added hook feature class for supported checks

scm-core/src/main/java/sonia/scm/repository/api/HookContext.java

@@ -39,6 +39,9 @@ import sonia.scm.repository.Repository;
 import sonia.scm.repository.spi.HookContextProvider;
 
 /**
+ * The context for all repository hooks. With the {@link HookContext} class it
+ * is able to send messages back to the client and retrieve {@link Changeset}s
+ * which are added during this push/commit.
  *
  * @author Sebastian Sdorra
  * @since 1.33
@@ -65,7 +68,7 @@ public final class HookContext
   //~--- get methods ----------------------------------------------------------
 
   /**
-   * Returns a {@link HookChangesetBuilder} which is able to return all 
+   * Returns a {@link HookChangesetBuilder} which is able to return all
    * {@link Changeset}'s during this push/commit.
    *
    *
@@ -97,6 +100,19 @@ public final class HookContext
     return provider.getMessageProvider();
   }
 
+  /**
+   * Returns true if the underlying provider support the requested feature.
+   *
+   *
+   * @param feature feature to check if it is supported
+   *
+   * @return true if the feature is supported
+   */
+  public boolean isFeatureSupported(HookFeature feature)
+  {
+    return provider.getSupportedFeatures().contains(feature);
+  }
+
   //~--- fields ---------------------------------------------------------------
 
   /** Field description */

scm-core/src/main/java/sonia/scm/repository/api/HookFeature.java

@@ -0,0 +1,40 @@
+/**
+ * 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.repository.api;
+
+/**
+ * Enumeration of available hook features.
+ *
+ * @author Sebastian Sdorra
+ * @since 1.33
+ */
+public enum HookFeature { MESSAGE_PROVIDER, CHANGESET_PROVIDER; }

scm-core/src/main/java/sonia/scm/repository/spi/HookContextProvider.java

@@ -33,8 +33,13 @@ package sonia.scm.repository.spi;
 
 //~--- non-JDK imports --------------------------------------------------------
 
+import sonia.scm.repository.api.HookFeature;
 import sonia.scm.repository.api.HookMessageProvider;
 
+//~--- JDK imports ------------------------------------------------------------
+
+import java.util.Set;
+
 /**
  *
  * @author Sebastian Sdorra
@@ -61,6 +66,14 @@ public abstract class HookContextProvider
     return createMessageProvider();
   }
 
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  public abstract Set<HookFeature> getSupportedFeatures();
+
   /**
    * Method description
    *
@@ -78,7 +91,8 @@ public abstract class HookContextProvider
    * Method description
    *
    */
-  void handleClientFinalization() {
+  void handleClientFinalization()
+  {
     clientFinalization = true;
   }
 

scm-plugins/scm-git-plugin/src/main/java/sonia/scm/repository/spi/GitHookContextProvider.java

@@ -38,11 +38,14 @@ import org.eclipse.jgit.transport.ReceivePack;
 
 import sonia.scm.repository.RepositoryHookType;
 import sonia.scm.repository.api.GitHookMessageProvider;
+import sonia.scm.repository.api.HookFeature;
 import sonia.scm.repository.api.HookMessageProvider;
 
 //~--- JDK imports ------------------------------------------------------------
 
+import java.util.EnumSet;
 import java.util.List;
+import java.util.Set;
 
 /**
  *
@@ -51,6 +54,12 @@ import java.util.List;
 public class GitHookContextProvider extends HookContextProvider
 {
 
+  /** Field description */
+  private static final Set<HookFeature> SUPPORTED_FEATURES =
+    EnumSet.of(HookFeature.MESSAGE_PROVIDER, HookFeature.CHANGESET_PROVIDER);
+
+  //~--- constructors ---------------------------------------------------------
+
   /**
    * Constructs ...
    *
@@ -67,6 +76,20 @@ public class GitHookContextProvider extends HookContextProvider
     this.type = type;
   }
 
+  //~--- methods --------------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  @Override
+  public HookMessageProvider createMessageProvider()
+  {
+    return new GitHookMessageProvider(receivePack);
+  }
+
   //~--- get methods ----------------------------------------------------------
 
   /**
@@ -88,9 +111,9 @@ public class GitHookContextProvider extends HookContextProvider
    * @return
    */
   @Override
-  public HookMessageProvider createMessageProvider()
+  public Set<HookFeature> getSupportedFeatures()
   {
-    return new GitHookMessageProvider(receivePack);
+    return SUPPORTED_FEATURES;
   }
 
   //~--- fields ---------------------------------------------------------------