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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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package org.apache.solr.search.function;
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import org.apache.lucene.index.IndexReader;
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import java.io.IOException;
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/** A simple float function with a single argument
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public abstract class SimpleFloatFunction extends SingleFunction {
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public SimpleFloatFunction(ValueSource source) {
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protected abstract float func(int doc, DocValues vals);
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public DocValues getValues(Map context, IndexReader reader) throws IOException {
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final DocValues vals = source.getValues(context, reader);
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return new DocValues() {
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public float floatVal(int doc) {
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return func(doc, vals);
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public int intVal(int doc) {
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return (int)floatVal(doc);
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public long longVal(int doc) {
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return (long)floatVal(doc);
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public double doubleVal(int doc) {
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return (double)floatVal(doc);
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public String strVal(int doc) {
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return Float.toString(floatVal(doc));
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public String toString(int doc) {
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return name() + '(' + vals.toString(doc) + ')';