Source Code Cross Referenced for TableDataModel.java in  » XML-UI » xmlgui » org » beryl » gui » model » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » XML UI » xmlgui » org.beryl.gui.model 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Beryl - A web platform based on XML, XSLT and Java
003:         * This file is part of the Beryl XML GUI
004:         *
005:         * Copyright (C) 2004 Wenzel Jakob <wazlaf@tigris.org>
006:         *
007:         * This program is free software; you can redistribute it and/or
008:         * modify it under the terms of the GNU Lesser General Public
009:         * License as published by the Free Software Foundation; either
010:         * version 2.1 of the License, or (at your option) any later version.
011:
012:         * This program is distributed in the hope that it will be useful,
013:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
014:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
015:         * Lesser General Public License for more details.
016:         *
017:         * You should have received a copy of the GNU Lesser General Public
018:         * License along with this program; if not, write to the Free Software
019:         * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-3107  USA
020:         */
021:
022:        package org.beryl.gui.model;
023:
024:        import java.io.Serializable;
025:        import java.lang.reflect.Method;
026:        import java.util.ArrayList;
027:        import java.util.HashMap;
028:        import java.util.Iterator;
029:        import java.util.LinkedHashSet;
030:        import java.util.List;
031:        import java.util.Set;
032:
033:        import org.beryl.gui.GUIException;
034:        import org.beryl.gui.View;
035:
036:        /**
037:         * Special type of data model which refers to columns using keys instead of indices
038:         */
039:
040:        public class TableDataModel extends AbstractDataModel implements 
041:                Serializable {
042:            private ArrayList rows = null;
043:            private RowChangeNotifier notifier = null;
044:
045:            /**
046:             * Since examining a value object using reflection is
047:             * a relatively expensive task, we have a static cache here
048:             * which will store references to the field names and their getters
049:             */
050:            private static HashMap reflectionInfo = new HashMap();
051:
052:            public static class ReflectionInfo {
053:                public List fieldNames = new ArrayList();
054:                public List fieldMethods = new ArrayList();
055:            };
056:
057:            private class RowChangeNotifier implements  ModelChangeListener {
058:                public void modelChanged(ModelChangeEvent e)
059:                        throws GUIException {
060:                    MapChangeEvent event = (MapChangeEvent) e;
061:
062:                    int row = rows.indexOf(event.getModel());
063:                    if (row != -1) {
064:                        TableChangeEvent tce = new TableChangeEvent(e
065:                                .getSource(), TableDataModel.this ,
066:                                TableChangeEvent.INTERVAL_CHANGED, row, row,
067:                                event.getKey());
068:                        fireModelEvent(tce);
069:                    }
070:                }
071:            };
072:
073:            public TableDataModel() {
074:                rows = new ArrayList();
075:                notifier = new RowChangeNotifier();
076:            }
077:
078:            public ReflectionInfo getReflectionInfo(Object object) {
079:                Class objectClass = object.getClass();
080:                ReflectionInfo result = (ReflectionInfo) reflectionInfo
081:                        .get(objectClass);
082:
083:                if (result == null) {
084:                    result = new ReflectionInfo();
085:
086:                    Method methods[] = objectClass.getDeclaredMethods();
087:                    for (int i = 0; i < methods.length; i++) {
088:                        String name = methods[i].getName();
089:                        if (name.startsWith("get")) {
090:                            name = name.substring(3, 4).toLowerCase()
091:                                    + name.substring(4);
092:                            result.fieldNames.add(name);
093:                            result.fieldMethods.add(methods[i]);
094:                        }
095:                    }
096:
097:                    reflectionInfo.put(objectClass, result);
098:                }
099:
100:                return result;
101:            }
102:
103:            public TableDataModel(Set valueObjects) throws GUIException {
104:                this ();
105:                addValueObjects(valueObjects);
106:            }
107:
108:            /**
109:             * Clears the data model
110:             */
111:            public void clear() throws GUIException {
112:                TableChangeEvent event = new TableChangeEvent(null, this ,
113:                        TableChangeEvent.INTERVAL_INSERTED, 0, rows.size(),
114:                        null);
115:                rows.clear();
116:                fireModelEvent(event);
117:            }
118:
119:            /**
120:             * Add a set of value objects to the table data model
121:             */
122:            public void addValueObjects(Set valueObjects) throws GUIException {
123:                insertValueObjects(rows.size(), valueObjects);
124:            }
125:
126:            /**
127:             * Insert a set of value objects into the table data model
128:             */
129:            public void insertValueObjects(int index, Set valueObjects)
130:                    throws GUIException {
131:                Iterator iterator = valueObjects.iterator();
132:                if (iterator.hasNext()) {
133:                    Object valueObject = iterator.next();
134:                    ReflectionInfo info = getReflectionInfo(valueObject);
135:
136:                    Set valueRows = new LinkedHashSet();
137:                    valueRows.add(new ValueObjectTableRow(info, valueObject));
138:
139:                    while (iterator.hasNext()) {
140:                        valueRows.add(new ValueObjectTableRow(info, iterator
141:                                .next()));
142:                    }
143:
144:                    insertRows(null, index, valueRows);
145:                }
146:            }
147:
148:            /**
149:             * Remove a single value object from the table data model
150:             */
151:            public void removeValueObject(Object valueObject)
152:                    throws GUIException {
153:                for (int i = 0; i < rows.size(); i++) {
154:                    Object row = rows.get(i);
155:                    if (row instanceof  ValueObjectTableRow) {
156:                        Object value = ((ValueObjectTableRow) row)
157:                                .getValueObject();
158:
159:                        if (valueObject.equals(value)) {
