1 files changed, 124 insertions, 0 deletions
diff --git a/sandbox/old/contrib/runtime-webapp/webapp-api/src/main/java/org/apache/tuscany/runtime/webapp/WebappUtilImpl.java b/sandbox/old/contrib/runtime-webapp/webapp-api/src/main/java/org/apache/tuscany/runtime/webapp/WebappUtilImpl.java
new file mode 100644
index 0000000000..fcaec7f8ac
--- /dev/null
+++ b/sandbox/old/contrib/runtime-webapp/webapp-api/src/main/java/org/apache/tuscany/runtime/webapp/WebappUtilImpl.java
@@ -0,0 +1,124 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.tuscany.runtime.webapp;
+
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.net.URLClassLoader;
+import java.util.Set;
+import javax.servlet.ServletContext;
+
+import static org.apache.tuscany.runtime.webapp.Constants.APPLICATION_SCDL_PATH_DEFAULT;
+import static org.apache.tuscany.runtime.webapp.Constants.APPLICATION_SCDL_PATH_PARAM;
+import static org.apache.tuscany.runtime.webapp.Constants.BOOTDIR_DEFAULT;
+import static org.apache.tuscany.runtime.webapp.Constants.BOOTDIR_PARAM;
+import static org.apache.tuscany.runtime.webapp.Constants.RUNTIME_DEFAULT;
+import static org.apache.tuscany.runtime.webapp.Constants.RUNTIME_PARAM;
+import static org.apache.tuscany.runtime.webapp.Constants.SYSTEM_SCDL_PATH_DEFAULT;
+import static org.apache.tuscany.runtime.webapp.Constants.SYSTEM_SCDL_PATH_PARAM;
+
+/**
+ * @version $Rev$ $Date$
+ */
+public class WebappUtilImpl implements WebappUtil {
+    private final ServletContext servletContext;
+
+    public WebappUtilImpl(ServletContext servletContext) {
+        this.servletContext = servletContext;
+    }
+
+    public WebappRuntime getRuntime(ClassLoader bootClassLoader) throws TuscanyInitException {
+        try {
+            String className = getInitParameter(RUNTIME_PARAM, RUNTIME_DEFAULT);
+            return (WebappRuntime) bootClassLoader.loadClass(className).newInstance();
+        } catch (InstantiationException e) {
+            throw new TuscanyInitException(e);
+        } catch (IllegalAccessException e) {
+            throw new TuscanyInitException(e);
+        } catch (ClassNotFoundException e) {
+            throw new TuscanyInitException("Runtime Implementation not found", e);
+        }
+    }
+
+    public ClassLoader getBootClassLoader(ClassLoader webappClassLoader) throws InvalidResourcePath {
+        String bootDirName = getInitParameter(BOOTDIR_PARAM, BOOTDIR_DEFAULT);
+        Set paths = servletContext.getResourcePaths(bootDirName);
+        if (paths == null) {
+            // nothing in boot directory, assume everything is in the webapp classloader
+            return webappClassLoader;
+        }
+        URL[] urls = new URL[paths.size()];
+        int i = 0;
+        for (Object path : paths) {
+            try {
+                urls[i++] = servletContext.getResource((String) path);
+            } catch (MalformedURLException e) {
+                throw new InvalidResourcePath(APPLICATION_SCDL_PATH_PARAM, path.toString(),  e);
+            }
+        }
+        return new URLClassLoader(urls, webappClassLoader);
+    }
+
+    public URL getSystemScdl(ClassLoader bootClassLoader) throws InvalidResourcePath {
+        String path = getInitParameter(SYSTEM_SCDL_PATH_PARAM, SYSTEM_SCDL_PATH_DEFAULT);
+        try {
+            return getScdlURL(path, bootClassLoader);
+        } catch (MalformedURLException e) {
+            throw new InvalidResourcePath(SYSTEM_SCDL_PATH_PARAM, path, e);
+        }
+    }
+
+    public String getApplicationName() {
+        String name = servletContext.getServletContextName();
+        if (name == null) {
+            name = "application";
+        }
+        return name;
+    }
+
+    public URL getApplicationScdl(ClassLoader bootClassLoader) throws InvalidResourcePath {
+        String path = getInitParameter(APPLICATION_SCDL_PATH_PARAM, APPLICATION_SCDL_PATH_DEFAULT);
+        try {
+            return getScdlURL(path, bootClassLoader);
+        } catch (MalformedURLException e) {
+            throw new InvalidResourcePath(APPLICATION_SCDL_PATH_PARAM, path, e);
+        }
+    }
+
+    public URL getScdlURL(String path, ClassLoader classLoader) throws MalformedURLException {
+        URL ret = null;
+        if (path.charAt(0) == '/') {
+            // user supplied an absolute path - look up as a webapp resource
+            ret = servletContext.getResource(path);
+        }
+        if (ret == null) {
+            // user supplied a relative path - look up as a boot classpath resource
+            ret = classLoader.getResource(path);
+        }
+        return ret;
+    }
+
+    public String getInitParameter(String name, String value) {
+        String result = servletContext.getInitParameter(name);
+        if (result != null && result.length() != 0) {
+            return result;
+        }
+        return value;
+    }
+}