| // Copyright 2006, 2008 The Apache Software Foundation |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package org.apache.tapestry5.internal.services; |
| |
| import org.apache.tapestry5.ioc.Resource; |
| import org.apache.tapestry5.ioc.internal.util.AbstractResource; |
| import static org.apache.tapestry5.ioc.internal.util.Defense.notNull; |
| import org.apache.tapestry5.services.Context; |
| |
| import java.io.File; |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| |
| /** |
| * A resource stored with in the web application context. |
| */ |
| public class ContextResource extends AbstractResource |
| { |
| private static final int PRIME = 37; |
| |
| private final Context context; |
| |
| public ContextResource(Context context, String path) |
| { |
| super(path); |
| |
| notNull(context, "context"); |
| |
| this.context = context; |
| } |
| |
| @Override |
| public String toString() |
| { |
| return String.format("context:%s", getPath()); |
| } |
| |
| @Override |
| protected Resource newResource(String path) |
| { |
| return new ContextResource(context, path); |
| } |
| |
| public URL toURL() |
| { |
| // This is so easy to screw up; ClassLoader.getResource() doesn't want a leading slash, |
| // and HttpServletContext.getResource() does. This is what I mean when I say that |
| // a framework is an accumulation of the combined experience of many users and developers. |
| |
| String contextPath = "/" + getPath(); |
| |
| // Always prefer the actual file to the URL. This is critical for templates to |
| // reload inside Tomcat. |
| |
| File file = context.getRealFile(contextPath); |
| |
| if (file != null && file.exists()) |
| { |
| try |
| { |
| return file.toURL(); |
| } |
| catch (MalformedURLException ex) |
| { |
| throw new RuntimeException(ex); |
| } |
| } |
| |
| // But, when packaged inside a WAR or JAR, the File will not be available, so use whatever |
| // URL we get ... but reloading won't work. |
| |
| return context.getResource(contextPath); |
| } |
| |
| @Override |
| public int hashCode() |
| { |
| return PRIME * context.hashCode() + getPath().hashCode(); |
| } |
| |
| @Override |
| public boolean equals(Object obj) |
| { |
| if (this == obj) return true; |
| if (obj == null) return false; |
| if (getClass() != obj.getClass()) return false; |
| |
| final ContextResource other = (ContextResource) obj; |
| |
| return context == other.context && getPath().equals(other.getPath()); |
| } |
| |
| } |