001 /**
002 *
003 * Copyright 2003-2004 The Apache Software Foundation
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017 package org.apache.geronimo.gbean;
018
019 import java.beans.Introspector;
020 import java.lang.reflect.Constructor;
021 import java.lang.reflect.Method;
022 import java.util.Collection;
023 import java.util.HashMap;
024 import java.util.HashSet;
025 import java.util.Iterator;
026 import java.util.List;
027 import java.util.Map;
028 import java.util.Set;
029 import java.util.Arrays;
030
031 import org.apache.geronimo.kernel.ClassLoading;
032 import org.apache.geronimo.kernel.Kernel;
033
034 /**
035 * @version $Rev: 471683 $ $Date: 2006-11-06 02:28:54 -0800 (Mon, 06 Nov 2006) $
036 */
037 public class GBeanInfoBuilder {
038 public static GBeanInfoBuilder createStatic(Class gbeanType) {
039 if (gbeanType == null) throw new NullPointerException("gbeanType is null");
040 return createStatic(gbeanType, gbeanType.getName(), gbeanType, null, null);
041 }
042
043 public static GBeanInfoBuilder createStatic(Class gbeanType, String j2eeType) {
044 if (gbeanType == null) throw new NullPointerException("gbeanType is null");
045 return createStatic(gbeanType, gbeanType.getName(), gbeanType, null, j2eeType);
046 }
047
048 public static GBeanInfoBuilder createStatic(String name, Class gbeanType) {
049 if (gbeanType == null) throw new NullPointerException("gbeanType is null");
050 return createStatic(gbeanType, name, gbeanType, null, null);
051 }
052
053 public static GBeanInfoBuilder createStatic(String name, Class gbeanType, String j2eeType) {
054 if (gbeanType == null) throw new NullPointerException("gbeanType is null");
055 return createStatic(gbeanType, name, gbeanType, null, j2eeType);
056 }
057
058 public static GBeanInfoBuilder createStatic(Class gbeanType, GBeanInfo source) {
059 if (gbeanType == null) throw new NullPointerException("gbeanType is null");
060 return createStatic(gbeanType, gbeanType.getName(), gbeanType, source, null);
061 }
062
063 public static GBeanInfoBuilder createStatic(Class gbeanType, GBeanInfo source, String j2eeType) {
064 if (gbeanType == null) throw new NullPointerException("gbeanType is null");
065 return createStatic(gbeanType, gbeanType.getName(), gbeanType, source, j2eeType);
066 }
067
068 public static GBeanInfoBuilder createStatic(String name, Class gbeanType, GBeanInfo source) {
069 if (name == null) throw new NullPointerException("name is null");
070 if (gbeanType == null) throw new NullPointerException("gbeanType is null");
071 return createStatic(gbeanType, name, gbeanType, source, null);
072 }
073
074 //
075 // These methods are used by classes that declare a GBeanInfo for another class
076 //
077 public static GBeanInfoBuilder createStatic(Class sourceClass, Class gbeanType) {
078 if (gbeanType == null) throw new NullPointerException("gbeanType is null");
079 return createStatic(sourceClass, gbeanType.getName(), gbeanType, null, null);
080 }
081
082 public static GBeanInfoBuilder createStatic(Class sourceClass, Class gbeanType, String j2eeType) {
083 if (sourceClass == null) throw new NullPointerException("sourceClass is null");
084 if (gbeanType == null) throw new NullPointerException("gbeanType is null");
085 return createStatic(sourceClass, gbeanType.getName(), gbeanType, null, j2eeType);
086 }
087
088 public static GBeanInfoBuilder createStatic(Class sourceClass, Class gbeanType, GBeanInfo source, String j2eeType) {
089 if (sourceClass == null) throw new NullPointerException("sourceClass is null");
090 if (gbeanType == null) throw new NullPointerException("gbeanType is null");
091 return createStatic(sourceClass, gbeanType.getName(), gbeanType, source, j2eeType);
092 }
093
094 public static GBeanInfoBuilder createStatic(Class sourceClass, String name, Class gbeanType, String j2eeType) {
095 if (sourceClass == null) throw new NullPointerException("sourceClass is null");
096 if (name == null) throw new NullPointerException("name is null");
097 if (gbeanType == null) throw new NullPointerException("gbeanType is null");
