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1
10
11 package com.triactive.jdo.sco;
12
13 import com.triactive.jdo.SCO;
14 import java.util.ArrayList  ;
15 import java.util.Collection ;
16 import java.util.Iterator ;
17 import java.util.Map ;
18 import java.util.Map.Entry;
19
20
21
29
30 class SCOHelper
31 {
32 private SCOHelper() {}
33
34
35 private static void assertIsValidElement(SCO o, boolean allowNulls, Class expectedType, Object element)
36 {
37 if (element == null && !allowNulls)
38 throw new NullsNotAllowedException(o);
39
40 Class actualType = element.getClass();
41
42 if (!expectedType.isAssignableFrom(actualType))
43 throw new IncompatibleElementTypeException(o, expectedType, actualType);
44 }
45
46
47 private static void assertIsValidKey(SCO o, Class expectedType, Object key)
48 {
49 if (key == null)
50 throw new NullsNotAllowedException(o);
51
52 Class actualType = key.getClass();
53
54 if (!expectedType.isAssignableFrom(actualType))
55 throw new IncompatibleKeyTypeException(o, expectedType, actualType);
56 }
57
58
59 private static void assertIsValidValue(SCO o, boolean allowNulls, Class expectedType, Object value)
60 {
61 if (value == null && !allowNulls)
62 throw new NullsNotAllowedException(o);
63
64 Class actualType = value.getClass();
65
66 if (!expectedType.isAssignableFrom(actualType))
67 throw new IncompatibleValueTypeException(o, expectedType, actualType);
68 }
69
70
71
78
79 public static void assertIsValidElement(SCOCollection c, Object element)
80 {
81 if (c.getOwner() != null)
82 assertIsValidElement(c, c.allowsNulls(), c.getElementType(), element);
83 }
84
85
86
92
93 public static void assertIsValidKey(SCOMap m, Object key)
94 {
95 if (m.getOwner() != null)
96 assertIsValidKey(m, m.getKeyType(), key);
97 }
98
99
100
106
107 public static void assertIsValidValue(SCOMap m, Object value)
108 {
109 if (m.getOwner() != null)
110 assertIsValidValue(m, m.allowsNullValues(), m.getValueType(), value);
111 }
112
113
114
120
121 public static boolean isValidElement(SCOCollection c, Object element)
122 {
123 if (c.getOwner() != null)
124 {
125 try { assertIsValidElement(c, c.allowsNulls(), c.getElementType(), element); }
126 catch (Exception e) { return false; }
127 }
128
129 return true;
130 }
131
132
133
139
140 public static boolean isValidKey(SCOMap m, Object key)
141 {
142 if (m.getOwner() != null)
143 {
144 try { assertIsValidKey(m, m.getKeyType(), key); }
145 catch (Exception e) { return false; }
146 }
147
148 return true;
149 }
150
151
152
158
159 public static boolean isValidValue(SCOMap m, Object value)
160 {
161 if (m.getOwner() != null)
162 {
163 try { assertIsValidValue(m, m.allowsNullValues(), m.getValueType(), value); }
164 catch (Exception e) { return false; }
165 }
166
167 return true;
168 }
169
170
171
178
179 public static void assertAllValidElements(SCOCollection c, Collection elements)
180 {
181 if (c.getOwner() != null)
182 {
183 boolean allowNulls = c.allowsNulls();
184 Class expectedType = c.getElementType();
185
186 ArrayList failures = new ArrayList ();
187 Iterator i = elements.iterator();
188
189 while (i.hasNext())
190 {
191 try
192 {
193 assertIsValidElement(c, allowNulls, expectedType, i.next());
194 }
195 catch (Throwable t)
196 {
197 failures.add(t);
198 }
199 }
200
201 if (!failures.isEmpty())
202 throw new IllegalArgumentsException(c, (Throwable [])failures.toArray(new Throwable [failures.size()]));
203 }
204 }
205
206
207
214
215 public static void assertAllValidEntries(SCOMap m, Map entries)
216 {
217 if (m.getOwner() != null)
218 {
219 boolean allowNullValues = m.allowsNullValues();
220 Class keyType = m.getKeyType();
221 Class valueType = m.getValueType();
222
223 ArrayList failures = new ArrayList ();
224 Iterator i = entries.entrySet().iterator();
225
226 while (i.hasNext())
227 {
228 try
229 {
230 Entry e = (Entry)i.next();
231 assertIsValidKey(m, keyType, e.getKey());
232 assertIsValidValue(m, allowNullValues, valueType, e.getValue());
233 }
234 catch (Throwable t)
235 {
236 failures.add(t);
237 }
238 }
239
240 if (!failures.isEmpty())
241 throw new IllegalArgumentsException(m, (Throwable [])failures.toArray(new Throwable [failures.size()]));
242 }
243 }
244
245
246
252
253 public static String toLogString(SCO sco)
254 {
255 StringBuffer sb = new StringBuffer ("SCO ");
256
257 String scoClassName = sco.getClass().getName();
258 sb.append(scoClassName.substring(scoClassName.lastIndexOf('.') + 1))
259 .append('@').append(System.identityHashCode(sco));
260
261 Object owner = sco.getOwner();
262
263 if (owner != null)
264 {
265 String ownerClassName = owner.getClass().getName();
266
267 sb.append(" for ")
268 .append(ownerClassName.substring(ownerClassName.lastIndexOf('.') + 1))
269 .append('@').append(System.identityHashCode(owner))
270 .append('.').append(sco.getFieldName());
271 }
272
273 return sb.toString();
274 }
275 }
276 |
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