| /* |
| * 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.handler.component; |
| |
| |
| import java.io.IOException; |
| import java.util.Map; |
| |
| import org.apache.lucene.index.LeafReaderContext; |
| import org.apache.lucene.util.BytesRef; |
| import org.apache.solr.common.util.NamedList; |
| |
| /** |
| * StatsValue defines the interface for the collection of statistical values about fields and facets. |
| */ |
| // TODO: should implement Collector? |
| public interface StatsValues { |
| |
| /** |
| * Accumulate the values based on those in the given NamedList |
| * |
| * @param stv NamedList whose values will be used to accumulate the current values |
| */ |
| void accumulate(@SuppressWarnings({"rawtypes"})NamedList stv); |
| |
| /** Accumulate the value associated with <code>docID</code>. |
| * @see #setNextReader(org.apache.lucene.index.LeafReaderContext) */ |
| void accumulate(int docID) throws IOException; |
| |
| /** |
| * Accumulate the values based on the given value |
| * |
| * @param value Value to use to accumulate the current values |
| * @param count number of times to accumulate this value |
| */ |
| void accumulate(BytesRef value, int count); |
| |
| /** |
| * Updates the statistics when a document is missing a value |
| */ |
| void missing(); |
| |
| /** |
| * Updates the statistics when multiple documents are missing a value |
| * |
| * @param count number of times to count a missing value |
| */ |
| void addMissing(int count); |
| |
| /** |
| * Adds the facet statistics for the facet with the given name |
| * |
| * @param facetName Name of the facet |
| * @param facetValues Facet statistics on a per facet value basis |
| */ |
| void addFacet(String facetName, Map<String, StatsValues> facetValues); |
| |
| /** |
| * Translates the values into a NamedList representation |
| * |
| * @return NamedList representation of the current values |
| */ |
| NamedList<?> getStatsValues(); |
| |
| /** Set the context for {@link #accumulate(int)}. */ |
| void setNextReader(LeafReaderContext ctx) throws IOException; |
| } |