1 files changed, 94 insertions, 0 deletions
diff --git a/BJC-Utils2/src/main/java/bjc/utils/cli/fds/FDSMode.java b/BJC-Utils2/src/main/java/bjc/utils/cli/fds/FDSMode.java
new file mode 100644
index 0000000..acdcbcb
--- /dev/null
+++ b/BJC-Utils2/src/main/java/bjc/utils/cli/fds/FDSMode.java
@@ -0,0 +1,94 @@
+package bjc.utils.cli.fds;
+
+import bjc.utils.cli.CommandHelp;
+import bjc.utils.cli.NullHelp;
+
+/**
+ * A collection of related FDS commands.
+ * 
+ * @author bjculkin
+ *
+ * @param <S>
+ *                The FDS state type.
+ */
+public interface FDSMode<S> {
+	/**
+	 * Get all the characters that are registered to something in this mode.
+	 * 
+	 * In this context, something means a command or submode.
+	 * 
+	 * @return All of the characters registered to something in this mode.
+	 */
+	char[] registeredChars();
+
+	/*
+	 * Check for the existence of commands/submodes.
+	 */
+
+	/**
+	 * Check if there is a command registered to the given character.
+	 * 
+	 * @param c
+	 *                The character to check
+	 * 
+	 * @return Whether or not there is a command bound to that character.
+	 */
+	boolean hasCommand(char c);
+
+	/**
+	 * Check if there is a submode registered to the given character.
+	 * 
+	 * @param c
+	 *                The character to check
+	 * 
+	 * @return Whether or not there is a submode bound to that character.
+	 */
+	boolean hasSubmode(char c);
+
+	/*
+	 * Get commands and submodes.
+	 */
+
+	/**
+	 * Get the command attached to a given character.
+	 * 
+	 * @param c
+	 *                The character to get the command for.
+	 * 
+	 * @return The command bound to that character.
+	 * 
+	 * @throws FDSException
+	 *                 If there is no command bound to that character.
+	 */
+	FDSCommand<S> getCommand(char c) throws FDSException;
+
+	/**
+	 * Get the command attached to a given character.
+	 * 
+	 * @param c
+	 *                The character to get the command for.
+	 * 
+	 * @return The command bound to that character.
+	 * 
+	 * @throws FDSException
+	 *                 If there is no command bound to that character.
+	 */
+	FDSMode<S> getSubmode(char c) throws FDSException;
+
+	/*
+	 * Help utilities
+	 */
+	/**
+	 * Get the help for what's bound to a character.
+	 * 
+	 * This should be one line.
+	 * 
+	 * @param c
+	 *                The character to look at the help for.
+	 * 
+	 * @return The help for what's bound to the character.
+	 */
+	default CommandHelp getHelp(char c) {
+		return new NullHelp();
+	}
+}