| /* |
| * Copyright 2014 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; |
| |
| 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.core.ext.linker.EmittedArtifact.Visibility; |
| import com.google.gwt.dev.util.Util; |
| import com.google.gwt.thirdparty.guava.common.base.Charsets; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.io.PrintWriter; |
| |
| /** |
| * A Generator that creates a bar.txt resource and a class whose name depends on an input resource. |
| */ |
| public class FooResourceGenerator extends Generator { |
| |
| public static int runCount = 0; |
| |
| @Override |
| public String generate(TreeLogger logger, GeneratorContext context, String typeName) |
| throws UnableToCompleteException { |
| runCount++; |
| |
| // On first run generate a bar.txt resource that always has the same contents. |
| OutputStream barStream = context.tryCreateResource(logger, "bar.txt"); |
| if (barStream != null) { |
| try { |
| barStream.write("here's some text.".getBytes(Charsets.UTF_8)); |
| context.commitResource(logger, barStream).setVisibility(Visibility.Public); |
| } catch (IOException e) { |
| return null; |
| } |
| } |
| |
| // On first run generate a class whose name depends on the contents of a read input resource and |
| // another class whose name is stable but whose content changes based on the read input |
| // resource. |
| String generatedClassName; |
| try { |
| generatedClassName = Util.readStreamAsString(context.getResourcesOracle().getResource( |
| "com/foo/generatedClassName.txt").openContents()).trim(); |
| |
| // Custom class name with stable content. |
| PrintWriter customNameClassPw = context.tryCreate(logger, "com.foo", generatedClassName); |
| if (customNameClassPw != null) { |
| customNameClassPw.write("package com.foo;"); |
| customNameClassPw.write("public class " + generatedClassName + " {"); |
| customNameClassPw.write(" HasCustomContent hasCustomContent = new HasCustomContent();"); |
| customNameClassPw.write("}"); |
| |
| customNameClassPw.close(); |
| context.commit(logger, customNameClassPw); |
| } |
| |
| // Stable class name with custom content. |
| PrintWriter customContentClassPw = context.tryCreate(logger, "com.foo", "HasCustomContent"); |
| if (customContentClassPw != null) { |
| String generatedFunctionName = generatedClassName; |
| customContentClassPw.write("package com.foo;"); |
| customContentClassPw.write("public class HasCustomContent {"); |
| customContentClassPw.write(" public void " + generatedFunctionName + "() {}"); |
| customContentClassPw.write("}"); |
| |
| customContentClassPw.close(); |
| context.commit(logger, customContentClassPw); |
| } |
| |
| return "com.foo." + generatedClassName; |
| } catch (IOException e) { |
| return ""; |
| } |
| } |
| } |