160:                            removeRow((TableRow) row);
161:                            break;
162:                        }
163:                    }
164:                }
165:            }
166:
167:            /**
168:             * Remove multiple value objects from the table data model
169:             */
170:            public void removeValueObjects(Set valueObjects)
171:                    throws GUIException {
172:                Object objects[] = valueObjects.toArray();
173:
174:                for (int i = 0; i < rows.size(); i++) {
175:                    Object row = rows.get(i);
176:                    if (row instanceof  ValueObjectTableRow) {
177:                        Object value = ((ValueObjectTableRow) row)
178:                                .getValueObject();
179:                        for (int o = 0; o < objects.length; o++) {
180:                            if (objects[o].equals(value)) {
181:                                removeRow((TableRow) row);
182:                                break;
183:                            }
184:                        }
185:                    }
186:                }
187:            }
188:
189:            /**
190:             * Add a single value object to the table data model
191:             */
192:            public void addValueObject(Object valueObject) throws GUIException {
193:                insertValueObject(rows.size(), valueObject);
194:            }
195:
196:            /**
197:             * Create a value object table row
198:             */
199:            public ValueObjectTableRow createValueObjectTableRow(
200:                    Object valueObject) throws GUIException {
201:                return new ValueObjectTableRow(getReflectionInfo(valueObject),
202:                        valueObject);
203:            }
204:
205:            /**
206:             * Insert a single value object into the table data model
207:             */
208:            public void insertValueObject(int index, Object valueObject)
209:                    throws GUIException {
210:                insertRow(index, createValueObjectTableRow(valueObject));
211:            }
212:
213:            public Object getValue(int row, String key) {
214:                return ((TableRow) rows.get(row)).getValue(key);
215:            }
216:
217:            public void setValue(int row, String key, Object value)
218:                    throws GUIException {
219:                ((TableRow) rows.get(row)).setValue(key, value);
220:            }
221:
222:            public boolean isEditable(int row, String key) {
223:                return ((TableRow) rows.get(row)).isEditable(key);
224:            }
225:
226:            public void addRow(TableRow tableRow) throws GUIException {
227:                insertRow(null, rows.size(), tableRow);
228:            }
229:
230:            public void addRow(View view, TableRow tableRow)
231:                    throws GUIException {
232:                insertRow(view, rows.size(), tableRow);
233:            }
234:
235:            public void addRows(View view, Set tableRows) throws GUIException {
236:                insertRows(view, rows.size(), tableRows);
237:            }
238:
239:            public void insertRow(int index, TableRow tableRow)
240:                    throws GUIException {
241:                insertRow(null, index, tableRow);
242:            }
243:
244:            public void insertRow(View view, int index, TableRow tableRow)
245:                    throws GUIException {
246:                TableChangeEvent event = new TableChangeEvent(view, this ,
247:                        TableChangeEvent.INTERVAL_INSERTED, index, index, null);
248:                tableRow.addModelChangeListener(notifier);
249:                rows.add(index, tableRow);
250:                fireModelEvent(event);
251:            }
252:
253:            public void insertRows(View view, int index, Set tableRows)
254:                    throws GUIException {
255:                TableChangeEvent event = new TableChangeEvent(view, this ,
256:                        TableChangeEvent.INTERVAL_INSERTED, index, index
257:                                + tableRows.size(), null);
258:                for (Iterator i = tableRows.iterator(); i.hasNext();)
259:                    ((TableRow) i.next()).addModelChangeListener(notifier);
260:                rows.addAll(index, tableRows);
261:                fireModelEvent(event);
262:            }
263:
264:            public void removeRow(int index) throws GUIException {
265:                removeRow(null, index);
266:            }
267:
268:            public void removeRow(View view, int index) throws GUIException {
269:                TableRow tableRow = (TableRow) rows.get(index);
270:                TableChangeEvent event = new TableChangeEvent(view, this ,
271:                        TableChangeEvent.INTERVAL_REMOVED, index, index, null);
272:                tableRow.removeModelChangeListener(notifier);
273:                rows.remove(index);
274:                fireModelEvent(event);
275:            }
276:
277:            public void removeRow(TableRow tableRow) throws GUIException {
278:                removeRow(null, tableRow);
279:            }
280:
281:            public void removeRow(View view, TableRow tableRow)
282:                    throws GUIException {
283:                int index = rows.indexOf(tableRow);
284:
285:                if (index != -1) {
286:                    TableChangeEvent event = new TableChangeEvent(view, this ,
287:                            TableChangeEvent.INTERVAL_REMOVED, index, index,
288:                            null);
289:                    tableRow.removeModelChangeListener(notifier);
290:                    rows.remove(index);
291:                    fireModelEvent(event);
292:                } else {
293:                    throw new GUIException("Row could not be found");
294:                }
295:            }
296:
297:            public ArrayList getRows() {
298:                return rows;
299:            }
300:
301:            public int getRowCount() {
302:                return rows.size();
303:            }
304:
305:            public int getRowIndex(TableRow row) {
306:                return rows.indexOf(row);
307:            }
308:
309:            public TableRow getTableRow(int row) {
310:                return (TableRow) rows.get(row);
311:            }
312:
313:            public int indexOf(TableRow tableRow) {
314:                return rows.indexOf(tableRow);
315:            }
316:
317:            public String toString() {
318:                StringBuffer buf = new StringBuffer();
319:                buf.append("org.beryl.gui.TableDataModel [\n");
320:                for (int i = 0; i < rows.size(); i++) {
321:                    TableRow row = (TableRow) rows.get(i);
322:                    buf.append("    ").append(i).append(" : ");
323:                    buf.append(row.toString()).append("\n");
324:                }
325:                buf.append("]");
326:                return buf.toString();
327:            }
328:        }
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