Examples of FunctionMethod

org.teiid.metadata.FunctionMethod
This class represents information about a particular function signature. Function signatures are unique with respect to their name, # of arguments, and type of arguments. Return type and argument names are not uniqueness factors. This class makes no attempt to validate the data put into it, particularly with respect to null values. The {@link FunctionMetadataValidator} can be used to validate this object.
Attributes:
- name - Name of the function
- description - Description of the function
- category - Function category containing this function
- pushdown - Determine whether this function can, cannot, or must be pushed down to a source
- invocationClass - Class containing method implementing this function
- invocationMethod - Method implementing this function
- inputParameters - 0 or more input parameters
- outputParameter - 1 output parameter
- determinism - specifies whether the function is deterministic or not. Various levels are provided
- nullOnNull - Specifies whether the function is called if any of the input arguments is null. The result is the null value.
@see FunctionParameter
org.teiid.query.function.metadata.FunctionMethod
@see FunctionMetadataValidator @see FunctionCategoryConstants

Examples of org.teiid.query.function.metadata.FunctionMethod

        new FunctionParameter("result", DataTypeManager.DefaultDataTypes.CLOB, QueryPlugin.Util.getString("SystemSource.encode_result")) ) );                 //$NON-NLS-1$ //$NON-NLS-2$
  }
  
  private void addToBytesFunction() {
    functions.add(
      new FunctionMethod("to_bytes", QueryPlugin.Util.getString("SystemSource.decode_desc"), CONVERSION, FUNCTION_CLASS, "toBytes", //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$  
        new FunctionParameter[] {
          new FunctionParameter("value", DataTypeManager.DefaultDataTypes.CLOB, QueryPlugin.Util.getString("SystemSource.decode_arg1")), //$NON-NLS-1$ //$NON-NLS-2$
          new FunctionParameter("encoding", DataTypeManager.DefaultDataTypes.STRING, QueryPlugin.Util.getString("SystemSource.decode_arg2"))}, //$NON-NLS-1$ //$NON-NLS-2$
        new FunctionParameter("result", DataTypeManager.DefaultDataTypes.BLOB, QueryPlugin.Util.getString("SystemSource.decode_result")) ) );                 //$NON-NLS-1$ //$NON-NLS-2$
  }

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Examples of org.teiid.query.function.metadata.FunctionMethod

        new FunctionParameter("result", DataTypeManager.DefaultDataTypes.BLOB, QueryPlugin.Util.getString("SystemSource.decode_result")) ) );                 //$NON-NLS-1$ //$NON-NLS-2$
  }
  
    private void addAsciiFunction() {
        functions.add(
            new FunctionMethod(SourceSystemFunctions.ASCII, QueryPlugin.Util.getString("SystemSource.Ascii_desc"), STRING, FUNCTION_CLASS, "ascii", //$NON-NLS-1$ //$NON-NLS-2$ 
                new FunctionParameter[] {
                    new FunctionParameter("string", DataTypeManager.DefaultDataTypes.STRING, QueryPlugin.Util.getString("SystemSource.Ascii_arg1")) }, //$NON-NLS-1$ //$NON-NLS-2$
                new FunctionParameter("result", DataTypeManager.DefaultDataTypes.INTEGER, QueryPlugin.Util.getString("SystemSource.Ascii_result")) ) ); //$NON-NLS-1$ //$NON-NLS-2$
        functions.add(
            new FunctionMethod(SourceSystemFunctions.ASCII, QueryPlugin.Util.getString("SystemSource.Ascii2_desc"), STRING, FUNCTION_CLASS, "ascii", //$NON-NLS-1$ //$NON-NLS-2$ 
                new FunctionParameter[] {
                    new FunctionParameter("char", DataTypeManager.DefaultDataTypes.CHAR, QueryPlugin.Util.getString("SystemSource.Ascii2_arg1")) }, //$NON-NLS-1$ //$NON-NLS-2$
                new FunctionParameter("result", DataTypeManager.DefaultDataTypes.INTEGER, QueryPlugin.Util.getString("SystemSource.Ascii2_result")) ) ); //$NON-NLS-1$ //$NON-NLS-2$
    }

