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1: /* TreeNode.java -- 2: Copyright (C) 2002, 2006, Free Software Foundation, Inc. 3: 4: This file is part of GNU Classpath. 5: 6: GNU Classpath is free software; you can redistribute it and/or modify 7: it under the terms of the GNU General Public License as published by 8: the Free Software Foundation; either version 2, or (at your option) 9: any later version. 10: 11: GNU Classpath is distributed in the hope that it will be useful, but 12: WITHOUT ANY WARRANTY; without even the implied warranty of 13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14: General Public License for more details. 15: 16: You should have received a copy of the GNU General Public License 17: along with GNU Classpath; see the file COPYING. If not, write to the 18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19: 02110-1301 USA. 20: 21: Linking this library statically or dynamically with other modules is 22: making a combined work based on this library. Thus, the terms and 23: conditions of the GNU General Public License cover the whole 24: combination. 25: 26: As a special exception, the copyright holders of this library give you 27: permission to link this library with independent modules to produce an 28: executable, regardless of the license terms of these independent 29: modules, and to copy and distribute the resulting executable under 30: terms of your choice, provided that you also meet, for each linked 31: independent module, the terms and conditions of the license of that 32: module. An independent module is a module which is not derived from 33: or based on this library. If you modify this library, you may extend 34: this exception to your version of the library, but you are not 35: obligated to do so. If you do not wish to do so, delete this 36: exception statement from your version. */ 37: 38: 39: package javax.swing.tree; 40: 41: import java.util.Enumeration; 42: 43: /** 44: * A tree node. 45: * 46: * @author Andrew Selkirk 47: */ 48: public interface TreeNode { 49: 50: /** 51: * Returns the parent node for this tree node, or <code>null</code> if this 52: * node has no parent. 53: * 54: * @return The parent node (possibly <code>null</code>). 55: */ 56: TreeNode getParent(); 57: 58: /** 59: * Returns the index of the specified child node, or -1 if the node is not 60: * in fact a child of this node. 61: * 62: * @param node the node (<code>null</code> not permitted). 63: * 64: * @return The index of the specified child node, or -1. 65: * 66: * @throws IllegalArgumentException if <code>node</code> is <code>null</code>. 67: */ 68: int getIndex(TreeNode node); 69: 70: /** 71: * Returns the child node at the given index. 72: * 73: * @param index the index (in the range <code>0</code> to 74: * <code>getChildCount() - 1</code>). 75: * 76: * @return The child node at the given index. 77: */ 78: TreeNode getChildAt(int index); 79: 80: /** 81: * Returns the number of children for this node. 82: * 83: * @return The number of children for this node. 84: */ 85: int getChildCount(); 86: 87: /** 88: * Returns <code>true</code> if this node allows children, and 89: * <code>false</code> otherwise. 90: * 91: * @return A boolean. 92: */ 93: boolean getAllowsChildren(); 94: 95: /** 96: * Returns <code>true</code> if this node is a leaf node, and 97: * <code>false</code> otherwise. 98: * 99: * @return A boolean. 100: */ 101: boolean isLeaf(); 102: 103: /** 104: * Returns an enumeration of the children of this node, or an empty 105: * enumeration if this node has no children. 106: * 107: * @return An enumeration of the children of this node. 108: */ 109: Enumeration children(); 110: 111: }
GNU Classpath (0.91) |