| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF 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.apache.solr.client.solrj.io.eval; |
| |
| import java.io.IOException; |
| import java.util.List; |
| import java.util.Locale; |
| import java.util.stream.Collectors; |
| import org.apache.commons.math3.util.Precision; |
| |
| import org.apache.solr.client.solrj.io.stream.expr.StreamExpression; |
| import org.apache.solr.client.solrj.io.stream.expr.StreamFactory; |
| |
| public class PrecisionEvaluator extends RecursiveObjectEvaluator implements TwoValueWorker { |
| protected static final long serialVersionUID = 1L; |
| |
| public PrecisionEvaluator(StreamExpression expression, StreamFactory factory) throws IOException{ |
| super(expression, factory); |
| |
| if(2 != containedEvaluators.size()){ |
| throw new IOException(String.format(Locale.ROOT,"Invalid expression %s - expecting exactly 2 value but found %d",expression,containedEvaluators.size())); |
| } |
| } |
| |
| @Override |
| public Object doWork(Object value, Object value2) { |
| if(null == value){ |
| return null; |
| } |
| else if(value instanceof List){ |
| return ((List<?>)value).stream().map(innerValue -> doWork(innerValue, ((Number)value2).intValue())).collect(Collectors.toList()); |
| } else if(value instanceof Matrix) { |
| int p = ((Number)value2).intValue(); |
| Matrix matrix = (Matrix)value; |
| double[][] data = matrix.getData(); |
| for(int i=0; i<data.length; ++i) { |
| for(int j=0; j < data[i].length; j++) { |
| data[i][j] = Precision.round(data[i][j], p); |
| } |
| } |
| |
| return matrix; |
| } |
| else{ |
| return Precision.round(((Number)value).doubleValue(), ((Number)value2).intValue()); |
| } |
| } |
| } |