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Examples of org.teiid.query.function.metadata.FunctionMethod

                new FunctionParameter("result", DataTypeManager.DefaultDataTypes.INTEGER, QueryPlugin.Util.getString("SystemSource.Ascii2_result")) ) ); //$NON-NLS-1$ //$NON-NLS-2$
    }


  private void addCharFunction() {
    functions.add(
      new FunctionMethod(SourceSystemFunctions.CHAR, QueryPlugin.Util.getString("SystemSource.Char_desc"), STRING, FUNCTION_CLASS, "chr", //$NON-NLS-1$ //$NON-NLS-2$ 
        new FunctionParameter[] {
          new FunctionParameter("code", DataTypeManager.DefaultDataTypes.INTEGER, QueryPlugin.Util.getString("SystemSource.Char_arg1")) }, //$NON-NLS-1$ //$NON-NLS-2$
        new FunctionParameter("result", DataTypeManager.DefaultDataTypes.CHAR, QueryPlugin.Util.getString("SystemSource.Char_result")) ) ); //$NON-NLS-1$ //$NON-NLS-2$
        functions.add(
                new FunctionMethod("chr", QueryPlugin.Util.getString("SystemSource.Chr_desc"), STRING, FUNCTION_CLASS, "chr", //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
                    new FunctionParameter[] {
                        new FunctionParameter("code", DataTypeManager.DefaultDataTypes.INTEGER, QueryPlugin.Util.getString("SystemSource.Chr_arg1")) }, //$NON-NLS-1$ //$NON-NLS-2$
                    new FunctionParameter("result", DataTypeManager.DefaultDataTypes.CHAR, QueryPlugin.Util.getString("SystemSource.Chr_result")) ) ); //$NON-NLS-1$ //$NON-NLS-2$
  }

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Examples of org.teiid.query.function.metadata.FunctionMethod

                    new FunctionParameter("result", DataTypeManager.DefaultDataTypes.CHAR, QueryPlugin.Util.getString("SystemSource.Chr_result")) ) ); //$NON-NLS-1$ //$NON-NLS-2$
  }
  
    private void addInitCapFunction() {
        functions.add(
            new FunctionMethod(SourceSystemFunctions.INITCAP, QueryPlugin.Util.getString("SystemSource.Initcap_desc"), STRING, FUNCTION_CLASS, "initCap", //$NON-NLS-1$ //$NON-NLS-2$ 
                new FunctionParameter[] {
                    new FunctionParameter("string", DataTypeManager.DefaultDataTypes.STRING, QueryPlugin.Util.getString("SystemSource.Initcap_arg1")) }, //$NON-NLS-1$ //$NON-NLS-2$
                new FunctionParameter("result", DataTypeManager.DefaultDataTypes.STRING, QueryPlugin.Util.getString("SystemSource.Initcap_result")) ) ); //$NON-NLS-1$ //$NON-NLS-2$
    }

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Examples of org.teiid.query.function.metadata.FunctionMethod

                new FunctionParameter("result", DataTypeManager.DefaultDataTypes.STRING, QueryPlugin.Util.getString("SystemSource.Initcap_result")) ) ); //$NON-NLS-1$ //$NON-NLS-2$
    }


