/*
* Copyright 2012 JBoss, by Red Hat, Inc
*
* 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.
*/
package org.jboss.errai.ioc.rebind.ioc.builtin;
import com.google.gwt.user.client.Timer;
import org.jboss.errai.codegen.ArithmeticOperator;
import org.jboss.errai.codegen.Parameter;
import org.jboss.errai.codegen.Statement;
import org.jboss.errai.codegen.builder.impl.ObjectBuilder;
import org.jboss.errai.codegen.meta.MetaClass;
import org.jboss.errai.codegen.meta.MetaClassFactory;
import org.jboss.errai.codegen.util.Arith;
import org.jboss.errai.codegen.util.Refs;
import org.jboss.errai.codegen.util.Stmt;
import org.jboss.errai.ioc.client.api.CodeDecorator;
import org.jboss.errai.ioc.client.api.Timed;
import org.jboss.errai.ioc.client.container.DestructionCallback;
import org.jboss.errai.ioc.client.container.InitializationCallback;
import org.jboss.errai.ioc.rebind.ioc.extension.IOCDecoratorExtension;
import org.jboss.errai.ioc.rebind.ioc.injector.InjectUtil;
import org.jboss.errai.ioc.rebind.ioc.injector.api.InjectableInstance;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
/**
* @author Mike Brock
*/
@CodeDecorator
public class TimedExtension extends IOCDecoratorExtension<Timed> {
public TimedExtension(Class<Timed> decoratesWith) {
super(decoratesWith);
}
@Override
public List<? extends Statement> generateDecorator(InjectableInstance<Timed> ctx) {
try {
final MetaClass beanClass = ctx.getEnclosingType();
final Timed timed = ctx.getAnnotation();
final Statement methodInvokation
= InjectUtil.invokePublicOrPrivateMethod(ctx.getInjectionContext(), Refs.get("beanInstance"),
ctx.getMethod());
final org.jboss.errai.common.client.util.TimeUnit timeUnit = timed.timeUnit();
final int interval = timed.interval();
final Statement timerDecl
= Stmt.nestedCall(Stmt.newObject(Timer.class).extend()
.publicOverridesMethod("run")
.append(methodInvokation)
.finish().finish());
final String timerVarName = InjectUtil.getUniqueVarName();
final Statement timerVar = Stmt.declareFinalVariable(timerVarName, Timer.class, timerDecl);
final List<Statement> statements = new ArrayList<Statement>();
// statements.add(timerVar);
final Statement timerExec;
switch (timed.type()) {
case REPEATING:
timerExec = Stmt.loadVariable(timerVarName).invoke("scheduleRepeating", timeUnit.toMillis(interval));
break;
default:
case DELAYED:
timerExec = Stmt.loadVariable(timerVarName).invoke("schedule",
Arith.expr(
Stmt.invokeStatic(System.class, "currentTimeMillis"),
ArithmeticOperator.Addition,
timeUnit.toMillis(interval))
);
break;
}
final Statement destructionCallbackStmt
= InjectUtil.createDestructionCallback(beanClass, "beanInstance",
Collections.<Statement>singletonList(Stmt.loadVariable(timerVarName).invoke("cancel")));
final Statement initCallbackStmt = InjectUtil.createInitializationCallback(beanClass, "beanInstance",
Arrays.asList(timerVar,
Stmt.loadVariable("context").invoke("addDestructionCallback",
Refs.get(ctx.getInjector().getInstanceVarName()), destructionCallbackStmt),
timerExec));
statements.add(Stmt.loadVariable("context").invoke("addInitializationCallback",
Refs.get(ctx.getInjector().getInstanceVarName()), initCallbackStmt));
return statements;
}
catch (Exception e) {
throw new RuntimeException(e);
}
}
}