Github user necouchman commented on a diff in the pull request:
https://github.com/apache/guacamole-client/pull/345#discussion_r241928458
--- Diff:
extensions/guacamole-auth-ldap/src/main/java/org/apache/guacamole/auth/ldap/conf/LdapFilterGuacamoleProperty.java
---
@@ -0,0 +1,53 @@
+/*
+ * 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.guacamole.auth.ldap.conf;
+
+import java.text.ParseException;
+import org.apache.directory.api.ldap.model.filter.ExprNode;
+import org.apache.directory.api.ldap.model.filter.FilterParser;
+import org.apache.guacamole.GuacamoleException;
+import org.apache.guacamole.GuacamoleServerException;
+import org.apache.guacamole.properties.GuacamoleProperty;
+
+/**
+ * A GuacamoleProperty with a value of an ExprNode query filter. The
string
+ * provided is passed through the FilterParser returning the ExprNode
object,
+ * or an exception is thrown if the filter is invalid and cannot be
correctly
+ * parsed.
+ */
+public abstract class LdapFilterGuacamoleProperty implements
GuacamoleProperty<ExprNode> {
+
+ @Override
+ public ExprNode parseValue(String value) throws GuacamoleException {
+
+ // No value provided, so return null.
+ if (value == null)
+ return null;
+
+ try {
+ return FilterParser.parse(value);
+ }
+ catch (ParseException e) {
+ throw new GuacamoleServerException("Error parsing filter", e);
--- End diff --
Reworded.
---
