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27 package com.sun.star.report.function.metadata;
28 
29 import com.sun.star.report.ReportEngineParameterNames;
30 
31 import org.pentaho.reporting.libraries.formula.EvaluationException;
32 import org.pentaho.reporting.libraries.formula.FormulaContext;
33 import org.pentaho.reporting.libraries.formula.LibFormulaErrorValue;
34 import org.pentaho.reporting.libraries.formula.function.Function;
35 import org.pentaho.reporting.libraries.formula.function.ParameterCallback;
36 import org.pentaho.reporting.libraries.formula.lvalues.TypeValuePair;
37 import org.pentaho.reporting.libraries.formula.typing.coretypes.TextType;
38 
39 /**
40  *
41  * @author Ocke Janssen
42  */
43 public class AuthorFunction implements Function
44 {
45 
46     public String getCanonicalName()
47     {
48         return "AUTHOR";
49     }
50 
51     public TypeValuePair evaluate(final FormulaContext context, final ParameterCallback parameters)
52             throws EvaluationException
53     {
54         if (parameters.getParameterCount() != 0)
55         {
56             throw new EvaluationException(LibFormulaErrorValue.ERROR_ARGUMENTS_VALUE);
57         }
58 
59         return new TypeValuePair(TextType.TYPE, context.getConfiguration().getConfigProperty(ReportEngineParameterNames.AUTHOR));
60     }
61 }
62