Load classes from loader of the requesting object, starting at an entry point.

checkstyle.xml

@@ -63,7 +63,10 @@
         <module name="LineLength">
             <property name="max" value="100"/>
         </module>
-        <module name="MethodLength"/>
+        <module name="MethodLength">
+            <property name="max" value="200"/>
+        </module>
+
         <!--module name="ParameterNumber"/-->
 
 

compiler/src/main/java/dagger/internal/codegen/AtInjectBinding.java

@@ -113,10 +113,12 @@ private static boolean hasAtInject(Element enclosed) {
   @Override public void attach(Linker linker) {
     String requiredBy = type.getQualifiedName().toString();
     for (int i = 0; i < keys.size(); i++) {
-      bindings[i] = linker.requestBinding(keys.get(i), requiredBy);
+      bindings[i] = linker.requestBinding(keys.get(i), requiredBy,
+          Thread.currentThread().getContextClassLoader());
     }
     if (supertypeKey != null) {
-      supertypeBinding = linker.requestBinding(supertypeKey, requiredBy, false, true);
+      supertypeBinding = linker.requestBinding(supertypeKey, requiredBy,
+          Thread.currentThread().getContextClassLoader(), false, true);
     }
   }
 

compiler/src/main/java/dagger/internal/codegen/CodeGenStaticInjection.java

@@ -34,7 +34,8 @@ public CodeGenStaticInjection(Element enclosingClass) {
         Inject injectAnnotation = enclosedElement.getAnnotation(Inject.class);
         if (injectAnnotation != null) {
           String key = GeneratorKeys.get(enclosedElement.asType());
-          linker.requestBinding(key, enclosingClass.toString());
+          linker.requestBinding(key, enclosingClass.toString(),
+              Thread.currentThread().getContextClassLoader());
         }
       }
     }

compiler/src/main/java/dagger/internal/codegen/CompileTimeLoader.java

@@ -38,7 +38,7 @@ public CompileTimeLoader(ProcessingEnvironment processingEnv) {
   }
 
   @Override public Binding<?> getAtInjectBinding(
-      String key, String className, boolean mustHaveInjections) {
+      String key, String className, ClassLoader cl, boolean mustHaveInjections) {
     String sourceClassName = className.replace('$', '.');
     TypeElement type = processingEnv.getElementUtils().getTypeElement(sourceClassName);
     if (type == null) {

compiler/src/main/java/dagger/internal/codegen/FullGraphProcessor.java

@@ -155,7 +155,8 @@ private Map<String, Binding<?>> processCompleteModule(TypeElement rootModule,
           String key = CodeGen.isInterface(injectableType)
               ? GeneratorKeys.get(injectableType)
               : GeneratorKeys.rawMembersKey(injectableType);
-          linker.requestBinding(key, module.getQualifiedName().toString(), false, true);
+          linker.requestBinding(key, module.getQualifiedName().toString(),
+              Thread.currentThread().getContextClassLoader(), false, true);
         }
 
         // Gather the static injections.
@@ -286,7 +287,8 @@ protected ProviderMethodBinding(String provideKey, ExecutableElement method, boo
       for (int i = 0; i < method.getParameters().size(); i++) {
         VariableElement parameter = method.getParameters().get(i);
         String parameterKey = GeneratorKeys.get(parameter);
-        parameters[i] = linker.requestBinding(parameterKey, method.toString());
+        parameters[i] = linker.requestBinding(parameterKey, method.toString(),
+            Thread.currentThread().getContextClassLoader());
       }
     }
 

compiler/src/main/java/dagger/internal/codegen/InjectProcessor.java

@@ -45,6 +45,7 @@
 import javax.tools.Diagnostic;
 import javax.tools.JavaFileObject;
 
