| /* |
| * 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.queries.function.FunctionValues; |
| import org.apache.lucene.queries.function.docvalues.DoubleDocValues; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| |
| /** |
| * Function that returns a constant double value for every document. |
| */ |
| public class DoubleConstValueSource extends ConstNumberSource { |
| final double constant; |
| private final float fv; |
| private final long lv; |
| |
| public DoubleConstValueSource(double constant) { |
| this.constant = constant; |
| this.fv = (float)constant; |
| this.lv = (long)constant; |
| } |
| |
| @Override |
| public String description() { |
| return "const(" + constant + ")"; |
| } |
| |
| @Override |
| public FunctionValues getValues(Map context, LeafReaderContext readerContext) throws IOException { |
| return new DoubleDocValues(this) { |
| @Override |
| public float floatVal(int doc) { |
| return fv; |
| } |
| |
| @Override |
| public int intVal(int doc) { |
| return (int) lv; |
| } |
| |
| @Override |
| public long longVal(int doc) { |
| return lv; |
| } |
| |
| @Override |
| public double doubleVal(int doc) { |
| return constant; |
| } |
| |
| @Override |
| public String strVal(int doc) { |
| return Double.toString(constant); |
| } |
| |
| @Override |
| public Object objectVal(int doc) { |
| return constant; |
| } |
| |
| @Override |
| public String toString(int doc) { |
| return description(); |
| } |
| }; |
| } |
| |
| @Override |
| public int hashCode() { |
| long bits = Double.doubleToRawLongBits(constant); |
| return (int)(bits ^ (bits >>> 32)); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (!(o instanceof DoubleConstValueSource)) return false; |
| DoubleConstValueSource other = (DoubleConstValueSource) o; |
| return this.constant == other.constant; |
| } |
| |
| @Override |
| public int getInt() { |
| return (int)lv; |
| } |
| |
| @Override |
| public long getLong() { |
| return lv; |
| } |
| |
| @Override |
| public float getFloat() { |
| return fv; |
| } |
| |
| @Override |
| public double getDouble() { |
| return constant; |
| } |
| |
| @Override |
| public Number getNumber() { |
| return constant; |
| } |
| |
| @Override |
| public boolean getBool() { |
| return constant != 0; |
| } |
| } |