com.google.gwt.dev.cfg.EntryMethodHolderGenerator Maven / Gradle / Ivy
/*
* Copyright 2013 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.dev.cfg;
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.thirdparty.guava.common.annotations.VisibleForTesting;
import java.io.PrintWriter;
/**
* Generator used to generate a class unique to the current module to hold the boot strap entry
* method that the compiler generates. The contents of the function will be filled in with calls to
* registered entry points.
*/
public class EntryMethodHolderGenerator extends Generator {
private static final String ENTRY_METHOD_HOLDER_SUFFIX = "EntryMethodHolder";
private static final String PACKAGE_PATH = "com.google.gwt.lang";
@Override
public String generate(TreeLogger logger, GeneratorContext context, String moduleCanonicalName)
throws UnableToCompleteException {
// Module names aren't subject to Java class name restrictions, so must be escaped. Also name
// based on module canonical name, to avoid collisions resulting from multiple modules
// with the same rename.
String typeName =
getEntryMethodHolderTypeName(moduleCanonicalName);
PrintWriter out = context.tryCreate(logger, PACKAGE_PATH, typeName);
if (out != null) {
out.println("package " + PACKAGE_PATH + ";");
out.println("public class " + typeName + " {");
out.println(" public static final void init() {");
out.println(" // to be synthesized later");
out.println(" }");
out.println("}");
context.commit(logger, out);
} else {
// Must have been a cache hit.
}
return PACKAGE_PATH + "." + typeName;
}
@VisibleForTesting
public static String getEntryMethodHolderTypeName(String moduleCanonicalName) {
return Generator.escapeClassName(moduleCanonicalName + "_" + ENTRY_METHOD_HOLDER_SUFFIX);
}
}