initial drop of scm-cli-client

scm-clients/scm-cli-client/src/main/java/sonia/scm/cli/SubCommandHandler.java

@@ -0,0 +1,200 @@
+/**
+ * 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.cli;
+
+//~--- non-JDK imports --------------------------------------------------------
+
+import org.kohsuke.args4j.CmdLineException;
+import org.kohsuke.args4j.CmdLineParser;
+import org.kohsuke.args4j.OptionDef;
+import org.kohsuke.args4j.spi.OptionHandler;
+import org.kohsuke.args4j.spi.Parameters;
+import org.kohsuke.args4j.spi.Setter;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import sonia.scm.util.IOUtil;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+public class SubCommandHandler extends OptionHandler<SubCommand>
+{
+
+  /** Field description */
+  public static final String RESOURCE_SERVICES =
+    "META-INF/services/".concat(SubCommand.class.getName());
+
+  /** the logger for SubCommandHandler */
+  private static final Logger logger =
+    LoggerFactory.getLogger(SubCommandHandler.class);
+
+  //~--- constructors ---------------------------------------------------------
+
+  /**
+   * Constructs ...
+   *
+   *
+   * @param parser
+   * @param option
+   * @param setter
+   */
+  public SubCommandHandler(CmdLineParser parser, OptionDef option,
+                           Setter<? super SubCommand> setter)
+  {
+    super(parser, option, setter);
+    subCommands = new HashMap<String, CommandDescriptor>();
+    loadSubCommands();
+  }
+
+  //~--- methods --------------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param prmtrs
+   *
+   * @return
+   *
+   * @throws CmdLineException
+   */
+  @Override
+  public int parseArguments(Parameters parameters) throws CmdLineException
+  {
+    String name = parameters.getParameter(0);
+    CommandDescriptor desc = subCommands.get(name);
+    if ( desc != null )
+    {
+      // owner.stopOptionParsing();
+      setter.addValue( desc.createSubCommand() );
+    } 
+    else 
+    {
+      throw new CmdLineException(owner, "command ".concat(name).concat(" not found"));
+    }
+    return 1;
+  }
+
+  //~--- get methods ----------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  @Override
+  public String getDefaultMetaVariable()
+  {
+    throw new UnsupportedOperationException("Not supported yet.");
+  }
+
+  //~--- methods --------------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   */
+  private void loadSubCommands()
+  {
+    BufferedReader reader = null;
+
+    try
+    {
+      reader = new BufferedReader(
+          new InputStreamReader(
+              getClass().getResourceAsStream(RESOURCE_SERVICES)));
+
+      String line = reader.readLine();
+
+      while (line != null)
+      {
+        parseLine(line);
+        line = reader.readLine();
+      }
+    }
+    catch (IOException ex)
+    {
+      logger.error("could not load commands");
+    }
+    finally
+    {
+      IOUtil.close(reader);
+    }
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param line
+   */
+  private void parseLine(String line)
+  {
+    line = line.trim();
+
+    if (!line.startsWith("#"))
+    {
+      try
+      {
+        Class<? extends SubCommand> clazz =
+          (Class<? extends SubCommand>) Class.forName(line);
+        CommandDescriptor desc = new CommandDescriptor(clazz);
+
+        subCommands.put(desc.getName(), desc);
+      }
+      catch (ClassNotFoundException ex)
+      {
+        logger.warn("could not found command class {}", line);
+      }
+    }
+  }
+
+  //~--- fields ---------------------------------------------------------------
+
+  /** Field description */
+  private Map<String, CommandDescriptor> subCommands;
+}