    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    }