098 return createStatic(sourceClass, name, gbeanType, null, j2eeType);
099 }
100
101 public static GBeanInfoBuilder createStatic(Class sourceClass, String name, Class gbeanType, GBeanInfo source, String j2eeType) {
102 if (sourceClass == null) throw new NullPointerException("sourceClass is null");
103 if (name == null) throw new NullPointerException("name is null");
104 if (gbeanType == null) throw new NullPointerException("gbeanType is null");
105 return new GBeanInfoBuilder(sourceClass.getName(), name, gbeanType, source, j2eeType);
106 }
107
108 public static final String DEFAULT_J2EE_TYPE = "GBean"; //NameFactory.GERONIMO_SERVICE
109
110 private static final Class[] NO_ARGS = {};
111
112 /**
113 * The class from which the info can be retrieved using GBeanInfo.getGBeanInfo(className, classLoader)
114 */
115 private final String sourceClass;
116
117 private final String name;
118
119 private final String j2eeType;
120
121 private final Class gbeanType;
122
123 private final Map attributes = new HashMap();
124
125 private GConstructorInfo constructor = new GConstructorInfo();
126
127 private final Map operations = new HashMap();
128
129 private final Map references = new HashMap();
130
131 private final Set interfaces = new HashSet();
132
133 private int priority = GBeanInfo.PRIORITY_NORMAL;
134
135 public GBeanInfoBuilder(Class gbeanType) {
136 this(checkNotNull(gbeanType).getName(), gbeanType, null, null);
137 }
138
139 public GBeanInfoBuilder(Class gbeanType, String j2eeType) {
140 this(checkNotNull(gbeanType).getName(), gbeanType, null, j2eeType);
141 }
142
143 public GBeanInfoBuilder(String name, Class gbeanType) {
144 this(name, checkNotNull(gbeanType), null, null);
145 }
146
147 public GBeanInfoBuilder(String name, Class gbeanType, String j2eeType) {
148 this(name, checkNotNull(gbeanType), null, j2eeType);
149 }
150
151 public GBeanInfoBuilder(Class gbeanType, GBeanInfo source) {
152 this(checkNotNull(gbeanType).getName(), gbeanType, source);
153 }
154
155 public GBeanInfoBuilder(Class gbeanType, GBeanInfo source, String j2eeType) {
156 this(checkNotNull(gbeanType).getName(), gbeanType, source, j2eeType);
157 }
158
159 //TODO remove this
160 /**
161 * @deprecated This will be removed in a future release
162 */
163 public GBeanInfoBuilder(String name, ClassLoader classLoader) {
164 this(checkNotNull(name), loadClass(classLoader, name), GBeanInfo.getGBeanInfo(name, classLoader));
165 }
166
167 public GBeanInfoBuilder(String name, Class gbeanType, GBeanInfo source) {
168 this(name, gbeanType, source, null);
169 }
170
171 public GBeanInfoBuilder(String name, Class gbeanType, GBeanInfo source, String j2eeType) {
172 this(null, name, gbeanType, source, j2eeType);
173 }
174
175 private GBeanInfoBuilder(String sourceClass, String name, Class gbeanType, GBeanInfo source, String j2eeType) {
176 checkNotNull(name);
177 checkNotNull(gbeanType);
178 this.name = name;
179 this.gbeanType = gbeanType;
180 this.sourceClass = sourceClass;
181
182 if (source != null) {
183 for (Iterator i = source.getAttributes().iterator(); i.hasNext();) {
184 GAttributeInfo attributeInfo = (GAttributeInfo) i.next();
185 attributes.put(attributeInfo.getName(), attributeInfo);
186 }
187
188 for (Iterator i = source.getOperations().iterator(); i.hasNext();) {
189 GOperationInfo operationInfo = (GOperationInfo) i.next();
190 operations.put(new GOperationSignature(operationInfo.getName(),
191 operationInfo.getParameterList()), operationInfo);
192 }
193
194 for (Iterator iterator = source.getReferences().iterator(); iterator.hasNext();) {
195 GReferenceInfo referenceInfo = (GReferenceInfo) iterator.next();
196 references.put(referenceInfo.getName(), new RefInfo(referenceInfo.getReferenceType(), referenceInfo.getNameTypeName()));
197 }
198
199 for (Iterator iterator = source.getInterfaces().iterator(); iterator.hasNext();) {
200 String intf = (String) iterator.next();
201 interfaces.add(intf);
202 }
203
204 //in case subclass constructor has same parameters as superclass.
