private static WriteablePropertyDescriptor findDescriptor(
Class clazz, String propertyName, Set<WriteablePropertyDescriptor> writables)
throws ExprValidationException {
for (WriteablePropertyDescriptor desc : writables) {
if (desc.getPropertyName().toLowerCase().equals(propertyName.toLowerCase())) {
return desc;
}
}
return null;
}
public static void populateObject(
String operatorName,
int operatorNum,
String dataFlowName,
Map<String, Object> objectProperties,
Object top,
EngineImportService engineImportService,
EPDataFlowOperatorParameterProvider optionalParameterProvider,
Map<String, Object> optionalParameterURIs)
throws ExprValidationException {
Class applicableClass = top.getClass();
Set<WriteablePropertyDescriptor> writables =
PropertyHelper.getWritableProperties(applicableClass);
Set<Field> annotatedFields =
JavaClassHelper.findAnnotatedFields(top.getClass(), DataFlowOpParameter.class);
Set<Method> annotatedMethods =
JavaClassHelper.findAnnotatedMethods(top.getClass(), DataFlowOpParameter.class);
// find catch-all methods
Set<Method> catchAllMethods = new LinkedHashSet<Method>();
if (annotatedMethods != null) {
for (Method method : annotatedMethods) {
DataFlowOpParameter anno =
(DataFlowOpParameter)
JavaClassHelper.getAnnotations(
DataFlowOpParameter.class, method.getDeclaredAnnotations())
.get(0);
if (anno.all()) {
if (method.getParameterTypes().length == 2
&& method.getParameterTypes()[0] == String.class
&& method.getParameterTypes()[1] == Object.class) {
catchAllMethods.add(method);
continue;
}
throw new ExprValidationException("Invalid annotation for catch-call");
}
}
}
// map provided values
for (Map.Entry<String, Object> property : objectProperties.entrySet()) {
boolean found = false;
String propertyName = property.getKey();
// invoke catch-all setters
for (Method method : catchAllMethods) {
try {
method.invoke(top, new Object[] {propertyName, property.getValue()});
} catch (IllegalAccessException e) {
throw new ExprValidationException(
"Illegal access invoking method for property '"
+ propertyName
+ "' for class "
+ applicableClass.getName()
+ " method "
+ method.getName(),
e);
} catch (InvocationTargetException e) {
throw new ExprValidationException(
"Exception invoking method for property '"
+ propertyName
+ "' for class "
+ applicableClass.getName()
+ " method "
+ method.getName()
+ ": "
+ e.getTargetException().getMessage(),
e);
}
found = true;
}
if (propertyName.toLowerCase().equals(CLASS_PROPERTY_NAME)) {
continue;
}
// use the writeable property descriptor (appropriate setter method) from writing the property
WriteablePropertyDescriptor descriptor =
findDescriptor(applicableClass, propertyName, writables);
if (descriptor != null) {
Object coerceProperty =
coerceProperty(
propertyName,
applicableClass,
property.getValue(),
descriptor.getType(),
engineImportService,
false);
try {
descriptor.getWriteMethod().invoke(top, new Object[] {coerceProperty});
} catch (IllegalArgumentException e) {
throw new ExprValidationException(
"Illegal argument invoking setter method for property '"
+ propertyName
+ "' for class "
+ applicableClass.getName()
+ " method "
+ descriptor.getWriteMethod().getName()
+ " provided value "
+ coerceProperty,
e);
} catch (IllegalAccessException e) {
throw new ExprValidationException(
"Illegal access invoking setter method for property '"
+ propertyName
+ "' for class "
+ applicableClass.getName()
+ " method "
+ descriptor.getWriteMethod().getName(),
e);
} catch (InvocationTargetException e) {
throw new ExprValidationException(
"Exception invoking setter method for property '"
+ propertyName
+ "' for class "
+ applicableClass.getName()
+ " method "
+ descriptor.getWriteMethod().getName()
+ ": "
+ e.getTargetException().getMessage(),
e);
}
continue;
}
// find the field annotated with {@link @GraphOpProperty}
for (Field annotatedField : annotatedFields) {
DataFlowOpParameter anno =
(DataFlowOpParameter)
JavaClassHelper.getAnnotations(
DataFlowOpParameter.class, annotatedField.getDeclaredAnnotations())
.get(0);
if (anno.name().equals(propertyName) || annotatedField.getName().equals(propertyName)) {
Object coerceProperty =
coerceProperty(
propertyName,
applicableClass,
property.getValue(),
annotatedField.getType(),
engineImportService,
true);
try {
annotatedField.setAccessible(true);
annotatedField.set(top, coerceProperty);
} catch (Exception e) {
throw new ExprValidationException(
"Failed to set field '" + annotatedField.getName() + "': " + e.getMessage(), e);
}
found = true;
break;
}
}
if (found) {
continue;
}
throw new ExprValidationException(
"Failed to find writable property '"
+ propertyName
+ "' for class "
+ applicableClass.getName());
}
// second pass: if a parameter URI - value pairs were provided, check that
if (optionalParameterURIs != null) {
for (Field annotatedField : annotatedFields) {
try {
annotatedField.setAccessible(true);
String uri = operatorName + "/" + annotatedField.getName();
if (optionalParameterURIs.containsKey(uri)) {
Object value = optionalParameterURIs.get(uri);
annotatedField.set(top, value);
if (log.isDebugEnabled()) {
log.debug(
"Found parameter '"
+ uri
+ "' for data flow "
+ dataFlowName
+ " setting "
+ value);
}
} else {
if (log.isDebugEnabled()) {
log.debug("Not found parameter '" + uri + "' for data flow " + dataFlowName);
}
}
} catch (Exception e) {
throw new ExprValidationException(
"Failed to set field '" + annotatedField.getName() + "': " + e.getMessage(), e);
}
}
}
// third pass: if a parameter provider is provided, use that
if (optionalParameterProvider != null) {
for (Field annotatedField : annotatedFields) {
try {
annotatedField.setAccessible(true);
Object provided = annotatedField.get(top);
Object value =
optionalParameterProvider.provide(
new EPDataFlowOperatorParameterProviderContext(
operatorName,
annotatedField.getName(),
top,
operatorNum,
provided,
dataFlowName));
if (value != null) {
annotatedField.set(top, value);
}
} catch (Exception e) {
throw new ExprValidationException(
"Failed to set field '" + annotatedField.getName() + "': " + e.getMessage(), e);
}
}
}
}