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/*
Milyn - Copyright (C) 2006 - 2010
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License (version 2.1) as published by the Free Software
Foundation.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU Lesser General Public License for more details:
http://www.gnu.org/licenses/lgpl.txt
*/
package org.milyn.scribe.reflection;
import static org.milyn.util.ClassUtil.*;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.milyn.annotation.AnnotatedClass;
import org.milyn.annotation.AnnotatedMethod;
import org.milyn.annotation.AnnotationManager;
import org.milyn.assertion.AssertArgument;
import org.milyn.scribe.AnnotationNotFoundException;
import org.milyn.scribe.IllegalAnnotationUsageException;
import org.milyn.scribe.annotation.Dao;
import org.milyn.scribe.annotation.Delete;
import org.milyn.scribe.annotation.Flush;
import org.milyn.scribe.annotation.Insert;
import org.milyn.scribe.annotation.Lookup;
import org.milyn.scribe.annotation.LookupByQuery;
import org.milyn.scribe.annotation.ReturnsNoEntity;
import org.milyn.scribe.annotation.Update;
/**
* @author [email protected]
*
*/
public class AnnotatedDaoRuntimeInfo {
private final Class daoClass;
private EntityMethod defaultInsertMethod;
private EntityMethod defaultUpdateMethod;
private FlushMethod flushMethod;
private EntityMethod defaultDeleteMethod;
private LookupWithNamedQueryMethod lookupWithNamedQueryMethod;
private LookupWithPositionalQueryMethod lookupWithPositionalQueryMethod;
private final Map insertMethods = new HashMap();
private final Map updateMethods = new HashMap();
private final Map deleteMethods = new HashMap();
private final Map lookupWithNamedParameters = new HashMap();
/**
*
* @param daoClass
*/
AnnotatedDaoRuntimeInfo(final Class daoClass) {
AssertArgument.isNotNull(daoClass, "daoClass");
this.daoClass = daoClass;
analyze();
}
/**
* @return the daoClass
*/
public Class getDaoClass() {
return daoClass;
}
/**
* @return the defaultInsertMethod
*/
public EntityMethod getDefaultInsertMethod() {
return defaultInsertMethod;
}
/**
*
* @param name
* @return
*/
public EntityMethod getInsertMethod(String name) {
return insertMethods.get(name);
}
/**
* @return the defaultUpdateMethod
*/
public EntityMethod getDefaultUpdateMethod() {
return defaultUpdateMethod;
}
/**
*
* @param name
* @return
*/
public EntityMethod getUpdateMethod(String name) {
return updateMethods.get(name);
}
/**
* @return the defaultFlushMethod
*/
public FlushMethod getFlushMethod() {
return flushMethod;
}
/**
* @return the defaultFlushMethod
*/
public EntityMethod getDefaultDeleteMethod() {
return defaultDeleteMethod;
}
/**
*
* @param name
* @return
*/
public EntityMethod getDeleteMethod(String name) {
return deleteMethods.get(name);
}
public LookupWithNamedQueryMethod getLookupByNamedQueryMethod() {
return lookupWithNamedQueryMethod;
}
public LookupWithPositionalQueryMethod getLookupByPositionalQueryMethod() {
return lookupWithPositionalQueryMethod;
}
public LookupMethod getLookupWithNamedParametersMethod(final String name) {
return lookupWithNamedParameters.get(name);
}
/**
*
*/
private void analyze() {
AnnotatedClass annotatedClass = AnnotationManager.getAnnotatedClass(daoClass);
if(annotatedClass.getAnnotation(Dao.class) == null) {
throw new AnnotationNotFoundException("The class '"+ daoClass.getName() +"' isn't annotated with the '"+ Dao.class.getName() +"' annotation. Only class annotated with that annotation can be used as annotated DAO.");
}
AnnotatedMethod[] annotatedMethods = annotatedClass.getAnnotatedMethods();
for(final AnnotatedMethod method : annotatedMethods) {
if(method.getAllAnnotations().length > 0) {
if(method.isAnnotationPresent(Insert.class)) {
analyzeInsertMethod(method);
} else if(method.isAnnotationPresent(Update.class)) {
analyzeUpdateMethod(method);
} else if(method.isAnnotationPresent(Delete.class)) {
analyzeDeleteMethod(method);
} else if(method.isAnnotationPresent(Flush.class)) {
analyzeFlushMethod(method);
} else if(method.isAnnotationPresent(Lookup.class)) {
analyzeFindByMethod(method);
} else if(method.isAnnotationPresent(LookupByQuery.class)) {
analyzeFindByQueryMethod(method);
