Source Code Cross Referenced for TapestryIOCModule.java in  » Web-Framework » Tapestry » org » apache » tapestry » ioc » services » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Web Framework » Tapestry » org.apache.tapestry.ioc.services 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        // Copyright 2006, 2007 The Apache Software Foundation
002:        //
003:        // Licensed under the Apache License, Version 2.0 (the "License");
004:        // you may not use this file except in compliance with the License.
005:        // You may obtain a copy of the License at
006:        //
007:        //     http://www.apache.org/licenses/LICENSE-2.0
008:        //
009:        // Unless required by applicable law or agreed to in writing, software
010:        // distributed under the License is distributed on an "AS IS" BASIS,
011:        // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012:        // See the License for the specific language governing permissions and
013:        // limitations under the License.
014:
015:        package org.apache.tapestry.ioc.services;
016:
017:        import static org.apache.tapestry.ioc.IOCConstants.PERTHREAD_SCOPE;
018:
019:        import java.math.BigDecimal;
020:        import java.math.BigInteger;
021:        import java.util.Arrays;
022:        import java.util.Collection;
023:        import java.util.Collections;
024:        import java.util.List;
025:        import java.util.Map;
026:
027:        import org.apache.tapestry.ioc.AnnotationProvider;
028:        import org.apache.tapestry.ioc.Configuration;
029:        import org.apache.tapestry.ioc.MappedConfiguration;
030:        import org.apache.tapestry.ioc.ObjectProvider;
031:        import org.apache.tapestry.ioc.OrderedConfiguration;
032:        import org.apache.tapestry.ioc.ServiceBinder;
033:        import org.apache.tapestry.ioc.ServiceLifecycle;
034:        import org.apache.tapestry.ioc.ObjectLocator;
035:        import org.apache.tapestry.ioc.annotations.InjectService;
036:        import org.apache.tapestry.ioc.annotations.Value;
037:        import org.apache.tapestry.ioc.internal.services.ChainBuilderImpl;
038:        import org.apache.tapestry.ioc.internal.services.DefaultImplementationBuilderImpl;
039:        import org.apache.tapestry.ioc.internal.services.ExceptionAnalyzerImpl;
040:        import org.apache.tapestry.ioc.internal.services.ExceptionTrackerImpl;
041:        import org.apache.tapestry.ioc.internal.services.LoggingDecoratorImpl;
042:        import org.apache.tapestry.ioc.internal.services.MapSymbolProvider;
043:        import org.apache.tapestry.ioc.internal.services.PerThreadServiceLifecycle;
044:        import org.apache.tapestry.ioc.internal.services.PipelineBuilderImpl;
045:        import org.apache.tapestry.ioc.internal.services.PropertyAccessImpl;
046:        import org.apache.tapestry.ioc.internal.services.PropertyShadowBuilderImpl;
047:        import org.apache.tapestry.ioc.internal.services.StrategyBuilderImpl;
048:        import org.apache.tapestry.ioc.internal.services.SymbolObjectProvider;
049:        import org.apache.tapestry.ioc.internal.services.SymbolSourceImpl;
050:        import org.apache.tapestry.ioc.internal.services.SystemPropertiesSymbolProvider;
051:        import org.apache.tapestry.ioc.internal.services.ThreadLocaleImpl;
052:        import org.apache.tapestry.ioc.internal.services.TypeCoercerImpl;
053:        import org.apache.tapestry.ioc.internal.services.ValueObjectProvider;
054:
055:        /**
056:         * Defines the base set of services for the Tapestry IOC container.
057:         */
058:        public final class TapestryIOCModule {
059:            public static void bind(ServiceBinder binder) {
060:                binder.bind(LoggingDecorator.class, LoggingDecoratorImpl.class);
061:                binder.bind(ChainBuilder.class, ChainBuilderImpl.class);
062:                binder.bind(PropertyAccess.class, PropertyAccessImpl.class);
063:                binder.bind(StrategyBuilder.class, StrategyBuilderImpl.class);
064:                binder.bind(PropertyShadowBuilder.class,
065:                        PropertyShadowBuilderImpl.class);
066:                binder.bind(PipelineBuilder.class, PipelineBuilderImpl.class);
067:                binder.bind(DefaultImplementationBuilder.class,
068:                        DefaultImplementationBuilderImpl.class);
069:                binder.bind(ExceptionTracker.class, ExceptionTrackerImpl.class);
070:                binder.bind(ExceptionAnalyzer.class,
071:                        ExceptionAnalyzerImpl.class);
072:                binder.bind(TypeCoercer.class, TypeCoercerImpl.class);
073:                binder.bind(ThreadLocale.class, ThreadLocaleImpl.class);
074:                binder.bind(SymbolSource.class, SymbolSourceImpl.class);
075:                binder.bind(SymbolProvider.class, MapSymbolProvider.class)
076:                        .withId("ApplicationDefaults");
077:                binder.bind(SymbolProvider.class, MapSymbolProvider.class)
078:                        .withId("FactoryDefaults");
079:            }
080:
081:            /**
082:             * Provides access to additional service lifecycles. One lifecycles is built in ("singleton")
083:             * but additional ones are accessed via this service (and its mapped configuration). Only
084:             * proxiable services (those with explicit service interfaces) can be managed in terms of a
085:             * lifecycle.