205 constructor = source.getConstructor();
206
207 priority = source.getPriority();
208 }
209 if (j2eeType != null) {
210 this.j2eeType = j2eeType;
211 } else if (source != null) {
212 this.j2eeType = source.getJ2eeType();
213 } else {
214 this.j2eeType = DEFAULT_J2EE_TYPE; //NameFactory.GERONIMO_SERVICE
215 }
216
217 // add all interfaces based on GBean type
218 if (gbeanType.isArray()) {
219 throw new IllegalArgumentException("GBean is an array type: gbeanType=" + gbeanType.getName());
220 }
221 Set allTypes = ClassLoading.getAllTypes(gbeanType);
222 for (Iterator iterator = allTypes.iterator(); iterator.hasNext();) {
223 Class type = (Class) iterator.next();
224 addInterface(type);
225 }
226 }
227
228 public void setPersistentAttributes(String[] persistentAttributes) {
229 for (int i = 0; i < persistentAttributes.length; i++) {
230 String attributeName = persistentAttributes[i];
231 GAttributeInfo attribute = (GAttributeInfo) attributes.get(attributeName);
232 if (attribute != null && !references.containsKey(attributeName)) {
233 if (isMagicAttribute(attribute)) {
234 // magic attributes can't be persistent
235 continue;
236 }
237 attributes.put(attributeName,
238 new GAttributeInfo(attributeName,
239 attribute.getType(),
240 true,
241 attribute.isManageable(),
242 attribute.getGetterName(),
243 attribute.getSetterName()));
244 } else {
245 if (attributeName.equals("kernel")) {
246 addAttribute("kernel", Kernel.class, false);
247 } else if (attributeName.equals("classLoader")) {
248 addAttribute("classLoader", ClassLoader.class, false);
249 } else if (attributeName.equals("abstractName")) {
250 addAttribute("abstractName", AbstractName.class, false);
251 } else if (attributeName.equals("objectName")) {
252 addAttribute("obectName", String.class, false);
253 }
254 }
255 }
256 }
257
258 public void setManageableAttributes(String[] manageableAttributes) {
259 for (int i = 0; i < manageableAttributes.length; i++) {
260 String attributeName = manageableAttributes[i];
261 GAttributeInfo attribute = (GAttributeInfo) attributes.get(attributeName);
262 if (attribute != null) {
263 attributes.put(attributeName,
264 new GAttributeInfo(attributeName,
265 attribute.getType(),
266 attribute.isPersistent(),
267 true,
268 attribute.getGetterName(),
269 attribute.getSetterName()));
270 }
271 }
272 }
273
274 private boolean isMagicAttribute(GAttributeInfo attributeInfo) {
275 String name = attributeInfo.getName();
276 String type = attributeInfo.getType();
277 return ("kernel".equals(name) && Kernel.class.getName().equals(type)) ||
278 ("classLoader".equals(name) && ClassLoader.class.getName().equals(type)) ||
279 ("abstractName".equals(name) && AbstractName.class.getName().equals(type)) ||
280 ("objectName".equals(name) && String.class.getName().equals(type));
281 }
282
283 public void addInterface(Class intf) {
284 addInterface(intf, new String[0]);
285 }
286
287 //do not use beaninfo Introspector to list the properties. This method is primarily for interfaces,
288 //and it does not process superinterfaces. It seems to really only work well for classes.
