Thorsten Meinl created XMLBEANS-491:
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Summary: SystemProperties cannot handle default values
Key: XMLBEANS-491
URL: https://issues.apache.org/jira/browse/XMLBEANS-491
Project: XMLBeans
Issue Type: Bug
Components: Tools
Affects Versions: Version 2.5
Reporter: Thorsten Meinl
The SystemProperties class seems to be a wrapper around System.getProperties.
However, System.getProperties() returns a Properties object that has preferred
methods of querying properties, e.g. getProperty() instead of simply get()
inherited from Hashtable. getProperty() also queries (recursively) the defaults
stored in the Properties objects, which get() doesn't. The SystemProperties
wrapper incorrectly calls only get which ignores the default values.
Suppose some class changes the system properties by wrapping them into a new
Properties object (passing the old values as defaults in the constructor) and
setting it via System.setProperties. Everyone using getProperty() still sees
the old values, whereas calling only get only the new values are shown. This
means that all standard java properties (e.g. "user.dir" used in the
SchemaCompiler) are lost when they are queried via SystemProperties,
essentially leading to strange NullPointerExceptions when the ant task is used.
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