/*
* Copyright 2011 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.enterprise.rebind;
import java.util.HashSet;
import java.util.Set;
import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.event.Observes;
import javax.enterprise.inject.Produces;
import org.jboss.errai.codegen.BlockStatement;
import org.jboss.errai.codegen.Modifier;
import org.jboss.errai.codegen.Statement;
import org.jboss.errai.codegen.builder.MethodCommentBuilder;
import org.jboss.errai.codegen.meta.MetaClass;
import org.jboss.errai.codegen.meta.MetaParameter;
import org.jboss.errai.codegen.util.Stmt;
import org.jboss.errai.config.util.ClassScanner;
import org.jboss.errai.enterprise.client.cdi.CDIEventTypeLookup;
import org.jboss.errai.enterprise.client.cdi.api.CDI;
import org.jboss.errai.ioc.client.api.IOCExtension;
import org.jboss.errai.ioc.rebind.ioc.bootstrapper.IOCConfigProcessor;
import org.jboss.errai.ioc.rebind.ioc.bootstrapper.IOCProcessingContext;
import org.jboss.errai.ioc.rebind.ioc.extension.IOCExtensionConfigurator;
import org.jboss.errai.ioc.rebind.ioc.injector.api.InjectionContext;
import org.jboss.errai.ioc.rebind.ioc.injector.api.WiringElementType;
@IOCExtension
public class JSR299IOCExtensionConfigurator implements IOCExtensionConfigurator {
@Override
public void configure(final IOCProcessingContext context, final InjectionContext injectionContext,
final IOCConfigProcessor procFactory) {
injectionContext.mapElementType(WiringElementType.SingletonBean, ApplicationScoped.class);
injectionContext.mapElementType(WiringElementType.ProducerElement, Produces.class);
}
private static void addTypeHierarchyFor(final IOCProcessingContext context, final Set<MetaClass> classes) {
final BlockStatement instanceInitializer = context.getBootstrapClass().getInstanceInitializer();
int i = 0, addLookupMethodCount = 0;
MethodCommentBuilder<?> currentBlock = null;
for (final MetaClass subClass : classes) {
MetaClass cls = subClass;
do {
// We'll generate a separate lookup method for every 500 lines to make sure we're not
// exceeding the method size byte limit. See ERRAI-346 and ERRAI-679
if ((i++ % 500) == 0) {
Statement lookupMethod = Stmt.invokeStatic(context.getBootstrapClass(), "addLookups_" + addLookupMethodCount);
if (currentBlock != null) {
currentBlock
.append(lookupMethod);
currentBlock.modifiers(Modifier.Static).finish();
}
else {
instanceInitializer.addStatement(lookupMethod);
}
currentBlock =
context.getBootstrapBuilder().privateMethod(void.class, "addLookups_" + addLookupMethodCount++);
}
if (cls != subClass) {
currentBlock.append(Stmt.invokeStatic(CDIEventTypeLookup.class, "get")
.invoke("addLookup", subClass.getFullyQualifiedName(), cls.getFullyQualifiedName()));
}
for (final MetaClass interfaceClass : cls.getInterfaces()) {
currentBlock.append(Stmt.invokeStatic(CDIEventTypeLookup.class, "get")
.invoke("addLookup", subClass.getFullyQualifiedName(), interfaceClass.getFullyQualifiedName()));
}
}
while ((cls = cls.getSuperClass()) != null);
}
if (currentBlock != null) {
currentBlock.modifiers(Modifier.Static).finish();
}
}
@Override
public void afterInitialization(final IOCProcessingContext context, final InjectionContext injectionContext,
final IOCConfigProcessor procFactory) {
final BlockStatement instanceInitializer = context.getBootstrapClass().getInstanceInitializer();
final Set<MetaClass> knownObserverTypes = new HashSet<MetaClass>();
for (final MetaParameter parameter : ClassScanner.getParametersAnnotatedWith(Observes.class,
context.getGeneratorContext())) {
knownObserverTypes.add(parameter.getType());
}
final Set<MetaClass> knownTypesWithSuperTypes = new HashSet<MetaClass>(knownObserverTypes);
for (final MetaClass cls : knownObserverTypes) {
for (final MetaClass subClass : ClassScanner.getSubTypesOf(cls, context.getGeneratorContext())) {
knownTypesWithSuperTypes.add(subClass);
}
}
addTypeHierarchyFor(context, knownTypesWithSuperTypes);
instanceInitializer.addStatement(Stmt.nestedCall(Stmt.newObject(CDI.class))
.invoke("initLookupTable", Stmt.invokeStatic(CDIEventTypeLookup.class, "get")));
}
}