1 /*
2 * Copyright 2007-2008 Naoki NOSE.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package jp.liq.container.reflect;
17
18 import java.lang.reflect.Field;
19 import java.util.Iterator;
20
21 import jp.liq.container.util.ArrayIterator;
22 import jp.liq.container.util.IteratorWrapper;
23
24 /**
25 * あるクラスが保持するフィールドの中から、
26 * 条件にマッチするものを順に返す Iterable です。
27 * @author nose
28 */
29 public class ClassFieldFinder<T> extends FieldFinder<FieldWrapper, ClassFieldFinder<T>>
30 implements Iterable<FieldWrapper> {
31
32 private final Class<T> ownerClass;
33 /**
34 * このクラスの新しいインスタンスを構築します。
35 * @param ownerClass フィールドを保持するクラス。
36 */
37 public ClassFieldFinder(Class<T> ownerClass) {
38 this.ownerClass = ownerClass;
39
40 }
41
42 /**
43 * @see jp.liq.container.reflect.MemberFinder#getThis()
44 */
45 @Override
46 protected ClassFieldFinder<T> getThis() {
47 return this;
48 }
49
50 @Override
51 protected Iterator<FieldWrapper> getCandidates() {
52 return new FieldWrapperIterator(
53 new ArrayIterator<Field>(ownerClass.getFields()));
54 }
55
56 private class FieldWrapperIterator extends IteratorWrapper<FieldWrapper, Field> {
57 public FieldWrapperIterator(Iterator<Field> iterator) {
58 super(iterator);
59 }
60
61 public FieldWrapper next() {
62 return new FieldWrapper(iterator.next());
63 }
64
65 }
66 }