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https://issues.apache.org/jira/browse/FREEMARKER-177?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17289449#comment-17289449
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Dániel Dékány commented on FREEMARKER-177:
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Unfortunately it doesn't matter much if for how long something is deprecated.
Removing it is still not backward compatible. So, we going to have to figure
out something else.
First of all, it would help to know what Spring is doing there and why. See,
java.bean.Introspector doesn't fail, and its says that the type of the
"settings" property is Map (the common ancestor class of Map and Properties),
in all Java versions I tried (8, 9, 11, 13). But then Spring calls
java.beans.PropertyDescriptor.setReadMethod(PropertyDescriptor.java:257), and
that's when the problem happens. Why leads Spring to do that?
For extra fun, setSettings has an additional overload, where the parameter is
an InputStream.
It's also surprising that after 10+ years this suddenly comes up. Could it be
that only certain version of Spring does this? Is that a new version?
> freemarker Configurable has a asymmetric settings get/set which causes spring
> failure
> -------------------------------------------------------------------------------------
>
> Key: FREEMARKER-177
> URL: https://issues.apache.org/jira/browse/FREEMARKER-177
> Project: Apache Freemarker
> Issue Type: Bug
> Affects Versions: 2.3.29
> Reporter: Gray
> Priority: Major
> Attachments: trace.txt
>
>
> When I try to configure freemarker.template.Configuration in spring, it
> throws the exception:
> {{Caused by: org.springframework.beans.FatalBeanException: Failed to obtain
> BeanInfo for class [freemarker.template.Configuration]; nested exception is
> java.beans.IntrospectionException: type mismatch between read and write
> methods}}
> The problem is that setSettings(...) takes a Properties and getSettings()
> returns a Map. The get has been deprecated forever. Can it please be
> fixed? The alternative is having to do some spring hackery.
> See: [https://github.com/apache/freemarker/pull/74]
>
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