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
015package org.apache.tapestry5.ioc.internal;
016
017import java.lang.reflect.Method;
018import java.util.Set;
019
020import org.apache.tapestry5.func.F;
021import org.apache.tapestry5.func.Flow;
022import org.apache.tapestry5.func.Mapper;
023import org.apache.tapestry5.ioc.AnnotationProvider;
024import org.apache.tapestry5.ioc.ObjectCreator;
025import org.apache.tapestry5.ioc.ServiceBuilderResources;
026import org.apache.tapestry5.ioc.def.ServiceDef3;
027import org.apache.tapestry5.ioc.internal.services.AnnotationProviderChain;
028import org.apache.tapestry5.ioc.internal.util.InternalUtils;
029
030public 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}