Enabling Unicode Support in Solr

I want to enable the Unicode in Solr. Updating the index does not give me an error. But as soon as I try to search some Chinese text, I get an error. I have added the following line to my schema.

<filter cl开发者_开发知识库ass="solr.CollationKeyFilterFactory" language="" strength="primary"/>

and now I am getting following exception.

org.apache.solr.common.SolrException: Error loading class 'solr.CollationKeyFilterFactory'

at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:375)

at org.apache.solr.core.SolrResourceLoader.newInstance(SolrResourceLoader.java:390)

at org.apache.solr.util.plugin.AbstractPluginLoader.create(AbstractPluginLoader.java:84)

at org.apache.solr.util.plugin.AbstractPluginLoader.load(AbstractPluginLoader.java:141)

at org.apache.solr.schema.IndexSchema.readAnalyzer(IndexSchema.java:835)

According to the Solr wiki, CollationKeyFilterFactory is currently only available in trunk. That's why you get an error that the class doesn't exist.