1 files changed, 55 insertions, 0 deletions
diff --git a/RGens/src/main/java/bjc/rgens/parser/RGrammars.java b/RGens/src/main/java/bjc/rgens/parser/RGrammars.java
new file mode 100644
index 0000000..69cca0d
--- /dev/null
+++ b/RGens/src/main/java/bjc/rgens/parser/RGrammars.java
@@ -0,0 +1,55 @@
+package bjc.rgens.parser;
+
+import java.io.IOException;
+import java.net.URISyntaxException;
+import java.net.URI;
+import java.nio.file.FileSystem;
+import java.nio.file.FileSystems;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Get access to the included grammars.
+ *
+ * @author Ben Culkin
+ */
+public class RGrammars {
+	private static RGrammarSet gramSet;
+
+	private static void loadSet() {
+		try {
+			URI rsc = RGrammarTest.class.getResource("/server-config-sample.cfg").toURI();
+
+			Map<String, String> env = new HashMap<>();
+			env.put("create", "true");
+			FileSystem zipfs = FileSystems.newFileSystem(rsc, env);
+
+			Path cfgPath = Paths.get(rsc);
+
+			gramSet = RGrammarSet.fromConfigFile(cfgPath);
+		} catch (IOException | URISyntaxException ex) {
+			RuntimeException rtex = new RuntimeException("Could not load grammars");
+
+			rtex.initCause(ex);
+
+			throw rtex;
+		}
+	}
+
+	public static String generateExport(String exportName) throws GrammarException {
+		if(gramSet == null) loadSet();
+
+		if(!gramSet.getExportedRules().contains(exportName)) {
+			throw new GrammarException(String.format("No built-in rule named %s", exportName));
+		}
+
+		RGrammar gram = gramSet.getExportSource(exportName);
+
+		String res = gram.generate(exportName);
+		if(exportName.contains("+")) res = res.replaceAll("\\s+", "");
+
+		return res;
+	}
+}