Thanks so much for your prompt and clear help. It solved my problem.
If you want help testing on GAE I would be glad to help.
Cheers,
Zebulah
Sent from my iPod
On Nov 22, 2013, at 4:16 AM, Jörg Schaible <joerg.schai...@scalaris.com> wrote:
> Hi Zebulah,
>
> Zfadade wrote:
>
>> Hi,
>>
>> I'm using XStream 1.4.5 and Google App Engine 1.8.8 (and new to both, so
>> my knowledge is limited). I'm getting the exception below. I saw a
>> posting about this problem from a few years ago, but didn't quite
>> understand the solution. Is there a work-around for this?
>
> Actually I thought, I solved the problem with the latest version 1.4.5.
> However, since I have no GAE experience myself and no-one really did a real
> test, I can see now - looking at your stack trace - that my approach did not
> work, GAE works differently than thought.
>
> So all you can currently do is to overload XStream's setupConverter method
> and register the converters required by your application yourself. Simply
> take a copy of the method and strip any converter registration that makes
> problems. You have additionally no requirement to load converters
> dynamically, since you know you're running Java 7. So it will look like:
>
> ============= %< ============
> class XStreamGAE extends XStream {
> ...
> protected void setupConverters() {
> registerConverter(new ReflectionConverter(getMapper(),
> getReflectionProvider()), PRIORITY_VERY_LOW);
> registerConverter(new SerializableConverter(getMapper(),
> getReflectionProvider(), getClassLoaderReference()), PRIORITY_LOW);
> registerConverter(new ExternalizableConverter(getMapper(),
> getClassLoaderReference()), PRIORITY_LOW);
>
> registerConverter(new NullConverter(), PRIORITY_VERY_HIGH);
> registerConverter(new IntConverter(), PRIORITY_NORMAL);
> // ...
> // continue with the rest of required converters, omitting the
> // problematic like FontConverter and TextAttributeConverter
>
>
> // For the dynamic ones you write instead of:
> // ============
> // registerConverterDynamically(
> // "com.thoughtworks.xstream.converters.extended.ThrowableConverter",
> // PRIORITY_NORMAL, new Class[]{ConverterLookup.class},
> // new Object[]{converterLookup});
> // ============
> registerConverter(new ThrowableConverter(), PRIORITY_NORMAL,
> getConverterLookup());
> }
> ...
> }
> ============= %< ============
>
> Sorry for inconvenience, I will try a different approach for next version.
>
> Cheers,
> Jörg
>
>>
>> Thanks,
>>
>> Zebulah
>>
>> java.lang.NoClassDefFoundError: java.awt.font.TextAttribute is a
>> restricted class. Please see the Google App Engine developer's guide for
>> more details. at
>> com.google.appengine.runtime.Request.process-
> b91d037a09503172(Request.java)
>> at java.awt.font.TextAttribute.<clinit>(TextAttribute.java) at
>> java.lang.reflect.Field.get(Field.java:30) at
>> com.thoughtworks.xstream.core.util.Fields.read(Fields.java:69) at
> com.thoughtworks.xstream.converters.reflection.AbstractAttributedCharacterIteratorAttributeConverter.readResolve(AbstractAttributedCharacterIteratorAttributeConverter.java:128)
>> at
> com.thoughtworks.xstream.converters.reflection.AbstractAttributedCharacterIteratorAttributeConverter.<init>(AbstractAttributedCharacterIteratorAttributeConverter.java:65)
>> at
> com.thoughtworks.xstream.converters.extended.TextAttributeConverter.<init>(TextAttributeConverter.java:33)
>> at
> com.thoughtworks.xstream.converters.extended.FontConverter.<init>(FontConverter.java:56)
>> at
>> com.thoughtworks.xstream.XStream.setupConverters(XStream.java:797) at
>> com.thoughtworks.xstream.XStream.<init>(XStream.java:556) at
>> com.thoughtworks.xstream.XStream.<init>(XStream.java:485) at
>> com.thoughtworks.xstream.XStream.<init>(XStream.java:454) at
>> com.thoughtworks.xstream.XStream.<init>(XStream.java:400) at
>> com.thoughtworks.xstream.XStream.<init>(XStream.java:339) at
> com.abigailtech.appdirect.events.SubscriptionOrderEvent.getXStream(SubscriptionOrderEvent.java:329)
>
>
>
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