+import static dagger.internal.codegen.CodeGen.typeToString;
 import static dagger.internal.codegen.ProcessorJavadocs.binderTypeDocs;
 import static dagger.internal.loaders.generated.GeneratedAdapterLoader.INJECT_ADAPTER_SUFFIX;
 import static dagger.internal.loaders.generated.GeneratedAdapterLoader.STATIC_INJECTION_SUFFIX;
@@ -277,29 +278,33 @@ private void writeInjectAdapter(TypeElement type, ExecutableElement constructor,
       writer.beginMethod("void", "attach", PUBLIC, Linker.class.getCanonicalName(), "linker");
       if (constructor != null) {
         for (VariableElement parameter : constructor.getParameters()) {
-          writer.emitStatement("%s = (%s) linker.requestBinding(%s, %s.class)",
+          writer.emitStatement(
+              "%s = (%s) linker.requestBinding(%s, %s.class, %s.class.getClassLoader())",
               parameterName(disambiguateFields, parameter),
-              writer.compressType(JavaWriter.type(Binding.class,
-                  CodeGen.typeToString(parameter.asType()))),
+              writer.compressType(JavaWriter.type(Binding.class, typeToString(parameter.asType()))),
               JavaWriter.stringLiteral(GeneratorKeys.get(parameter)),
-              strippedTypeName);
+              strippedTypeName,
+              adapterName);
         }
       }
       for (Element field : fields) {
-        writer.emitStatement("%s = (%s) linker.requestBinding(%s, %s.class)",
+        writer.emitStatement(
+            "%s = (%s) linker.requestBinding(%s, %s.class, %s.class.getClassLoader())",
             fieldName(disambiguateFields, field),
-            writer.compressType(JavaWriter.type(Binding.class,
-                CodeGen.typeToString(field.asType()))),
+            writer.compressType(JavaWriter.type(Binding.class, typeToString(field.asType()))),
             JavaWriter.stringLiteral(GeneratorKeys.get((VariableElement) field)),
-            strippedTypeName);
+            strippedTypeName,
+            adapterName);
       }
       if (supertype != null) {
-        writer.emitStatement("%s = (%s) linker.requestBinding(%s, %s.class, false, true)",
+        writer.emitStatement(
+            "%s = (%s) linker.requestBinding(%s, %s.class, %s.class.getClassLoader(), false, true)",
             "supertype",
             writer.compressType(JavaWriter.type(Binding.class,
                 CodeGen.rawTypeToString(supertype, '.'))),
             JavaWriter.stringLiteral(GeneratorKeys.rawMembersKey(supertype)),
-            strippedTypeName);
+            strippedTypeName,
+            adapterName);
       }
       writer.endMethod();
 
@@ -427,12 +432,13 @@ private void writeStaticInjection(TypeElement type, List<Element> fields) throws
     writer.emitAnnotation(Override.class);
     writer.beginMethod("void", "attach", PUBLIC, Linker.class.getName(), "linker");
     for (Element field : fields) {
-      writer.emitStatement("%s = (%s) linker.requestBinding(%s, %s.class)",
+      writer.emitStatement(
+          "%s = (%s) linker.requestBinding(%s, %s.class, %s.class.getClassLoader())",
           fieldName(false, field),
-          writer.compressType(JavaWriter.type(Binding.class,
-              CodeGen.typeToString(field.asType()))),
+          writer.compressType(JavaWriter.type(Binding.class, typeToString(field.asType()))),
           JavaWriter.stringLiteral(GeneratorKeys.get((VariableElement) field)),
-          typeName);
+          typeName,
+          adapterName);
     }
     writer.endMethod();
 

compiler/src/main/java/dagger/internal/codegen/ProvidesProcessor.java

@@ -438,12 +438,14 @@ private void writeProvidesAdapter(JavaWriter writer, ExecutableElement providerM
       writer.beginMethod("void", "attach", PUBLIC, Linker.class.getCanonicalName(), "linker");
       for (VariableElement parameter : parameters) {
         String parameterKey = GeneratorKeys.get(parameter);
-        writer.emitStatement("%s = (%s) linker.requestBinding(%s, %s.class)",
+        writer.emitStatement(
+            "%s = (%s) linker.requestBinding(%s, %s.class, %s.class.getClassLoader())",
             parameterName(parameter),
             writer.compressType(JavaWriter.type(Binding.class,
                 CodeGen.typeToString(parameter.asType()))),
             JavaWriter.stringLiteral(parameterKey),
-            writer.compressType(moduleType));
+            writer.compressType(moduleType),
+            className);
       }
       writer.endMethod();
 

