[GUACAMOLE-497] Ensure guacamole-client source is compatible with Java 9

• Type: Task
• Status: Resolved
• Priority: Major
• Resolution: Done
• Fix Version/s: 1.0.0
• Component/s: guacamole-client
• Assignee: Mike Jumper
• Reporter: Mike Jumper
• Created: 01/Feb/18 23:55
• Updated: 02/Feb/18 17:31
• Resolved: 02/Feb/18 17:31

Description

guacamole-client is intended to be compatible at a source level with Java 6 and later (though some Maven plugins require at least a version 7 JRE), however a number of functions and classes have been deprecated as of Java 9, resulting in warnings and a failed build:

• Wrapper class constructors new Integer(String) and new Long(String) have been deprecated in favor of Integer.valueOf(String) and Long.valueOf(String).
• The XMLReaderFactory class used to parse user-mapping.xml has been deprecated in favor of SAXParserFactory.

Migrating away from the old functions and classes should be safe, as they have been defined since at least Java 6:

• SAXParserFactory.newInstance(),
  SAXParserFactory.newSAXParser(), and SAXParser.parse()
• Integer.valueOf(String)
• Long.valueOf(String)