| /* |
| * 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.analytics.function.mapping; |
| |
| import org.apache.solr.analytics.ExpressionFactory.CreatorFunction; |
| import org.apache.solr.analytics.value.AnalyticsValueStream; |
| import org.apache.solr.analytics.value.DateValue; |
| import org.apache.solr.analytics.value.DateValueStream; |
| import org.apache.solr.analytics.value.DoubleValue; |
| import org.apache.solr.analytics.value.DoubleValueStream; |
| import org.apache.solr.analytics.value.FloatValue; |
| import org.apache.solr.analytics.value.FloatValueStream; |
| import org.apache.solr.analytics.value.IntValue; |
| import org.apache.solr.analytics.value.IntValueStream; |
| import org.apache.solr.analytics.value.LongValue; |
| import org.apache.solr.analytics.value.LongValueStream; |
| import org.apache.solr.analytics.value.StringValue; |
| import org.apache.solr.analytics.value.StringValueStream; |
| import org.apache.solr.common.SolrException; |
| import org.apache.solr.common.SolrException.ErrorCode; |
| |
| /** |
| * A bottom mapping function, returning the lowest value found. |
| * <p> |
| * Uses: |
| * <ul> |
| * <li>If a single comparable ValueStream is passed in, a Value (of the same type) representing the minimum of the values for each document is returned. |
| * <li>If multiple comparable Values are passed in, a Value (of the same type) representing the minimum of all values is returned. |
| * </ul> |
| */ |
| public class BottomFunction { |
| public static final String name = "bottom"; |
| public static final CreatorFunction creatorFunction = (params -> { |
| if (params.length == 0) { |
| throw new SolrException(ErrorCode.BAD_REQUEST,"The "+name+" function requires paramaters."); |
| } |
| AnalyticsValueStream param = params[0]; |
| if (param instanceof DateValueStream) { |
| if (params.length == 1) { |
| return LambdaFunction.createDateLambdaFunction(name, (a,b) -> (a<b)? a:b, (DateValueStream)param); |
| } |
| DateValue[] castedParams = new DateValue[params.length]; |
| boolean tryNextType = false; |
| for (int i = 0; i < params.length; i++) { |
| if (params[i] instanceof DateValue) { |
| castedParams[i] = (DateValue) params[i]; |
| } else { |
| tryNextType = true; |
| break; |
| } |
| } |
| if (!tryNextType) { |
| return LambdaFunction.createDateLambdaFunction(name, (a,b) -> (a<b)? a:b, castedParams, false); |
| } |
| } |
| if (param instanceof IntValueStream) { |
| if (params.length == 1) { |
| return LambdaFunction.createIntLambdaFunction(name, (a,b) -> (a<b)? a:b, (IntValueStream)param); |
| } |
| IntValue[] castedParams = new IntValue[params.length]; |
| boolean tryNextType = false; |
| for (int i = 0; i < params.length; i++) { |
| if (params[i] instanceof IntValue) { |
| castedParams[i] = (IntValue) params[i]; |
| } else { |
| tryNextType = true; |
| break; |
| } |
| } |
| if (!tryNextType) { |
| return LambdaFunction.createIntLambdaFunction(name, (a,b) -> (a<b)? a:b, castedParams, false); |
| } |
| } |
| if (param instanceof LongValueStream) { |
| if (params.length == 1) { |
| return LambdaFunction.createLongLambdaFunction(name, (a,b) -> (a<b)? a:b, (LongValueStream)param); |
| } |
| LongValue[] castedParams = new LongValue[params.length]; |
| boolean tryNextType = false; |
| for (int i = 0; i < params.length; i++) { |
| if (params[i] instanceof LongValue) { |
| castedParams[i] = (LongValue) params[i]; |
| } else { |
| tryNextType = true; |
| break; |
| } |
| } |
| if (!tryNextType) { |
| return LambdaFunction.createLongLambdaFunction(name, (a,b) -> (a<b)? a:b, castedParams, false); |
| } |
| } |
| if (param instanceof FloatValueStream) { |
| if (params.length == 1) { |
| return LambdaFunction.createFloatLambdaFunction(name, (a,b) -> (a<b)? a:b, (FloatValueStream)param); |
| } |
| FloatValue[] castedParams = new FloatValue[params.length]; |
| boolean tryNextType = false; |
| for (int i = 0; i < params.length; i++) { |
| if (params[i] instanceof FloatValue) { |
| castedParams[i] = (FloatValue) params[i]; |
| } else { |
| tryNextType = true; |
| break; |
| } |
| } |
| if (!tryNextType) { |
| return LambdaFunction.createFloatLambdaFunction(name, (a,b) -> (a<b)? a:b, castedParams, false); |
| } |
| } |
| if (param instanceof DoubleValueStream) { |
| if (params.length == 1) { |
| return LambdaFunction.createDoubleLambdaFunction(name, (a,b) -> (a<b)? a:b, (DoubleValueStream)param); |
| } |
| DoubleValue[] castedParams = new DoubleValue[params.length]; |
| boolean tryNextType = false; |
| for (int i = 0; i < params.length; i++) { |
| if (params[i] instanceof DoubleValue) { |
| castedParams[i] = (DoubleValue) params[i]; |
| } else { |
| tryNextType = true; |
| break; |
| } |
| } |
| if (!tryNextType) { |
| return LambdaFunction.createDoubleLambdaFunction(name, (a,b) -> (a<b)? a:b, castedParams, false); |
| } |
| } |
| if (param instanceof StringValueStream) { |
| if (params.length == 1) { |
| return LambdaFunction.createStringLambdaFunction(name, (a,b) -> (a.compareTo(b)<0)? a:b, (StringValueStream)param); |
| } |
| StringValue[] castedParams = new StringValue[params.length]; |
| boolean tryNextType = false; |
| for (int i = 0; i < params.length; i++) { |
| if (params[i] instanceof StringValue) { |
| castedParams[i] = (StringValue) params[i]; |
| } else { |
| tryNextType = true; |
| break; |
| } |
| } |
| if (!tryNextType) { |
| return LambdaFunction.createStringLambdaFunction(name, (a,b) -> (a.compareTo(b)<0)? a:b, castedParams, false); |
| } |
| } |
| throw new SolrException(ErrorCode.BAD_REQUEST,"The "+name+" function requires a comparable parameter. " + |
| "Incorrect parameter: "+params[0].getExpressionStr()); |
| }); |
| } |