| /* |
| * 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.stream.metrics; |
| |
| import java.io.IOException; |
| import java.util.UUID; |
| |
| import org.apache.solr.client.solrj.io.Tuple; |
| import org.apache.solr.client.solrj.io.stream.expr.Explanation; |
| import org.apache.solr.client.solrj.io.stream.expr.Explanation.ExpressionType; |
| import org.apache.solr.client.solrj.io.stream.expr.Expressible; |
| import org.apache.solr.client.solrj.io.stream.expr.StreamFactory; |
| |
| public abstract class Metric implements Expressible { |
| |
| private UUID metricNodeId = UUID.randomUUID(); |
| private String functionName; |
| private String identifier; |
| public boolean outputLong; // This is only used for SQL in facet mode. |
| |
| public String getFunctionName(){ |
| return functionName; |
| } |
| |
| public void setFunctionName(String functionName){ |
| this.functionName = functionName; |
| } |
| |
| public String getIdentifier(){ |
| return identifier; |
| } |
| public void setIdentifier(String identifier){ |
| this.identifier = identifier; |
| } |
| public void setIdentifier(String ... identifierParts){ |
| StringBuilder sb = new StringBuilder(); |
| for(String part : identifierParts){ |
| sb.append(part); |
| } |
| this.identifier = sb.toString(); |
| } |
| |
| @Override |
| public Explanation toExplanation(StreamFactory factory) throws IOException { |
| return new Explanation(getMetricNodeId().toString()) |
| .withFunctionName(functionName) |
| .withImplementingClass(getClass().getName()) |
| .withExpression(toExpression(factory).toString()) |
| .withExpressionType(ExpressionType.METRIC); |
| } |
| |
| public UUID getMetricNodeId(){ |
| return metricNodeId; |
| } |
| |
| public abstract Number getValue(); |
| public abstract void update(Tuple tuple); |
| public abstract Metric newInstance(); |
| public abstract String[] getColumns(); |
| |
| } |