001    // Copyright 2010 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.internal.services.linktransform;
016    
017    import org.apache.tapestry5.Link;
018    import org.apache.tapestry5.ioc.annotations.Primary;
019    import org.apache.tapestry5.services.ComponentEventRequestParameters;
020    import org.apache.tapestry5.services.PageRenderRequestParameters;
021    import org.apache.tapestry5.services.Request;
022    import org.apache.tapestry5.services.linktransform.ComponentEventLinkTransformer;
023    import org.apache.tapestry5.services.linktransform.LinkTransformer;
024    import org.apache.tapestry5.services.linktransform.PageRenderLinkTransformer;
025    
026    public class LinkTransformerImpl implements LinkTransformer
027    {
028        private final ComponentEventLinkTransformer componentEventLinkTransformer;
029    
030        private final PageRenderLinkTransformer pageRenderLinkTransformer;
031    
032        public LinkTransformerImpl(@Primary
033        ComponentEventLinkTransformer componentEventLinkTransformer, @Primary
034        PageRenderLinkTransformer pageRenderLinkTransformer)
035        {
036            this.componentEventLinkTransformer = componentEventLinkTransformer;
037            this.pageRenderLinkTransformer = pageRenderLinkTransformer;
038        }
039    
040        public Link transformComponentEventLink(Link defaultLink, ComponentEventRequestParameters parameters)
041        {
042            return or(componentEventLinkTransformer.transformComponentEventLink(defaultLink, parameters), defaultLink);
043        }
044    
045        public Link transformPageRenderLink(Link defaultLink, PageRenderRequestParameters parameters)
046        {
047            return or(pageRenderLinkTransformer.transformPageRenderLink(defaultLink, parameters), defaultLink);
048        }
049    
050        public ComponentEventRequestParameters decodeComponentEventRequest(Request request)
051        {
052            return componentEventLinkTransformer.decodeComponentEventRequest(request);
053        }
054    
055        public PageRenderRequestParameters decodePageRenderRequest(Request request)
056        {
057            return pageRenderLinkTransformer.decodePageRenderRequest(request);
058        }
059    
060        private Link or(Link left, Link right)
061        {
062            return left != null ? left : right;
063        }
064    
065    }