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 EVolve.*;
027 import EVolve.util.HelperFuncs;
028
029 import java.util.*;
030
031 public class ReferenceLink implements Cloneable{
032 private String name; // name of the link
033 private int sourceType; // type of the source element
034 private int sourceIndex; // field index of the source element
035 private int targetType; // type of the target entity
036 private HashMap target; // id of the targets
037 private String description; // description of the link
038 private HashSet properties;
039
040 /**
041 * Creates a reference link.
042 *
043 * @param name name of the link
044 * @param sourceType type of the source element
045 * @param sourceIndex field index of the source element
046 * @param targetType type of the target entity
047 * @param description description of the link
048 * @param properties properties of the link
049 */
050 public ReferenceLink(String name, int sourceType, int sourceIndex, int targetType, String description, String[] properties) {
051 this.name = name;
052 this.sourceType = sourceType;
053 this.sourceIndex = sourceIndex;
054 this.targetType = targetType;
055 this.description = description;
056 this.properties = new HashSet();
057 for (int i=0; i<properties.length; i++)
058 this.properties.add(properties[i]);
059 if (properties.length == 0)
060 this.properties.add("reference");
061
062 target = Scene.getDataManager().getEntity()[targetType];
063 /*target = new int[Scene.getDataManager().getEntity()[targetType].length];
064 for (int i = 0; i < target.length; i++) {
065 target[i] = i;
066 }*/
067 }
068
069 /**
070 * Creates a reference link by combining two reference links.
071 *
072 * @param from where the link starts
073 * @param to where the link ends
074 */
075 public ReferenceLink(ReferenceLink from, ReferenceLink to) {
076 this.name = to.name;
077 this.sourceType = from.sourceType;
078 this.sourceIndex = from.sourceIndex;
079 this.targetType = to.targetType;
080 this.description = from.description + " >>> " + to.description;
081
082 /*target = new int[from.target.length];
083 for (int i = 0; i < target.length; i++) {
084 target[i] = to.target[Scene.getDataManager().getEntity()[from.targetType][from.target[i]].getField()[to.sourceIndex]];
085 }*/
086 target = new HashMap();
087 Iterator it = from.target.keySet().iterator();
088 while (it.hasNext()) {
089 Object key = it.next();
090 Object fromKey = new Long(((Entity)from.target.get(key)).getField()[to.sourceIndex]);
091 Entity entity = (Entity)Scene.getDataManager().getEntity()[from.targetType].get(fromKey);
092 target.put(key,entity);
093 }
094 this.properties = HelperFuncs.cloneHashSet(from.properties);
095 }
096
097 /**
098 * Gets the name of the link.
099 *
100 * @return name of the link
101 */
102 public String getName() {
103 return name;
104 }
105
106 /**
107 * Gets the type of the source element.
108 *
109 * @return type of the source element
110 */
111 public int getSourceType() {
112 return sourceType;
113 }
114
115 /**
116 * Gets the field index of the source element.
117 *
118 * @return field index of the source element
119 */
120 public int getSourceIndex() {
121 return sourceIndex;
122 }
123
124 /**
125 * Gets the type of the target entity.
126 *
127 * @return type of the target entity
128 */
129 public int getTargetType() {
130 return targetType;
131 }
132
133 /**
134 * Gets the target.
135 *
136 * @param source reference
137 * @return target
138 */
139 public long getTarget(long source) {
140 return ((Entity)target.get(new Long(source))).getId();
141 }
142
143 /**
144 * Gets the description of the link.
145 *
146 * @return description of the link
147 */
148 public String getDescription() {
149 return description;
150 }
151
152 public boolean hasProperty(String property) {
153 return properties.contains(property);
154 }
155
156 public Object clone() {
157 ReferenceLink o = null;
158 try {
159 o = (ReferenceLink)super.clone();
160 } catch (CloneNotSupportedException e) {
161 e.printStackTrace();
162 return null;
163 }
164 o.name = name;
165 o.target = HelperFuncs.cloneHashMap(target) ;
166 return o;
167 }
168 }