public static <T> T newInstance(Class<T> clazz) {
T result = null;
try {
result = clazz.newInstance();
} catch (InstantiationException e) {
MappingUtils.throwMappingException(e);
} catch (IllegalAccessException e) {
MappingUtils.throwMappingException(e);
}
return result;
}
public static Method getMethod(Class<?> clazz, String methodName) {
Method result = findMethod(clazz, methodName);
if (result == null) {
MappingUtils.throwMappingException(
"No method found for class:" + clazz + " and method name:" + methodName);
}
return result;
}
public static Object invoke(Method method, Object obj, Object[] args) {
Object result = null;
try {
result = method.invoke(obj, args);
} catch (IllegalArgumentException e) {
if (e.getMessage().equals(IAE_MESSAGE)) {
MappingUtils.throwMappingException(prepareExceptionMessage(method, args), e);
}
MappingUtils.throwMappingException(e);
} catch (IllegalAccessException e) {
MappingUtils.throwMappingException(e);
} catch (InvocationTargetException e) {
MappingUtils.throwMappingException(e);
}
return result;
}
public static DeepHierarchyElement[] getDeepFieldHierarchy(
Class<?> parentClass, String field, HintContainer deepIndexHintContainer) {
if (!MappingUtils.isDeepMapping(field)) {
MappingUtils.throwMappingException("Field does not contain deep field delimitor");
}
StringTokenizer toks = new StringTokenizer(field, DozerConstants.DEEP_FIELD_DELIMITER);
Class<?> latestClass = parentClass;
DeepHierarchyElement[] hierarchy = new DeepHierarchyElement[toks.countTokens()];
int index = 0;
int hintIndex = 0;
while (toks.hasMoreTokens()) {
String aFieldName = toks.nextToken();
String theFieldName = aFieldName;
int collectionIndex = -1;
if (aFieldName.contains("[")) {
theFieldName = aFieldName.substring(0, aFieldName.indexOf("["));
collectionIndex =
Integer.parseInt(
aFieldName.substring(aFieldName.indexOf("[") + 1, aFieldName.indexOf("]")));
}
PropertyDescriptor propDescriptor =
findPropertyDescriptor(latestClass, theFieldName, deepIndexHintContainer);
DeepHierarchyElement r = new DeepHierarchyElement(propDescriptor, collectionIndex);
if (propDescriptor == null) {
MappingUtils.throwMappingException(
"Exception occurred determining deep field hierarchy for Class --> "
+ parentClass.getName()
+ ", Field --> "
+ field
+ ". Unable to determine property descriptor for Class --> "
+ latestClass.getName()
+ ", Field Name: "
+ aFieldName);
}
latestClass = propDescriptor.getPropertyType();
if (toks.hasMoreTokens()) {
if (latestClass.isArray()) {
latestClass = latestClass.getComponentType();
} else if (Collection.class.isAssignableFrom(latestClass)) {
Class<?> genericType = determineGenericsType(propDescriptor);
if (genericType == null && deepIndexHintContainer == null) {
MappingUtils.throwMappingException(
"Hint(s) or Generics not specified. Hint(s) or Generics must be specified for deep mapping with indexed field(s). Exception occurred determining deep field hierarchy for Class --> "
+ parentClass.getName()
+ ", Field --> "
+ field
+ ". Unable to determine property descriptor for Class --> "
+ latestClass.getName()
+ ", Field Name: "
+ aFieldName);
}
if (genericType != null) {
latestClass = genericType;
} else {
latestClass = deepIndexHintContainer.getHint(hintIndex);
hintIndex += 1;
}
}
}
hierarchy[index++] = r;
}
return hierarchy;
}
