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21 
22 
23 package com.sun.star.report.function.metadata;
24 
25 import com.sun.star.report.ReportEngineParameterNames;
26 
27 import org.pentaho.reporting.libraries.formula.EvaluationException;
28 import org.pentaho.reporting.libraries.formula.FormulaContext;
29 import org.pentaho.reporting.libraries.formula.LibFormulaErrorValue;
30 import org.pentaho.reporting.libraries.formula.function.Function;
31 import org.pentaho.reporting.libraries.formula.function.ParameterCallback;
32 import org.pentaho.reporting.libraries.formula.lvalues.TypeValuePair;
33 import org.pentaho.reporting.libraries.formula.typing.coretypes.TextType;
34 
35 /**
36  *
37  * @author Ocke Janssen
38  */
39 public class AuthorFunction implements Function
40 {
41 
getCanonicalName()42     public String getCanonicalName()
43     {
44         return "AUTHOR";
45     }
46 
evaluate(final FormulaContext context, final ParameterCallback parameters)47     public TypeValuePair evaluate(final FormulaContext context, final ParameterCallback parameters)
48             throws EvaluationException
49     {
50         if (parameters.getParameterCount() != 0)
51         {
52             throw new EvaluationException(LibFormulaErrorValue.ERROR_ARGUMENTS_VALUE);
53         }
54 
55         return new TypeValuePair(TextType.TYPE, context.getConfiguration().getConfigProperty(ReportEngineParameterNames.AUTHOR));
56     }
57 }
58