| /* |
| * 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.qi4j.runtime.composite; |
| |
| import java.lang.annotation.Annotation; |
| import java.lang.reflect.AnnotatedElement; |
| import java.lang.reflect.Array; |
| import java.lang.reflect.InvocationHandler; |
| import java.lang.reflect.Method; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| import org.qi4j.api.common.ConstructionException; |
| import org.qi4j.api.composite.MethodDescriptor; |
| import org.qi4j.api.util.NullArgumentException; |
| import org.qi4j.functional.HierarchicalVisitor; |
| import org.qi4j.functional.VisitableHierarchy; |
| import org.qi4j.runtime.injection.Dependencies; |
| import org.qi4j.runtime.injection.DependencyModel; |
| import org.qi4j.spi.module.ModuleSpi; |
| |
| import static org.qi4j.functional.Iterables.filter; |
| import static org.qi4j.functional.Iterables.flattenIterables; |
| import static org.qi4j.functional.Iterables.iterable; |
| import static org.qi4j.functional.Specifications.notNull; |
| |
| /** |
| * JAVADOC |
| */ |
| public final class CompositeMethodModel |
| implements MethodDescriptor, Dependencies, VisitableHierarchy<Object, Object> |
| { |
| // Model |
| private final Method method; |
| private Method invocationMethod; // This will be the _ prefixed method on typed mixins |
| private final ConstraintsModel constraints; |
| private final ConcernsModel concerns; |
| private final SideEffectsModel sideEffects; |
| private final MixinsModel mixins; |
| private AnnotatedElement annotations; |
| |
| // Context |
| // private final SynchronizedCompositeMethodInstancePool instancePool = new SynchronizedCompositeMethodInstancePool(); |
| private final AtomicInstancePool instancePool = new AtomicInstancePool(); |
| private final ConstraintsInstance constraintsInstance; |
| |
| public CompositeMethodModel( Method method, |
| ConstraintsModel constraintsModel, |
| ConcernsModel concernsModel, |
| SideEffectsModel sideEffectsModel, |
| MixinsModel mixinsModel |
| ) |
| { |
| this.method = method; |
| mixins = mixinsModel; |
| concerns = concernsModel; |
| sideEffects = sideEffectsModel; |
| constraints = constraintsModel; |
| constraintsInstance = constraints.newInstance(); |
| initialize(); |
| } |
| |
| private void initialize() |
| { |
| annotations = new CompositeMethodAnnotatedElement(); |
| this.method.setAccessible( true ); |
| // instancePool = new SynchronizedCompositeMethodInstancePool(); |
| } |
| |
| // Model |
| |
| @Override |
| public Method method() |
| { |
| return method; |
| } |
| |
| public MixinModel mixin() |
| { |
| return mixins.mixinFor( method ); |
| } |
| |
| @Override |
| @SuppressWarnings( "unchecked" ) |
| public Iterable<DependencyModel> dependencies() |
| { |
| return flattenIterables( filter( notNull(), iterable( concerns != null ? concerns.dependencies() : null, |
| sideEffects != null ? sideEffects.dependencies() : null ) ) ); |
| } |
| |
| // Context |
| public Object invoke( Object composite, Object[] params, MixinsInstance mixins, ModuleSpi moduleInstance ) |
| throws Throwable |
| { |
| constraintsInstance.checkValid( composite, method, params ); |
| |
| CompositeMethodInstance methodInstance = getInstance( moduleInstance ); |
| try |
| { |
| return mixins.invoke( composite, params, methodInstance ); |
| } |
| finally |
| { |
| instancePool.releaseInstance( methodInstance ); |
| } |
| } |
| |
| private CompositeMethodInstance getInstance( ModuleSpi moduleInstance ) |
| { |
| CompositeMethodInstance methodInstance = instancePool.obtainInstance(); |
| if( methodInstance == null ) |
| { |
| methodInstance = newCompositeMethodInstance( moduleInstance ); |
| } |
| |
| return methodInstance; |
| } |
| |
| private CompositeMethodInstance newCompositeMethodInstance( ModuleSpi moduleInstance ) |
| throws ConstructionException |
| { |
| FragmentInvocationHandler mixinInvocationHandler = mixins.newInvocationHandler( method ); |
| InvocationHandler invoker = mixinInvocationHandler; |
| if( concerns != ConcernsModel.EMPTY_CONCERNS ) |
| { |
| ConcernsInstance concernsInstance = concerns.newInstance( method, moduleInstance, mixinInvocationHandler ); |
| invoker = concernsInstance; |
| } |
| if( sideEffects != SideEffectsModel.EMPTY_SIDEEFFECTS ) |
| { |
| SideEffectsInstance sideEffectsInstance = sideEffects.newInstance( method, moduleInstance, invoker ); |
| invoker = sideEffectsInstance; |
| } |
| |
| if( invocationMethod == null ) |
| { |
| MixinModel model = mixins.mixinFor( method ); |
| if( !InvocationHandler.class.isAssignableFrom( model.mixinClass() ) ) |
| { |
| try |
| { |
