How to use

QueryUtils

in

org.apache.jena.sparql.util

public static void checkQuery(Query query, boolean optimizeAlgebra)
{
  checkParse(query) ;
  checkOp(query, optimizeAlgebra) ;
}

try {
  LogCtl.disable(ParserBase.ParserLoggerName) ;
  QueryUtils.checkQuery(query, true) ;
} catch (QueryCheckException ex)

public static void checkOp(Query query, boolean optimizeAlgebra)
{
  IndentedLineBuffer buff = new IndentedLineBuffer() ;
  Op op = Algebra.compile(query) ;
  if ( optimizeAlgebra )
    op = Algebra.optimize(op) ;
  WriterSSE.out(buff, op, query) ;
  String str = buff.toString() ;
  
  try {
    Op op2 = SSE.parseOp(str) ;
    if ( op.hashCode() != op2.hashCode() )
    {
      op.hashCode() ;
      op2.hashCode() ;
      dump(op, op2) ;
      throw new QueryCheckException("reparsed algebra expression hashCode does not equal algebra from query") ;
    }
    if ( ! op.equals(op2) )
    {
      dump(op, op2) ;
      throw new QueryCheckException("reparsed algebra expression does not equal query algebra") ;
    }
  } catch (SSEParseException | BuildException ex)
  { 
    System.err.println(str);
    throw ex ; 
  }      // Breakpoint
}

try {
  LogCtl.disable(ParserBase.ParserLoggerName) ;
  QueryUtils.checkQuery(query, true) ;
} catch (QueryCheckException ex)

protected void runTestWorker(Query query, Syntax syntax)
{
  IndentedLineBuffer buff = new IndentedLineBuffer() ;
  query.serialize(buff, syntax) ;
  String baseURI = null ;
  
  if ( ! query.explicitlySetBaseURI() )
    // Not in query - use the same one (e.g. file read from) .  
    baseURI = query.getBaseURI() ;
  
  // Query syntax and algebra tests. 
  
  try {
    QueryUtils.checkParse(query) ;
  } 
  catch (RuntimeException ex)
  {
    System.err.println("**** Test: "+getName()) ;
    System.err.println("** "+ex.getMessage()) ;
    System.err.println(query) ;
    throw ex ; 
  }
  try {
    QueryUtils.checkOp(query, true) ;
  } catch (SSEParseException ex)
  {
    System.err.println("**** Test: "+getName()) ; 
    System.err.println("** Algebra error: "+ex.getMessage()) ;
  }
}