org.streampipes.manager.matching.output.CustomOutputSchemaGenerator Maven / Gradle / Ivy
/*
* Copyright 2018 FZI Forschungszentrum Informatik
*
* Licensed 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.streampipes.manager.matching.output;
import org.streampipes.manager.selector.PropertySelector;
import org.streampipes.model.SpDataStream;
import org.streampipes.model.output.CustomOutputStrategy;
import org.streampipes.model.output.OutputStrategy;
import org.streampipes.model.output.PropertyRenameRule;
import org.streampipes.model.schema.EventProperty;
import org.streampipes.model.schema.EventSchema;
import org.streampipes.sdk.helpers.Tuple2;
import java.util.List;
public class CustomOutputSchemaGenerator extends OutputSchemaGenerator {
private List selectedPropertyKeys;
public static CustomOutputSchemaGenerator from(OutputStrategy strategy) {
return new CustomOutputSchemaGenerator((CustomOutputStrategy) strategy);
}
public CustomOutputSchemaGenerator(CustomOutputStrategy strategy) {
super(strategy);
this.selectedPropertyKeys = strategy.getSelectedPropertyKeys();
}
@Override
public Tuple2 buildFromOneStream(SpDataStream stream) {
return new Tuple2<>(new EventSchema(new PropertySelector(stream.getEventSchema())
.createPropertyList(selectedPropertyKeys)), outputStrategy);
}
@Override
public Tuple2 buildFromTwoStreams(SpDataStream stream1,
SpDataStream stream2) {
Tuple2, List> generatedOutputProperties = new
PropertySelector(stream1.getEventSchema(),
stream2.getEventSchema()).createRenamedPropertyList(selectedPropertyKeys);
EventSchema outputSchema = new EventSchema(generatedOutputProperties.a);
return new Tuple2<>(outputSchema, getModifiedOutputStrategy(generatedOutputProperties.b));
}
private CustomOutputStrategy getModifiedOutputStrategy(List propertyRenameRules) {
outputStrategy.setRenameRules(propertyRenameRules);
return outputStrategy;
}
}