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1
30 package com.genimen.djeneric.tools.specifier.editor;
31
32 import java.text.SimpleDateFormat  ;
33 import java.util.Date ;
34 import java.util.HashMap ;
35 import java.util.Iterator ;
36
37 import com.genimen.djeneric.language.Messages;
38 import com.genimen.djeneric.repository.DjDomain;
39 import com.genimen.djeneric.repository.DjList;
40 import com.genimen.djeneric.repository.DjObject;
41 import com.genimen.djeneric.repository.exceptions.DjenericException;
42 import com.genimen.djeneric.structure.PropertyUsage;
43 import com.genimen.djeneric.tools.specifier.interfaces.DjenericResourceManager;
44 import com.genimen.djeneric.tools.specifier.interfaces.ObjectViewer;
45
46
54 public class DjenericContextManager
55 {
56 private HashMap _context = new HashMap (10);
57 DjenericResourceManager _resourceManager;
58 HashMap _parameters = new HashMap ();
59
60
63 public DjenericContextManager(DjenericResourceManager resourceManager)
64 {
65 _resourceManager = resourceManager;
66 }
67
68 public void addParameter(String id, DjObject obj)
69 {
70 _parameters.put(id, obj);
71 }
72
73 public DjObject getParameter(String id)
74 {
75 return (DjObject) _parameters.get(id);
76 }
77
78 public void registerViewer(String id, ObjectViewer viewer)
79 {
80 _context.put(id.toLowerCase(), viewer);
81 }
82
83 public ObjectViewer getViewer(String id)
84 {
85 return (ObjectViewer) _context.get(id.toLowerCase());
86 }
87
88 public Object evaluatePath(String path, DjList objects, DjObject object, PropertyUsage pu) throws DjenericException
89 {
90 if (path == null || path.trim().length() == 0) return null;
91
92 if (path.startsWith(":"))
93 {
94 return evaluateParameter(path, objects, object, pu);
95 }
96
97 if (path.startsWith("$"))
98 {
99 return evaluateFunction(path, objects, object, pu);
100 }
101
102 int idx = path.indexOf(".");
103
104 String rootName = path;
105 if (idx != -1)
106 {
107 rootName = path.substring(0, idx);
108 path = path.substring(idx + 1);
109 }
110
111 ObjectViewer rootView = getViewer(rootName);
112 if (rootView == null)
113 {
114 String descr = "";
115 if (pu != null) descr += pu.getPropertyName() + "; expr=";
116 descr += path;
117
118 throw new DjenericException(Messages.getString("DjenericObjectModel.UnknownIdentifier", rootName, descr));
119 }
120 DjObject obj = rootView.getSelectedValue();
121
122 Object result = obj;
123 if (path.trim().length() > 0)
124 {
125 if (path.indexOf("+") != -1 || path.indexOf("\"") != -1) result = obj.evaluateStringExpression(path);
126 else result = obj.evaluateObjectExpression(path);
127 }
128 return result;
129 }
130
131 private Object evaluateParameter(String path, DjList objects, DjObject object, PropertyUsage pu)
132 throws DjenericException
133 {
134 String paramName;
135 int dotIdx = Math.min(path.indexOf('.'), path.indexOf('+'));
136 if (dotIdx != -1)
137 {
138 paramName = path.substring(1, dotIdx).trim();
139 path = path.substring(dotIdx + 1).trim();
140 }
141 else
142 {
143 paramName = path.substring(1).trim();
144 path = "";
145 }
146
147 DjObject contextObject = getParameter(paramName);
148 if (contextObject == null) return null;
149 if (path.length() == 0) return contextObject;
150
151 if (path.indexOf("+") != -1 || path.indexOf("\"") != -1) return contextObject.evaluateStringExpression(path);
152 else return contextObject.evaluateObjectExpression(path);
153
154 }
155
156 public Object evaluateFunction(String path, DjList objects, DjObject object, PropertyUsage pu)
157 throws DjenericException
158 {
159 DjDomain domain = null;
160 String fmt = null;
161
162 if (pu != null && pu.getProperty().getType() instanceof DjDomain)
163 {
164 domain = (DjDomain) pu.getProperty().getType();
165 fmt = domain.getFormatMask();
166 }
167
168 if (path.equalsIgnoreCase("$timestamp"))
169 {
170 if (fmt != null)
171 {
172 SimpleDateFormat sdf = new SimpleDateFormat (fmt);
173 return sdf.format(new Date ());
174 }
175 return new Date ().toString();
176 }
177
178 if (path.equalsIgnoreCase("$user"))
179 {
180 return object.getSession().getPersistenceManager().getCurrentUser().getCode();
181 }
182
183 if (path.equalsIgnoreCase("$username"))
184 {
185 return object.getSession().getPersistenceManager().getCurrentUser().getName();
186 }
187
188 if (path.equalsIgnoreCase("$count"))
189 {
190 return String.valueOf(objects.size() + 1);
191 }
192
193 if (path.equalsIgnoreCase("$seq"))
194 {
195 String propName = pu.getPropertyName();
196 int seq = 0;
197 Iterator it = objects.iterator();
198 while (it.hasNext())
199 {
200 DjObject o = (DjObject) it.next();
201 int i = o.getInt(propName);
202 if (i > seq) seq = i;
203 }
204 seq += 10;
205 return String.valueOf(seq);
206 }
207
208 if (path.equalsIgnoreCase("$unique"))
209 {
210 String propName = pu.getPropertyName();
211 int seq = 0;
212 Iterator it = objects.iterator();
213 while (it.hasNext())
214 {
215 DjObject o = (DjObject) it.next();
216 int i = o.getInt(propName);
217 if (i > seq) seq = i;
218 }
219 seq += 1;
220 return String.valueOf(seq);
221 }
222
223 throw new DjenericException(Messages.getString("DjenericContextManager.UndefinedFunction", path));
224 }
225
226 public DjenericResourceManager getResourceManager()
227 {
228 return _resourceManager;
229 }
230
231 } |
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