    private void addLpadFunction() {
        functions.add(
            new FunctionMethod(SourceSystemFunctions.LPAD, QueryPlugin.Util.getString("SystemSource.Lpad_desc"), STRING, FUNCTION_CLASS, "lpad", //$NON-NLS-1$ //$NON-NLS-2$ 
                new FunctionParameter[] {
                    new FunctionParameter("string", DataTypeManager.DefaultDataTypes.STRING, QueryPlugin.Util.getString("SystemSource.Lpad_arg1")), //$NON-NLS-1$ //$NON-NLS-2$
                    new FunctionParameter("length", DataTypeManager.DefaultDataTypes.INTEGER, QueryPlugin.Util.getString("SystemSource.Lpad_arg2")) }, //$NON-NLS-1$ //$NON-NLS-2$
                new FunctionParameter("result", DataTypeManager.DefaultDataTypes.STRING, QueryPlugin.Util.getString("SystemSource.Lpad_result")) ) ); //$NON-NLS-1$ //$NON-NLS-2$
        functions.add(
            new FunctionMethod(SourceSystemFunctions.LPAD, QueryPlugin.Util.getString("SystemSource.Lpad3_desc"), STRING, FUNCTION_CLASS, "lpad", //$NON-NLS-1$ //$NON-NLS-2$ 
                new FunctionParameter[] {
                    new FunctionParameter("string", DataTypeManager.DefaultDataTypes.STRING, QueryPlugin.Util.getString("SystemSource.Lpad3_arg1")), //$NON-NLS-1$ //$NON-NLS-2$
                    new FunctionParameter("length", DataTypeManager.DefaultDataTypes.INTEGER, QueryPlugin.Util.getString("SystemSource.Lpad3_arg2")), //$NON-NLS-1$ //$NON-NLS-2$
                    new FunctionParameter("char", DataTypeManager.DefaultDataTypes.STRING, QueryPlugin.Util.getString("SystemSource.Lpad3_arg3")) }, //$NON-NLS-1$ //$NON-NLS-2$
                new FunctionParameter("result", DataTypeManager.DefaultDataTypes.STRING, QueryPlugin.Util.getString("SystemSource.Lpad3_result")) ) ); //$NON-NLS-1$ //$NON-NLS-2$

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Examples of org.teiid.query.function.metadata.FunctionMethod

                new FunctionParameter("result", DataTypeManager.DefaultDataTypes.STRING, QueryPlugin.Util.getString("SystemSource.Lpad3_result")) ) ); //$NON-NLS-1$ //$NON-NLS-2$
    }


    private void addRpadFunction() {
        functions.add(
            new FunctionMethod(SourceSystemFunctions.RPAD, QueryPlugin.Util.getString("SystemSource.Rpad1_desc"), STRING, FUNCTION_CLASS, "rpad", //$NON-NLS-1$ //$NON-NLS-2$ 
                new FunctionParameter[] {
                    new FunctionParameter("string", DataTypeManager.DefaultDataTypes.STRING, QueryPlugin.Util.getString("SystemSource.Rpad1_arg1")), //$NON-NLS-1$ //$NON-NLS-2$
                    new FunctionParameter("length", DataTypeManager.DefaultDataTypes.INTEGER, QueryPlugin.Util.getString("SystemSource.Rpad1_arg2")) }, //$NON-NLS-1$ //$NON-NLS-2$
                new FunctionParameter("result", DataTypeManager.DefaultDataTypes.STRING, QueryPlugin.Util.getString("SystemSource.Rpad1_result")) ) ); //$NON-NLS-1$ //$NON-NLS-2$
        functions.add(
            new FunctionMethod(SourceSystemFunctions.RPAD, QueryPlugin.Util.getString("SystemSource.Rpad3_desc"), STRING, FUNCTION_CLASS, "rpad", //$NON-NLS-1$ //$NON-NLS-2$ 
                new FunctionParameter[] {
                    new FunctionParameter("string", DataTypeManager.DefaultDataTypes.STRING, QueryPlugin.Util.getString("SystemSource.Rpad3_arg1")), //$NON-NLS-1$ //$NON-NLS-2$
                    new FunctionParameter("length", DataTypeManager.DefaultDataTypes.INTEGER, QueryPlugin.Util.getString("SystemSource.Rpad3_arg2")), //$NON-NLS-1$ //$NON-NLS-2$
                    new FunctionParameter("char", DataTypeManager.DefaultDataTypes.STRING, QueryPlugin.Util.getString("SystemSource.Rpad3_arg3")) }, //$NON-NLS-1$ //$NON-NLS-2$
                new FunctionParameter("result", DataTypeManager.DefaultDataTypes.STRING, QueryPlugin.Util.getString("SystemSource.Rpad3_result")) ) ); //$NON-NLS-1$ //$NON-NLS-2$

