added support for jersey viewable

scm-webapp/src/main/java/sonia/scm/api/rest/TemplateEngineViewable.java

@@ -0,0 +1,127 @@
+/**
+ * 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.api.rest;
+
+//~--- non-JDK imports --------------------------------------------------------
+
+import com.google.inject.Inject;
+
+import sonia.scm.template.Template;
+import sonia.scm.template.TemplateEngine;
+import sonia.scm.template.TemplateEngineFactory;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import com.sun.jersey.api.view.Viewable;
+import com.sun.jersey.spi.template.ViewProcessor;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.PrintWriter;
+
+import javax.ws.rs.ext.Provider;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+@Provider
+public class TemplateEngineViewable implements ViewProcessor<String>
+{
+
+  /**
+   * Constructs ...
+   *
+   *
+   * @param templateEngineFactory
+   */
+  @Inject
+  public TemplateEngineViewable(TemplateEngineFactory templateEngineFactory)
+  {
+    this.templateEngineFactory = templateEngineFactory;
+  }
+
+  //~--- methods --------------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param name
+   *
+   * @return
+   */
+  @Override
+  public String resolve(String name)
+  {
+    return name;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param path
+   * @param viewable
+   * @param out
+   *
+   * @throws IOException
+   */
+  @Override
+  public void writeTo(String path, Viewable viewable, OutputStream out)
+    throws IOException
+  {
+    TemplateEngine engine = templateEngineFactory.getEngineByExtension(path);
+
+    if (engine == null)
+    {
+      throw new IOException("could not find template engine for ".concat(path));
+    }
+
+    Template template = engine.getTemplate(path);
+
+    if (template == null)
+    {
+      throw new IOException("could not find template for ".concat(path));
+    }
+
+    PrintWriter writer = new PrintWriter(out);
+
+    template.execute(writer, viewable.getModel());
+    writer.flush();
+  }
+
+  //~--- fields ---------------------------------------------------------------
+
+  /** Field description */
+  private TemplateEngineFactory templateEngineFactory;
+}