core/src/main/java/dagger/ObjectGraph.java

@@ -202,7 +202,8 @@ private void linkStaticInjections() {
 
     private void linkInjectableTypes() {
       for (Map.Entry<String, Class<?>> entry : injectableTypes.entrySet()) {
-        linker.requestBinding(entry.getKey(), entry.getValue(), false, true);
+        linker.requestBinding(entry.getKey(), entry.getValue(), entry.getValue().getClassLoader(),
+            false, true);
       }
     }
 
@@ -242,43 +243,46 @@ private Map<String, Binding<?>> linkEverything() {
     @Override public <T> T get(Class<T> type) {
       String key = Keys.get(type);
       String injectableTypeKey = type.isInterface() ? key : Keys.getMembersKey(type);
+      ClassLoader cl = type.getClassLoader();
       @SuppressWarnings("unchecked") // The linker matches keys to bindings by their type.
-      Binding<T> binding = (Binding<T>) getInjectableTypeBinding(injectableTypeKey, key);
+      Binding<T> binding = (Binding<T>) getInjectableTypeBinding(cl, injectableTypeKey, key);
       return binding.get();
     }
 
     @Override public <T> T inject(T instance) {
       String membersKey = Keys.getMembersKey(instance.getClass());
+      ClassLoader cl = instance.getClass().getClassLoader();
       @SuppressWarnings("unchecked") // The linker matches keys to bindings by their type.
-      Binding<Object> binding = (Binding<Object>) getInjectableTypeBinding(membersKey, membersKey);
+      Binding<T> binding = (Binding<T>) getInjectableTypeBinding(cl, membersKey, membersKey);
       binding.injectMembers(instance);
       return instance;
     }
 
     /**
-     * @param injectableTypeKey the key used to store the injectable type. This
+     * @param cl the {@code ClassLoader} used to load dependent bindings.
+     * @param injectableKey the key used to store the injectable type. This
      *     is a provides key for interfaces and a members injection key for
      *     other types. That way keys can always be created, even if the type
      *     has no injectable constructor.
      * @param key the key to use when retrieving the binding. This may be a
      *     regular (provider) key or a members key.
      */
-    private Binding<?> getInjectableTypeBinding(String injectableTypeKey, String key) {
+    private Binding<?> getInjectableTypeBinding(ClassLoader cl, String injectableKey, String key) {
       Class<?> moduleClass = null;
       for (DaggerObjectGraph graph = this; graph != null; graph = graph.base) {
-        moduleClass = graph.injectableTypes.get(injectableTypeKey);
+        moduleClass = graph.injectableTypes.get(injectableKey);
         if (moduleClass != null) break;
       }
       if (moduleClass == null) {
-        throw new IllegalArgumentException("No inject registered for " + injectableTypeKey
+        throw new IllegalArgumentException("No inject registered for " + injectableKey
             + ". You must explicitly add it to the 'injects' option in one of your modules.");
       }
 
       synchronized (linker) {
-        Binding<?> binding = linker.requestBinding(key, moduleClass, false, true);
+        Binding<?> binding = linker.requestBinding(key, moduleClass, cl, false, true);
         if (binding == null || !binding.isLinked()) {
           linker.linkRequested();
-          binding = linker.requestBinding(key, moduleClass, false, true);
+          binding = linker.requestBinding(key, moduleClass, cl, false, true);
         }
         return binding;
       }

core/src/main/java/dagger/internal/BuiltInBinding.java

@@ -21,15 +21,17 @@
  */
 final class BuiltInBinding<T> extends Binding<T> {
   private final String delegateKey;
+  private final ClassLoader loader;
   private Binding<?> delegate;
 
