--- /dev/null
+/*
+ Copyright 2011 frank asseg
+
+ 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.
+
+ */
+package de.congrace.exp4j;
+
+/**
+ * Exception for handling unknown Functions.
+ *
+ * @see FunctionToken
+ * @author fas@congrace.de
+ */
+public class UnknownFunctionException extends Exception {
+ private static final long serialVersionUID = 1L;
+
+ /**
+ * construct a new {@link UnknownFunctionException}
+ *
+ * @param functionName
+ * the function name which could not be found
+ */
+ public UnknownFunctionException(String functionName) {
+ super("Unknown function: " + functionName);
+ }
+}