Github user kinow commented on a diff in the pull request:
https://github.com/apache/jena/pull/455#discussion_r207735246
--- Diff:
jena-arq/src/main/java/org/apache/jena/riot/lang/extra/javacc/TokenMgrError.java
---
@@ -0,0 +1,165 @@
+/* Generated By:JavaCC: Do not edit this line. TokenMgrError.java Version
6.0 */
+/* JavaCCOptions: */
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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.
+ */
+
+package org.apache.jena.riot.lang.extra.javacc;
+
+/** Token Manager Error. */
+public class TokenMgrError extends Error
+{
+
+ /**
+ * The version identifier for this Serializable class.
+ * Increment only if the <i>serialized</i> form of the
+ * class changes.
+ */
+ private static final long serialVersionUID = 1L;
+
+ /*
+ * Ordinals for various reasons why an Error of this type can be thrown.
+ */
+
+ /**
+ * Lexical error occurred.
+ */
+ static final int LEXICAL_ERROR = 0;
+
+ /**
+ * An attempt was made to create a second instance of a static token
manager.
+ */
+ static final int STATIC_LEXER_ERROR = 1;
+
+ /**
+ * Tried to change to an invalid lexical state.
+ */
+ static final int INVALID_LEXICAL_STATE = 2;
+
+ /**
+ * Detected (and bailed out of) an infinite loop in the token manager.
+ */
+ static final int LOOP_DETECTED = 3;
+
+ /**
+ * Indicates the reason why the exception is thrown. It will have
+ * one of the above 4 values.
+ */
+ int errorCode;
+
+ /**
+ * Replaces unprintable characters by their escaped (or unicode escaped)
+ * equivalents in the given string
+ */
+ protected static final String addEscapes(String str) {
+ StringBuffer retval = new StringBuffer();
--- End diff --
See comment above about `StringBuffer` / `StringBuilder`
---
