package act.db;
/*-
* #%L
* ACT Framework
* %%
* Copyright (C) 2014 - 2017 ActFramework
* %%
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* #L%
*/
import act.app.App;
import act.app.DbServiceManager;
import act.asm.AnnotationVisitor;
import act.asm.MethodVisitor;
import act.asm.Type;
import act.util.AppByteCodeEnhancer;
import org.osgl.util.S;
/**
* Add {@code public static Dao dao()} method to the entity model class
*/
public class EntityClassEnhancer extends AppByteCodeEnhancer<EntityClassEnhancer> {
private String classDesc;
private boolean daoMethodFound;
private boolean daoClsMethodFound;
private boolean isEntityClass;
private DbServiceManager dbm;
public EntityClassEnhancer() {
super(S.F.startsWith("act.").negate());
}
@Override
protected Class<EntityClassEnhancer> subClass() {
return EntityClassEnhancer.class;
}
@Override
public void visit(int version, int access, String name, String signature, String superName, String[] interfaces) {
super.visit(version, access, name, signature, superName, interfaces);
classDesc = "L" + name + ";";
}
@Override
public AnnotationVisitor visitAnnotation(String desc, boolean visible) {
Type type = Type.getType(desc);
for (DbService dbService : dbm().registeredServices()) {
if (type.equals(Type.getType(dbService.entityAnnotationType()))) {
isEntityClass = true;
}
}
return super.visitAnnotation(desc, visible);
}
@Override
public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) {
if (isEntityClass) {
if ("dao".equals(name)) {
if ("()Lact/db/Dao;".equals(desc)) {
daoMethodFound = true;
logger.warn("dao() method already defined in the model class");
}
if ("(Ljava/lang/Class;)Lact/db/Dao;".equals(desc)) {
daoClsMethodFound = true;
logger.warn("dao(Class) method already defined in the model class");
}
}
}
return super.visitMethod(access, name, desc, signature, exceptions);
}
@Override
public void visitEnd() {
if (isEntityClass) {
if (!daoMethodFound) {
// add Model.dao() method
MethodVisitor mv = super.visitMethod(ACC_PUBLIC + ACC_STATIC,
"dao", "()Lact/db/Dao;",
"<ID_TYPE:Ljava/lang/Object;MODEL_TYPE:Lact/db/ModelBase<TID_TYPE;TMODEL_TYPE;>;QUERY_TYPE::Lact/db/Dao$Query<TMODEL_TYPE;TQUERY_TYPE;>;DAO_TYPE::Lact/db/Dao<TID_TYPE;TMODEL_TYPE;TQUERY_TYPE;TDAO_TYPE;>;>()TDAO_TYPE;", null);
mv.visitCode();
mv.visitMethodInsn(INVOKESTATIC, "act/app/App", "instance", "()Lact/app/App;", false);
mv.visitMethodInsn(INVOKEVIRTUAL, "act/app/App", "dbServiceManager", "()Lact/app/DbServiceManager;", false);
mv.visitLdcInsn(Type.getType(classDesc));
mv.visitMethodInsn(INVOKEVIRTUAL, "act/app/DbServiceManager", "dao", "(Ljava/lang/Class;)Lact/db/Dao;", false);
mv.visitInsn(ARETURN);
mv.visitMaxs(2, 0);
mv.visitEnd();
}
if (!daoClsMethodFound) {
// add Model.dao(Class c) method
MethodVisitor mv = super.visitMethod(ACC_PUBLIC + ACC_STATIC, "dao", "(Ljava/lang/Class;)Lact/db/Dao;", "<T::Lact/db/Dao;>(Ljava/lang/Class<TT;>;)TT;", null);
mv.visitCode();
mv.visitMethodInsn(INVOKESTATIC, "act/app/App", "instance", "()Lact/app/App;", false);
mv.visitMethodInsn(INVOKEVIRTUAL, "act/app/App", "dbServiceManager", "()Lact/app/DbServiceManager;", false);
mv.visitLdcInsn(Type.getType(classDesc));
mv.visitMethodInsn(INVOKEVIRTUAL, "act/app/DbServiceManager", "dao", "(Ljava/lang/Class;)Lact/db/Dao;", false);
mv.visitInsn(ARETURN);
mv.visitMaxs(1, 1);
mv.visitEnd();
}
}
super.visitEnd();
}
private synchronized DbServiceManager dbm() {
if (null == dbm) {
dbm = App.instance().dbServiceManager();
}
return dbm;
}
}