[PLUTO-506] Invoking the store() method of PortletPreferences object results in NPE if no preferences declared in portlet.xml

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0-refactoring, 2.0.0
• Fix Version/s: 2.0-refactoring, 2.0.0
• Component/s: portlet container
• Environment: JDK 1.5.0_16, Tomcat 5.5.27
• Assignee: Unassigned
• Reporter: Brian DeHamer
• Created: 07/Oct/08 16:37
• Updated: 08/Oct/08 07:01
• Resolved: 08/Oct/08 07:01

Description

If you have not declared any preferences for a portlet in the deployment descriptor (portlet.xml) and then invoke the store() method of the PortletPreferences object, a NullPointerException is thrown with the following stack trace:

java.lang.NullPointerException
at org.apache.pluto.internal.PreferencesValidatorRegistry.getPreferencesValidator(PreferencesValidatorRegistry.java:97)
at org.apache.pluto.internal.impl.PortletEntityImpl.getPreferencesValidator(PortletEntityImpl.java:167)
at org.apache.pluto.internal.impl.PortletPreferencesImpl.internalStore(PortletPreferencesImpl.java:298)
at org.apache.pluto.internal.impl.PortletPreferencesImpl.store(PortletPreferencesImpl.java:277) . . .

In the getPreferencesValidator() method of the PreferencesValidatorRegistry the PortletPreferencesDD object is retrieved and its getPreferencesValidator() method is invoked without first checking to see if the PortletPreferencesDD object is null.

As a workaround you can make sure that you always declare at least one preference in your portlet.xml file – this will ensure that the PortletPreferencesDD object is not null.