289 public void addInterface(Class intf, String[] persistentAttributes) {
290 addInterface(intf, persistentAttributes, new String[0]);
291 }
292
293 public void addInterface(Class intf, String[] persistentAttributes, String[] manageableAttributes) {
294 Set persistentNames = new HashSet(Arrays.asList(persistentAttributes));
295 Set manageableNames = new HashSet(Arrays.asList(manageableAttributes));
296 Method[] methods = intf.getMethods();
297 for (int i = 0; i < methods.length; i++) {
298 Method method = methods[i];
299 if (isGetter(method)) {
300 String attributeName = getAttributeName(method);
301 GAttributeInfo attribute = (GAttributeInfo) attributes.get(attributeName);
302 String attributeType = method.getReturnType().getName();
303 if (attribute == null) {
304 attributes.put(attributeName,
305 new GAttributeInfo(attributeName,
306 attributeType,
307 persistentNames.contains(attributeName),
308 manageableNames.contains(attributeName),
309 method.getName(),
310 null));
311 } else {
312 if (!attributeType.equals(attribute.getType())) {
313 throw new IllegalArgumentException("Getter and setter type do not match: " + attributeName + " for gbeanType: " + gbeanType.getName());
314 }
315 attributes.put(attributeName,
316 new GAttributeInfo(attributeName,
317 attributeType,
318 attribute.isPersistent() || persistentNames.contains(attributeName),
319 attribute.isManageable() || manageableNames.contains(attributeName),
320 method.getName(),
321 attribute.getSetterName()));
322 }
323 } else if (isSetter(method)) {
324 String attributeName = getAttributeName(method);
325 String attributeType = method.getParameterTypes()[0].getName();
326 GAttributeInfo attribute = (GAttributeInfo) attributes.get(attributeName);
327 if (attribute == null) {
328 attributes.put(attributeName,
329 new GAttributeInfo(attributeName,
330 attributeType,
331 persistentNames.contains(attributeName),
332 manageableNames.contains(attributeName),
333 null,
334 method.getName()));
335 } else {
336 if (!attributeType.equals(attribute.getType())) {
337 throw new IllegalArgumentException("Getter and setter type do not match: " + attributeName + " for gbeanType: " + gbeanType.getName());
338 }
339 attributes.put(attributeName,
340 new GAttributeInfo(attributeName,
341 attributeType,
342 attribute.isPersistent() || persistentNames.contains(attributeName),
343 attribute.isManageable() || manageableNames.contains(attributeName),
344 attribute.getGetterName(),
345 method.getName()));
346 }
347 } else {
348 addOperation(new GOperationInfo(method.getName(), method.getParameterTypes()));
349 }
350 }
351 addInterface(interfaces, intf);
352 }
353
354 private static void addInterface(Set set, Class intf) {
355 String name = intf.getName();
356 if(set.contains(name)) {
357 return;
358 }
359 set.add(name);
360 Class cls[] = intf.getInterfaces();
361 for (int i = 0; i < cls.length; i++) {
362 addInterface(set, cls[i]);
363 }
364 }
365
366 public void addAttribute(String name, Class type, boolean persistent) {
367 addAttribute(name, type.getName(), persistent, true);
368 }
369
370 public void addAttribute(String name, String type, boolean persistent) {
371 addAttribute(name, type, persistent, true);
372 }
373
374 public void addAttribute(String name, Class type, boolean persistent, boolean manageable) {
375 addAttribute(name, type.getName(), persistent, manageable);
376 }
377
378 public void addAttribute(String name, String type, boolean persistent, boolean manageable) {
379 String getter = searchForGetter(name, type, gbeanType);
380 String setter = searchForSetter(name, type, gbeanType);
381 addAttribute(new GAttributeInfo(name, type, persistent, manageable, getter, setter));
382 }
383
384 public void addAttribute(GAttributeInfo info) {
385 attributes.put(info.getName(), info);
386 }
387
388 public void setConstructor(GConstructorInfo constructor) {
389 assert constructor != null;
390 this.constructor = constructor;
391 List names = constructor.getAttributeNames();
392 setPersistentAttributes((String[]) names.toArray(new String[names.size()]));
393 }
394
395 public void setConstructor(String[] names) {
396 constructor = new GConstructorInfo(names);
397 setPersistentAttributes(names);
398 }
399
400 public void addOperation(GOperationInfo operationInfo) {
401 operations.put(new GOperationSignature(operationInfo.getName(), operationInfo.getParameterList()), operationInfo);
402 }
403
404 public void addOperation(String name) {
405 addOperation(new GOperationInfo(name, NO_ARGS));
406 }
407
408 public void addOperation(String name, Class[] paramTypes) {
409 addOperation(new GOperationInfo(name, paramTypes));
410 }
411
412 public void addReference(GReferenceInfo info) {
413 references.put(info.getName(), new RefInfo(info.getReferenceType(), info.getNameTypeName()));
414 }
415
416 /**
