Cannot serialize objects to JSON in plugins

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 5.1 EE SP3 (5.1.6), 5.2 EE SP1 (5.2.5)
• Fix Version/s: 5.1 EE SP4 (5.1.7), 5.2 EE SP2 (5.2.6)
• Component/s: Legacy Components > API
• Labels:
  • 5.2_release_notes
• Environment: All

A classCastException may occur when serializing objects to JSON in a plugin (or more specifically, objects not accessible to portal-impl.jar).

To address this issue, com.liferay.util.json.JSONFactoryUtil has been added to util-java.jar. This new class should be used if the class that is serialized is not available to portal-impl.jar. For classes that are available to portal-impl.jar, the existing com.liferay.portal.kernel.json.JSONFactoryUtil can still be used.