FORGE-1375: Need a touch command

shell/impl/src/main/java/org/jboss/forge/addon/shell/commands/TouchCommand.java

@@ -0,0 +1,93 @@
+/**
+ * Copyright 2013 Red Hat, Inc. and/or its affiliates.
+ *
+ * Licensed under the Eclipse Public License version 1.0, available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ */
+
+package org.jboss.forge.addon.shell.commands;
+
+import java.io.File;
+import java.util.List;
+
+import javax.inject.Inject;
+
+import org.jboss.forge.addon.resource.DirectoryResource;
+import org.jboss.forge.addon.resource.FileResource;
+import org.jboss.forge.addon.resource.Resource;
+import org.jboss.forge.addon.resource.ResourceFactory;
+import org.jboss.forge.addon.shell.ui.AbstractShellCommand;
+import org.jboss.forge.addon.shell.ui.ShellContext;
+import org.jboss.forge.addon.shell.util.PathspecParser;
+import org.jboss.forge.addon.ui.context.UIBuilder;
+import org.jboss.forge.addon.ui.context.UIContext;
+import org.jboss.forge.addon.ui.context.UIExecutionContext;
+import org.jboss.forge.addon.ui.hints.InputType;
+import org.jboss.forge.addon.ui.input.UIInputMany;
+import org.jboss.forge.addon.ui.metadata.UICommandMetadata;
+import org.jboss.forge.addon.ui.metadata.WithAttributes;
+import org.jboss.forge.addon.ui.result.Result;
+import org.jboss.forge.addon.ui.result.Results;
+import org.jboss.forge.addon.ui.util.Metadata;
+
+/**
+ * Implementation of the "touch" command
+ * 
+ * @author <a href="mailto:lincolnbaxter@gmail.com">Lincoln Baxter, III</a>
+ */
+public class TouchCommand extends AbstractShellCommand
+{
+   @Inject
+   ResourceFactory resourceFactory;
+
+   @Inject
+   @WithAttributes(label = "Arguments", type = InputType.FILE_PICKER, required = true)
+   private UIInputMany<String> arguments;
+
+   @Override
+   public UICommandMetadata getMetadata(UIContext context)
+   {
+      return Metadata.from(super.getMetadata(context), getClass()).name("touch")
+               .description("Create a new directory.");
+   }
+
+   @Override
+   public void initializeUI(UIBuilder builder) throws Exception
+   {
+      builder.add(arguments);
+   }
+
+   @Override
+   public Result execute(UIExecutionContext context) throws Exception
+   {
+      Resource<?> currentResource = (Resource<?>) context.getUIContext().getInitialSelection().get();
+      for (String path : arguments.getValue())
+      {
+         List<Resource<?>> resources = new PathspecParser(resourceFactory, currentResource, path).resolve();
+         for (Resource<?> resource : resources)
+         {
+            if (resource.exists())
+            {
+               return Results.fail(path + ": Resource already exists.");
+            }
+            else
+            {
+               @SuppressWarnings("unchecked")
+               FileResource<?> file = resourceFactory.create(FileResource.class,
+                        new File(resource.getFullyQualifiedName()));
+
+               if (!file.createNewFile())
+                  return Results.fail(path + ": File could not be created.");
+            }
+         }
+      }
+
+      return Results.success();
+   }
+
+   @Override
+   public boolean isEnabled(ShellContext context)
+   {
+      return super.isEnabled(context) && context.getInitialSelection().get() instanceof DirectoryResource;
+   }
+}