@Override
	public void execute(String commandName, BufferedReader reader, BufferedWriter writer)
			throws Py4JException, IOException {
		char subCommand = safeReadLine(reader).charAt(0);
		String returnCommand = null;

		if (subCommand == CREATE_VIEW_SUB_COMMAND_NAME) {
			returnCommand = createJVMView(reader);
		} else if (subCommand == IMPORT_SUB_COMMAND_NAME) {
			returnCommand = doImport(reader);
		} else if (subCommand == REMOVE_IMPORT_SUB_COMMAND_NAME) {
			returnCommand = removeImport(reader);
		} else if (subCommand == SEARCH_SUB_COMMAND_NAME) {
			returnCommand = search(reader);
		} else {
			returnCommand = Protocol.getOutputErrorCommand("Unknown JVM View SubCommand Name: " + subCommand);
		}
		logger.finest("Returning command: " + returnCommand);
		writer.write(returnCommand);
		writer.flush();
	}
@Test
	public void testSubCommands() {
		String inputCommand1 = JVMViewCommand.CREATE_VIEW_SUB_COMMAND_NAME + "\n" + "custom" + "\ne\n";
		String inputCommand2 = JVMViewCommand.IMPORT_SUB_COMMAND_NAME + "\nro0\n" + "java.util.*" + "\ne\n";
		String inputCommand3 = JVMViewCommand.IMPORT_SUB_COMMAND_NAME + "\nro0\n" + "java.io.File" + "\ne\n";
		String inputCommand4 = JVMViewCommand.REMOVE_IMPORT_SUB_COMMAND_NAME + "\nro0\n" + "java.io.File" + "\ne\n";
		String inputCommand5 = JVMViewCommand.REMOVE_IMPORT_SUB_COMMAND_NAME + "\nro0\n" + "java.lang.*" + "\ne\n";
		String inputCommand6 = JVMViewCommand.IMPORT_SUB_COMMAND_NAME + "\nrj\n" + "java.util.*" + "\ne\n";
		try {
			command.execute("r", new BufferedReader(new StringReader(inputCommand1)), writer);
			assertEquals("!yro0\n", sWriter.toString());
			JVMView view = (JVMView) gateway.getObject("o0");

			command.execute("r", new BufferedReader(new StringReader(inputCommand2)), writer);
			assertEquals("!yro0\n!yv\n", sWriter.toString());
			assertEquals(2, view.getStarImports().size()); // 1 for java.lang, 1
															// for java.util
			assertTrue(view.getStarImports().contains("java.util"));

			command.execute("r", new BufferedReader(new StringReader(inputCommand3)), writer);
			assertEquals("!yro0\n!yv\n!yv\n", sWriter.toString());
			assertTrue(view.getSingleImportsMap().containsKey("File"));
			assertEquals(1, view.getSingleImportsMap().size()); // 1 for
																// java.io.File

			// Duplicate
			command.execute("r", new BufferedReader(new StringReader(inputCommand2)), writer);
			assertEquals("!yro0\n!yv\n!yv\n!yv\n", sWriter.toString());
			assertEquals(2, view.getStarImports().size());

			command.execute("r", new BufferedReader(new StringReader(inputCommand3)), writer);
			assertEquals("!yro0\n!yv\n!yv\n!yv\n!yv\n", sWriter.toString());
			assertTrue(view.getSingleImportsMap().containsKey("File"));
			assertEquals(1, view.getSingleImportsMap().size()); // 1 for
																// java.io.File

			command.execute("r", new BufferedReader(new StringReader(inputCommand4)), writer);
			assertEquals("!yro0\n!yv\n!yv\n!yv\n!yv\n!ybtrue\n", sWriter.toString());
			assertFalse(view.getSingleImportsMap().containsKey("File"));
			assertEquals(0, view.getSingleImportsMap().size()); // 1 for
																// java.io.File

			command.execute("r", new BufferedReader(new StringReader(inputCommand4)), writer);
			assertEquals("!yro0\n!yv\n!yv\n!yv\n!yv\n!ybtrue\n!ybfalse\n", sWriter.toString());
			assertFalse(view.getSingleImportsMap().containsKey("File"));
			assertEquals(0, view.getSingleImportsMap().size()); // 1 for
																// java.io.File

			command.execute("r", new BufferedReader(new StringReader(inputCommand5)), writer);
			assertEquals("!yro0\n!yv\n!yv\n!yv\n!yv\n!ybtrue\n!ybfalse\n!ybtrue\n", sWriter.toString());
			assertFalse(view.getStarImports().contains("java.lang.*"));
			assertEquals(1, view.getStarImports().size()); // 1 for java.io.File

			command.execute("r", new BufferedReader(new StringReader(inputCommand5)), writer);
			assertEquals("!yro0\n!yv\n!yv\n!yv\n!yv\n!ybtrue\n!ybfalse\n!ybtrue\n!ybfalse\n", sWriter.toString());
			assertFalse(view.getStarImports().contains("java.lang.*"));
			assertEquals(1, view.getStarImports().size()); // 1 for java.io.File

			command.execute("r", new BufferedReader(new StringReader(inputCommand6)), writer);
			assertEquals("!yro0\n!yv\n!yv\n!yv\n!yv\n!ybtrue\n!ybfalse\n!ybtrue\n!ybfalse\n!yv\n", sWriter.toString());
			assertFalse(gateway.getDefaultJVMView().getStarImports().contains("java.util.*"));
			assertEquals(2, gateway.getDefaultJVMView().getStarImports().size()); // 1
																					// for
																					// java.io.File
		} catch (Exception e) {
			e.printStackTrace();
			fail();
		}
	}