1 /*
2 * Copyright (C) 2006 uguu@users.sourceforge.jp, All Rights Reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * 3. Neither the name of Clarkware Consulting, Inc. nor the names of its
16 * contributors may be used to endorse or promote products derived
17 * from this software without prior written permission. For written
18 * permission, please contact clarkware@clarkware.com.
19 *
20 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
21 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
22 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
23 * CLARKWARE CONSULTING OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
26 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
29 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 package jp.sourceforge.rpn_computer.node;
33
34 import java.util.ArrayList;
35 import java.util.Iterator;
36 import java.util.List;
37
38 import jp.sourceforge.rpn_computer.RpnNode;
39
40 /**
41 * <p>
42 * ノードの基底抽象クラスです。
43 * </p>
44 *
45 * @author uguu@users.sourceforge.jp
46 */
47 public abstract class AbstractNode implements RpnNode {
48
49 private List nodeList = new ArrayList();
50
51 /**
52 * <p>
53 * 自分の子ノードを追加します。
54 * </p>
55 *
56 * @param node
57 * 子ノード。nullの場合、{@link NullPointerException}例外をスローします。
58 */
59 protected final void addNode(RpnNode node) {
60 if (node == null) {
61 throw new NullPointerException("nodeがnullです。");
62 }
63 this.nodeList.add(node);
64 }
65
66 /**
67 * {@inheritDoc}
68 */
69 public final RpnNode[] getChildren() {
70 return (RpnNode[]) this.nodeList.toArray(new RpnNode[0]);
71 }
72
73 /**
74 * <p>
75 * 子ノードの文字列表現を返します。
76 * </p>
77 *
78 * @return 子ノードの文字列表現。
79 */
80 protected final String toChildrenString() {
81 String str = "";
82 for (Iterator i = this.nodeList.iterator(); i.hasNext();) {
83 RpnNode node = (RpnNode) i.next();
84 String[] nodeString = node.toString().split("\n");
85 for (int j = 0; j < nodeString.length; j++) {
86 str += "\t" + nodeString[j] + "\n";
87 }
88 }
89 return str;
90 }
91 }