SQL Syntax Error when using IncludeFilter or ExcludeFilter
----------------------------------------------------------

                 Key: GEOT-1992
                 URL: http://jira.codehaus.org/browse/GEOT-1992
             Project: GeoTools
          Issue Type: Bug
          Components: data db2
    Affects Versions: 2.5-RC0, 2.6-M0
            Reporter: Christian Mueller


DB2SqlEncoder has no methods handling IncludeFilter and ExcludeFilter. This 
results in Sql Statements using 

"WHERE FALSE" 
"WHERE TRUE"

Solution:

Add 2 Methods

                @Override
                public Object visit(ExcludeFilter filter, Object extraData) {
                        try {
                                out.write("1=0");
                        } catch (java.io.IOException ioe) {};
                        return extraData;
                }

                @Override
                public Object visit(IncludeFilter filter, Object extraData) {
                        try {
                                out.write("1=1");
                        } catch (java.io.IOException ioe) {};
                        return extraData;
                }

which result in 

"WHERE 1=1" 
"WHERE 0=1"


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