}
}
}
if(defaultInsertMethod == null && insertMethods.size() == 1) {
defaultInsertMethod = insertMethods.values().iterator().next();
}
if(defaultUpdateMethod == null && updateMethods.size() == 1) {
defaultUpdateMethod = updateMethods.values().iterator().next();
}
if(defaultDeleteMethod == null && deleteMethods.size() == 1) {
defaultDeleteMethod = deleteMethods.values().iterator().next();
}
}
/**
* @param method
*/
private void analyzeFlushMethod(final AnnotatedMethod aMethod) {
Method method = aMethod.getMethod();
if(flushMethod != null) {
throw new IllegalAnnotationUsageException("At least two methods are annotated with the '"+ Flush.class.getName() +"'. Only one method per class is allowed to be the flush method.");
}
if(method.getParameterTypes().length > 0) {
throw new IllegalAnnotationUsageException("The Flush annotated method '"+ method +"' of the DAO class '"+ daoClass.getName() +"' has parameters, which isn't allowed.");
}
flushMethod = new FlushMethod(method);
}
/**
* @param method
*/
private void analyzeUpdateMethod(final AnnotatedMethod aMethod) {
Method method = aMethod.getMethod();
Update annotation = aMethod.getAnnotation(Update.class);
String name = annotation.name();
if(name.length() == 0) {
name = method.getName();
}
assertUniqueName(updateMethods, Update.class, name);
if(annotation.isDefault() && defaultUpdateMethod != null) {
throw new IllegalAnnotationUsageException("At least two methods are annotated with the '"+ Update.class.getName() +"' having the isDefault on true. Only one method per class is allowed to be the default update method.");
}
if(method.getParameterTypes().length == 0) {
throw new IllegalAnnotationUsageException("The Update annotated method '"+ method +"' of the DAO class '"+ daoClass.getName() +"' doesn't have any parameters.");
}
if(method.getParameterTypes().length > 1) {
throw new IllegalAnnotationUsageException("The Update annotated method '"+ method +"' of the DAO class '"+ daoClass.getName() +"' has more then 1 parameter, which isn't allowed.");
}
boolean returnsEntity = !method.isAnnotationPresent(ReturnsNoEntity.class);
EntityMethod updateMethod = new EntityMethod(method, returnsEntity);
if(annotation.isDefault()) {
defaultUpdateMethod = updateMethod;
}
updateMethods.put(name, updateMethod);
}
/**
* @param method
*/
private void analyzeInsertMethod(final AnnotatedMethod aMethod) {
Method method = aMethod.getMethod();
Insert annotation = aMethod.getAnnotation(Insert.class);
String name = annotation.name();
if(name.length() == 0) {
name = method.getName();
}
assertUniqueName(insertMethods, Insert.class, name);
if(annotation.isDefault() && defaultInsertMethod != null) {
throw new IllegalAnnotationUsageException("At least two methods are annotated with the '"+ Insert.class.getName() +"'annotation having the isDefault on true. Only one method per class is allowed to be the default insert method.");
}
if(method.getParameterTypes().length == 0) {
throw new IllegalAnnotationUsageException("The Insert annotated method '"+ method +"' of the DAO class '"+ daoClass.getName() +"' doesn't have any parameters.");
}
if(method.getParameterTypes().length > 1) {
throw new IllegalAnnotationUsageException("The Insert annotated method '"+ method +"' of the DAO class '"+ daoClass.getName() +"' has more then 1 parameter, which isn't allowed.");
}
boolean returnsEntity = !method.isAnnotationPresent(ReturnsNoEntity.class);
EntityMethod insertMethod = new EntityMethod(method, returnsEntity);
if(annotation.isDefault()) {
defaultInsertMethod = insertMethod;
}
insertMethods.put(name, insertMethod);
}
/**
* @param method
*/
private void analyzeDeleteMethod(final AnnotatedMethod aMethod) {
Method method = aMethod.getMethod();
Delete annotation = aMethod.getAnnotation(Delete.class);
String name = annotation.name();
if(name.length() == 0) {
name = method.getName();
}
assertUniqueName(deleteMethods, Delete.class, name);
if(annotation.isDefault() && defaultDeleteMethod != null) {
throw new IllegalAnnotationUsageException("At least two methods are annotated with the '"+ Delete.class.getName() +"' annotation having the isDefault on true. Only one method per class is allowed to be the default delete method.");
