Source Code Cross Referenced for UISelectMany.java in  » J2EE » myfaces-core-1.2.0 » javax » faces » component » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » J2EE » myfaces core 1.2.0 » javax.faces.component 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        // WARNING: This file was automatically generated. Do not edit it directly,
002:        //          or you will lose your changes.
003:
004:        /*
005:         * Licensed to the Apache Software Foundation (ASF) under one
006:         * or more contributor license agreements.  See the NOTICE file
007:         * distributed with this work for additional information
008:         * regarding copyright ownership.  The ASF licenses this file
009:         * to you under the Apache License, Version 2.0 (the
010:         * "License"); you may not use this file except in compliance
011:         * with the License.  You may obtain a copy of the License at
012:         *
013:         *   http://www.apache.org/licenses/LICENSE-2.0
014:         *
015:         * Unless required by applicable law or agreed to in writing,
016:         * software distributed under the License is distributed on an
017:         * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
018:         * KIND, either express or implied.  See the License for the
019:         * specific language governing permissions and limitations
020:         * under the License.
021:         */
022:        package javax.faces.component;
023:
024:        import java.lang.reflect.Array;
025:        import java.util.ArrayList;
026:        import java.util.Arrays;
027:        import java.util.Collection;
028:        import java.util.Collections;
029:        import java.util.Iterator;
030:        import java.util.List;
031:        import javax.el.ValueExpression;
032:        import javax.faces.application.FacesMessage;
033:        import javax.faces.context.FacesContext;
034:        import javax.faces.convert.ConverterException;
035:        import javax.faces.el.ValueBinding;
036:        import javax.faces.render.Renderer;
037:
038:        /**
039:         *
040:         * <h4>Events:</h4>
041:         * <table border="1" width="100%" cellpadding="3" summary="">
042:         * <tr bgcolor="#CCCCFF" class="TableHeadingColor">
043:         * <th align="left">Type</th>
044:         * <th align="left">Phases</th>
045:         * <th align="left">Description</th>
046:         * </tr>
047:         * <tr class="TableRowColor">
048:         * <td valign="top"><code>javax.faces.event.ValueChangeEvent</code></td>
049:         * <td valign="top" nowrap></td>
050:         * <td valign="top">The valueChange event is delivered when the value
051:         attribute is changed.</td>
052:         * </tr>
053:         * </table>
054:         */
055:        public class UISelectMany extends UIInput {
056:
057:            static public final String COMPONENT_FAMILY = "javax.faces.SelectMany";
058:            static public final String COMPONENT_TYPE = "javax.faces.SelectMany";
059:
060:            /**
061:             * Construct an instance of the UISelectMany.
062:             */
063:            public UISelectMany() {
064:                setRendererType("javax.faces.Listbox");
065:            }
066:
067:            public static final String INVALID_MESSAGE_ID = "javax.faces.component.UISelectMany.INVALID";
068:
069:            public Object[] getSelectedValues() {
070:                return (Object[]) getValue();
071:            }
072:
073:            public void setSelectedValues(Object[] selectedValues) {
074:                setValue(selectedValues);
075:            }
076:
077:            /**
078:             * @deprecated Use getValueExpression instead
079:             */
080:            public ValueBinding getValueBinding(String name) {
081:                if (name == null) {
082:                    throw new NullPointerException("name");
083:                }
084:                if (name.equals("selectedValues")) {
085:                    return super .getValueBinding("value");
086:                } else {
087:                    return super .getValueBinding(name);
088:                }
089:            }
090:
091:            /**
092:             * @deprecated Use setValueExpression instead
093:             */
094:            public void setValueBinding(String name, ValueBinding binding) {
095:                if (name == null) {
096:                    throw new NullPointerException("name");
097:                }
098:                if (name.equals("selectedValues")) {
099:                    super .setValueBinding("value", binding);
100:                } else {
101:                    super .setValueBinding(name, binding);
102:                }
103:            }
104:
105:            public ValueExpression getValueExpression(String name) {
106:                if (name == null) {
107:                    throw new NullPointerException("name");
108:                }
109:                if (name.equals("selectedValues")) {
110:                    return super .getValueExpression("value");
111:                } else {
112:                    return super .getValueExpression(name);
113:                }
114:            }
115:
116:            public void setValueExpression(String name, ValueExpression binding) {
117:                if (name == null) {
118:                    throw new NullPointerException("name");
119:                }
120:                if (name.equals("selectedValues")) {
121:                    super .setValueExpression("value", binding);
122:                } else {
123:                    super .setValueExpression(name, binding);
124:                }
125:            }
126:
127:            /**
128:             * @return true if Objects are different (!)
