added convienience method to get a parser instance from Occi.g

occi · Mar 11, 2011 · 1fac327 · 1fac327
1 parent f1950dd
commit 1fac327
Showing 1 changed file with 13 additions and 0 deletions.
diff --git a/occi-antlr/Occi.g b/occi-antlr/Occi.g
@@ -35,6 +35,19 @@ options {
   static String occi_core_actionterm = "occi.core.actionterm";
   static String occi_core_self = "occi.core.self";
   static String occi_core_category = "occi.core.category";
+
+  public static OcciParser getParser(String occiHeader) throws Exception {
+
+    CharStream stream = new ANTLRStringStream(occiHeader);
+    OcciLexer lexer = new OcciLexer(stream);
+    CommonTokenStream tokenStream = new CommonTokenStream(lexer);
+    OcciParser parser = new OcciParser(tokenStream);
+
+    if(parser.getNumberOfSyntaxErrors() > 0)
+      throw new Exception("Errors (" + parser.getNumberOfSyntaxErrors() + ") in parsing the input string");
+
+    return parser;
+  }
 }
 
 headers                returns [HashMap values] :