com.google.gwt.i18n.rebind.MessagesImplCreator Maven / Gradle / Ivy
/*
* Copyright 2008 Google 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.google.gwt.i18n.rebind;
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.JMethod;
import com.google.gwt.core.ext.typeinfo.NotFoundException;
import com.google.gwt.core.ext.typeinfo.TypeOracle;
import com.google.gwt.i18n.rebind.AbstractResource.ResourceList;
import com.google.gwt.i18n.shared.GwtLocale;
import com.google.gwt.safehtml.shared.SafeHtml;
import com.google.gwt.user.rebind.SourceWriter;
/**
* Creates the class implementation for a given resource bundle using the
* standard AbstractGeneratorClassCreator.
*/
class MessagesImplCreator extends AbstractLocalizableImplCreator {
/**
* Constructor for MessagesImplCreator.
*
* @param writer Writer to print to
* @param localizableClass Class/Interface to conform to
* @param resourceList resource bundle used to generate the class
* @param oracle types
* @param logger logger to print errors
* @throws UnableToCompleteException
*/
public MessagesImplCreator(TreeLogger logger, SourceWriter writer,
JClassType localizableClass, ResourceList resourceList, TypeOracle oracle)
throws UnableToCompleteException {
super(logger, writer, localizableClass, resourceList, false);
try {
MessagesMethodCreator creator = new MessagesMethodCreator(this, writer);
JClassType stringClass = oracle.getType(String.class.getName());
register(stringClass, creator);
JClassType safeHtmlClass = oracle.getType(SafeHtml.class.getName());
register(safeHtmlClass, creator);
} catch (NotFoundException e) {
// never expect this error in practice
throw error(logger, e);
}
}
/**
* Checks that the method has the right structure to implement
* Messages.
*
* @param method
* @throws UnableToCompleteException
*/
private void checkMessagesMethod(TreeLogger logger, JMethod method)
throws UnableToCompleteException {
if (!method.getReturnType().getQualifiedSourceName().equals(
"java.lang.String") &&
!method.getReturnType().getQualifiedSourceName().equals(
MessagesMethodCreator.SAFE_HTML_FQCN)
) {
throw error(logger,
"All methods in interfaces extending Messages must have a return type "
+ "of String or " + MessagesMethodCreator.SAFE_HTML_FQCN + ".");
}
}
/**
* Create the method body associated with the given method. Arguments are
* arg0...argN.
*
* @param m method to emit
* @throws UnableToCompleteException
*/
@Override
protected void emitMethodBody(TreeLogger logger, JMethod m, GwtLocale locale)
throws UnableToCompleteException {
checkMessagesMethod(logger, m);
delegateToCreator(logger, m, locale);
}
}