| invocationMethod = model.instantiationClass() |
| .getMethod( "_" + method.getName(), method.getParameterTypes() ); |
| } |
| catch( NoSuchMethodException e ) |
| { |
| invocationMethod = method; |
| // throw new ConstructionException( "Could not find the subclass method", e ); |
| } |
| } |
| else |
| { |
| invocationMethod = method; |
| } |
| } |
| |
| mixinInvocationHandler.setMethod( invocationMethod ); |
| |
| return new CompositeMethodInstance( invoker, mixinInvocationHandler, method, mixins.methodIndex.get( method ) ); |
| } |
| |
| public AnnotatedElement annotatedElement() |
| { |
| return annotations; |
| } |
| |
| @Override |
| public <ThrowableType extends Throwable> boolean accept( HierarchicalVisitor<? super Object, ? super Object, ThrowableType> modelVisitor ) |
| throws ThrowableType |
| { |
| if( modelVisitor.visitEnter( this ) ) |
| { |
| constraints.accept( modelVisitor ); |
| concerns.accept( modelVisitor ); |
| sideEffects.accept( modelVisitor ); |
| } |
| return modelVisitor.visitLeave( this ); |
| } |
| |
| @Override |
| public String toString() |
| { |
| return method.toGenericString(); |
| } |
| |
| public Iterable<Method> invocationsFor( Class<?> mixinClass ) |
| { |
| return mixins.invocationsFor( mixinClass ); |
| } |
| |
| public class CompositeMethodAnnotatedElement |
| implements AnnotatedElement |
| { |
| @Override |
| public boolean isAnnotationPresent( Class<? extends Annotation> annotationClass ) |
| { |
| // Check method |
| if( method.isAnnotationPresent( annotationClass ) ) |
| { |
| return true; |
| } |
| |
| // Check mixin |
| try |
| { |
| MixinModel model = mixins.mixinFor( method ); |
| if( GenericSpecification.INSTANCE.satisfiedBy( model.mixinClass() ) ) |
| { |
| return false; |
| } |
| return ( model.mixinClass() |
| .getMethod( method.getName(), method.getParameterTypes() ) |
| .isAnnotationPresent( annotationClass ) ); |
| } |
| catch( NoSuchMethodException e ) |
| { |
| return false; |
| } |
| } |
| |
| @Override |
| public <T extends Annotation> T getAnnotation( Class<T> annotationClass ) |
| { |
| // Check mixin |
| try |
| { |
| MixinModel model = mixins.mixinFor( method ); |
| if( !GenericSpecification.INSTANCE.satisfiedBy( model.mixinClass() ) ) |
| { |
| T annotation = annotationClass.cast( model.mixinClass() |
| .getMethod( method.getName(), method.getParameterTypes() ) |
| .getAnnotation( annotationClass ) ); |
| if( annotation != null ) |
| { |
| return annotation; |
| } |
| } |
| } |
| catch( NoSuchMethodException e ) |
| { |
| // Ignore |
| } |
| |
| // Check method |
| return method.getAnnotation( annotationClass ); |
| } |
| |
| @Override |
| public Annotation[] getAnnotations() |
| { |
| // Add mixin annotations |
| List<Annotation> annotations = new ArrayList<Annotation>(); |
| MixinModel model = mixins.mixinFor( method ); |
| Annotation[] mixinAnnotations = new Annotation[ 0 ]; |
| if( !GenericSpecification.INSTANCE.satisfiedBy( model.mixinClass() ) ) |
| { |
| mixinAnnotations = model.mixinClass().getAnnotations(); |
| annotations.addAll( Arrays.asList( mixinAnnotations ) ); |
| } |
| |
| // Add method annotations, but don't include duplicates |
| Annotation[] methodAnnotations = method.getAnnotations(); |
| next: |
| for( Annotation methodAnnotation : methodAnnotations ) |
| { |
| for( int i = 0; i < mixinAnnotations.length; i++ ) |
| { |
| if( annotations.get( i ).annotationType().equals( methodAnnotation.annotationType() ) ) |
| { |
| continue next; |
| } |
| } |
| |
| annotations.add( methodAnnotation ); |
| } |
| |
| return annotations.toArray( new Annotation[ annotations.size() ] ); |
| } |
| |
| @Override |
| public Annotation[] getDeclaredAnnotations() |
| { |
| return new Annotation[ 0 ]; |
| } |
| |
| // @Override (Since JDK 8) |
| @SuppressWarnings( "unchecked" ) |
| public <T extends Annotation> T[] getAnnotationsByType( Class<T> annotationClass ) |
| { |
| NullArgumentException.validateNotNull( "annotationClass", annotationClass ); |
| return (T[]) Array.newInstance( annotationClass, 0 ); |
| } |
| |
| // @Override (Since JDK 8) |
| public <T extends Annotation> T getDeclaredAnnotation( Class<T> annotationClass ) |
| { |
| NullArgumentException.validateNotNull( "annotationClass", annotationClass ); |
| return null; |
| } |
| |
| // @Override (Since JDK 8) |
| @SuppressWarnings( "unchecked" ) |
| public <T extends Annotation> T[] getDeclaredAnnotationsByType( Class<T> annotationClass ) |
| { |
| NullArgumentException.validateNotNull( "annotationClass", annotationClass ); |
| return (T[]) Array.newInstance( annotationClass, 0 ); |
| } |
| } |
| } |