/**
* Copyright 2011 ArcBees 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 com.gwtplatform.mvp.rebind;
import java.io.PrintWriter;
import com.google.gwt.core.ext.Generator;
import com.google.gwt.core.ext.GeneratorContext;
import com.google.gwt.core.ext.TreeLogger;
import com.google.gwt.core.ext.UnableToCompleteException;
import com.google.gwt.core.ext.typeinfo.JClassType;
import com.google.gwt.core.ext.typeinfo.JPackage;
import com.google.gwt.core.ext.typeinfo.TypeOracle;
import com.google.gwt.user.rebind.ClassSourceFileComposerFactory;
import com.google.gwt.user.rebind.SourceWriter;
/**
* @author Philippe Beaudoin
* @author Olivier Monaco
*/
public class ProxyGenerator extends Generator {
private ClassCollection classCollection;
private GinjectorInspector ginjectorInspector;
private PresenterInspector presenterInspector;
private ProxyOutputterFactory proxyOutputterFactory;
@Override
public String generate(TreeLogger logger, GeneratorContext ctx,
String requestedClass) throws UnableToCompleteException {
// Initialize dependencies
TypeOracle oracle = ctx.getTypeOracle();
classCollection = new ClassCollection(oracle);
ginjectorInspector = new GinjectorInspector(classCollection, ctx, logger);
presenterInspector = new PresenterInspector(oracle, logger, classCollection,
ginjectorInspector);
proxyOutputterFactory = new ProxyOutputterFactory(oracle, logger, classCollection,
ginjectorInspector, presenterInspector);
// Find the requested class
JClassType proxyInterface = oracle.findType(requestedClass);
if (proxyInterface == null) {
logger.log(TreeLogger.ERROR, "Unable to find metadata for type '"
+ requestedClass + "'", null);
throw new UnableToCompleteException();
}
// If it's not an interface it's a custom user-made proxy class. Don't use generator.
if (proxyInterface.isInterface() == null) {
return null;
}
ginjectorInspector.init();
if (!presenterInspector.init(proxyInterface)) {
return null;
}
// Find the package, build the generated class name.
JPackage interfacePackage = proxyInterface.getPackage();
String packageName = interfacePackage == null ? "" : interfacePackage.getName();
String implClassName = presenterInspector.getPresenterClassName()
+ proxyInterface.getSimpleSourceName() + "Impl";
String generatedClassName = packageName + "." + implClassName;
// Create the printWriter
PrintWriter printWriter = ctx.tryCreate(logger, packageName, implClassName);
if (printWriter == null) {
// We've already created it, so nothing to do
return generatedClassName;
}
ProxyOutputter proxyOutputter = proxyOutputterFactory.create(proxyInterface);
// Start composing the class
ClassSourceFileComposerFactory composerFactory = new ClassSourceFileComposerFactory(
packageName, implClassName);
proxyOutputter.initComposerFactory(composerFactory);
// Get a source writer
SourceWriter writer = composerFactory.createSourceWriter(ctx, printWriter);
proxyOutputter.writeFields(writer);
proxyOutputter.writeInnerClasses(writer);
proxyOutputter.writeConstructor(writer, implClassName, true);
proxyOutputter.writeMethods(writer);
writer.commit(logger);
return generatedClassName;
}
}