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1
23
24 package org.dbforms.event;
25
26 import org.dbforms.config.DbFormsConfig;
27 import org.dbforms.config.FieldValue;
28 import org.dbforms.config.FieldValues;
29 import org.dbforms.config.Table;
30 import org.dbforms.config.ValidationException;
31
32 import org.dbforms.util.FileHolder;
33 import java.sql.Connection  ;
34
35 import java.util.HashMap ;
36 import java.util.Iterator ;
37 import java.util.Map ;
38
39 import javax.servlet.http.HttpServletRequest ;
40
41
42
43
113 public class BlobInterceptor extends DbEventInterceptorSupport {
114 private static final int BLOB_COL = 0;
115 private static final int NAME_COL = 1;
116 private static final int MIME_COL = 2;
117 private static final int SIZE_COL = 3;
118 private HashMap blobFieldData;
119
120
125 public void setParameterMap(Map params) {
126 super.setParameterMap(params);
127 blobFieldData = new HashMap ();
128
129 for (Iterator iter = params.entrySet()
130 .iterator(); iter.hasNext();) {
131 Map.Entry me = (Map.Entry ) iter.next();
132 String key = (String ) me.getKey();
133 String value = (String ) me.getValue();
134
135 if (key.startsWith("blob-column")) {
136 Integer ii = getSuffixAsInteger(key, "blob-column");
137 String [] s = (String []) blobFieldData.get(ii);
138
139 if (s == null) {
140 s = new String [4];
141 blobFieldData.put(ii, s);
142 }
143
144 s[BLOB_COL] = value;
145 } else if (key.startsWith("name-column")) {
146 Integer ii = getSuffixAsInteger(key, "name-column");
147 String [] s = (String []) blobFieldData.get(ii);
148
149 if (s == null) {
150 s = new String [4];
151 blobFieldData.put(ii, s);
152 }
153
154 s[NAME_COL] = value;
155 } else if (key.startsWith("mime-column")) {
156 Integer ii = getSuffixAsInteger(key, "mime-column");
157 String [] s = (String []) blobFieldData.get(ii);
158
159 if (s == null) {
160 s = new String [4];
161 blobFieldData.put(ii, s);
162 }
163
164 s[MIME_COL] = value;
165 } else if (key.startsWith("size-column")) {
166 Integer ii = getSuffixAsInteger(key, "size-column");
167 String [] s = (String []) blobFieldData.get(ii);
168
169 if (s == null) {
170 s = new String [4];
171 blobFieldData.put(ii, s);
172 }
173
174 s[SIZE_COL] = value;
175 }
176 }
177 }
178
179
180
192 public int preInsert(HttpServletRequest request,
193 Table table,
194 FieldValues fieldValues,
195 DbFormsConfig config,
196 Connection con) throws ValidationException {
197 assignBlobData(table, fieldValues);
198
199 return GRANT_OPERATION;
200 }
201
202
203
215 public int preUpdate(HttpServletRequest request,
216 Table table,
217 FieldValues fieldValues,
218 DbFormsConfig config,
219 Connection con) throws ValidationException {
220 assignBlobData(table, fieldValues);
221
222 return GRANT_OPERATION;
223 }
224
225
226
234 private Integer getSuffixAsInteger(String value,
235 String stub) {
236 String suffix = value.substring(stub.length());
237
238 if (suffix.length() == 0) {
239 return new Integer (Integer.MIN_VALUE);
240 } else {
241 return new Integer (suffix);
242 }
243 }
244
245
246
254 private void assignBlobData(Table table,
255 FieldValues fieldValues) {
256 for (Iterator iter = blobFieldData.values()
257 .iterator(); iter.hasNext();) {
258 String [] s = (String []) iter.next();
259 FieldValue fv = fieldValues.get(s[BLOB_COL]);
260
261 if (fv != null) {
262 Object o = fv.getFieldValueAsObject();
263
264 if ((o != null) && o instanceof FileHolder) {
265 String fileName = ((FileHolder) o).getFileName();
266 String contentType = ((FileHolder) o).getContentType();
267 int fileLength = ((FileHolder) o).getFileLength();
268 setValue(table, fieldValues, s[NAME_COL], fileName);
269
270 if (s[MIME_COL] != null) {
271 setValue(table, fieldValues, s[MIME_COL], contentType);
272 }
273
274 if (s[SIZE_COL] != null) {
275 setValue(table, fieldValues, s[SIZE_COL],
276 String.valueOf(fileLength));
277 }
278 }
279 }
280 }
281 }
282 }
283 |
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