package act.controller.bytecode;
/*-
* #%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.asm.ClassVisitor;
import act.asm.MethodVisitor;
import act.asm.Type;
import act.controller.meta.ControllerClassMetaInfo;
import act.controller.meta.ControllerClassMetaInfoHolder;
import act.controller.meta.HandlerMethodMetaInfo;
import act.util.AppByteCodeEnhancer;
import org.osgl.$;
/**
* Enhance controllers (classes with either request handler method or
* interceptor methods)
*/
public class ControllerEnhancer extends AppByteCodeEnhancer<ControllerEnhancer> {
private ControllerClassMetaInfoHolder classInfoHolder;
private String className;
public ControllerEnhancer() {
super(null);
}
public ControllerEnhancer(ClassVisitor cv, ControllerClassMetaInfoHolder infoHolder) {
super(_F.isController(infoHolder), cv);
this.classInfoHolder = infoHolder;
}
@Override
public AppByteCodeEnhancer app(App app) {
this.classInfoHolder = app.classLoader();
return super.app(app);
}
@Override
protected Class<ControllerEnhancer> subClass() {
return ControllerEnhancer.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);
className = Type.getObjectType(name).getClassName();
}
@Override
public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) {
MethodVisitor mv = super.visitMethod(access, name, desc, signature, exceptions);
HandlerMethodMetaInfo info = methodInfo(name);
if (null == info) {
return mv;
}
logger.debug(">>>About to enhance handler: %s", name);
return new HandlerEnhancer(mv, info, access, name, desc, signature, exceptions);
}
private HandlerMethodMetaInfo methodInfo(String name) {
if (!isConstructor(name)) {
ControllerClassMetaInfo ccInfo = classInfoHolder.controllerClassMetaInfo(className);
if (null == ccInfo) {
return null;
}
return ccInfo.handler(name);
} else {
return null;
}
}
private enum _F {
;
private static final $.Predicate<String> isController(final ControllerClassMetaInfoHolder infoSrc) {
return new $.Predicate<String>() {
@Override
public boolean test(String s) {
return infoSrc.controllerClassMetaInfo(s) != null;
}
};
}
}
}