/*******************************************************************************
* Copyright 2017 Capital One Services, LLC and Bitwise, Inc.
* 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 hydrograph.engine.utilities;
import cascading.operation.Insert;
import cascading.pipe.Each;
import cascading.pipe.Pipe;
import cascading.tuple.Fields;
public class ComponentHelper {
/**
* Add field with constant value for each row.
*
* @param <T>
*
* @param inputFile
* @param constantValue
* @return pipe array with appended field
*/
public static <T> Pipe addConstantField(Pipe inputFile, String fieldName, T constantValue) {
inputFile = new Each(inputFile, Fields.ALL, // inputFields,
new Insert(new Fields(fieldName), constantValue), Fields.ALL);
return inputFile;
}
public static String getComponentName(String component, String componentId, String outsocketId) {
if (outsocketId == null || outsocketId.equals(""))
return component + Constants.PIPE_NAME_APPENDER + componentId;
else
return component + Constants.PIPE_NAME_APPENDER + componentId + "_" + outsocketId;
}
}