com.google.gwt.i18n.rebind.CachedGeneratorContext Maven / Gradle / Ivy
/*
* Copyright 2009 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.DelegatingGeneratorContext;
import com.google.gwt.core.ext.GeneratorContext;
import com.google.gwt.core.ext.TreeLogger;
import com.google.gwt.core.ext.UnableToCompleteException;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.util.HashSet;
import java.util.Set;
/**
* Keeps track of types/resources previously created to avoid warnings about
* trying to generate the same file multiple times during a single generator
* run. This is needed when one generator calls other generators multiple times
* (such as for runtime locale support).
*/
class CachedGeneratorContext extends DelegatingGeneratorContext {
private final GeneratorContext context;
private Set generatedResources = new HashSet();
private Set generatedTypes = new HashSet();
CachedGeneratorContext(GeneratorContext context) {
super(context);
this.context = context;
}
/**
* Provide the canonical context represented by this context.
*
* @return the GeneratorContext backing this implementation.
*/
public GeneratorContext getWrappedGeneratorContext() {
return context;
}
@Override
public PrintWriter tryCreate(TreeLogger logger, String packageName, String simpleName) {
String typeName = packageName + '.' + simpleName;
if (generatedTypes.contains(typeName)) {
return null;
}
generatedTypes.add(typeName);
return context.tryCreate(logger, packageName, simpleName);
}
@Override
public OutputStream tryCreateResource(TreeLogger logger, String partialPath)
throws UnableToCompleteException {
if (generatedResources.contains(partialPath)) {
return null;
}
generatedResources.add(partialPath);
return context.tryCreateResource(logger, partialPath);
}
}