/******************************************************************************* * 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.transformation.userfunctions.transform; import hydrograph.engine.transformation.userfunctions.base.ReusableRow; import hydrograph.engine.transformation.userfunctions.base.TransformBase; import java.util.ArrayList; import java.util.Properties; import static hydrograph.engine.transformation.standardfunctions.NumericFunctions.getDoubleFromComparable; /** * The Class LibSVMFormat. * * @author Bitwise * */ public class LibSVMFormat implements TransformBase{ @Override public void prepare(Properties props, ArrayList<String> inputFields, ArrayList<String> outputFields) { } @Override public void transform(ReusableRow inputRow, ReusableRow outputRow) { String svmRecord=""; String label=getDoubleFromComparable(inputRow.getField(0)).toString(); for(int i=1;i<inputRow.getFields().size();i++){ svmRecord=svmRecord + i + ":" + getDoubleFromComparable(inputRow.getField(i)) + " "; } svmRecord=svmRecord.substring(0,svmRecord.length()-1); svmRecord=label + " " + svmRecord; outputRow.setField(0, svmRecord); } @Override public void cleanup() { } }