086:             */
087:            public static ServiceLifecycleSource build(
088:                    final Map<String, ServiceLifecycle> configuration) {
089:                return new ServiceLifecycleSource() {
090:                    public ServiceLifecycle get(String lifecycleName) {
091:                        return configuration.get(lifecycleName);
092:                    }
093:                };
094:            }
095:
096:            /** Contributes the "perthread" scope. */
097:            public void contributeServiceLifecycleSource(
098:                    MappedConfiguration<String, ServiceLifecycle> configuration,
099:                    ObjectLocator locator) {
100:                configuration.add(PERTHREAD_SCOPE, locator
101:                        .autobuild(PerThreadServiceLifecycle.class));
102:            }
103:
104:            /**
105:             * The master {@link ObjectProvider} is responsible for identifying a particular ObjectProvider
106:             * by its prefix, and delegating to that instance.
107:             */
108:            public static ObjectProvider buildMasterObjectProvider(
109:                    List<ObjectProvider> configuration,
110:
111:                    @InjectService("ChainBuilder")
112:                    ChainBuilder chainBuilder) {
113:                return chainBuilder.build(ObjectProvider.class, configuration);
114:            }
115:
116:            /**
117:             * Contributes "DefaultProvider", ordered last, that delegates to
118:             * {@link ObjectLocator#getService(Class)}.
119:             * <p>
120:             * Contributes "Value", which injects values (not services) triggered by the {@link Value}
121:             * annotation.
122:             */
123:            public static void contributeMasterObjectProvider(
124:                    OrderedConfiguration<ObjectProvider> configuration,
125:
126:                    ObjectLocator locator) {
127:                ObjectProvider defaultProvider = new ObjectProvider() {
128:
129:                    public <T> T provide(Class<T> objectType,
130:                            AnnotationProvider annotationProvider,
131:                            ObjectLocator locator) {
132:                        return locator.getService(objectType);
133:                    }
134:                };
135:
136:                configuration
137:                        .add("DefaultProvider", defaultProvider, "after:*");
138:                configuration.add("Value", locator
139:                        .autobuild(ValueObjectProvider.class));
140:                configuration.add("Symbol", locator
141:                        .autobuild(SymbolObjectProvider.class));
142:            }
143:
144:            /**
145:             * Contributes a set of standard type coercions:
146:             * <ul>
147:             * <li>Object to String</li>
148:             * <li>String to Double</li>
149:             * <li>String to BigDecimal</li>
150:             * <li>BigDecimal to Double</li>
151:             * <li>Double to BigDecimal</li>
152:             * <li>String to BigInteger</li>
153:             * <li>BigInteger to Long</li>
154:             * <li>String to Long</li>
155:             * <li>Long to Byte</li>
156:             * <li>Long to Short</li>
157:             * <li>Long to Integer</li>
158:             * <li>Double to Long</li>
159:             * <li>Double to Float</li>
160:             * <li>Float to Double</li>
161:             * <li>Long to Double</li>
162:             * <li>String to Boolean ("false" is always false, other non-blank strings are true)</li>
163:             * <li>Long to Boolean (true if long value is non zero)</li>
164:             * <li>Null to Boolean (always false)</li>
165:             * <li>Null to String (still null)</li>
166:             * <li>Collection to Boolean (false if empty)</li>
167:             * <li>Object[] to List</li>
168:             * <li>Object to List (by wrapping as a singleton list)</li>
169:             * <li>Null to List (still null)</li>
170:             * </ul>
171:             * 
172:             * @see #buildTypeCoercer(Collection, ComponentInstantiatorSource)
173:             */
174:
175:            public static void contributeTypeCoercer(
176:                    Configuration<CoercionTuple> configuration) {
177:                add(configuration, Object.class, String.class,
178:                        new Coercion<Object, String>() {
179:                            public String coerce(Object input) {
180:                                return input.toString();
181:                            }
182:                        });
183:
184:                // This is necessary, otherwise we get a failure because void --> Object : Object --> String
185:                // throws an NPE
186:
187:                add(configuration, void.class, String.class,
188:                        new Coercion<Void, String>() {
189:                            public String coerce(Void input) {
190:                                return null;
191:                            }
192:                        });
193:
194:                // This keeps a null -> List from being null -> Object : Object -> List (i.e., an empty List
195:                // of a single null).
196:
197:                add(configuration, void.class, List.class,
198:                        new Coercion<Void, List>() {
199:                            public List coerce(Void input) {
200:                                return null;
201:                            }
202:                        });
203:
204:                add(configuration, String.class, Double.class,
205:                        new Coercion<String, Double>() {
206:                            public Double coerce(String input) {
207:                                return new Double(input);
208:                            }
209:                        });
210:
211:                // String to BigDecimal is important, as String->Double->BigDecimal would lose
212:                // precision.
