| package org.apache.lucene.queries.function.valuesource; |
| /* |
| * 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. |
| */ |
| |
| import java.io.IOException; |
| import java.util.Map; |
| |
| import org.apache.lucene.index.AtomicReaderContext; |
| import org.apache.lucene.queries.function.FunctionValues; |
| import org.apache.lucene.search.FieldCache; |
| |
| /** |
| * Obtains int field values from the {@link org.apache.lucene.search.FieldCache} |
| * using <code>getInts()</code> |
| * and makes those values available as other numeric types, casting as needed. * |
| * |
| * |
| */ |
| |
| public class ByteFieldSource extends FieldCacheSource { |
| |
| private final FieldCache.ByteParser parser; |
| |
| public ByteFieldSource(String field) { |
| this(field, null); |
| } |
| |
| public ByteFieldSource(String field, FieldCache.ByteParser parser) { |
| super(field); |
| this.parser = parser; |
| } |
| |
| @Override |
| public String description() { |
| return "byte(" + field + ')'; |
| } |
| |
| @Override |
| public FunctionValues getValues(Map context, AtomicReaderContext readerContext) throws IOException { |
| final FieldCache.Bytes arr = cache.getBytes(readerContext.reader(), field, parser, false); |
| |
| return new FunctionValues() { |
| @Override |
| public byte byteVal(int doc) { |
| return arr.get(doc); |
| } |
| |
| @Override |
| public short shortVal(int doc) { |
| return (short) arr.get(doc); |
| } |
| |
| @Override |
| public float floatVal(int doc) { |
| return (float) arr.get(doc); |
| } |
| |
| @Override |
| public int intVal(int doc) { |
| return (int) arr.get(doc); |
| } |
| |
| @Override |
| public long longVal(int doc) { |
| return (long) arr.get(doc); |
| } |
| |
| @Override |
| public double doubleVal(int doc) { |
| return (double) arr.get(doc); |
| } |
| |
| @Override |
| public String strVal(int doc) { |
| return Byte.toString(arr.get(doc)); |
| } |
| |
| @Override |
| public String toString(int doc) { |
| return description() + '=' + byteVal(doc); |
| } |
| |
| @Override |
| public Object objectVal(int doc) { |
| return arr.get(doc); // TODO: valid? |
| } |
| |
| }; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (o.getClass() != ByteFieldSource.class) return false; |
| ByteFieldSource |
| other = (ByteFieldSource) o; |
| return super.equals(other) |
| && (this.parser == null ? other.parser == null : |
| this.parser.getClass() == other.parser.getClass()); |
| } |
| |
| @Override |
| public int hashCode() { |
| int h = parser == null ? Byte.class.hashCode() : parser.getClass().hashCode(); |
| h += super.hashCode(); |
| return h; |
| } |
| } |