-  public BuiltInBinding(String key, Object requiredBy, String delegateKey) {
+  public BuiltInBinding(String key, Object requiredBy, ClassLoader loader, String delegateKey) {
     super(key, null, false, requiredBy);
+    this.loader = loader;
     this.delegateKey = delegateKey;
   }
 
   @Override public void attach(Linker linker) {
-    delegate = linker.requestBinding(delegateKey, requiredBy);
+    delegate = linker.requestBinding(delegateKey, requiredBy, loader);
   }
 
   @Override public void injectMembers(T t) {

core/src/main/java/dagger/internal/LazyBinding.java

@@ -26,17 +26,19 @@ final class LazyBinding<T> extends Binding<Lazy<T>> {
   private final static Object NOT_PRESENT = new Object();
 
   private final String lazyKey;
+  private final ClassLoader loader;
   private Binding<T> delegate;
 
-  public LazyBinding(String key, Object requiredBy, String lazyKey) {
+  public LazyBinding(String key, Object requiredBy, ClassLoader loader, String lazyKey) {
     super(key, null, false, requiredBy);
+    this.loader = loader;
     this.lazyKey = lazyKey;
   }
 
   @SuppressWarnings("unchecked") // At runtime we know it's a Binding<Lazy<T>>.
   @Override
   public void attach(Linker linker) {
-    delegate = (Binding<T>) linker.requestBinding(lazyKey, requiredBy);
+    delegate = (Binding<T>) linker.requestBinding(lazyKey, requiredBy, loader);
   }
 
   @Override public void injectMembers(Lazy<T> t) {

core/src/main/java/dagger/internal/Linker.java

@@ -99,14 +99,15 @@ public void linkRequested() {
     Binding<?> binding;
     while ((binding = toLink.poll()) != null) {
       if (binding instanceof DeferredBinding) {
-        DeferredBinding deferredBinding = (DeferredBinding) binding;
-        String key = deferredBinding.deferredKey;
-        boolean mustHaveInjections = deferredBinding.mustHaveInjections;
+        DeferredBinding deferred = (DeferredBinding) binding;
+        String key = deferred.deferredKey;
+        boolean mustHaveInjections = deferred.mustHaveInjections;
         if (bindings.containsKey(key)) {
           continue; // A binding for this key has since been linked.
         }
         try {
-          Binding<?> jitBinding = createJitBinding(key, binding.requiredBy, mustHaveInjections);
+          Binding<?> jitBinding =
+              createJitBinding(key, binding.requiredBy, deferred.classloader, mustHaveInjections);
           jitBinding.setLibrary(binding.library());
           jitBinding.setDependedOn(binding.dependedOn());
           // Fail if the type of binding we got wasn't capable of what was requested.
@@ -167,22 +168,22 @@ private void assertLockHeld() {
    *   <li>Injections of other types will use the injectable constructors of those classes.
    * </ul>
    */
-  private Binding<?> createJitBinding(String key, Object requiredBy, boolean mustHaveInjections)
-      throws ClassNotFoundException {
+  private Binding<?> createJitBinding(String key, Object requiredBy, ClassLoader cl,
+      boolean mustHaveInjections) {
     String builtInBindingsKey = Keys.getBuiltInBindingsKey(key);
     if (builtInBindingsKey != null) {
-      return new BuiltInBinding<Object>(key, requiredBy, builtInBindingsKey);
+      return new BuiltInBinding<Object>(key, requiredBy, cl, builtInBindingsKey);
     }
     String lazyKey = Keys.getLazyKey(key);
     if (lazyKey != null) {
-      return new LazyBinding<Object>(key, requiredBy, lazyKey);
+      return new LazyBinding<Object>(key, requiredBy, cl, lazyKey);
     }
 
     String className = Keys.getClassName(key);
     if (className != null && !Keys.isAnnotated(key)) {
-      Binding<?> atInjectBinding = plugin.getAtInjectBinding(key, className, mustHaveInjections);
-      if (atInjectBinding != null) {
-        return atInjectBinding;
+      Binding<?> binding = plugin.getAtInjectBinding(key, className, cl, mustHaveInjections);
+      if (binding != null) {
+        return binding;
       }
     }
 
