| /* |
| * 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 java.io.IOException; |
| import java.util.Map; |
| |
| import org.apache.lucene.index.LeafReaderContext; |
| import org.apache.lucene.index.DocValues; |
| import org.apache.lucene.index.NumericDocValues; |
| import org.apache.lucene.queries.function.FunctionValues; |
| import org.apache.lucene.queries.function.docvalues.IntDocValues; |
| import org.apache.lucene.search.SortField; |
| import org.apache.lucene.search.SortField.Type; |
| import org.apache.lucene.util.mutable.MutableValue; |
| import org.apache.lucene.util.mutable.MutableValueInt; |
| |
| /** |
| * Obtains int field values from {@link org.apache.lucene.index.LeafReader#getNumericDocValues} and makes those |
| * values available as other numeric types, casting as needed. |
| */ |
| public class IntFieldSource extends FieldCacheSource { |
| |
| public IntFieldSource(String field) { |
| super(field); |
| } |
| |
| @Override |
| public String description() { |
| return "int(" + field + ')'; |
| } |
| |
| @Override |
| public SortField getSortField(boolean reverse) { |
| return new SortField(field, Type.INT, reverse); |
| } |
| |
| @Override |
| public FunctionValues getValues(Map context, LeafReaderContext readerContext) throws IOException { |
| |
| final NumericDocValues arr = getNumericDocValues(context, readerContext); |
| |
| return new IntDocValues(this) { |
| int lastDocID; |
| |
| private int getValueForDoc(int doc) throws IOException { |
| if (doc < lastDocID) { |
| throw new IllegalArgumentException("docs were sent out-of-order: lastDocID=" + lastDocID + " vs docID=" + doc); |
| } |
| lastDocID = doc; |
| int curDocID = arr.docID(); |
| if (doc > curDocID) { |
| curDocID = arr.advance(doc); |
| } |
| if (doc == curDocID) { |
| return (int) arr.longValue(); |
| } else { |
| return 0; |
| } |
| } |
| |
| @Override |
| public int intVal(int doc) throws IOException { |
| return getValueForDoc(doc); |
| } |
| |
| @Override |
| public String strVal(int doc) throws IOException { |
| return Integer.toString(intVal(doc)); |
| } |
| |
| @Override |
| public boolean exists(int doc) throws IOException { |
| getValueForDoc(doc); |
| return arr.docID() == doc; |
| } |
| |
| @Override |
| public ValueFiller getValueFiller() { |
| return new ValueFiller() { |
| private final MutableValueInt mval = new MutableValueInt(); |
| |
| @Override |
| public MutableValue getValue() { |
| return mval; |
| } |
| |
| @Override |
| public void fillValue(int doc) throws IOException { |
| mval.value = getValueForDoc(doc); |
| mval.exists = arr.docID() == doc; |
| } |
| }; |
| } |
| }; |
| } |
| |
| protected NumericDocValues getNumericDocValues(Map context, LeafReaderContext readerContext) throws IOException { |
| return DocValues.getNumeric(readerContext.reader(), field); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (o.getClass() != IntFieldSource.class) return false; |
| IntFieldSource other = (IntFieldSource)o; |
| return super.equals(other); |
| } |
| |
| @Override |
| public int hashCode() { |
| int h = Integer.class.hashCode(); |
| h += super.hashCode(); |
| return h; |
| } |
| } |