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;
}
}