValues()[0];
    countInitialValue = countIncrementalAttributeAggregator.getBaseAttributeInitialValues()[0];
    this.baseAttributes = new Attribute[] { sum, count };
    this.baseAttributesInitialValues = new Expression[] { sumInitialValue, countInitialValue };
    assert baseAttributes.length == baseAttributesInitialValues.length;
}