01: /**
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */package org.apache.solr.search.function;
17:
18: import org.apache.lucene.search.FieldCache;
19:
20: /**
21: * A base class for ValueSource implementations that retrieve values for
22: * a single field from the {@link org.apache.lucene.search.FieldCache}.
23: *
24: * @author yonik
25: * @version $Id: FieldCacheSource.java 472574 2006-11-08 18:25:52Z yonik $
26: */
27: public abstract class FieldCacheSource extends ValueSource {
28: protected String field;
29: protected FieldCache cache = FieldCache.DEFAULT;
30:
31: public FieldCacheSource(String field) {
32: this .field = field;
33: }
34:
35: public void setFieldCache(FieldCache cache) {
36: this .cache = cache;
37: }
38:
39: public FieldCache getFieldCache() {
40: return cache;
41: }
42:
43: public String description() {
44: return field;
45: }
46:
47: public boolean equals(Object o) {
48: if (!(o instanceof FieldCacheSource))
49: return false;
50: FieldCacheSource other = (FieldCacheSource) o;
51: return this .field.equals(other.field)
52: && this .cache == other.cache;
53: }
54:
55: public int hashCode() {
56: return cache.hashCode() + field.hashCode();
57: };
58:
59: }
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