}

        public Object evaluate(String expression) throws ExpressionEvaluationException {
            return evaluate(expression, null);
        }

        public File alignToBaseDirectory(File file) {
            if (translator != null) {
                return translator.translatePath(file);
            }
            return file;
        }
    }

        if (value != null) {
            expression = ValueSourceUtils.trimPrefix(expression, expressionPrefixes, true);

            if (unprefixedPathKeys.contains(expression)) {
                return pathTranslator.alignToBaseDirectory(String.valueOf(value), projectDir);
            }
        }

        return null;
    }

/**
 * Resolves relative paths against a specific base directory.
 *
 */
@Named
@Singleton
public class DefaultPathTranslator implements PathTranslator {

    @Override
    public String alignToBaseDirectory(String path, Path basedir) {
        String result = path;

        if (path != null && basedir != null) {
            path = path.replace('\\', File.separatorChar).replace('/', File.separatorChar);

        interpolator.addValueSource(new MapBasedValueSource(context.getSystemProperties()));

        String absolutePath = interpolator.interpolate(path, "");

        return pathTranslator.alignToBaseDirectory(absolutePath, basedir);
    }

        interpolator.addValueSource(new MapBasedValueSource(context.getSystemProperties()));

        String absolutePath = interpolator.interpolate(path, "");

        return pathTranslator.alignToBaseDirectory(absolutePath, basedir);
    }