001 /* EVolve - an Extensible Software Visualization Framework 002 * Copyright (C) 2001-2002 Qin Wang 003 * 004 * This library is free software; you can redistribute it and/or 005 * modify it under the terms of the GNU Library General Public 006 * License as published by the Free Software Foundation; either 007 * version 2 of the License, or (at your option) any later version. 008 * 009 * This library is distributed in the hope that it will be useful, 010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 012 * Library General Public License for more details. 013 * 014 * You should have received a copy of the GNU Library General Public 015 * License along with this library; if not, write to the 016 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 017 * Boston, MA 02111-1307, USA. 018 */ 019 020 /* 021 * EVolve is distributed at http://www.sable.mcgill.ca/EVolve/ 022 */ 023 024 package EVolve.data; 025 026 import java.util.HashMap; 027 import java.util.HashSet; 028 import java.util.Iterator; 029 030 import EVolve.Scene; 031 import EVolve.util.HelperFuncs; 032 033 public class ReferenceLink implements Cloneable{ 034 private String name; // name of the link 035 private int sourceType; // type of the source element 036 private int sourceIndex; // field index of the source element 037 private int targetType; // type of the target entity 038 private HashMap target; // id of the targets 039 private String description; // description of the link 040 private HashSet properties; 041 042 /** 043 * Creates a reference link. 044 * 045 * @param name name of the link 046 * @param sourceType type of the source element 047 * @param sourceIndex field index of the source element 048 * @param targetType type of the target entity 049 * @param description description of the link 050 * @param properties properties of the link 051 */ 052 public ReferenceLink(String name, int sourceType, int sourceIndex, int targetType, String description, String[] properties) { 053 this.name = name; 054 this.sourceType = sourceType; 055 this.sourceIndex = sourceIndex; 056 this.targetType = targetType; 057 this.description = description; 058 this.properties = new HashSet(); 059 for (int i=0; i<properties.length; i++) 060 this.properties.add(properties[i]); 061 if (properties.length == 0) 062 this.properties.add("reference"); 063 064 target = Scene.getDataManager().getEntity()[targetType]; 065 /*target = new int[Scene.getDataManager().getEntity()[targetType].length]; 066 for (int i = 0; i < target.length; i++) { 067 target[i] = i; 068 }*/ 069 } 070 071 /** 072 * Creates a reference link by combining two reference links. 073 * 074 * @param from where the link starts 075 * @param to where the link ends 076 */ 077 public ReferenceLink(ReferenceLink from, ReferenceLink to) { 078 this.name = to.name; 079 this.sourceType = from.sourceType; 080 this.sourceIndex = from.sourceIndex; 081 this.targetType = to.targetType; 082 this.description = from.description + " >>> " + to.description; 083 084 /*target = new int[from.target.length]; 085 for (int i = 0; i < target.length; i++) { 086 target[i] = to.target[Scene.getDataManager().getEntity()[from.targetType][from.target[i]].getField()[to.sourceIndex]]; 087 }*/ 088 target = new HashMap(); 089 Iterator it = from.target.keySet().iterator(); 090 while (it.hasNext()) { 091 Object key = it.next(); 092 Object fromKey = new Long(((Entity)from.target.get(key)).getField()[to.sourceIndex]); 093 Entity entity = (Entity)Scene.getDataManager().getEntity()[from.targetType].get(fromKey); 094 target.put(key,entity); 095 } 096 this.properties = HelperFuncs.cloneHashSet(from.properties); 097 } 098 099 /** 100 * Gets the name of the link. 101 * 102 * @return name of the link 103 */ 104 public String getName() { 105 return name; 106 } 107 108 /** 109 * Gets the type of the source element. 110 * 111 * @return type of the source element 112 */ 113 public int getSourceType() { 114 return sourceType; 115 } 116 117 /** 118 * Gets the field index of the source element. 119 * 120 * @return field index of the source element 121 */ 122 public int getSourceIndex() { 123 return sourceIndex; 124 } 125 126 /** 127 * Gets the type of the target entity. 128 * 129 * @return type of the target entity 130 */ 131 public int getTargetType() { 132 return targetType; 133 } 134 135 /** 136 * Gets the target. 137 * 138 * @param source reference 139 * @return target 140 */ 141 public long getTarget(long source) { 142 return ((Entity)target.get(new Long(source))).getId(); 143 } 144 145 /** 146 * Gets the description of the link. 147 * 148 * @return description of the link 149 */ 150 public String getDescription() { 151 return description; 152 } 153 154 public boolean hasProperty(String property) { 155 return properties.contains(property); 156 } 157 158 public Object clone() { 159 ReferenceLink o = null; 160 try { 161 o = (ReferenceLink)super.clone(); 162 } catch (CloneNotSupportedException e) { 163 e.printStackTrace(); 164 return null; 165 } 166 o.name = name; 167 o.target = HelperFuncs.cloneHashMap(target) ; 168 return o; 169 } 170 }