package org.pentaho.reporting.engine.classic.core.function.formula;
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.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.Type;
import org.pentaho.reporting.libraries.formula.typing.coretypes.TextType;
import org.pentaho.reporting.libraries.formula.util.FormulaUtil;
import org.pentaho.reporting.libraries.xmlns.writer.CharacterEntityParser;
import org.pentaho.reporting.libraries.xmlns.writer.HtmlCharacterEntities;
/**
* Todo: Document me!
* <p/>
* Date: 16.07.2010
* Time: 17:19:21
*
* @author Thomas Morgner.
*/
public class QuoteTextFunction implements Function
{
public QuoteTextFunction()
{
}
public String getCanonicalName()
{
return "QUOTETEXT";
}
public TypeValuePair evaluate(final FormulaContext context,
final ParameterCallback parameters) throws EvaluationException
{
final int parameterCount = parameters.getParameterCount();
if (parameterCount < 1)
{
throw EvaluationException.getInstance(LibFormulaErrorValue.ERROR_ARGUMENTS_VALUE);
}
final Type textType = parameters.getType(0);
final Object textValue = parameters.getValue(0);
final String textResult =
context.getTypeRegistry().convertToText(textType, textValue);
if (textResult == null)
{
throw EvaluationException.getInstance(LibFormulaErrorValue.ERROR_INVALID_ARGUMENT_VALUE);
}
final String encodingResult;
if (parameterCount == 2)
{
final Type encodingType = parameters.getType(1);
final Object encodingValue = parameters.getValue(1);
encodingResult = context.getTypeRegistry().convertToText(encodingType, encodingValue);
if (encodingResult == null)
{
throw EvaluationException.getInstance(LibFormulaErrorValue.ERROR_INVALID_ARGUMENT_VALUE);
}
}
else
{
encodingResult = "javascript";
}
if (encodingResult.equals("xml"))
{
return new TypeValuePair(TextType.TYPE, CharacterEntityParser.createXMLEntityParser().encodeEntities(textResult));
}
else if (encodingResult.equals("html"))
{
return new TypeValuePair(TextType.TYPE, HtmlCharacterEntities.getEntityParser().encodeEntities(textResult));
}
else if (encodingResult.equals("formula-string"))
{
return new TypeValuePair(TextType.TYPE, FormulaUtil.quoteString(textResult));
}
else if (encodingResult.equals("formula-reference"))
{
return new TypeValuePair(TextType.TYPE, FormulaUtil.quoteReference(textResult));
}
else // javascript
{
return new TypeValuePair(TextType.TYPE, saveConvert(textResult));
}
}
/**
* Performs the necessary conversion of an java string into a property escaped string.
*
* @param text the text to be escaped
*/
public static String saveConvert(final String text)
{
if (text == null)
{
return text;
}
final StringBuffer buffer = new StringBuffer();
final char[] string = text.toCharArray();
final char[] hexChars = {'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
for (int x = 0; x < string.length; x++)
{
final char aChar = string[x];
switch (aChar)
{
case '\\':
{
buffer.append('\\');
buffer.append('\\');
break;
}
case '\t':
{
buffer.append('\\');
buffer.append('t');
break;
}
case '\n':
{
buffer.append('\\');
buffer.append('n');
break;
}
case '\r':
{
buffer.append('\\');
buffer.append('r');
break;
}
case '\f':
{
buffer.append('\\');
buffer.append('f');
break;
}
case '\b':
{
buffer.append('\\');
buffer.append('b');
break;
}
case '"':
case '\'':
case '&':
{
buffer.append('\\');
buffer.append(aChar);
break;
}
default:
buffer.append(aChar);
}
}
return buffer.toString();
}
}