    001    // Copyright 2006, 2007, 2008, 2011 The Apache Software Foundation
    002    //
    003    // Licensed under the Apache License, Version 2.0 (the "License");
    004    // you may not use this file except in compliance with the License.
    005    // You may obtain a copy of the License at
    006    //
    007    // http://www.apache.org/licenses/LICENSE-2.0
    008    //
    009    // Unless required by applicable law or agreed to in writing, software
    010    // distributed under the License is distributed on an "AS IS" BASIS,
    011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    012    // See the License for the specific language governing permissions and
    013    // limitations under the License.
    014
    015    package org.apache.tapestry5.ioc.internal;
    016
    017    import java.lang.reflect.Method;
    018    import java.util.Set;
    019
    020    import org.apache.tapestry5.func.F;
    021    import org.apache.tapestry5.func.Flow;
    022    import org.apache.tapestry5.func.Mapper;
    023    import org.apache.tapestry5.ioc.AnnotationProvider;
    024    import org.apache.tapestry5.ioc.ObjectCreator;
    025    import org.apache.tapestry5.ioc.ServiceBuilderResources;
    026    import org.apache.tapestry5.ioc.def.ServiceDef3;
    027    import org.apache.tapestry5.ioc.internal.services.AnnotationProviderChain;
    028    import org.apache.tapestry5.ioc.internal.util.InternalUtils;
    029
    030    public class ServiceDefImpl implements ServiceDef3
    031    {
    032        private final Class serviceInterface;
    033
    034        private final Class serviceImplementation;
    035
    036        private final String serviceId;
    037
    038        private final String scope;
    039
    040        private final boolean eagerLoad;
    041
    042        private final ObjectCreatorSource source;
    043
    044        private final Set<Class> markers;
    045
    046        private final boolean preventDecoration;
    047
    048        /**
    049         * @param serviceInterface
    050         *            interface implemented by the service (or the service implementation class, for
    051         *            non-proxied services)
    052         * @param serviceImplementation
    053         *            service implementation class if exists
    054         * @param serviceId
    055         *            unique id for the service
    056         * @param markers
    057         *            set of marker annotation classes (will be retained not copied)
    058         * @param scope
    059         *            scope of the service (i.e., {@link org.apache.tapestry5.ioc.ScopeConstants#DEFAULT}).
    060         * @param eagerLoad
    061         *            if true, the service is realized at startup, rather than on-demand
    062         * @param preventDecoration
    063         *            if true, the service may not be decorated
    064         * @param source
    065         *            used to create the service implementation when needed
    066         */
    067        ServiceDefImpl(Class serviceInterface, Class serviceImplementation, String serviceId, Set<Class> markers,
    068                String scope, boolean eagerLoad, boolean preventDecoration, ObjectCreatorSource source)
    069        {
    070            this.serviceInterface = serviceInterface;
    071            this.serviceImplementation = serviceImplementation;
    072            this.serviceId = serviceId;
    073            this.scope = scope;
    074            this.eagerLoad = eagerLoad;
    075            this.preventDecoration = preventDecoration;
    076            this.source = source;
    077
    078            this.markers = markers;
    079        }
    080
    081        @Override
    082        public String toString()
    083        {
    084            return source.getDescription();
    085        }
    086
    087        public ObjectCreator createServiceCreator(ServiceBuilderResources resources)
    088        {
    089            return source.constructCreator(resources);
    090        }
    091
    092        public String getServiceId()
    093        {
    094            return serviceId;
    095        }
    096
    097        public Class getServiceInterface()
    098        {
    099            return serviceInterface;
    100        }
    101
    102        public String getServiceScope()
    103        {
    104            return scope;
    105        }
    106
    107        public boolean isEagerLoad()
    108        {
    109            return eagerLoad;
    110        }
    111
    112        public Set<Class> getMarkers()
    113        {
    114            return markers;
    115        }
    116
    117        public boolean isPreventDecoration()
    118        {
    119            return preventDecoration;
    120        }
    121
    122        private Flow<Class> searchPath()
    123        {
    124            return F.flow(serviceImplementation, serviceInterface).removeNulls();
    125        }
    126
    127        public AnnotationProvider getClassAnnotationProvider()
    128        {
    129            return AnnotationProviderChain.create(searchPath().map(InternalUtils.CLASS_TO_AP_MAPPER).toList());
    130        }
    131
    132        public AnnotationProvider getMethodAnnotationProvider(final String methodName, final Class... argumentTypes)
    133        {
    134            return AnnotationProviderChain.create(searchPath().map(new Mapper<Class, Method>()
    135            {
    136                public Method map(Class element)
    137                {
    138                    return InternalUtils.findMethod(element, methodName, argumentTypes);
    139                }
    140            }).map(InternalUtils.METHOD_TO_AP_MAPPER).toList());
    141        }
    142    }