added provider for freemarker templates

scm-plugin-backend/pom.xml

@@ -33,6 +33,12 @@
       <scope>provided</scope>
     </dependency>
 
+    <dependency>
+      <groupId>org.freemarker</groupId>
+      <artifactId>freemarker</artifactId>
+      <version>${freemarker.version}</version>
+    </dependency>
+
     <dependency>
       <groupId>sonia.scm</groupId>
       <artifactId>scm-core</artifactId>

scm-plugin-backend/src/main/java/sonia/scm/plugin/rest/FreemarkerTemplateProvider.java

@@ -0,0 +1,150 @@
+/**
+ * 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.rest;
+
+//~--- non-JDK imports --------------------------------------------------------
+
+import freemarker.template.Configuration;
+import freemarker.template.Template;
+import freemarker.template.TemplateException;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import com.sun.jersey.api.container.ContainerException;
+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.OutputStreamWriter;
+
+import javax.servlet.ServletContext;
+
+import javax.ws.rs.core.Context;
+import javax.ws.rs.core.UriInfo;
+import javax.ws.rs.ext.Provider;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+@Provider
+public class FreemarkerTemplateProvider implements ViewProcessor<String>
+{
+
+  /** Field description */
+  public static final String DIRECTORY_TEMPLATES = "/";
+
+  /** Field description */
+  private static final String EXTENSION = ".ftl";
+
+  //~--- constructors ---------------------------------------------------------
+
+  /**
+   * Constructs ...
+   *
+   *
+   * @param servletContext
+   */
+  public FreemarkerTemplateProvider(@Context ServletContext servletContext)
+  {
+    configuration = new Configuration();
+    configuration.setServletContextForTemplateLoading(servletContext,
+            DIRECTORY_TEMPLATES);
+  }
+
+  //~--- methods --------------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param path
+   *
+   * @return
+   */
+  @Override
+  public String resolve(String path)
+  {
+    if (!path.endsWith(EXTENSION))
+    {
+      path = path.concat(EXTENSION);
+    }
+
+    return path;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   *
+   * @param resolvedPath
+   * @param viewable
+   * @param out
+   *
+   * @throws IOException
+   */
+  @Override
+  public void writeTo(String resolvedPath, Viewable viewable, OutputStream out)
+          throws IOException
+  {
+
+    // Commit the status and headers to the HttpServletResponse
+    out.flush();
+
+    final Template template = configuration.getTemplate(resolvedPath);
+
+    try
+    {
+      template.process(viewable.getModel(), new OutputStreamWriter(out));
+    }
+    catch (TemplateException te)
+    {
+      throw new ContainerException(te);
+    }
+  }
+
+  //~--- fields ---------------------------------------------------------------
+
+  /** Field description */
+  private final Configuration configuration;
+
+  /** Field description */
+  private String basePath;
+
+  /** Field description */
+  private @Context
+  UriInfo uriInfo;
+}