use jaxb to parse plugin descriptor

scm-webapp/src/main/java/sonia/scm/plugin/PluginsInternal.java

@@ -0,0 +1,207 @@
+/**
+ * Copyright (c) 2010, Sebastian Sdorra All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer. 2. Redistributions in
+ * binary form must reproduce the above copyright notice, this list of
+ * conditions and the following disclaimer in the documentation and/or other
+ * materials provided with the distribution. 3. Neither the name of SCM-Manager;
+ * nor the names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * http://bitbucket.org/sdorra/scm-manager
+ *
+ */
+
+
+
+package sonia.scm.plugin;
+
+//~--- non-JDK imports --------------------------------------------------------
+
+import com.google.common.base.Charsets;
+import com.google.common.base.Function;
+import com.google.common.collect.Iterables;
+import com.google.common.io.Files;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import sonia.scm.util.IOUtil;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import java.io.File;
+import java.io.IOException;
+
+import java.nio.file.Path;
+
+import java.util.Set;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+public final class PluginsInternal
+{
+
+  /**
+   * the logger for PluginsInternal
+   */
+  private static final Logger logger =
+    LoggerFactory.getLogger(PluginsInternal.class);
+
+  //~--- constructors ---------------------------------------------------------
+
+  /**
+   * Constructs ...
+   *
+   */
+  private PluginsInternal() {}
+
+  //~--- methods --------------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param classLoader
+   * @param directory
+   *
+   * @return
+   *
+   * @throws IOException
+   */
+  public static Set<PluginWrapper> collectPlugins(ClassLoader classLoader,
+    Path directory)
+    throws IOException
+  {
+    PluginProcessor processor = new PluginProcessor(directory);
+
+    return processor.collectPlugins(classLoader);
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param parent
+   * @param plugin
+   *
+   * @return
+   */
+  public static File createPluginDirectory(File parent, Plugin plugin)
+  {
+    PluginInformation info = plugin.getInformation();
+
+    return new File(new File(parent, info.getGroupId()), info.getArtifactId());
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param archive
+   * @param checksum
+   * @param directory
+   * @param checksumFile
+   * @param core
+   *
+   * @throws IOException
+   */
+  public static void extract(SmpArchive archive, String checksum,
+    File directory, File checksumFile, boolean core)
+    throws IOException
+  {
+    if (directory.exists())
+    {
+      logger.debug("delete directory {} for plugin extraction",
+        archive.getPlugin().getInformation().getId(false));
+      IOUtil.delete(directory);
+    }
+
+    IOUtil.mkdirs(directory);
+
+    logger.debug("extract plugin {}",
+      archive.getPlugin().getInformation().getId(false));
+    archive.extract(directory);
+    Files.write(checksum, checksumFile, Charsets.UTF_8);
+
+    if (core)
+    {
+      if (!new File(directory, PluginConstants.FILE_CORE).createNewFile())
+      {
+        throw new IOException("could not create core plugin marker");
+      }
+    }
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param wrapped
+   *
+   * @return
+   */
+  public static Iterable<Plugin> unwrap(Iterable<PluginWrapper> wrapped)
+  {
+    return Iterables.transform(wrapped, new Unwrap());
+  }
+
+  //~--- get methods ----------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param pluginDirectory
+   *
+   * @return
+   */
+  public static File getChecksumFile(File pluginDirectory)
+  {
+    return new File(pluginDirectory, PluginConstants.FILE_CHECKSUM);
+  }
+
+  //~--- inner classes --------------------------------------------------------
+
+  /**
+   * Class description
+   *
+   *
+   * @version        Enter version here..., 14/06/05
+   * @author         Enter your name here...
+   */
+  private static class Unwrap implements Function<PluginWrapper, Plugin>
+  {
+
+    /**
+     * Method description
+     *
+     *
+     * @param wrapper
+     *
+     * @return
+     */
+    @Override
+    public Plugin apply(PluginWrapper wrapper)
+    {
+      return wrapper.getPlugin();
+    }
+  }
+}