129:             */
130:            protected boolean compareValues(Object previous, Object value) {
131:                if (previous == null) {
132:                    // one is null, the other not
133:                    return value != null;
134:                } else if (value == null) {
135:                    // one is null, the other not
136:                    return previous != null;
137:                } else {
138:                    if (previous instanceof  Object[]
139:                            && value instanceof  Object[]) {
140:                        return compareObjectArrays((Object[]) previous,
141:                                (Object[]) value);
142:                    } else if (previous instanceof  List
143:                            && value instanceof  List) {
144:                        return compareLists((List) previous, (List) value);
145:                    } else if (previous.getClass().isArray()
146:                            && value.getClass().isArray()) {
147:                        return comparePrimitiveArrays(previous, value);
148:                    } else {
149:                        //Objects have different classes
150:                        return true;
151:                    }
152:                }
153:            }
154:
155:            private boolean compareObjectArrays(Object[] previous,
156:                    Object[] value) {
157:                int length = value.length;
158:                if (previous.length != length) {
159:                    //different length
160:                    return true;
161:                }
162:
163:                boolean[] scoreBoard = new boolean[length];
164:                for (int i = 0; i < length; i++) {
165:                    Object p = previous[i];
166:                    boolean found = false;
167:                    for (int j = 0; j < length; j++) {
168:                        if (scoreBoard[j] == false) {
169:                            Object v = value[j];
170:                            if ((p == null && v == null)
171:                                    || (p != null && v != null && p.equals(v))) {
172:                                scoreBoard[j] = true;
173:                                found = true;
174:                                break;
175:                            }
176:                        }
177:                    }
178:                    if (!found) {
179:                        return true; //current element of previous array not found in new array
180:                    }
181:                }
182:
183:                return false; // arrays are identical
184:            }
185:
186:            private boolean compareLists(List previous, List value) {
187:                int length = value.size();
188:                if (previous.size() != length) {
189:                    //different length
190:                    return true;
191:                }
192:
193:                boolean[] scoreBoard = new boolean[length];
194:                for (int i = 0; i < length; i++) {
195:                    Object p = previous.get(i);
196:                    boolean found = false;
197:                    for (int j = 0; j < length; j++) {
198:                        if (scoreBoard[j] == false) {
199:                            Object v = value.get(j);
200:                            if ((p == null && v == null)
201:                                    || (p != null && v != null && p.equals(v))) {
202:                                scoreBoard[j] = true;
203:                                found = true;
204:                                break;
205:                            }
206:                        }
207:                    }
208:                    if (!found) {
209:                        return true; //current element of previous List not found in new List
210:                    }
211:                }
212:
213:                return false; // Lists are identical
214:            }
215:
216:            private boolean comparePrimitiveArrays(Object previous, Object value) {
217:                int length = Array.getLength(value);
218:                if (Array.getLength(previous) != length) {
219:                    //different length
220:                    return true;
221:                }
222:
223:                boolean[] scoreBoard = new boolean[length];
224:                for (int i = 0; i < length; i++) {
225:                    Object p = Array.get(previous, i);
226:                    boolean found = false;
227:                    for (int j = 0; j < length; j++) {
228:                        if (scoreBoard[j] == false) {
229:                            Object v = Array.get(value, j);
230:                            if ((p == null && v == null)
231:                                    || (p != null && v != null && p.equals(v))) {
232:                                scoreBoard[j] = true;
233:                                found = true;
234:                                break;
235:                            }
236:                        }
237:                    }
238:                    if (!found) {
239:                        return true; //current element of previous array not found in new array
240:                    }
241:                }
242:
243:                return false; // arrays are identical
244:            }
245:
246:            protected void validateValue(FacesContext context,
247:                    Object convertedValue) {
248:                Iterator itemValues = _createItemValuesIterator(convertedValue);
249:
250:                // verify that iterator was successfully created for convertedValue type
251:                if (itemValues == null) {
252:                    _MessageUtils.addErrorMessage(context, this ,
253:                            INVALID_MESSAGE_ID, new Object[] { _MessageUtils
254:                                    .getLabel(context, this ) });
255:                    setValid(false);
256:                    return;
257:                }
258:
259:                boolean hasValues = itemValues.hasNext();
260:
261:                // if UISelectMany is required, then there must be some selected values
262:                if (isRequired() && !hasValues) {
