    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.ServiceDef;
    027import org.apache.tapestry5.ioc.def.ServiceDef3;
    028import org.apache.tapestry5.ioc.internal.services.AnnotationProviderChain;
    029import org.apache.tapestry5.ioc.internal.util.InternalUtils;
    030
    031public class ServiceDefImpl implements ServiceDef3
    032{
    033    private final Class serviceInterface;
    034
    035    private final Class serviceImplementation;
    036
    037    private final String serviceId;
    038
    039    private final String scope;
    040
    041    private final boolean eagerLoad;
    042
    043    private final ObjectCreatorSource source;
    044
    045    private final Set<Class> markers;
    046
    047    private final boolean preventDecoration;
    048
    049    /**
    050     * @param serviceInterface
    051     *            interface implemented by the service (or the service implementation class, for
    052     *            non-proxied services)
    053     * @param serviceImplementation
    054     *            service implementation class if exists
    055     * @param serviceId
    056     *            unique id for the service
    057     * @param markers
    058     *            set of marker annotation classes (will be retained not copied)
    059     * @param scope
    060     *            scope of the service (i.e., {@link org.apache.tapestry5.ioc.ScopeConstants#DEFAULT}).
    061     * @param eagerLoad
    062     *            if true, the service is realized at startup, rather than on-demand
    063     * @param preventDecoration
    064     *            if true, the service may not be decorated
    065     * @param source
    066     *            used to create the service implementation when needed
    067     */
    068    ServiceDefImpl(Class serviceInterface, Class serviceImplementation, String serviceId, Set<Class> markers,
    069            String scope, boolean eagerLoad, boolean preventDecoration, ObjectCreatorSource source)
    070    {
    071        this.serviceInterface = serviceInterface;
    072        this.serviceImplementation = serviceImplementation;
    073        this.serviceId = serviceId;
    074        this.scope = scope;
    075        this.eagerLoad = eagerLoad;
    076        this.preventDecoration = preventDecoration;
    077        this.source = source;
    078
    079        this.markers = markers;
    080    }
    081
    082    @Override
    083    public String toString()
    084    {
    085        return source.getDescription();
    086    }
    087
    088    @Override
    089    public ObjectCreator createServiceCreator(ServiceBuilderResources resources)
    090    {
    091        return source.constructCreator(resources);
    092    }
    093
    094    @Override
    095    public String getServiceId()
    096    {
    097        return serviceId;
    098    }
    099
    100    @Override
    101    public Class getServiceInterface()
    102    {
    103        return serviceInterface;
    104    }
    105
    106    @Override
    107    public Class getServiceImplementation()
    108    {
    109        return serviceImplementation;
    110    }
    111
    112    @Override
    113    public String getServiceScope()
    114    {
    115        return scope;
    116    }
    117
    118    @Override
    119    public boolean isEagerLoad()
    120    {
    121        return eagerLoad;
    122    }
    123
    124    @Override
    125    public Set<Class> getMarkers()
    126    {
    127        return markers;
    128    }
    129
    130    @Override
    131    public boolean isPreventDecoration()
    132    {
    133        return preventDecoration;
    134    }
    135
    136    private Flow<Class> searchPath()
    137    {
    138        return F.flow(serviceImplementation, serviceInterface).removeNulls();
    139    }
    140
    141    @Override
    142    public AnnotationProvider getClassAnnotationProvider()
    143    {
    144        return AnnotationProviderChain.create(searchPath().map(InternalUtils.CLASS_TO_AP_MAPPER).toList());
    145    }
    146
    147    @Override
    148    public AnnotationProvider getMethodAnnotationProvider(final String methodName, final Class... argumentTypes)
    149    {
    150        return AnnotationProviderChain.create(searchPath().map(new Mapper<Class, Method>()
    151        {
    152            @Override
    153            public Method map(Class element)
    154            {
    155                return InternalUtils.findMethod(element, methodName, argumentTypes);
    156            }
    157        }).map(InternalUtils.METHOD_TO_AP_MAPPER).toList());
    158    }
    159
    160    @Override
    161    public int hashCode()
    162    {
    163        final int prime = 31;
    164        int result = 1;
    165        result = prime * result + ((serviceId == null) ? 0 : serviceId.hashCode());
    166        return result;
    167    }
    168
    169    @Override
    170    public boolean equals(Object obj)
    171    {
    172        if (this == obj) { return true; }
    173        if (obj == null) { return false; }
    174        if (!(obj instanceof ServiceDefImpl)) { return false; }
    175        ServiceDef other = (ServiceDef) obj;
    176        if (serviceId == null)
    177        {
    178            if (other.getServiceId() != null) { return false; }
    179        }
    180        else if (!serviceId.equals(other.getServiceId())) { return false; }
    181        return true;
    182    }
    183
    184}