/*
* Copyright (c) 2016, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
*
* WSO2 Inc. licenses this file to you under the Apache License,
* Version 2.0 (the "License"); you may not use this file except
* in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.wso2.siddhi.core.util.collection.executor;
import org.wso2.siddhi.core.event.ComplexEventChunk;
import org.wso2.siddhi.core.event.state.StateEvent;
import org.wso2.siddhi.core.event.stream.StreamEvent;
import org.wso2.siddhi.core.event.stream.StreamEventCloner;
import org.wso2.siddhi.core.executor.ExpressionExecutor;
import org.wso2.siddhi.core.table.holder.IndexedEventHolder;
import java.util.Collection;
import java.util.HashSet;
/**
* Implementation of {@link CollectionExecutor} which handles non condition
*/
public class NonCollectionExecutor implements CollectionExecutor {
private ExpressionExecutor expressionExecutor;
public NonCollectionExecutor(ExpressionExecutor expressionExecutor) {
this.expressionExecutor = expressionExecutor;
}
public StreamEvent find(StateEvent matchingEvent, IndexedEventHolder indexedEventHolder, StreamEventCloner
storeEventCloner) {
if ((Boolean) expressionExecutor.execute(matchingEvent)) {
ComplexEventChunk<StreamEvent> returnEventChunk = new ComplexEventChunk<StreamEvent>(false);
Collection<StreamEvent> storeEvents = indexedEventHolder.getAllEvents();
for (StreamEvent storeEvent : storeEvents) {
if (storeEventCloner != null) {
returnEventChunk.add(storeEventCloner.copyStreamEvent(storeEvent));
} else {
returnEventChunk.add(storeEvent);
}
}
return returnEventChunk.getFirst();
} else {
return null;
}
}
public Collection<StreamEvent> findEvents(StateEvent matchingEvent, IndexedEventHolder indexedEventHolder) {
if ((Boolean) expressionExecutor.execute(matchingEvent)) {
return indexedEventHolder.getAllEvents();
} else {
return new HashSet<StreamEvent>();
}
}
@Override
public boolean contains(StateEvent matchingEvent, IndexedEventHolder indexedEventHolder) {
return (Boolean) expressionExecutor.execute(matchingEvent);
}
@Override
public void delete(StateEvent deletingEvent, IndexedEventHolder indexedEventHolder) {
if ((Boolean) expressionExecutor.execute(deletingEvent)) {
indexedEventHolder.deleteAll();
}
}
@Override
public Cost getDefaultCost() {
return Cost.MULTI_RETURN_INDEX_MATCHING;
}
}