| /* |
| * 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.dev.cfg; |
| |
| import com.google.gwt.core.ext.Generator; |
| import com.google.gwt.core.ext.Generator.RunsLocal; |
| import com.google.gwt.core.ext.RebindResult; |
| import com.google.gwt.core.ext.TreeLogger; |
| import com.google.gwt.core.ext.UnableToCompleteException; |
| import com.google.gwt.dev.javac.StandardGeneratorContext; |
| import com.google.gwt.dev.jjs.InternalCompilerException; |
| import com.google.gwt.thirdparty.guava.common.annotations.VisibleForTesting; |
| import com.google.gwt.thirdparty.guava.common.collect.ImmutableSet; |
| |
| import java.util.Set; |
| |
| /** |
| * A rule to replace the type being rebound with a class whose name is determined by a generator |
| * class. Generators usually generate new classes during the deferred binding process, but it is not |
| * required. |
| */ |
| public class RuleGenerateWith extends Rule { |
| |
| public static final Set<String> ALL_PROPERTIES = ImmutableSet.of(RunsLocal.ALL); |
| |
| /** |
| * Returns a Set of the names of properties that will be accessed by the given Generator. |
| */ |
| public static Set<String> getAccessedPropertyNames(Class<? extends Generator> generatorClass) { |
| RunsLocal runsLocal = generatorClass.getAnnotation(RunsLocal.class); |
| return runsLocal == null ? ALL_PROPERTIES : ImmutableSet.copyOf(runsLocal.requiresProperties()); |
| } |
| |
| private Generator generator; |
| private final Class<? extends Generator> generatorClass; |
| |
| public RuleGenerateWith(Class<? extends Generator> generatorClass) { |
| this.generatorClass = generatorClass; |
| } |
| |
| /** |
| * Returns whether the output of the Generator being managed by this rule depends on access to the |
| * global set of types to be able to run accurately. |
| */ |
| public boolean contentDependsOnTypes() { |
| return generatorClass.getAnnotation(RunsLocal.class) == null; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj == null) { |
| return false; |
| } |
| if (!(obj instanceof RuleGenerateWith)) { |
| return false; |
| } |
| RuleGenerateWith other = (RuleGenerateWith) obj; |
| if (generatorClass == null) { |
| if (other.generatorClass != null) { |
| return false; |
| } |
| } else if (!generatorClass.equals(other.generatorClass)) { |
| return false; |
| } |
| return true; |
| } |
| |
| /** |
| * Returns the name of the class of Generator being managed here. |
| */ |
| public String getName() { |
| return generatorClass.getName(); |
| } |
| |
| @Override |
| public int hashCode() { |
| final int prime = 31; |
| int result = 1; |
| result = prime * result + ((generatorClass == null) ? 0 : generatorClass.hashCode()); |
| return result; |
| } |
| |
| @Override |
| public RebindResult realize(TreeLogger logger, |
| StandardGeneratorContext context, String typeName) |
| throws UnableToCompleteException { |
| return context.runGeneratorIncrementally(logger, generatorClass, typeName); |
| } |
| |
| @Override |
| public String toString() { |
| return "<generate-with class='" + generatorClass.getName() + "'/>"; |
| } |
| |
| @VisibleForTesting |
| protected Generator getGenerator() { |
| if (generator == null) { |
| try { |
| generator = generatorClass.newInstance(); |
| } catch (InstantiationException e) { |
| throw new InternalCompilerException( |
| "Could not instantiate generator " + generatorClass.getSimpleName()); |
| } catch (IllegalAccessException e) { |
| throw new InternalCompilerException( |
| "Could not instantiate generator " + generatorClass.getSimpleName()); |
| } |
| } |
| return generator; |
| } |
| } |