| /* |
| * 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.lucene.queries.function.valuesource; |
| |
| import org.apache.lucene.index.LeafReaderContext; |
| import org.apache.lucene.index.Term; |
| import org.apache.lucene.queries.function.FunctionValues; |
| import org.apache.lucene.queries.function.ValueSource; |
| import org.apache.lucene.queries.function.docvalues.DoubleDocValues; |
| import org.apache.lucene.queries.function.docvalues.IntDocValues; |
| import org.apache.lucene.search.IndexSearcher; |
| import org.apache.lucene.util.BytesRef; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| |
| |
| |
| /** |
| * <code>DocFreqValueSource</code> returns the number of documents containing the term. |
| * @lucene.internal |
| */ |
| public class DocFreqValueSource extends ValueSource { |
| protected final String field; |
| protected final String indexedField; |
| protected final String val; |
| protected final BytesRef indexedBytes; |
| |
| public DocFreqValueSource(String field, String val, String indexedField, BytesRef indexedBytes) { |
| this.field = field; |
| this.val = val; |
| this.indexedField = indexedField; |
| this.indexedBytes = indexedBytes; |
| } |
| |
| public String name() { |
| return "docfreq"; |
| } |
| |
| @Override |
| public String description() { |
| return name() + '(' + field + ',' + val + ')'; |
| } |
| |
| @Override |
| public FunctionValues getValues(Map context, LeafReaderContext readerContext) throws IOException { |
| IndexSearcher searcher = (IndexSearcher)context.get("searcher"); |
| int docfreq = searcher.getIndexReader().docFreq(new Term(indexedField, indexedBytes)); |
| return new ConstIntDocValues(docfreq, this); |
| } |
| |
| @Override |
| public void createWeight(Map context, IndexSearcher searcher) throws IOException { |
| context.put("searcher",searcher); |
| } |
| |
| @Override |
| public int hashCode() { |
| return getClass().hashCode() + indexedField.hashCode()*29 + indexedBytes.hashCode(); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this.getClass() != o.getClass()) return false; |
| DocFreqValueSource other = (DocFreqValueSource)o; |
| return this.indexedField.equals(other.indexedField) && this.indexedBytes.equals(other.indexedBytes); |
| } |
| static class ConstIntDocValues extends IntDocValues { |
| final int ival; |
| final float fval; |
| final double dval; |
| final long lval; |
| final String sval; |
| final ValueSource parent; |
| |
| ConstIntDocValues(int val, ValueSource parent) { |
| super(parent); |
| ival = val; |
| fval = val; |
| dval = val; |
| lval = val; |
| sval = Integer.toString(val); |
| this.parent = parent; |
| } |
| |
| @Override |
| public float floatVal(int doc) { |
| return fval; |
| } |
| @Override |
| public int intVal(int doc) { |
| return ival; |
| } |
| @Override |
| public long longVal(int doc) { |
| return lval; |
| } |
| @Override |
| public double doubleVal(int doc) { |
| return dval; |
| } |
| @Override |
| public String strVal(int doc) { |
| return sval; |
| } |
| @Override |
| public String toString(int doc) { |
| return parent.description() + '=' + sval; |
| } |
| } |
| |
| static class ConstDoubleDocValues extends DoubleDocValues { |
| final int ival; |
| final float fval; |
| final double dval; |
| final long lval; |
| final String sval; |
| final ValueSource parent; |
| |
| ConstDoubleDocValues(double val, ValueSource parent) { |
| super(parent); |
| ival = (int)val; |
| fval = (float)val; |
| dval = val; |
| lval = (long)val; |
| sval = Double.toString(val); |
| this.parent = parent; |
| } |
| |
| @Override |
| public float floatVal(int doc) { |
| return fval; |
| } |
| @Override |
| public int intVal(int doc) { |
| return ival; |
| } |
| @Override |
| public long longVal(int doc) { |
| return lval; |
| } |
| @Override |
| public double doubleVal(int doc) { |
| return dval; |
| } |
| @Override |
| public String strVal(int doc) { |
| return sval; |
| } |
| @Override |
| public String toString(int doc) { |
| return parent.description() + '=' + sval; |
| } |
| } |
| } |
| |