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 }