Add DownloadService implementation

1 files changed, 111 insertions, 0 deletions

diff --git a/netx/net/sourceforge/jnlp/runtime/LocateJnlpClassLoader.java b/netx/net/sourceforge/jnlp/runtime/LocateJnlpClassLoader.java
new file mode 100644
index 0000000..c7e42f0
--- /dev/null
+++ b/netx/net/sourceforge/jnlp/runtime/LocateJnlpClassLoader.java
@@ -0,0 +1,111 @@
+/* LocateJNLPClassLoader.java
+Copyright (C) 2012, Red Hat, Inc.
+
+This file is part of IcedTea.
+
+IcedTea is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License as published by
+the Free Software Foundation, version 2.
+
+IcedTea is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with IcedTea; see the file COPYING.  If not, write to
+the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version.
+*/
+
+package net.sourceforge.jnlp.runtime;
+
+import java.net.URL;
+import net.sourceforge.jnlp.JARDesc;
+import net.sourceforge.jnlp.JNLPFile;
+import net.sourceforge.jnlp.ResourcesDesc;
+import net.sourceforge.jnlp.Version;
+
+class LocateJnlpClassLoader {
+
+    /**
+     * Locates the JNLPClassLoader of the JNLP file.
+     * @param rootClassLoader Root JNLPClassLoader of the application.
+     * @param urlToJnlpFile Path of the JNLP file. If null, main JNLP's file location
+     * be used instead
+     * @return the JNLPClassLoader of the JNLP file.
+     */
+    static JNLPClassLoader getLoaderByJnlpFile(final JNLPClassLoader rootClassLoader, URL urlToJnlpFile) {
+
+        if (rootClassLoader == null)
+            return null;
+
+        JNLPFile file = rootClassLoader.getJNLPFile();
+
+        if (urlToJnlpFile == null)
+            urlToJnlpFile = rootClassLoader.getJNLPFile().getFileLocation();
+
+        if (file.getFileLocation().equals(urlToJnlpFile))
+            return rootClassLoader;
+
+        for (JNLPClassLoader loader : rootClassLoader.getLoaders()) {
+            if (rootClassLoader != loader) {
+                JNLPClassLoader foundLoader = LocateJnlpClassLoader.getLoaderByJnlpFile(loader, urlToJnlpFile);
+                if (foundLoader != null)
+                    return foundLoader;
+            }
+        }
+
+        return null;
+    }
+
+    /**
+     * Locates the JNLPClassLoader of the JNLP file's resource.
+     * @param rootClassLoader Root JNLPClassLoader of the application.
+     * @param urlToJnlpFile Path of the launch or extension JNLP File. If null,
+     * main JNLP's file location will be used instead.
+     * @param version The version of resource. Is null if no version is specified
+     * @return the JNLPClassLoader of the JNLP file's resource.
+     */
+    static JNLPClassLoader getLoaderByResourceUrl(final JNLPClassLoader rootClassLoader, final URL ref, final String version) {
+        Version resourceVersion = (version == null) ? null : new Version(version);
+
+        for (JNLPClassLoader loader : rootClassLoader.getLoaders()) {
+            ResourcesDesc resources = loader.getJNLPFile().getResources();
+
+            for (JARDesc eachJar : resources.getJARs()) {
+                if (ref.equals(eachJar.getLocation()) &&
+                        (resourceVersion == null || resourceVersion.equals(eachJar.getVersion())))
+                    return loader;
+            }
+        }
+
+        for (JNLPClassLoader loader : rootClassLoader.getLoaders()) {
+            if (rootClassLoader != loader) {
+                JNLPClassLoader foundLoader = LocateJnlpClassLoader.getLoaderByResourceUrl(loader, ref, version);
+
+                if (foundLoader != null)
+                    return foundLoader;
+            }
+        }
+
+        return null;
+    }
+}