/** @return the find (by ID) method (may return null) */
public MethodMetadata getFindMethod() {
if ("".equals(crudAnnotationValues.getFindMethod())) {
return null;
}
// Method definition to find or build
final String idFieldName = identifierField.getFieldName().getSymbolName();
final JavaSymbolName methodName =
new JavaSymbolName(crudAnnotationValues.getFindMethod() + destination.getSimpleTypeName());
final JavaType parameterType = identifierField.getFieldType();
final List<JavaSymbolName> parameterNames = Arrays.asList(new JavaSymbolName(idFieldName));
final JavaType returnType = destination;
// Locate user-defined method
final MethodMetadata userMethod = getGovernorMethod(methodName, parameterType);
if (userMethod != null) {
Assert.isTrue(
userMethod.getReturnType().equals(returnType),
"Method '"
+ methodName
+ "' on '"
+ returnType
+ "' must return '"
+ returnType.getNameIncludingTypeParameters()
+ "'");
return userMethod;
}
// Create method
final List<AnnotationMetadataBuilder> annotations = new ArrayList<AnnotationMetadataBuilder>();
if (isGaeEnabled) {
addTransactionalAnnotation(annotations);
}
final InvocableMemberBodyBuilder bodyBuilder = new InvocableMemberBodyBuilder();
if (JavaType.STRING.equals(identifierField.getFieldType())) {
bodyBuilder.appendFormalLine(
"if (" + idFieldName + " == null || " + idFieldName + ".length() == 0) return null;");
} else if (!identifierField.getFieldType().isPrimitive()) {
bodyBuilder.appendFormalLine("if (" + idFieldName + " == null) return null;");
}
bodyBuilder.appendFormalLine(
"return "
+ ENTITY_MANAGER_METHOD_NAME
+ "().find("
+ returnType.getSimpleTypeName()
+ ".class, "
+ idFieldName
+ ");");
final MethodMetadataBuilder methodBuilder =
new MethodMetadataBuilder(
getId(),
Modifier.PUBLIC | Modifier.STATIC,
methodName,
returnType,
AnnotatedJavaType.convertFromJavaTypes(parameterType),
parameterNames,
bodyBuilder);
methodBuilder.setAnnotations(annotations);
return methodBuilder.build();
}
