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Merge pull request google#279 from cgruber/speeduploader
Rework the default loader into a cleaner, more explicit FallbackLoader
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,69 @@ | ||
| /* | ||
| * Copyright (C) 2013 Square, Inc. | ||
| * Copyright (C) 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 dagger.internal; | ||
|
|
||
|
|
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| import dagger.internal.loaders.GeneratedAdapters; | ||
| import dagger.internal.loaders.ReflectiveAtInjectBinding; | ||
| import dagger.internal.loaders.ReflectiveModuleAdapter; | ||
| import dagger.internal.loaders.ReflectiveStaticInjection; | ||
|
|
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| /** | ||
| * Handles loading/finding of modules, injection bindings, and static injections by use of a | ||
| * strategy of "load the appropriate generated code" or, if no such code is found, create a | ||
| * reflective equivalent. | ||
| */ | ||
| public final class FailoverLoader implements Loader { | ||
|
|
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| /** | ||
| * Obtains a module adapter for {@code module} from the first responding resolver. | ||
| */ | ||
| @Override public <T> ModuleAdapter<T> getModuleAdapter(Class<? extends T> type, T instance) { | ||
| ModuleAdapter<T> result = GeneratedAdapters.initModuleAdapter(type); | ||
| if (result == null) { | ||
| result = ReflectiveModuleAdapter.create(type); | ||
| } | ||
| result.module = (instance != null) ? instance : result.newModule(); | ||
| return result; | ||
| } | ||
|
|
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| @Override public Binding<?> getAtInjectBinding(String key, String className, | ||
| ClassLoader classLoader, boolean mustHaveInjections) { | ||
| try { | ||
| Binding<?> result = GeneratedAdapters.initInjectAdapter(className, classLoader); | ||
| if (result == null) { | ||
| // A null classloader is the system classloader. | ||
| classLoader = (classLoader != null) ? classLoader : ClassLoader.getSystemClassLoader(); | ||
| Class<?> c = classLoader.loadClass(className); | ||
| if (!c.isInterface()) { | ||
| result = ReflectiveAtInjectBinding.create(c, mustHaveInjections); | ||
| } | ||
| } | ||
| return result; | ||
| } catch (ClassNotFoundException e) { | ||
| throw new RuntimeException("Could not find " + className + " needed for binding " + key, e); | ||
| } | ||
| } | ||
|
|
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| @Override public StaticInjection getStaticInjection(Class<?> injectedClass) { | ||
| StaticInjection result = GeneratedAdapters.initStaticInjection(injectedClass); | ||
| if (result == null) { | ||
| result = ReflectiveStaticInjection.create(injectedClass); | ||
| } | ||
| return result; | ||
| } | ||
| } |
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75 changes: 75 additions & 0 deletions
75
core/src/main/java/dagger/internal/loaders/GeneratedAdapters.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,75 @@ | ||
| /* | ||
| * Copyright (C) 2013 Square, Inc. | ||
| * Copyright (C) 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 dagger.internal.loaders; | ||
|
|
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| import dagger.internal.Binding; | ||
| import dagger.internal.ModuleAdapter; | ||
| import dagger.internal.StaticInjection; | ||
| import java.lang.reflect.Constructor; | ||
| import java.lang.reflect.InvocationTargetException; | ||
| import java.util.logging.Level; | ||
| import java.util.logging.Logger; | ||
|
|
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| /** | ||
| * A utility for loading and initializing generated adapters. | ||
| */ | ||
| public final class GeneratedAdapters { | ||
| private static final String SEPARATOR = "$$"; | ||
| public static final String INJECT_ADAPTER_SUFFIX = SEPARATOR + "InjectAdapter"; | ||
| public static final String MODULE_ADAPTER_SUFFIX = SEPARATOR + "ModuleAdapter"; | ||
| public static final String STATIC_INJECTION_SUFFIX = SEPARATOR + "StaticInjection"; | ||
| private static final Logger logger = Logger.getLogger(GeneratedAdapters.class.getName()); | ||
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| private GeneratedAdapters() { } | ||
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| public static <T> ModuleAdapter<T> initModuleAdapter(Class<? extends T> moduleClass) { | ||
| return instantiate(moduleClass.getName() + MODULE_ADAPTER_SUFFIX, moduleClass.getClassLoader()); | ||
| } | ||
|
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| public static Binding<?> initInjectAdapter(String className, ClassLoader classLoader) { | ||
| return instantiate(className + INJECT_ADAPTER_SUFFIX, classLoader); | ||
| } | ||
|
|
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| public static StaticInjection initStaticInjection(Class<?> injectedClass) { | ||
| return instantiate(injectedClass.getName() + STATIC_INJECTION_SUFFIX, | ||
| injectedClass.getClassLoader()); | ||
| } | ||
|
|
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| private static <T> T instantiate(String name, ClassLoader classLoader) { | ||
| try { | ||
| // A null classloader is the system classloader. | ||
| classLoader = (classLoader != null) ? classLoader : ClassLoader.getSystemClassLoader(); | ||
| Class<?> generatedClass = classLoader.loadClass(name); | ||
| Constructor<?> constructor = generatedClass.getDeclaredConstructor(); | ||
| constructor.setAccessible(true); | ||
| return (T) constructor.newInstance(); | ||
| } catch (ClassNotFoundException e) { | ||
| if (logger.isLoggable(Level.FINE)) { | ||
| logger.log(Level.FINE, name + " could not be found.", e); | ||
| } | ||
| return null; // Not finding a class is not inherently an error, unlike finding a bad class. | ||
| } catch (NoSuchMethodException e) { | ||
| throw new RuntimeException("No default constructor found on " + name, e); | ||
| } catch (InstantiationException e) { | ||
| throw new RuntimeException("Failed to initialize " + name, e); | ||
| } catch (IllegalAccessException e) { | ||
| throw new RuntimeException("Failed to initialize " + name, e); | ||
| } catch (InvocationTargetException e) { | ||
| throw new RuntimeException("Error while initializing " + name, e.getCause()); | ||
| } | ||
| } | ||
| } |
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