Examples of org.teiid.query.function.FunctionLibrary.findFunction()

Class org.teiid.query.function.FunctionLibrary

Examples of org.teiid.query.function.FunctionLibrary.findFunction()

org.teiid.query.function.FunctionLibrary.findFunction()
Find a function descriptor given a name and the types of the arguments. This method matches based on case-insensitive function name and an exact match of the number and types of parameter arguments. @param name Name of the function to resolve @param types Array of classes representing the types @return Descriptor if found, null if not found

        }


        // Create a function of the two constants and evaluate it
        Expression combinedConst = null;
        FunctionLibrary funcLib = this.metadata.getFunctionLibrary();
        FunctionDescriptor descriptor = funcLib.findFunction(oppFunc, new Class[] { rightExpr.getType(), const1.getType() });
        if (descriptor == null){
            //See defect 9380 - this can be caused by const2 being a null Constant, for example (? + 1) < null
            return criteria;
        }

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        if(!(formatExpr instanceof Constant)) {
            return crit;
        }
        String format = (String)((Constant)formatExpr).getValue();
        FunctionLibrary funcLib = this.metadata.getFunctionLibrary();
        FunctionDescriptor descriptor = funcLib.findFunction(inverseFunction, new Class[] { rightExpr.getType(), formatExpr.getType() });
        if(descriptor == null){
            return crit;
        }
      Object value = ((Constant)rightExpr).getValue();
      try {

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      Expression[] args = function.getArgs();
        Class<?>[] types = new Class[args.length];
        for(int i=0; i<args.length; i++) {
            types[i] = args[i].getType();
        }
      FunctionDescriptor descriptor = funcLibrary.findFunction(actualName, types);
      function.setFunctionDescriptor(descriptor);
    }
    
    Integer code = FUNCTION_MAP.get(functionLowerName);
    if (code != null) {

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      case 0: { //space(x) => repeat(' ', x)
        Function result = new Function(SourceSystemFunctions.REPEAT,
            new Expression[] {new Constant(" "), function.getArg(0)}); //$NON-NLS-1$
        //resolve the function
        FunctionDescriptor descriptor = 
          funcLibrary.findFunction(SourceSystemFunctions.REPEAT, new Class[] { DataTypeManager.DefaultDataClasses.STRING, DataTypeManager.DefaultDataClasses.INTEGER});
        result.setFunctionDescriptor(descriptor);
        result.setType(DataTypeManager.DefaultDataClasses.STRING);
        function = result;
        break;
      }

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      case 1: {//from_unixtime(a) => timestampadd(SQL_TSI_SECOND, a, new Timestamp(0)) 
        Function result = new Function(FunctionLibrary.TIMESTAMPADD,
            new Expression[] {new Constant(NonReserved.SQL_TSI_SECOND), function.getArg(0), new Constant(new Timestamp(0)) });
        //resolve the function
        FunctionDescriptor descriptor = 
          funcLibrary.findFunction(FunctionLibrary.TIMESTAMPADD, new Class[] { DataTypeManager.DefaultDataClasses.STRING, DataTypeManager.DefaultDataClasses.INTEGER, DataTypeManager.DefaultDataClasses.TIMESTAMP });
        result.setFunctionDescriptor(descriptor);
        result.setType(DataTypeManager.DefaultDataClasses.TIMESTAMP);
        function = result;
        break;
      }

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        if (args.length == 2) {
          Function result = new Function(SourceSystemFunctions.IFNULL,
              new Expression[] {function.getArg(0), function.getArg(1) });
          //resolve the function
          FunctionDescriptor descriptor = 
            funcLibrary.findFunction(SourceSystemFunctions.IFNULL, new Class[] { function.getType(), function.getType()  });
          result.setFunctionDescriptor(descriptor);
          result.setType(function.getType());
          function = result;
        }
        break;

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        for(int i=0; i<args.length; i++) {
          newArgs[i] = new Function(SourceSystemFunctions.IFNULL, new Expression[] {args[i], new Constant("")}); //$NON-NLS-1$
          newArgs[i].setType(args[i].getType());
          Assertion.assertTrue(args[i].getType() == DataTypeManager.DefaultDataClasses.STRING);
              FunctionDescriptor descriptor = 
                funcLibrary.findFunction(SourceSystemFunctions.IFNULL, new Class[] { args[i].getType(), DataTypeManager.DefaultDataClasses.STRING });
              newArgs[i].setFunctionDescriptor(descriptor);
        }
        
        Function concat = new Function(SourceSystemFunctions.CONCAT, newArgs);
        concat.setType(DataTypeManager.DefaultDataClasses.STRING);

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        }
        
        Function concat = new Function(SourceSystemFunctions.CONCAT, newArgs);
        concat.setType(DataTypeManager.DefaultDataClasses.STRING);
        FunctionDescriptor descriptor = 
          funcLibrary.findFunction(SourceSystemFunctions.CONCAT, new Class[] { DataTypeManager.DefaultDataClasses.STRING, DataTypeManager.DefaultDataClasses.STRING });
        concat.setFunctionDescriptor(descriptor);
        
        List when = Arrays.asList(new Criteria[] {new CompoundCriteria(CompoundCriteria.AND, new IsNullCriteria(args[0]), new IsNullCriteria(args[1]))});
        Constant nullConstant = new Constant(null, DataTypeManager.DefaultDataClasses.STRING);
        List then = Arrays.asList(new Expression[] {nullConstant});

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        return rewriteExpressionDirect(caseExpr);
      }
      case 5: {
        if (function.getType() != DataTypeManager.DefaultDataClasses.TIMESTAMP) {
          FunctionDescriptor descriptor = 
            funcLibrary.findFunction(SourceSystemFunctions.TIMESTAMPADD, new Class[] { DataTypeManager.DefaultDataClasses.STRING, DataTypeManager.DefaultDataClasses.INTEGER, DataTypeManager.DefaultDataClasses.TIMESTAMP });
          function.setFunctionDescriptor(descriptor);
          Class<?> type = function.getType();
          function.setType(DataTypeManager.DefaultDataClasses.TIMESTAMP);
          function.getArgs()[2] = ResolverUtil.getConversion(function.getArg(2), DataTypeManager.getDataTypeName(type), DataTypeManager.DefaultDataTypes.TIMESTAMP, false, funcLibrary);
          function = ResolverUtil.getConversion(function, DataTypeManager.DefaultDataTypes.TIMESTAMP, DataTypeManager.getDataTypeName(type), false, funcLibrary);

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        break;
      }
      case 6:
      case 7: {
        FunctionDescriptor descriptor = 
          funcLibrary.findFunction(SourceSystemFunctions.PARSETIMESTAMP, new Class[] { DataTypeManager.DefaultDataClasses.STRING, DataTypeManager.DefaultDataClasses.STRING });
        function.setName(SourceSystemFunctions.PARSETIMESTAMP);
        function.setFunctionDescriptor(descriptor);
        Class<?> type = function.getType();
        function.setType(DataTypeManager.DefaultDataClasses.TIMESTAMP);
        function = ResolverUtil.getConversion(function, DataTypeManager.DefaultDataTypes.TIMESTAMP, DataTypeManager.getDataTypeName(type), false, funcLibrary);

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