    001    // Copyright 2009, 2010, 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.List;
    019    import java.util.Set;
    020
    021    import org.apache.tapestry5.ioc.IdMatcher;
    022    import org.apache.tapestry5.ioc.def.ServiceDef;
    023    import org.apache.tapestry5.ioc.internal.util.CollectionFactory;
    024    import org.apache.tapestry5.ioc.internal.util.InternalUtils;
    025    import org.apache.tapestry5.ioc.services.PlasticProxyFactory;
    026
    027    /**
    028     * Abstract base class for implementations of {@link org.apache.tapestry5.ioc.ServiceDecorator} (i.e., old school) and
    029     * {@link org.apache.tapestry5.ioc.ServiceAdvisor} (i.e., new school). "Instrumenter" is a rought approximation of what
    030     * these two approaches have in common: instrumenting of method calls of a service.
    031     *
    032     * @since 5.1.0.0
    033     */
    034    public class AbstractServiceInstrumenter
    035    {
    036        protected final Method method;
    037
    038        protected final IdMatcher idMatcher;
    039
    040        protected final String[] constraints;
    041
    042        protected final PlasticProxyFactory proxyFactory;
    043
    044        private final Set<Class> markers;
    045
    046        private final Class serviceInterface;
    047
    048        public AbstractServiceInstrumenter(Method method, String[] patterns, String[] constraints, Class serviceInterface,
    049                Set<Class> markers, PlasticProxyFactory proxyFactory)
    050        {
    051            this.method = method;
    052            this.serviceInterface = serviceInterface;
    053            this.markers = markers;
    054            this.proxyFactory = proxyFactory;
    055
    056            assert patterns != null;
    057
    058            List<IdMatcher> matchers = CollectionFactory.newList();
    059
    060            for (String pattern : patterns)
    061            {
    062                IdMatcher matcher = new IdMatcherImpl(pattern);
    063                matchers.add(matcher);
    064            }
    065
    066            idMatcher = new OrIdMatcher(matchers);
    067
    068            this.constraints = constraints != null ? constraints : new String[0];
    069        }
    070
    071        @Override
    072        public String toString()
    073        {
    074            return InternalUtils.asString(method, proxyFactory);
    075        }
    076
    077        public String[] getConstraints()
    078        {
    079            return constraints;
    080        }
    081
    082        /**
    083         * Returns true if <em>any</em> provided pattern matches the id of the service.
    084         */
    085        public boolean matches(ServiceDef serviceDef)
    086        {
    087            String serviceId = serviceDef.getServiceId();
    088
    089            return idMatcher.matches(serviceId);
    090        }
    091
    092        public Set<Class> getMarkers()
    093        {
    094            return markers;
    095        }
    096
    097        public Class getServiceInterface()
    098        {
    099            return serviceInterface;
    100        }
    101    }