Resurrecting an old thread. I faced exact problem as Tommy and the jar was in {solr.home}/lib as Noble had suggested.
My custom transformer overrides following method as per the specification of Transformer class. public Object transformRow(Map<String, Object> row, Context context); But, in the code (EntityProcessorWrapper.java), I see the following line. final Method meth = clazz.getMethod(TRANSFORM_ROW, Map.class); This doesn't match the method signature in Transformer. I think this should be final Method meth = clazz.getMethod(TRANSFORM_ROW, Map.class, Context.class); I have verified that adding a method transformRow(Map<String, Object> row) works. Am I missing something? --shashi 2010/2/8 Noble Paul നോബിള് नोब्ळ् <noble.p...@corp.aol.com> > On Mon, Feb 8, 2010 at 9:13 AM, Tommy Chheng <tommy.chh...@gmail.com> > wrote: > > I'm having trouble making a custom DIH transformer in solr 1.4. > > > > I compiled the "General TrimTransformer" into a jar. (just copy/paste > sample > > code from http://wiki.apache.org/solr/DIHCustomTransformer) > > I placed the jar along with the dataimporthandler jar in solr/lib (same > > directory as the jetty jar) > > do not keep in solr/lib it wont work. keep it in {solr.home}/lib > > > > Then I added to my DIH data-config.xml file: > > transformer="DateFormatTransformer, RegexTransformer, > > com.chheng.dih.transformers.TrimTransformer" > > > > Now I get this exception when I try running the import. > > org.apache.solr.handler.dataimport.DataImportHandlerException: > > java.lang.NoSuchMethodException: > > com.chheng.dih.transformers.TrimTransformer.transformRow(java.util.Map) > > at > > > org.apache.solr.handler.dataimport.EntityProcessorWrapper.loadTransformers(EntityProcessorWrapper.java:120) > > > > I noticed the exception lists TrimTransformer.transformRow(java.util.Map) > > but the abstract Transformer class defines a two parameter method: > > transformRow(Map<String, Object> row, Context context)? > > > > > > -- > > Tommy Chheng > > Programmer and UC Irvine Graduate Student > > Twitter @tommychheng > > http://tommy.chheng.com > > > > > > -- > ----------------------------------------------------- > Noble Paul | Systems Architect| AOL | http://aol.com >