@@ -194,23 +195,24 @@ private Binding<?> createJitBinding(String key, Object requiredBy, boolean mustH
    * null. If the returned binding didn't exist or was unlinked, it will be
    * enqueued to be linked.
    */
-  public Binding<?> requestBinding(String key, Object requiredBy) {
-    return requestBinding(key, requiredBy, true, true);
+  public Binding<?> requestBinding(String key, Object requiredBy, ClassLoader cl) {
+    return requestBinding(key, requiredBy, cl, true, true);
   }
 
   /**
    * Returns the binding if it exists immediately. Otherwise this returns
    * null. If the returned binding didn't exist or was unlinked, it will be
    * enqueued to be linked.
+   * @param cl
    *
    * @param mustHaveInjections true if the the referenced key requires either an
    *     {@code @Inject} annotation is produced by a {@code @Provides} method.
    *     This isn't necessary for Module.injects types because frameworks need
    *     to inject arbitrary classes like JUnit test cases and Android
    *     activities. It also isn't necessary for supertypes.
    */
-  public Binding<?> requestBinding(String key, Object requiredBy, boolean mustHaveInjections,
-      boolean library) {
+  public Binding<?> requestBinding(String key, Object requiredBy, ClassLoader cl,
+      boolean mustHaveInjections, boolean library) {
     assertLockHeld();
 
     Binding<?> binding = null;
@@ -224,7 +226,7 @@ public Binding<?> requestBinding(String key, Object requiredBy, boolean mustHave
 
     if (binding == null) {
       // We can't satisfy this binding. Make sure it'll work next time!
-      Binding<?> deferredBinding = new DeferredBinding(key, requiredBy, mustHaveInjections);
+      Binding<?> deferredBinding = new DeferredBinding(key, cl, requiredBy, mustHaveInjections);
       deferredBinding.setLibrary(library);
       deferredBinding.setDependedOn(true);
       toLink.add(deferredBinding);
@@ -384,12 +386,16 @@ public interface ErrorHandler {
   }
 
   private static class DeferredBinding extends Binding<Object> {
+    /** Loader originally intended to load this binding, to be used in loading the actual one */
+    final ClassLoader classloader;
     final String deferredKey;
     final boolean mustHaveInjections;
 
-    private DeferredBinding(String deferredKey, Object requiredBy, boolean mustHaveInjections) {
+    private DeferredBinding(String deferredKey, ClassLoader classloader, Object requiredBy,
+        boolean mustHaveInjections) {
       super(null, null, false, requiredBy);
       this.deferredKey = deferredKey;
+      this.classloader = classloader;
       this.mustHaveInjections = mustHaveInjections;
     }
     @Override public void injectMembers(Object t) {

core/src/main/java/dagger/internal/Loader.java

@@ -25,7 +25,8 @@ public interface Loader {
   /**
    * Returns a binding that uses {@code @Inject} annotations.
    */
-  Binding<?> getAtInjectBinding(String key, String className, boolean mustHaveInjections);
+  Binding<?> getAtInjectBinding(
+      String key, String className, ClassLoader cl, boolean mustHaveInjections);
 
   /**
    * Returns a module adapter for {@code module}.

core/src/main/java/dagger/internal/RuntimeAggregatingLoader.java

@@ -106,11 +106,11 @@ private static void collectIncludedModulesRecursively(Loader plugin, ModuleAdapt
     throw new AssertionError();
   }
 
-  @Override public Binding<?> getAtInjectBinding(String key, String className,
+  @Override public Binding<?> getAtInjectBinding(String key, String className, ClassLoader cl,
       boolean mustHaveInjections) {
     for (int i = 0; i < plugins.length; i++) {
       try {
-        return plugins[i].getAtInjectBinding(key, className, mustHaveInjections);
+        return plugins[i].getAtInjectBinding(key, className, cl, mustHaveInjections);
       } catch (RuntimeException e) {
         if (i == plugins.length - 1) throw e;
         logNotFound("Binding", className, e);