| /* |
| * Copyright (c) 2007, 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.api; |
| |
| import java.lang.reflect.Field; |
| import java.lang.reflect.InvocationHandler; |
| import java.lang.reflect.Proxy; |
| import org.apache.zest.api.association.AbstractAssociation; |
| import org.apache.zest.api.association.AssociationDescriptor; |
| import org.apache.zest.api.composite.Composite; |
| import org.apache.zest.api.composite.CompositeDescriptor; |
| import org.apache.zest.api.composite.CompositeInstance; |
| import org.apache.zest.api.composite.InvalidCompositeException; |
| import org.apache.zest.api.composite.ModelDescriptor; |
| import org.apache.zest.api.composite.TransientDescriptor; |
| import org.apache.zest.api.entity.EntityDescriptor; |
| import org.apache.zest.api.property.Property; |
| import org.apache.zest.api.property.PropertyDescriptor; |
| import org.apache.zest.api.service.ServiceDescriptor; |
| import org.apache.zest.api.structure.Module; |
| import org.apache.zest.api.value.ValueDescriptor; |
| import org.apache.zest.functional.Function; |
| |
| /** |
| * Encapsulation of the Zest API. |
| */ |
| public interface Qi4j |
| { |
| /** |
| * If a Modifier gets a reference to the Composite using @This, |
| * then that reference must be dereferenced using this method |
| * before handing it out for others to use. |
| * |
| * @param <T> Parameterized type of the Composite |
| * @param composite instance reference injected in Modified using @This |
| * |
| * @return the dereferenced Composite |
| */ |
| <T> T dereference( T composite ); |
| |
| /** |
| * Returns the Module or UnitOfWork where the Composite belongs. |
| * |
| * @param compositeOrUow The Composite (Service, Value, Entity or Transient) or UnitOfWork to lookup the Module it |
| * belongs to. |
| * |
| * @return The Module instance where the Composite or UnitOfWork belongs to. |
| */ |
| Module moduleOf( Object compositeOrUow ); |
| |
| /** |
| * Returns the ModelDescriptor of the Composite. |
| * |
| * @param compositeOrServiceReference The Composite (Service, Value, Entity or Transient) for which to lookup the |
| * ModelDescriptor |
| * |
| * @return The ModelDescriptor of the Composite |
| */ |
| ModelDescriptor modelDescriptorFor( Object compositeOrServiceReference ); |
| |
| /** |
| * Returns the CompositeDescriptor of the Composite. |
| * |
| * @param compositeOrServiceReference The Composite (Service, Value, Entity or Transient) for which to lookup the |
| * CompositeDescriptor |
| * |
| * @return The CompositeDescriptor of the Composite |
| */ |
| CompositeDescriptor compositeDescriptorFor( Object compositeOrServiceReference ); |
| |
| /** |
| * Returns the TransientDescriptor of the TransientComposite. |
| * |
| * @param transsient The TransientComposite for which to lookup the TransientDescriptor |
| * |
| * @return The TransientDescriptor of the TransientComposite |
| */ |
| TransientDescriptor transientDescriptorFor( Object transsient ); |
| |
| /** |
| * Returns the EntityDescriptor of the EntityComposite. |
| * |
| * @param entity The EntityComposite for which to lookup the EntityDescriptor |
| * |
| * @return The EntityDescriptor of the EntityComposite |
| */ |
| EntityDescriptor entityDescriptorFor( Object entity ); |
| |
| /** |
| * Returns the ValueDescriptor of the ValueComposite. |
| * |
| * @param value The ValueComposite for which to lookup the ValueDescriptor |
| * |
| * @return The ValueDescriptor of the ValueComposite |
| */ |
| ValueDescriptor valueDescriptorFor( Object value ); |
| |
| /** |
| * Returns the ServiceDescriptor of the ServiceComposite. |
| * |
| * @param service The ServiceComposite for which to lookup the ServiceDescriptor |
| * |
| * @return The ServiceDescriptor of the ServiceComposite |
| */ |
| ServiceDescriptor serviceDescriptorFor( Object service ); |
| |
| /** |
| * Returns the PropertyDescriptor of the Property. |
| * |
| * @param property The Property for which to lookup the PropertyDescriptor |
| * |
| * @return The PropertyDescriptor of the Property |
| */ |
| PropertyDescriptor propertyDescriptorFor( Property<?> property ); |
| |
| /** |
| * Returns the AssociationDescriptor of the Association. |
| * |
| * @param association The Association for which to lookup the AssociationDescriptor |
| * |
| * @return The AssociationDescriptor of the Association |
| */ |
| AssociationDescriptor associationDescriptorFor( AbstractAssociation association ); |
| |
| /** |
| * Function that returns the CompositeDescriptor of a Composite. |
| */ |
| Function<Composite, CompositeDescriptor> FUNCTION_DESCRIPTOR_FOR = new Function<Composite, CompositeDescriptor>() |
| { |
| @Override |
| public CompositeDescriptor map( Composite composite ) |
| { |
| if( composite instanceof Proxy ) |
| { |
| InvocationHandler invocationHandler = Proxy.getInvocationHandler( composite ); |
| return ( (CompositeInstance) invocationHandler ).descriptor(); |
| } |
| try |
| { |
| Class<? extends Composite> compositeClass = composite.getClass(); |
| Field instanceField = compositeClass.getField( "_instance" ); |
| Object instance = instanceField.get( composite ); |
| return ( (CompositeInstance) instance ).descriptor(); |
| } |
| catch( Exception e ) |
| { |
| InvalidCompositeException exception = new InvalidCompositeException( "Could not get _instance field" ); |
| exception.initCause( e ); |
| throw exception; |
| } |
| } |
| }; |
| |
| /** |
| * Function that returns the CompositeInstance of a Composite. |
| */ |
| Function<Composite, CompositeInstance> FUNCTION_COMPOSITE_INSTANCE_OF = new Function<Composite, CompositeInstance>() |
| { |
| @Override |
| public CompositeInstance map( Composite composite ) |
| { |
| if( composite instanceof Proxy ) |
| { |
| return ( (CompositeInstance) Proxy.getInvocationHandler( composite ) ); |
| } |
| try |
| { |
| Class<? extends Composite> compositeClass = composite.getClass(); |
| Field instanceField = compositeClass.getField( "_instance" ); |
| Object instance = instanceField.get( composite ); |
| return (CompositeInstance) instance; |
| } |
| catch( Exception e ) |
| { |
| InvalidCompositeException exception = new InvalidCompositeException( "Could not get _instance field" ); |
| exception.initCause( e ); |
| throw exception; |
| } |
| } |
| }; |
| } |