417 * Add a reference to another GBean or collection of GBeans
418 * @param name the name of the reference
419 * @param type The proxy type of the GBean or objects in a ReferenceCollection
420 * @param namingType the string expected as the type component of the name. For jsr-77 names this is the j2eeType value
421 */
422 public void addReference(String name, Class type, String namingType) {
423 references.put(name, new RefInfo(type.getName(), namingType));
424 }
425
426 public void addReference(String name, Class type) {
427 references.put(name, new RefInfo(type.getName(), null));
428 }
429
430 public void setPriority(int priority) {
431 this.priority = priority;
432 }
433
434 public GBeanInfo getBeanInfo() {
435 // get the types of the constructor args
436 // this also verifies that we have a valid constructor
437 Map constructorTypes = getConstructorTypes();
438
439 // build the reference infos now that we know the constructor types
440 Set referenceInfos = new HashSet();
441 for (Iterator iterator = references.entrySet().iterator(); iterator.hasNext();) {
442 Map.Entry entry = (Map.Entry) iterator.next();
443 String referenceName = (String) entry.getKey();
444 RefInfo refInfo = (RefInfo) entry.getValue();
445 String referenceType = refInfo.getJavaType();
446 String namingType = refInfo.getNamingType();
447
448 String proxyType = (String) constructorTypes.get(referenceName);
449 String setterName = null;
450 if (proxyType == null) {
451 Method setter = searchForSetterMethod(referenceName, referenceType, gbeanType);
452 if (setter == null) {
453 setter = searchForSetterMethod(referenceName, Collection.class.getName(), gbeanType);
454 if (setter == null) {
455 throw new InvalidConfigurationException("Reference must be a constructor argument or have a setter: name=" + referenceName + " for gbeanType: " + gbeanType);
456 }
457 }
458 proxyType = setter.getParameterTypes()[0].getName();
459
460 setterName = setter.getName();
461 }
462
463 if (!proxyType.equals(Collection.class.getName()) && !proxyType.equals(referenceType)) {
464 throw new InvalidConfigurationException("Reference proxy type must be Collection or " + referenceType + ": name=" + referenceName + " for gbeanType: " + gbeanType.getName());
465 }
466
467 referenceInfos.add(new GReferenceInfo(referenceName, referenceType, proxyType, setterName, namingType));
468 }
469
470 return new GBeanInfo(sourceClass, name, gbeanType.getName(), j2eeType, attributes.values(), constructor, operations.values(), referenceInfos, interfaces, priority);
471 }
472
473 private Map getConstructorTypes() throws InvalidConfigurationException {
474 List arguments = constructor.getAttributeNames();
475 String[] argumentTypes = new String[arguments.size()];
476 boolean[] isReference = new boolean[arguments.size()];
477 for (int i = 0; i < argumentTypes.length; i++) {
478 String argumentName = (String) arguments.get(i);
479 if (references.containsKey(argumentName)) {
480 argumentTypes[i] = ((RefInfo) references.get(argumentName)).getJavaType();
481 isReference[i] = true;
482 } else if (attributes.containsKey(argumentName)) {
483 GAttributeInfo attribute = (GAttributeInfo) attributes.get(argumentName);
484 argumentTypes[i] = attribute.getType();
485 isReference[i] = false;
486 }
487 }
488
489 Constructor[] constructors = gbeanType.getConstructors();
490 Set validConstructors = new HashSet();
491 for (int i = 0; i < constructors.length; i++) {
492 Constructor constructor = constructors[i];
493 if (isValidConstructor(constructor, argumentTypes, isReference)) {
494 validConstructors.add(constructor);
495 }
496 }
497
498 if (validConstructors.isEmpty()) {
499 throw new InvalidConfigurationException("Could not find a valid constructor for GBean: " + gbeanType.getName());
500 }
501 if (validConstructors.size() > 1) {
502 throw new InvalidConfigurationException("More then one valid constructors found for GBean: " + gbeanType.getName());
503 }
504
505 Map constructorTypes = new HashMap();
506 Constructor constructor = (Constructor) validConstructors.iterator().next();
507 Class[] parameterTypes = constructor.getParameterTypes();
508 Iterator argumentIterator = arguments.iterator();
509 for (int i = 0; i < parameterTypes.length; i++) {
510 String parameterType = parameterTypes[i].getName();
511 String argumentName = (String) argumentIterator.next();
512 constructorTypes.put(argumentName, parameterType);
513 }
514 return constructorTypes;
515 }
516
517 private static String searchForGetter(String name, String type, Class gbeanType) throws InvalidConfigurationException {
518 Method getterMethod = null;
519
520 // no explicit name give so we must search for a name
521 String getterName = "get" + name;
522 String isName = "is" + name;
523 Method[] methods = gbeanType.getMethods();
524 for (int i = 0; i < methods.length; i++) {
