| /* |
| * 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); |
| } |
| } |