1 files changed, 69 insertions, 0 deletions
diff --git a/src/uk/org/ury/server/protocol/Directive.java b/src/uk/org/ury/server/protocol/Directive.java
new file mode 100644
index 0000000..0d7a162
--- /dev/null
+++ b/src/uk/org/ury/server/protocol/Directive.java
@@ -0,0 +1,69 @@
+/**
+ * 
+ */
+package uk.org.ury.server.protocol;
+
+/**
+ * Directives supported by the protocol.
+ * 
+ * @author  Matt Windsor
+ */
+
+public enum Directive
+  {
+    // ID           String representation  Singleton?
+    
+    /** Directive marking the start of an item block. */ 
+    ITEM_START      ("ITEM-START"        , false),
+    
+    /** Directive marking a property inside an item block. */  
+    ITEM_PROPERTY   ("PROP"              , false),
+    
+    /** Directive marking the end of an item block. */
+    ITEM_END        ("ITEM-END"          , false);
+    
+    
+    
+    private String strRep;        // String representation
+    private boolean isSingleton;  // Is a singleton?
+
+    
+    /**
+     * Construct a new Directive.
+     * 
+     * @param strRep  The string representation of the Directive.
+     * 
+     * @param isSingleton  If true, then the Directive accepts no 
+     *                     properties.  If false, then the Directive 
+     *                     must be provided with at least one.
+     */
+    
+    private
+    Directive (String strRep, boolean isSingleton)
+    {
+      this.strRep = strRep;
+      this.isSingleton = isSingleton;
+    }
+    
+    
+    /**
+     * @return  the string representation.
+     */
+    
+    public String
+    toString ()
+    {
+      return strRep;
+    }
+    
+    
+    /**
+     * @return  true if the directive has no properties.
+     */
+    
+    public Boolean
+    isSingleton ()
+    {
+      return isSingleton;
+    }
+  }