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Examples of org.teiid.query.function.metadata.FunctionMethod

                new FunctionParameter("result", DataTypeManager.DefaultDataTypes.STRING, QueryPlugin.Util.getString("SystemSource.Rpad3_result")) ) ); //$NON-NLS-1$ //$NON-NLS-2$
    }


    private void addTranslateFunction() {
        functions.add(
            new FunctionMethod(SourceSystemFunctions.TRANSLATE, QueryPlugin.Util.getString("SystemSource.Translate_desc"), STRING, FUNCTION_CLASS, "translate", //$NON-NLS-1$ //$NON-NLS-2$ 
                new FunctionParameter[] {
                    new FunctionParameter("string", DataTypeManager.DefaultDataTypes.STRING, QueryPlugin.Util.getString("SystemSource.Translate_arg1")), //$NON-NLS-1$ //$NON-NLS-2$
                    new FunctionParameter("source", DataTypeManager.DefaultDataTypes.STRING, QueryPlugin.Util.getString("SystemSource.Translate_arg2")), //$NON-NLS-1$ //$NON-NLS-2$
                    new FunctionParameter("destination", DataTypeManager.DefaultDataTypes.STRING, QueryPlugin.Util.getString("SystemSource.Translate_arg3")) }, //$NON-NLS-1$ //$NON-NLS-2$
                new FunctionParameter("result", DataTypeManager.DefaultDataTypes.STRING, QueryPlugin.Util.getString("SystemSource.Translate_result")) ) ); //$NON-NLS-1$ //$NON-NLS-2$

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Examples of org.teiid.query.function.metadata.FunctionMethod

      }
    }
    
    private void addTypedConversionFunction(String name, String sourceType) {
        functions.add(
            new FunctionMethod(name, QueryPlugin.Util.getString("SystemSource.Convert_desc", sourceType), CONVERSION, FUNCTION_CLASS, "convert", //$NON-NLS-1$ //$NON-NLS-2$ 
                new FunctionParameter[] {
                    new FunctionParameter("value", sourceType, QueryPlugin.Util.getString("SystemSource.Convert_arg1")), //$NON-NLS-1$ //$NON-NLS-2$
                    new FunctionParameter("target", DataTypeManager.DefaultDataTypes.STRING, QueryPlugin.Util.getString("SystemSource.Convert_arg2")) }, //$NON-NLS-1$ //$NON-NLS-2$
                new FunctionParameter("result", DataTypeManager.DefaultDataTypes.OBJECT, QueryPlugin.Util.getString("SystemSource.Convert_result")) ) );                 //$NON-NLS-1$ //$NON-NLS-2$

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Examples of org.teiid.query.function.metadata.FunctionMethod

      }
    }
    
    private void addTypedContextFunction(String contextType, String exprType) {
        functions.add(
            new FunctionMethod("context", QueryPlugin.Util.getString("SystemSource.Context_desc"), MISCELLANEOUS, FUNCTION_CLASS, "context", //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
                new FunctionParameter[] {
                    new FunctionParameter("context", contextType, QueryPlugin.Util.getString("SystemSource.Context_arg1")), //$NON-NLS-1$ //$NON-NLS-2$
                    new FunctionParameter("element", exprType, QueryPlugin.Util.getString("SystemSource.Context_arg2")) }, //$NON-NLS-1$ //$NON-NLS-2$
                new FunctionParameter("result", exprType, QueryPlugin.Util.getString("SystemSource.Context_result")) ) );                     //$NON-NLS-1$ //$NON-NLS-2$
    }

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Examples of org.teiid.query.function.metadata.FunctionMethod

    } 
    
    private void addRowLimitFunctions() {
      for (String exprType : DataTypeManager.getAllDataTypeNames()) {
            functions.add(
                    new FunctionMethod("rowlimit", QueryPlugin.Util.getString("SystemSource.Rowlimit_desc"), MISCELLANEOUS, FUNCTION_CLASS, "rowlimit", //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
                        new FunctionParameter[] {
                            new FunctionParameter("element", exprType, QueryPlugin.Util.getString("SystemSource.Rowlimit_arg1")) }, //$NON-NLS-1$ //$NON-NLS-2$
                        new FunctionParameter("result", DataTypeManager.DefaultDataTypes.INTEGER, QueryPlugin.Util.getString("SystemSource.Rowlimit_result")) ) );                     //$NON-NLS-1$ //$NON-NLS-2$
      }
    }

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