start implementation of isolated classloaders

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

@@ -0,0 +1,106 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+
+
+package sonia.scm.plugin;
+
+//~--- non-JDK imports --------------------------------------------------------
+
+import com.google.common.base.Function;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Iterables;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import java.io.IOException;
+
+import java.nio.file.Path;
+
+import java.util.Set;
+
+import javax.servlet.ServletContext;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+public final class Plugins
+{
+
+  /** Field description */
+  private static final String CONTEXT_VAR = "sonia.scm.plugins";
+
+  //~--- constructors ---------------------------------------------------------
+
+  /**
+   * Constructs ...
+   *
+   */
+  private Plugins() {}
+
+  //~--- 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 wrapped
+   *
+   * @return
+   */
+  public static Iterable<Plugin> unwrap(Iterable<PluginWrapper> wrapped)
+  {
+    return Iterables.transform(wrapped, new Unwrap());
+  }
+
+  //~--- 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();
+    }
+  }
+}