| /* |
| * Copyright (c) 2008, Rickard Öberg. All Rights Reserved. |
| * |
| * 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 org.apache.zest.runtime.composite; |
| |
| import java.lang.reflect.InvocationHandler; |
| import java.lang.reflect.Method; |
| import java.util.List; |
| import org.apache.zest.api.common.ConstructionException; |
| import org.apache.zest.api.composite.CompositeInstance; |
| import org.apache.zest.api.injection.scope.This; |
| import org.apache.zest.api.mixin.Initializable; |
| import org.apache.zest.api.mixin.InitializationException; |
| import org.apache.zest.api.mixin.MixinDescriptor; |
| import org.apache.zest.api.property.StateHolder; |
| import org.apache.zest.functional.HierarchicalVisitor; |
| import org.apache.zest.functional.Iterables; |
| import org.apache.zest.functional.VisitableHierarchy; |
| import org.apache.zest.runtime.injection.DependencyModel; |
| import org.apache.zest.runtime.injection.InjectedFieldsModel; |
| import org.apache.zest.runtime.injection.InjectedMethodsModel; |
| import org.apache.zest.runtime.injection.InjectionContext; |
| |
| import static org.apache.zest.functional.Iterables.map; |
| import static org.apache.zest.functional.Iterables.toList; |
| import static org.apache.zest.functional.Iterables.unique; |
| |
| /** |
| * JAVADOC |
| */ |
| public final class MixinModel |
| implements MixinDescriptor, VisitableHierarchy<Object, Object> |
| { |
| private final Class<?> mixinClass; |
| private final Class<?> instantiationClass; |
| private final ConstructorsModel constructorsModel; |
| private final InjectedFieldsModel injectedFieldsModel; |
| private final InjectedMethodsModel injectedMethodsModel; |
| private final Iterable<Class<?>> thisMixinTypes; |
| |
| public MixinModel( Class<?> declaredMixinClass, Class<?> instantiationClass ) |
| { |
| injectedFieldsModel = new InjectedFieldsModel( declaredMixinClass ); |
| injectedMethodsModel = new InjectedMethodsModel( declaredMixinClass ); |
| |
| this.mixinClass = declaredMixinClass; |
| this.instantiationClass = instantiationClass; |
| constructorsModel = new ConstructorsModel( instantiationClass ); |
| |
| thisMixinTypes = buildThisMixinTypes(); |
| } |
| |
| @Override |
| public Class<?> mixinClass() |
| { |
| return mixinClass; |
| } |
| |
| public Class<?> instantiationClass() |
| { |
| return instantiationClass; |
| } |
| |
| public boolean isGeneric() |
| { |
| return InvocationHandler.class.isAssignableFrom( mixinClass ); |
| } |
| |
| public Iterable<DependencyModel> dependencies() |
| { |
| return Iterables.flatten( constructorsModel.dependencies(), injectedFieldsModel.dependencies(), injectedMethodsModel |
| .dependencies() ); |
| } |
| |
| @Override |
| public <ThrowableType extends Throwable> boolean accept( HierarchicalVisitor<? super Object, ? super Object, ThrowableType> visitor ) |
| throws ThrowableType |
| { |
| if( visitor.visitEnter( this ) ) |
| { |
| if( constructorsModel.accept( visitor ) ) |
| { |
| if( injectedFieldsModel.accept( visitor ) ) |
| { |
| injectedMethodsModel.accept( visitor ); |
| } |
| } |
| } |
| return visitor.visitLeave( this ); |
| } |
| |
| // Context |
| public Object newInstance( CompositeInstance compositeInstance, StateHolder state, UsesInstance uses ) |
| { |
| InjectionContext injectionContext = new InjectionContext( compositeInstance, uses, state ); |
| return newInstance( injectionContext ); |
| } |
| |
| public Object newInstance( InjectionContext injectionContext ) |
| { |
| Object mixin; |
| CompositeInstance compositeInstance = injectionContext.compositeInstance(); |
| |
| mixin = constructorsModel.newInstance( injectionContext ); |
| |
| if( FragmentClassLoader.isGenerated( instantiationClass ) ) |
| { |
| try |
| { |
| instantiationClass.getDeclaredField( "_instance" ).set( mixin, |
| injectionContext.compositeInstance() ); |
| } |
| catch( IllegalAccessException e ) |
| { |
| e.printStackTrace(); |
| } |
| catch( NoSuchFieldException e ) |
| { |
| e.printStackTrace(); |
| } |
| } |
| |
| injectedFieldsModel.inject( injectionContext, mixin ); |
| injectedMethodsModel.inject( injectionContext, mixin ); |
| if( mixin instanceof Initializable ) |
| { |
| try |
| { |
| ( (Initializable) mixin ).initialize(); |
| } |
| catch( InitializationException e ) |
| { |
| List<Class<?>> compositeType = toList( compositeInstance.types() ); |
| String message = "Unable to initialize " + mixinClass + " in composite " + compositeType; |
| throw new ConstructionException( message, e ); |
| } |
| } |
| return mixin; |
| } |
| |
| public Iterable<Class<?>> thisMixinTypes() |
| { |
| return thisMixinTypes; |
| } |
| |
| private Iterable<Class<?>> buildThisMixinTypes() |
| { |
| return map( new DependencyModel.InjectionTypeFunction(), unique( Iterables.filter( new DependencyModel.ScopeSpecification( This.class ), dependencies() ) ) ); |
| } |
| |
| protected FragmentInvocationHandler newInvocationHandler( Method method ) |
| { |
| if( InvocationHandler.class.isAssignableFrom( mixinClass ) |
| && !method.getDeclaringClass().isAssignableFrom( mixinClass ) ) |
| { |
| return new GenericFragmentInvocationHandler(); |
| } |
| else |
| { |
| return new TypedModifierInvocationHandler(); |
| } |
| } |
| |
| @Override |
| public String toString() |
| { |
| return mixinClass.getName(); |
| } |
| |
| } |