package org.pentaho.reporting.engine.classic.core.function.formula;
import java.io.UnsupportedEncodingException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.pentaho.reporting.engine.classic.core.util.beans.BeanException;
import org.pentaho.reporting.engine.classic.core.util.beans.ConverterRegistry;
import org.pentaho.reporting.libraries.base.util.DebugLog;
import org.pentaho.reporting.libraries.formula.EvaluationException;
import org.pentaho.reporting.libraries.formula.FormulaContext;
import org.pentaho.reporting.libraries.formula.LibFormulaErrorValue;
import org.pentaho.reporting.libraries.formula.util.URLEncoder;
import org.pentaho.reporting.libraries.formula.function.Function;
import org.pentaho.reporting.libraries.formula.function.ParameterCallback;
import org.pentaho.reporting.libraries.formula.lvalues.TypeValuePair;
import org.pentaho.reporting.libraries.formula.typing.coretypes.TextType;
import org.pentaho.reporting.libraries.formula.typing.Type;
/**
* Todo: Document me!
* <p/>
* Date: 13.11.2009
* Time: 13:18:46
*
* @author Thomas Morgner.
*/
public class ParameterTextFunction implements Function
{
private static final Log logger = LogFactory.getLog(ParameterTextFunction.class);
public ParameterTextFunction()
{
}
public String getCanonicalName()
{
return "PARAMETERTEXT";
}
public TypeValuePair evaluate(final FormulaContext context,
final ParameterCallback parameters) throws EvaluationException
{
final int parameterCount = parameters.getParameterCount();
if (parameterCount < 1 || parameterCount > 3)
{
throw EvaluationException.getInstance(LibFormulaErrorValue.ERROR_ARGUMENTS_VALUE);
}
final Object rawValue = parameters.getValue(0);
if (rawValue == null)
{
throw EvaluationException.getInstance(LibFormulaErrorValue.ERROR_NA_VALUE);
}
final String s;
try
{
s = ConverterRegistry.toAttributeValue(rawValue);
}
catch (BeanException e)
{
// ok, so what. Log and return error
logger.warn("PARAMETERTEXT: Failed to convert value " + rawValue + " (" + rawValue.getClass() + ")", e);
throw EvaluationException.getInstance(LibFormulaErrorValue.ERROR_UNEXPECTED_VALUE);
}
if (s == null)
{
return new TypeValuePair(TextType.TYPE, "");
}
final String encodingResult;
if (parameterCount > 1)
{
final Object urlEncode = context.getTypeRegistry().convertToLogical(parameters.getType(1), parameters.getValue(1));
if (Boolean.FALSE.equals(urlEncode))
{
return new TypeValuePair(TextType.TYPE, s);
}
if(parameterCount == 3)
{
final Type encodingType = parameters.getType(2);
final Object encodingValue = parameters.getValue(2);
encodingResult = context.getTypeRegistry().convertToText(encodingType, encodingValue);
if(encodingResult == null)
{
throw EvaluationException.getInstance(LibFormulaErrorValue.ERROR_INVALID_ARGUMENT_VALUE);
}
}
else
{
encodingResult = context.getConfiguration().getConfigProperty
("org.pentaho.reporting.libraries.formula.URLEncoding", "ISO-8859-1");
}
}
else
{
encodingResult = context.getConfiguration().getConfigProperty
("org.pentaho.reporting.libraries.formula.URLEncoding", "ISO-8859-1");
}
try
{
return new TypeValuePair(TextType.TYPE, URLEncoder.encode(s, encodingResult));
}
catch(final UnsupportedEncodingException use)
{
throw EvaluationException.getInstance(LibFormulaErrorValue.ERROR_INVALID_ARGUMENT_VALUE);
}
}
}