G'day,
I appear to have resolved this issue that I kept running into with the
Jasper Reports plugin...
If I have an action defined as:
<action name="foo_*" method="{1}" class="com.xxx.foo">
<result name="success" type="jasper">
<param name="location">WEB-INF/foo.jasper</param>
<param name="format">${contentType}</param>
<param name="dataSource">dataSource</param>
<param name="imageServletUrl">/servlets/image?image=</param>
</result>
</action>
Using the Jasper Reports plugin that ships with S2 current, I get:
16:02:13,220 WARN [OgnlUtil] Caught OgnlException while setting
property 'imageServletUrl' on type
'org.apache.struts2.views.jasperreports.JasperReportsResult'.
java.lang.IllegalAccessException: Class ognl.OgnlRuntime can not access
a member of class
org.apache.struts2.views.jasperreports.JasperReportsResult with
modifiers "protected"
at sun.reflect.Reflection.ensureMemberAccess(Reflection.java:65)
at java.lang.reflect.Field.doSecurityCheck(Field.java:960)
at java.lang.reflect.Field.getFieldAccessor(Field.java:896)
at java.lang.reflect.Field.set(Field.java:657)
at ognl.OgnlRuntime.setFieldValue(OgnlRuntime.java:1140)
...
And the imageServletUrl param does not take effect.
The issue appears to be that all of the setters in JasperReportsResult
return a JasperReportsResult. The JavaBeans spec identifies that the
setter for a simple property must return void. As a result,
BeanInfo.getPropertyDescriptors won't see these setters as write methods
for properties. With the other props in this class, that's not a
problem - since they don't have getters, we don't get any
propertyDescriptors for the properties, and proceed to look for methods
individually (OgnlRuntime.java:1296). For imageServletUrl, however,
there _is_ a valid getter. BeanInfo sees this as a read-only prop and
returns a property descriptor for it, showing exactly that. Back in
OGNL code, we see that we got a PropertyDescriptor, and don't bother
asking for all methods. getSetMethod says "I don't have a set method,"
so OGNL eventually tries to just poke the field, resulting in the above
error because the field is protected.
Solution: modify the setters in JasperReportsResult to return void.
This has been confirmed to fix the above problem.
PK
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