/**
* Copyright 2013 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.util.HashMap;
import java.util.Map;
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.TreeLogger.Type;
import com.google.gwt.core.ext.UnableToCompleteException;
import com.google.gwt.core.ext.typeinfo.JClassType;
import com.google.gwt.user.client.rpc.InvocationException;
import com.google.inject.Guice;
import com.google.inject.Injector;
import com.gwtplatform.mvp.client.annotations.NameToken;
import com.gwtplatform.mvp.client.proxy.PlaceTokenRegistry;
import com.gwtplatform.mvp.rebind.velocity.Logger;
import com.gwtplatform.mvp.rebind.velocity.RebindModule;
import com.gwtplatform.mvp.rebind.velocity.proxy.VelocityPlacetokenGenerator;
/**
* Generates an implementation of {@link PlaceTokenRegistry} based on GWTP's {@link NameToken} annotation.
*/
public class PlaceTokenRegistryGenerator extends Generator {
@Override
public String generate(final TreeLogger treeLogger, GeneratorContext generatorContext, String requestedClass)
throws UnableToCompleteException {
Map<String, JClassType> placeTokens = findPlaceTokens(generatorContext);
checkPlaces(placeTokens);
Injector injector = Guice.createInjector(new RebindModule(new Logger(treeLogger), generatorContext));
VelocityPlacetokenGenerator.Factory factory = injector.getInstance(VelocityPlacetokenGenerator.Factory.class);
VelocityPlacetokenGenerator generator = factory.create(placeTokens.keySet());
try {
return generator.generate();
} catch (Exception e) {
treeLogger.log(Type.ERROR, e.getMessage(), e);
throw new UnableToCompleteException();
}
}
/**
* Finds all place tokens.
*/
private static Map<String, JClassType> findPlaceTokens(final GeneratorContext generatorContext) {
Map<String, JClassType> placeTokens = new HashMap<String, JClassType>();
for (JClassType type : generatorContext.getTypeOracle().getTypes()) {
NameToken nameTokenAnnotation = type.getAnnotation(NameToken.class);
if (nameTokenAnnotation != null) {
placeTokens.put(nameTokenAnnotation.value(), type);
}
}
return placeTokens;
}
/**
* Checks if the given place tokens are valid.
*/
private static void checkPlaces(final Map<String, JClassType> placeTokens) {
for (Map.Entry<String, JClassType> entry : placeTokens.entrySet()) {
if (!entry.getKey().startsWith("/")) {
throw new InvocationException("The token '" + entry.getKey() + "' of '"
+ entry.getValue().getQualifiedSourceName() + "' should start with a '/'!");
}
}
}
}