001 // Copyright 2004, 2005 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.tapestry.link; 016 017 import org.apache.tapestry.IRequestCycle; 018 import org.apache.tapestry.engine.ExternalServiceParameter; 019 import org.apache.tapestry.engine.IEngineService; 020 import org.apache.tapestry.engine.ILink; 021 022 /** 023 * A component for creating a link to {@link org.apache.tapestry.IExternalPage}using the 024 * {@link org.apache.tapestry.engine.ExternalService}. [ <a 025 * href="../../../../../ComponentReference/ExternalLink.html">Component Reference </a>] 026 * 027 * @see org.apache.tapestry.IExternalPage 028 * @see org.apache.tapestry.engine.ExternalService 029 * @author Malcolm Edgar 030 */ 031 032 public abstract class ExternalLink extends AbstractLinkComponent 033 { 034 public abstract IEngineService getExternalService(); 035 036 public ILink getLink(IRequestCycle cycle) 037 { 038 Object[] serviceParameters = DirectLink.constructServiceParameters(getParameters()); 039 040 ExternalServiceParameter esp = new ExternalServiceParameter(getTargetPage(), 041 serviceParameters); 042 043 return getExternalService().getLink(false, esp); 044 } 045 046 public abstract Object getParameters(); 047 048 public abstract String getTargetPage(); 049 }