+++ /dev/null
-package org.apache.lucene.search.function;
-
-/**
- * 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 org.apache.lucene.index.IndexReader;
-import org.apache.lucene.search.FieldCache;
-import org.apache.lucene.search.function.DocValues;
-
-import java.io.IOException;
-
-/**
- * Expert: obtains single byte field values from the
- * {@link org.apache.lucene.search.FieldCache FieldCache}
- * using <code>getBytes()</code> and makes those values
- * available as other numeric types, casting as needed.
- *
- * @lucene.experimental
- *
- * @see org.apache.lucene.search.function.FieldCacheSource for requirements
- * on the field.
- *
- * <p><b>NOTE</b>: with the switch in 2.9 to segment-based
- * searching, if {@link #getValues} is invoked with a
- * composite (multi-segment) reader, this can easily cause
- * double RAM usage for the values in the FieldCache. It's
- * best to switch your application to pass only atomic
- * (single segment) readers to this API.</p>
- */
-public class ByteFieldSource extends FieldCacheSource {
- private FieldCache.ByteParser parser;
-
- /**
- * Create a cached byte field source with default string-to-byte parser.
- */
- public ByteFieldSource(String field) {
- this(field, null);
- }
-
- /**
- * Create a cached byte field source with a specific string-to-byte parser.
- */
- public ByteFieldSource(String field, FieldCache.ByteParser parser) {
- super(field);
- this.parser = parser;
- }
-
- /*(non-Javadoc) @see org.apache.lucene.search.function.ValueSource#description() */
- @Override
- public String description() {
- return "byte(" + super.description() + ')';
- }
-
- /*(non-Javadoc) @see org.apache.lucene.search.function.FieldCacheSource#getCachedValues(org.apache.lucene.search.FieldCache, java.lang.String, org.apache.lucene.index.IndexReader) */
- @Override
- public DocValues getCachedFieldValues (FieldCache cache, String field, IndexReader reader) throws IOException {
- final byte[] arr = cache.getBytes(reader, field, parser);
- return new DocValues() {
- /*(non-Javadoc) @see org.apache.lucene.search.function.DocValues#floatVal(int) */
- @Override
- public float floatVal(int doc) {
- return arr[doc];
- }
- /*(non-Javadoc) @see org.apache.lucene.search.function.DocValues#intVal(int) */
- @Override
- public int intVal(int doc) {
- return arr[doc];
- }
- /*(non-Javadoc) @see org.apache.lucene.search.function.DocValues#toString(int) */
- @Override
- public String toString(int doc) {
- return description() + '=' + intVal(doc);
- }
- /*(non-Javadoc) @see org.apache.lucene.search.function.DocValues#getInnerArray() */
- @Override
- Object getInnerArray() {
- return arr;
- }
- };
- }
-
- /*(non-Javadoc) @see org.apache.lucene.search.function.FieldCacheSource#cachedFieldSourceEquals(org.apache.lucene.search.function.FieldCacheSource) */
- @Override
- public boolean cachedFieldSourceEquals(FieldCacheSource o) {
- if (o.getClass() != ByteFieldSource.class) {
- return false;
- }
- ByteFieldSource other = (ByteFieldSource)o;
- return this.parser==null ?
- other.parser==null :
- this.parser.getClass() == other.parser.getClass();
- }
-
- /*(non-Javadoc) @see org.apache.lucene.search.function.FieldCacheSource#cachedFieldSourceHashCode() */
- @Override
- public int cachedFieldSourceHashCode() {
- return parser==null ?
- Byte.class.hashCode() : parser.getClass().hashCode();
- }
-
-}