JDK-7193977 : REGRESSION:Java 7's JavaBeans persistence ignoring the "transient" flag on properties
- Type: Bug
- Component: client-libs
- Sub-Component: java.beans
- Affected Version: 7u6
- Priority: P3
- Status: Resolved
- Resolution: Fixed
- OS: windows_7
- CPU: x86
- Submitted: 2012-08-24
- Updated: 2013-06-26
- Resolved: 2012-09-25
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| JDK 7 | JDK 8 |
|---|---|
7u10Fixed  |
8 b58Fixed |
Description
Java 7's JavaBeans persistence ignoring the "transient" flag on properties
but XMLEncoder is not ignoring "transient".
Rather the JavaBeans Introspector is somehow dropping "transient" from 1 of 2 properties when composing the subclass BeanInfo. In the parent class' BeanInfo "transient" is present on both properties. In the subclass, however, it is only present on 1 of the 2 properties. Java 6 doesn't have this issue.
Have a BeanInfo class, InfoBeanInfo, for a base class, Info, that
marks the CustomDelegateFactory property (any capitalization thereof)
as transient and PropertyDescriptor.setValue( "transient", Boolean.TRUE ).
This is obeyed just fine in testing with the Java 6 Update 34 when
outputting instances of subclasses of Info. This seems to be ignored
by the test JDK provided -- resulting in undesirable output.
Checked Java 7 Update 6 and it also seems to ignore this BeanInfo.
Note that although the classes reside in various packages, they're all in one directory
The test execution is encapsulated in Test.main().
Java 6 Update 34 produces:
INFO (BASE CLASS) TRANSIENT PROPERTIES:
---------------------------------------
customDelegateFactory
customDelegateFactoryClass
SUMMARY (SUB-CLASS) TRANSIENT PROPERTIES:
-----------------------------------------
customDelegateFactory
customDelegateFactoryClass
Java 7 Update 6 produces:
INFO (BASE CLASS) TRANSIENT PROPERTIES:
---------------------------------------
customDelegateFactory
customDelegateFactoryClass
SUMMARY (SUB-CLASS) TRANSIENT PROPERTIES:
-----------------------------------------
customDelegateFactoryClass
Note that 'customDelegateFactory' is transient in the Info class' BeanInfo in both cases, but is not transient in the Summary class' BeanInfo in Java 7.
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