1 files changed, 99 insertions, 0 deletions
diff --git a/sli/common/src/main/java/org/openecomp/sdnc/sli/SvcLogicExpressionFactory.java b/sli/common/src/main/java/org/openecomp/sdnc/sli/SvcLogicExpressionFactory.java
new file mode 100644
index 0000000..e4d82de
--- /dev/null
+++ b/sli/common/src/main/java/org/openecomp/sdnc/sli/SvcLogicExpressionFactory.java
@@ -0,0 +1,99 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * openECOMP : SDN-C
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights
+ *                         reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.sdnc.sli;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+import org.antlr.v4.runtime.ANTLRInputStream;
+import org.antlr.v4.runtime.CharStream;
+import org.antlr.v4.runtime.CommonTokenStream;
+import org.antlr.v4.runtime.tree.ParseTreeWalker;
+import org.openecomp.sdnc.sli.ExprGrammarParser.ExprContext;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+
+public class SvcLogicExpressionFactory {
+	
+	private static final Logger LOG = LoggerFactory
+			.getLogger(SvcLogicExpressionFactory.class);
+
+	
+	public static SvcLogicExpression parse(String exprStr) throws IOException
+	{
+		LOG.debug("parse("+exprStr+")");
+		InputStream exprStream = new ByteArrayInputStream(exprStr.getBytes());
+		CharStream input = new ANTLRInputStream(exprStream);
+		ExprGrammarLexer lexer = new ExprGrammarLexer(input);
+		CommonTokenStream tokens = new CommonTokenStream(lexer);
+		ExprGrammarParser parser = new ExprGrammarParser(tokens);
+
+		lexer.removeErrorListeners();
+		lexer.addErrorListener(SvcLogicExprParserErrorListener.getInstance());		
+		parser.removeErrorListeners();
+		parser.addErrorListener(SvcLogicExprParserErrorListener.getInstance());
+
+		ExprContext expression = null;
+		
+		try {
+			expression = parser.expr();
+		} catch (Exception e) {
+			String errorMsg = e.getMessage();
+			
+			LOG.error(errorMsg);
+			throw new SvcLogicParserException(errorMsg);
+		}
+		
+	
+		ParseTreeWalker walker = new ParseTreeWalker();
+		SvcLogicExprListener listener = new SvcLogicExprListener();
+		walker.walk(listener, expression);
+		
+		
+		return(listener.getParsedExpr());
+	}
+	
+	public static void main(String argv[]) {
+
+
+		System.setProperty(org.slf4j.impl.SimpleLogger.DEFAULT_LOG_LEVEL_KEY, "debug");
+
+		StringBuffer sbuff = new StringBuffer();
+		
+		for (int i = 0 ; i < argv.length ; i++)
+		{
+			if (sbuff.length() > 0)
+			{
+				sbuff.append(" ");
+			}
+			sbuff.append(argv[i]);
+		}
+		
+		try {
+			SvcLogicExpressionFactory.parse(sbuff.toString());
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+	}
+}