263:                    _MessageUtils.addErrorMessage(context, this ,
264:                            REQUIRED_MESSAGE_ID, new Object[] { _MessageUtils
265:                                    .getLabel(context, this ) });
266:                    setValid(false);
267:                    return;
268:                }
269:
270:                // run the validators only if there are item values to validate
271:                if (hasValues) {
272:                    _ComponentUtils.callValidators(context, this ,
273:                            convertedValue);
274:                }
275:
276:                if (isValid() && hasValues) {
277:                    // all selected values must match to the values of the available options
278:
279:                    _SelectItemsUtil._ValueConverter converter = new _SelectItemsUtil._ValueConverter() {
280:                        public Object getConvertedValue(FacesContext context,
281:                                String value) {
282:                            Object convertedValue = UISelectMany.this 
283:                                    .getConvertedValue(context,
284:                                            new String[] { value });
285:                            if (convertedValue instanceof  Collection) {
286:                                Iterator iter = ((Collection) convertedValue)
287:                                        .iterator();
288:                                if (iter.hasNext()) {
289:                                    return iter.next();
290:                                }
291:                                return null;
292:                            }
293:                            return ((Object[]) convertedValue)[0];
294:                        }
295:                    };
296:
297:                    Collection items = new ArrayList();
298:                    for (Iterator iter = new _SelectItemsIterator(this ); iter
299:                            .hasNext();) {
300:                        items.add(iter.next());
301:                    }
302:                    while (itemValues.hasNext()) {
303:                        Object itemValue = itemValues.next();
304:
305:                        if (!_SelectItemsUtil.matchValue(context, itemValue,
306:                                items.iterator(), converter)) {
307:                            _MessageUtils.addErrorMessage(context, this ,
308:                                    INVALID_MESSAGE_ID,
309:                                    new Object[] { _MessageUtils.getLabel(
310:                                            context, this ) });
311:                            setValid(false);
312:                            return;
313:                        }
314:                    }
315:                }
316:            }
317:
318:            /**
319:             * First part is identical to super.validate except the empty condition.
320:             * Second part: iterate through UISelectItem and UISelectItems and check
321:             * current values against these items
322:             */
323:            public void validate(FacesContext context) {
324:                // TODO : Setting the submitted value to null in the super class causes a bug, if set to null, you'll get the following error :
325:                // java.lang.NullPointerException at org.apache.myfaces.renderkit._SharedRendererUtils.getConvertedUISelectManyValue(_SharedRendererUtils.java:118)
326:                super .validate(context);
327:            }
328:
329:            protected Object getConvertedValue(FacesContext context,
330:                    Object submittedValue) {
331:                try {
332:                    Renderer renderer = getRenderer(context);
333:                    if (renderer != null) {
334:                        return renderer.getConvertedValue(context, this ,
335:                                submittedValue);
336:                    } else if (submittedValue == null) {
337:                        return null;
338:                    } else if (submittedValue instanceof  String[]) {
339:                        return _SharedRendererUtils
340:                                .getConvertedUISelectManyValue(context, this ,
341:                                        (String[]) submittedValue);
342:                    }
343:                } catch (ConverterException e) {
344:                    FacesMessage facesMessage = e.getFacesMessage();
345:                    if (facesMessage != null) {
346:                        context.addMessage(getClientId(context), facesMessage);
347:                    } else {
348:                        _MessageUtils.addErrorMessage(context, this ,
349:                                CONVERSION_MESSAGE_ID,
350:                                new Object[] { _MessageUtils.getLabel(context,
351:                                        this ) });
352:                    }
353:                    setValid(false);
354:                }
355:                return submittedValue;
356:            }
357:
358:            private Iterator _createItemValuesIterator(Object convertedValue) {
359:                if (convertedValue == null) {
360:                    return Collections.EMPTY_LIST.iterator();
361:                } else {
362:                    Class valueClass = convertedValue.getClass();
363:                    if (valueClass.isArray()) {
364:                        return new _PrimitiveArrayIterator(convertedValue);
365:                    } else if (convertedValue instanceof  Object[]) {
366:                        Object[] values = (Object[]) convertedValue;
367:                        return Arrays.asList(values).iterator();
368:                    } else if (convertedValue instanceof  List) {
369:                        List values = (List) convertedValue;
370:                        return values.iterator();
371:                    } else {
372:                        // unsupported type for iteration
373:                        return null;
374:                    }
375:                }
376:            }
377:
378:            @Override
379:            public String getFamily() {
380:                return COMPONENT_FAMILY;
381:            }
382:        }
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