Source Code Cross Referenced for DelegatingValidatorContext.java in  » J2EE » webwork-2.2.6 » com » opensymphony » xwork » validator » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » J2EE » webwork 2.2.6 » com.opensymphony.xwork.validator 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright (c) 2002-2006 by OpenSymphony
003:         * All rights reserved.
004:         */
005:        package com.opensymphony.xwork.validator;
006:
007:        import com.opensymphony.xwork.*;
008:        import com.opensymphony.xwork.util.OgnlValueStack;
009:
010:        import org.apache.commons.logging.Log;
011:        import org.apache.commons.logging.LogFactory;
012:
013:        import java.util.Collection;
014:        import java.util.Iterator;
015:        import java.util.List;
016:        import java.util.Locale;
017:        import java.util.Map;
018:        import java.util.ResourceBundle;
019:
020:        /**
021:         * A default implementation of the {@link ValidatorContext} interface.
022:         *
023:         * @author Jason Carreira
024:         * @author Rainer Hermanns
025:         */
026:        public class DelegatingValidatorContext implements  ValidatorContext {
027:
028:            private LocaleProvider localeProvider;
029:            private TextProvider textProvider;
030:            private ValidationAware validationAware;
031:
032:            /**
033:             * Creates a new validation context given a ValidationAware object, and a text and locale provider. These objects
034:             * are used internally to set errors and get and set error text.
035:             */
036:            public DelegatingValidatorContext(ValidationAware validationAware,
037:                    TextProvider textProvider, LocaleProvider localeProvider) {
038:                this .textProvider = textProvider;
039:                this .validationAware = validationAware;
040:                this .localeProvider = localeProvider;
041:            }
042:
043:            /**
044:             * Creates a new validation context given an object - usually an Action. The internal objects
045:             * (validation aware instance and a locale and text provider) are created based on the given action.
046:             *
047:             * @param object the object to use for validation (usually an Action).
048:             */
049:            public DelegatingValidatorContext(Object object) {
050:                this .localeProvider = makeLocaleProvider(object);
051:                this .validationAware = makeValidationAware(object);
052:                this .textProvider = makeTextProvider(object, localeProvider);
053:            }
054:
055:            /**
056:             * Create a new validation context given a Class definition. The locale provider, text provider and
057:             * the validation context are created based on the class.
058:             *
059:             * @param clazz the class to initialize the context with.
060:             */
061:            public DelegatingValidatorContext(Class clazz) {
062:                localeProvider = new ActionContextLocaleProvider();
063:                textProvider = new TextProviderSupport(clazz, localeProvider);
064:                validationAware = new LoggingValidationAware(clazz);
065:            }
066:
067:            public void setActionErrors(Collection errorMessages) {
068:                validationAware.setActionErrors(errorMessages);
069:            }
070:
071:            public Collection getActionErrors() {
072:                return validationAware.getActionErrors();
073:            }
074:
075:            public void setActionMessages(Collection messages) {
076:                validationAware.setActionMessages(messages);
077:            }
078:
079:            public Collection getActionMessages() {
080:                return validationAware.getActionMessages();
081:            }
082:
083:            public void setFieldErrors(Map errorMap) {
084:                validationAware.setFieldErrors(errorMap);
085:            }
086:
087:            public Map getFieldErrors() {
088:                return validationAware.getFieldErrors();
089:            }
090:
091:            public String getFullFieldName(String fieldName) {
092:                return fieldName;
093:            }
094:
095:            public Locale getLocale() {
096:                return localeProvider.getLocale();
097:            }
098:
099:            public boolean hasKey(String key) {
100:                return textProvider.hasKey(key);
101:            }
102:
103:            public String getText(String aTextName) {
104:                return textProvider.getText(aTextName);
105:            }
106:
107:            public String getText(String aTextName, String defaultValue) {
108:                return textProvider.getText(aTextName, defaultValue);
109:            }
110:
111:            public String getText(String aTextName, String defaultValue,
112:                    String obj) {
113:                return textProvider.getText(aTextName, defaultValue, obj);
114:            }
115:
116:            public String getText(String aTextName, List args) {
117:                return textProvider.getText(aTextName, args);
118:            }
119:
120:            public String getText(String key, String[] args) {
121:                return textProvider.getText(key, args);
122:            }
123:
124:            public String getText(String aTextName, String defaultValue,
125:                    List args) {
126:                return textProvider.getText(aTextName, defaultValue, args);
127:            }
128:
129:            public String getText(String key, String defaultValue, String[] args) {
130:                return textProvider.getText(key, defaultValue, args);
131:            }
132:
133:            public ResourceBundle getTexts(String aBundleName) {
134:                return textProvider.getTexts(aBundleName);
135:            }
136:
137:            public String getText(String key, String defaultValue, List args,
138:                    OgnlValueStack stack) {
139:                return textProvider.getText(key, defaultValue, args, stack);
140:            }
141:
142:            public String getText(String key, String defaultValue,
143:                    String[] args, OgnlValueStack stack) {
144:                return textProvider.getText(key, defaultValue, args, stack);
145:            }
146:
147:            public ResourceBundle getTexts() {
148:                return textProvider.getTexts();
149:            }
150:
151:            public void addActionError(String anErrorMessage) {
152:                validationAware.addActionError(anErrorMessage);
153:            }
154:
155:            public void addActionMessage(String aMessage) {
156:                validationAware.addActionMessage(aMessage);
157:            }
158:
159:            public void addFieldError(String fieldName, String errorMessage) {
160:                validationAware.addFieldError(fieldName, errorMessage);
161:            }
162:
163:            public boolean hasActionErrors() {
164:                return validationAware.hasActionErrors();
165:            }
166:
167:            public boolean hasActionMessages() {
168:                return validationAware.hasActionMessages();
169:            }
170:
171:            public boolean hasErrors() {
172:                return validationAware.hasErrors();
173:            }
174:
175:            public boolean hasFieldErrors() {
176:                return validationAware.hasFieldErrors();
177:            }
178:
179:            public static TextProvider makeTextProvider(Object object,
180:                    LocaleProvider localeProvider) {
181:                if (object instanceof  TextProvider) {
182:                    return (TextProvider) object;
183:                } else {
184:                    // the object argument passed through here will most probably be an ActionSupport decendant which does
185:                    // implements TextProvider.