213:
214:                add(configuration, String.class, BigDecimal.class,
215:                        new Coercion<String, BigDecimal>() {
216:                            public BigDecimal coerce(String input) {
217:                                return new BigDecimal(input);
218:                            }
219:                        });
220:
221:                add(configuration, BigDecimal.class, Double.class,
222:                        new Coercion<BigDecimal, Double>() {
223:                            public Double coerce(BigDecimal input) {
224:                                return input.doubleValue();
225:                            }
226:                        });
227:
228:                add(configuration, String.class, BigInteger.class,
229:                        new Coercion<String, BigInteger>() {
230:                            public BigInteger coerce(String input) {
231:                                return new BigInteger(input);
232:                            }
233:                        });
234:
235:                add(configuration, String.class, Long.class,
236:                        new Coercion<String, Long>() {
237:                            public Long coerce(String input) {
238:                                return new Long(input);
239:                            }
240:                        });
241:
242:                add(configuration, Long.class, Byte.class,
243:                        new Coercion<Long, Byte>() {
244:                            public Byte coerce(Long input) {
245:                                return input.byteValue();
246:                            }
247:                        });
248:
249:                add(configuration, Long.class, Short.class,
250:                        new Coercion<Long, Short>() {
251:                            public Short coerce(Long input) {
252:                                return input.shortValue();
253:                            }
254:                        });
255:
256:                add(configuration, Long.class, Integer.class,
257:                        new Coercion<Long, Integer>() {
258:                            public Integer coerce(Long input) {
259:                                return input.intValue();
260:                            }
261:                        });
262:
263:                add(configuration, Number.class, Long.class,
264:                        new Coercion<Number, Long>() {
265:                            public Long coerce(Number input) {
266:                                return input.longValue();
267:                            }
268:                        });
269:
270:                add(configuration, Double.class, Float.class,
271:                        new Coercion<Double, Float>() {
272:                            public Float coerce(Double input) {
273:                                return input.floatValue();
274:                            }
275:                        });
276:
277:                add(configuration, Long.class, Double.class,
278:                        new Coercion<Long, Double>() {
279:                            public Double coerce(Long input) {
280:                                return input.doubleValue();
281:                            }
282:                        });
283:
284:                add(configuration, String.class, Boolean.class,
285:                        new Coercion<String, Boolean>() {
286:                            public Boolean coerce(String input) {
287:                                String trimmed = input.trim();
288:
289:                                if (trimmed.equalsIgnoreCase("false")
290:                                        || trimmed.length() == 0)
291:                                    return false;
292:
293:                                // Any non-blank string but "false"
294:
295:                                return true;
296:                            }
297:                        });
298:
299:                add(configuration, Long.class, Boolean.class,
300:                        new Coercion<Long, Boolean>() {
301:                            public Boolean coerce(Long input) {
302:                                return input.longValue() != 0;
303:                            }
304:                        });
305:
306:                add(configuration, void.class, Boolean.class,
307:                        new Coercion<Void, Boolean>() {
308:                            public Boolean coerce(Void input) {
309:                                return false;
310:                            }
311:                        });
312:
313:                add(configuration, Collection.class, Boolean.class,
314:                        new Coercion<Collection, Boolean>() {
315:                            public Boolean coerce(Collection input) {
316:                                return !input.isEmpty();
317:                            }
318:                        });
319:
320:                add(configuration, Object.class, List.class,
321:                        new Coercion<Object, List>() {
322:                            public List coerce(Object input) {
323:                                return Collections.singletonList(input);
324:                            }
325:                        });
326:
327:                add(configuration, Object[].class, List.class,
328:                        new Coercion<Object[], List>() {
329:                            public List coerce(Object[] input) {
330:                                return Arrays.asList(input);
331:                            }
332:                        });
333:
334:                add(configuration, Float.class, Double.class,
335:                        new Coercion<Float, Double>() {
336:                            public Double coerce(Float input) {
337:                                return input.doubleValue();
338:                            }
339:                        });
340:            }
341:
342:            private static <S, T> void add(
343:                    Configuration<CoercionTuple> configuration,
344:                    Class<S> sourceType, Class<T> targetType,
345:                    Coercion<S, T> coercion) {
346:                CoercionTuple<S, T> tuple = new CoercionTuple<S, T>(sourceType,
347:                        targetType, coercion);
348:
349:                configuration.add(tuple);
350:            }
351:
352:            public static void contributeSymbolSource(
353:                    OrderedConfiguration<SymbolProvider> configuration,
354:                    @InjectService("ApplicationDefaults")
355:                    SymbolProvider applicationDefaults,
356:                    @InjectService("FactoryDefaults")
357:                    SymbolProvider factoryDefaults) {
358:                configuration.add("SystemProperties",
359:                        new SystemPropertiesSymbolProvider());
360:                configuration.add("ApplicationDefaults", applicationDefaults,
361:                        "after:SystemProperties");
362:                configuration.add("FactoryDefaults", factoryDefaults,
363:                        "after:ApplicationDefaults");
364:            }
365:        }
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