525 if (methods[i].getParameterTypes().length == 0 && methods[i].getReturnType() != Void.TYPE
526 && (getterName.equalsIgnoreCase(methods[i].getName()) || isName.equalsIgnoreCase(methods[i].getName()))) {
527
528 // found it
529 getterMethod = methods[i];
530 break;
531 }
532 }
533
534 // if the return type of the getter doesn't match, throw an exception
535 if (getterMethod != null && !type.equals(getterMethod.getReturnType().getName())) {
536 throw new InvalidConfigurationException("Incorrect return type for getter method:" +
537 " name=" + name +
538 ", targetClass=" + gbeanType.getName() +
539 ", getter type=" + getterMethod.getReturnType() +
540 ", expected type=" + type);
541 }
542
543 if (getterMethod == null) {
544 return null;
545 }
546 return getterMethod.getName();
547 }
548
549 private static String searchForSetter(String name, String type, Class gbeanType) throws InvalidConfigurationException {
550 Method method = searchForSetterMethod(name, type, gbeanType);
551 if (method == null) {
552 return null;
553 }
554 return method.getName();
555 }
556
557 private static Method searchForSetterMethod(String name, String type, Class gbeanType) throws InvalidConfigurationException {
558 // no explicit name give so we must search for a name
559 String setterName = "set" + name;
560 Method[] methods = gbeanType.getMethods();
561 for (int i = 0; i < methods.length; i++) {
562 Method method = methods[i];
563 if (method.getParameterTypes().length == 1 &&
564 method.getParameterTypes()[0].getName().equals(type) &&
565 method.getReturnType() == Void.TYPE &&
566 setterName.equalsIgnoreCase(method.getName())) {
567
568 return method;
569 }
570 }
571
572 // a setter is not necessary for this attribute
573 return null;
574 }
575
576 private static boolean isValidConstructor(Constructor constructor, String[] argumentTypes, boolean[] isReference) {
577 Class[] parameterTypes = constructor.getParameterTypes();
578
579 // same number of parameters?
580 if (parameterTypes.length != argumentTypes.length) {
581 return false;
582 }
583
584 // is each parameter the correct type?
585 for (int i = 0; i < parameterTypes.length; i++) {
586 String parameterType = parameterTypes[i].getName();
587 if (isReference[i]) {
588 // reference: does type match
589 // OR is it a java.util.Collection
590 // OR is it a java.util.Set?
591 if (!parameterType.equals(argumentTypes[i]) &&
592 !parameterType.equals(Collection.class.getName()) &&
593 !parameterType.equals(Set.class.getName())) {
594 return false;
595 }
596 } else {
597 // attribute: does type match?
598 if (!parameterType.equals(argumentTypes[i])) {
599 return false;
600 }
601 }
602 }
603 return true;
604 }
605
606 private String getAttributeName(Method method) {
607 String name = method.getName();
608 String attributeName = (name.startsWith("get") || name.startsWith("set")) ? name.substring(3) : name.substring(2);
609 attributeName = Introspector.decapitalize(attributeName);
610 return attributeName;
611 }
612
613 private boolean isSetter(Method method) {
614 return method.getName().startsWith("set") && method.getParameterTypes().length == 1;
615 }
616
617 private static boolean isGetter(Method method) {
618 String name = method.getName();
619 return (name.startsWith("get") || name.startsWith("is")) && method.getParameterTypes().length == 0;
620 }
621
622 /**
623 * Checks whether or not the input argument is null; otherwise it throws
624 * {@link IllegalArgumentException}.
625 *
626 * @param clazz the input argument to validate
627 * @throws IllegalArgumentException if input is null
628 */
629 private static Class checkNotNull(final Class clazz) {
630 if (clazz == null) {
631 throw new IllegalArgumentException("null argument supplied");
632 }
633 return clazz;
634 }
635
636 /**
637 * Checks whether or not the input argument is null; otherwise it throws
638 * {@link IllegalArgumentException}.
639 *
640 * @param string the input argument to validate
641 * @throws IllegalArgumentException if input is null
642 */
643 private static String checkNotNull(final String string) {
644 if (string == null) {
645 throw new IllegalArgumentException("null argument supplied");
646 }
647 return string;
648 }
649
650 private static Class loadClass(ClassLoader classLoader, String name) {
651 try {
652 return classLoader.loadClass(name);
653 } catch (ClassNotFoundException e) {
654 throw new InvalidConfigurationException("Could not load class " + name, e);
655 }
656 }
657
658 private static class RefInfo {
659 private final String javaType;
660 private final String namingType;
661
662 public RefInfo(String javaType, String namingType) {
663 this.javaType = javaType;
664 this.namingType = namingType;
665 }
666
667 public String getJavaType() {
668 return javaType;
669 }
670
671 public String getNamingType() {
672 return namingType;
673 }
674 }
675 }