186:                    if ((object != null) && (object instanceof  TextProvider)) {
187:                        return new CompositeTextProvider(new TextProvider[] {
188:                                ((TextProvider) object),
189:                                new TextProviderSupport(object.getClass(),
190:                                        localeProvider) });
191:                    } else {
192:                        return new TextProviderSupport(object.getClass(),
193:                                localeProvider);
194:                    }
195:                }
196:            }
197:
198:            protected static LocaleProvider makeLocaleProvider(Object object) {
199:                if (object instanceof  LocaleProvider) {
200:                    return (LocaleProvider) object;
201:                } else {
202:                    return new ActionContextLocaleProvider();
203:                }
204:            }
205:
206:            protected static ValidationAware makeValidationAware(Object object) {
207:                if (object instanceof  ValidationAware) {
208:                    return (ValidationAware) object;
209:                } else {
210:                    return new LoggingValidationAware(object);
211:                }
212:            }
213:
214:            protected void setTextProvider(TextProvider textProvider) {
215:                this .textProvider = textProvider;
216:            }
217:
218:            protected TextProvider getTextProvider() {
219:                return textProvider;
220:            }
221:
222:            protected void setValidationAware(ValidationAware validationAware) {
223:                this .validationAware = validationAware;
224:            }
225:
226:            protected ValidationAware getValidationAware() {
227:                return validationAware;
228:            }
229:
230:            /**
231:             * An implementation of LocaleProvider which gets the locale from the action context.
232:             */
233:            private static class ActionContextLocaleProvider implements 
234:                    LocaleProvider {
235:                public Locale getLocale() {
236:                    return ActionContext.getContext().getLocale();
237:                }
238:            }
239:
240:            /**
241:             * An implementation of ValidationAware which logs errors and messages. 
242:             */
243:            private static class LoggingValidationAware implements 
244:                    ValidationAware {
245:
246:                private Log log;
247:
248:                public LoggingValidationAware(Class clazz) {
249:                    log = LogFactory.getLog(clazz);
250:                }
251:
252:                public LoggingValidationAware(Object obj) {
253:                    log = LogFactory.getLog(obj.getClass());
254:                }
255:
256:                public void setActionErrors(Collection errorMessages) {
257:                    for (Iterator iterator = errorMessages.iterator(); iterator
258:                            .hasNext();) {
259:                        String s = (String) iterator.next();
260:                        addActionError(s);
261:                    }
262:                }
263:
264:                public Collection getActionErrors() {
265:                    return null;
266:                }
267:
268:                public void setActionMessages(Collection messages) {
269:                    for (Iterator iterator = messages.iterator(); iterator
270:                            .hasNext();) {
271:                        String s = (String) iterator.next();
272:                        addActionMessage(s);
273:                    }
274:                }
275:
276:                public Collection getActionMessages() {
277:                    return null;
278:                }
279:
280:                public void setFieldErrors(Map errorMap) {
281:                    for (Iterator iterator = errorMap.entrySet().iterator(); iterator
282:                            .hasNext();) {
283:                        Map.Entry entry = (Map.Entry) iterator.next();
284:                        addFieldError((String) entry.getKey(), (String) entry
285:                                .getValue());
286:                    }
287:                }
288:
289:                public Map getFieldErrors() {
290:                    return null;
291:                }
292:
293:                public void addActionError(String anErrorMessage) {
294:                    log.error("Validation error: " + anErrorMessage);
295:                }
296:
297:                public void addActionMessage(String aMessage) {
298:                    log.info("Validation Message: " + aMessage);
299:                }
300:
301:                public void addFieldError(String fieldName, String errorMessage) {
302:                    log.error("Validation error for " + fieldName + ":"
303:                            + errorMessage);
304:                }
305:
306:                public boolean hasActionErrors() {
307:                    return false;
308:                }
309:
310:                public boolean hasActionMessages() {
311:                    return false;
312:                }
313:
314:                public boolean hasErrors() {
315:                    return false;
316:                }
317:
318:                public boolean hasFieldErrors() {
319:                    return false;
320:                }
321:            }
322:        }
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