source: default/trunk/de.ugoe.cs.swe.bnftools.ebnf/src/de/ugoe/cs/swe/bnftools/valueconverter/EbnfTerminalConverters.java

package de.ugoe.cs.swe.bnftools.valueconverter;

import org.eclipse.xtext.common.services.DefaultTerminalConverters;
import org.eclipse.xtext.conversion.IValueConverter;
import org.eclipse.xtext.conversion.ValueConverter;
import org.eclipse.xtext.conversion.ValueConverterException;
import org.eclipse.xtext.conversion.impl.AbstractNullSafeConverter;
import org.eclipse.xtext.parsetree.AbstractNode;
import org.eclipse.xtext.util.Strings;

public class EbnfTerminalConverters extends DefaultTerminalConverters {

        @ValueConverter(rule = "STRING")
        public IValueConverter<String> STRING() {
                return new AbstractNullSafeConverter<String>() {
                        @Override
                        protected String internalToValue(String string, AbstractNode node) {
                                try {
                                        return string.substring(1,
                                                        string.length() - 1);
                                } catch (IllegalArgumentException e) {
                                        throw new ValueConverterException(e.getMessage(), node, e);
                                }
                        }

                        @Override
                        protected String internalToString(String value) {
                                return '"' + Strings.convertToJavaString(value, false) + '"';
                        }
                };
        }

}