}
if(method.getParameterTypes().length == 0) {
throw new IllegalAnnotationUsageException("The Delete annotated method '"+ method +"' of the DAO class '"+ daoClass.getName() +"' doesn't have a parameter, which it needs.");
}
if(method.getParameterTypes().length > 1) {
throw new IllegalAnnotationUsageException("The Delete annotated method '"+ method +"' the DAO class '"+ daoClass.getName() +"' has more then 1 parameter, which isn't allowed.");
}
boolean returnsEntity = !method.isAnnotationPresent(ReturnsNoEntity.class);
EntityMethod deleteMethod = new EntityMethod(method, returnsEntity);
if(annotation.isDefault()) {
defaultDeleteMethod = deleteMethod;
}
deleteMethods.put(name, deleteMethod);
}
/**
*
* @param method
*/
private void analyzeFindByQueryMethod(final AnnotatedMethod aMethod) {
Method method = aMethod.getMethod();
Class[] parameters = method.getParameterTypes();
if(method.getParameterTypes().length != 2) {
throw new IllegalAnnotationUsageException("The FindByQuery annotated method '"+ method +"' of the DAO class '"+ daoClass.getName() +"' " +
"doesn't have exactly two parameters.");
}
if(!Collection.class.isAssignableFrom(method.getReturnType())) {
throw new IllegalAnnotationUsageException("The FindByQuery annotated method '"+ method +"' of the DAO class '"+ daoClass.getName() +"' " +
"doesn't return an instance of Collection.");
}
int queryIndex = indexOffFirstAssignableClass(String.class, parameters);
if(queryIndex == -1) {
throw new IllegalAnnotationUsageException("The FindByQuery annotated method '"+ method +"' of the DAO class '"+ daoClass.getName() +"' " +
"doesn't have a String parameter. This parameter is needed to receive the query string.");
}
int parameterIndex = (queryIndex == 0) ? 1 : 0;
if(containsAssignableClass(List.class, parameters) || containsAssignableClass(Object[].class, parameters)) {
if(lookupWithPositionalQueryMethod != null) {
throw new IllegalAnnotationUsageException("A second method annotated with the '"+ LookupByQuery.class.getName() +"' annotation is found for a Positional query. " +
"Only one method, with a List or Object array parameter, per class is allowed to be annotated with this annotation.");
}
lookupWithPositionalQueryMethod = new LookupWithPositionalQueryMethod(method, queryIndex, parameterIndex);
} else if(containsAssignableClass(Map.class, parameters)){
if(lookupWithNamedQueryMethod != null) {
throw new IllegalAnnotationUsageException("A second method annotated with the '"+ LookupByQuery.class.getName() +"' annotation is found for a Positional query. " +
"Only one method, with a Map parameter, per class is allowed to be annotated with this annotation.");
}
lookupWithNamedQueryMethod = new LookupWithNamedQueryMethod(method, queryIndex, parameterIndex);
} else {
throw new IllegalAnnotationUsageException("The FindByQuery annotated method '"+ method +"' of the DAO class '"+ daoClass.getName() +"' " +
"doesn't have a List, Object array or Map parameter. This parameter is needed to receive the query parameters.");
}
}
/**
* @param method
*/
private void analyzeFindByMethod(final AnnotatedMethod aMethod) {
Method method = aMethod.getMethod();
Lookup findByAnnotation = aMethod.getAnnotation(Lookup.class);
String name = findByAnnotation.name();
if(name.trim().length() == 0) {
name = method.getName();
}
assertUniqueName(lookupWithNamedParameters, Lookup.class, name);
if(void.class.equals(method.getReturnType())){
throw new IllegalAnnotationUsageException("The FindBy annotated method '"+ method +"' of the DAO class '"+ daoClass.getName() +"' " +
"returns void, which isn't allowed. The method must return something.");
}
lookupWithNamedParameters.put(name, new LookupMethod(method));
}
/**
* @param name
*/
private void assertUniqueName(Map methods, Class annotation, String name) {
if(methods.containsKey(name)) {
throw new IllegalAnnotationUsageException("A second method annotated with the '"+ annotation.getName() +"' annotation and the name '"+ name +"' is found." +
"If you have defined a name on the annotation then please define a different one. If you haven't defined a name then please define one that is unique.");
}
}
}
