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Avoid 'type mismatch' errors in ExtendedBeanInfo
Prior to this commit, ExtendedBeanInfo would add non-indexed write methods without consideration for the presence of indexed read/write methods, which is invalid per the JavaBeans spec and per the behavior of java.beans.Introspector. That is, a method with the signature void setFoo(Foo foo) Should never be registered as a write method if the following method signature is also present in the class void setFoo(int i, Foo foo) In most cases, this oversight caused no problems, but in certain situations where a bean actually contains such a mismatch of methods, "type mismatch" errors were thrown when ExtendedBeanInfo attempted the illegal addition against the underlying property descriptor. The implementation is now more careful about checking the parameter type of write methods -- if the property descriptor in question is an IndexedPropertyDescriptor, i.e. has an indexed write method, then any non-indexed write method candidate must have a single *array* parameter, which conforms to the spec and to Introspector behavior. Issue: SPR-8937
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