package refactoring.struts;

import java.util.List;

import net.sourceforge.fenixedu.util.StringUtils;

import org.apache.struts.config.ExceptionConfig;

public class ExceptionsCreator {

    public static String createException(final ExceptionConfig exceptionConfig) {
	StringBuilder sourceCode = new StringBuilder();
	
	final String exceptionHandler = exceptionConfig.getHandler();
	final String messageKey = exceptionConfig.getKey();
	final String exceptionTypeName = exceptionConfig.getType();
	
	sourceCode.append("@ExceptionHandling(");

	if (!StringUtils.isEmpty(exceptionTypeName)) {
	    sourceCode.append("type = " + exceptionTypeName + ".class");
	} else {
	    throw new RuntimeException("Struts refactoring: an Exception handler had no exception type");
	}
	
	if (!StringUtils.isEmpty(messageKey)) {
	    sourceCode.append(", key = " + messageKey);
	}

	if (!StringUtils.isEmpty(exceptionHandler)) {
	    sourceCode.append(", handler = " + exceptionHandler + ".class");
	}

	sourceCode.append(")");

	return sourceCode.toString();
    }

    public static String createExceptionsAnnotation(final List<String> exceptionsList) {
	StringBuilder sourceCode = new StringBuilder();

	sourceCode.append("@Exceptions( {");
	sourceCode.append("\n");

	int i;
	for (i = 0; i < (exceptionsList.size() - 1); i++) {
	    sourceCode.append(exceptionsList.get(i));
	    sourceCode.append("," + "\n");
	}

	sourceCode.append(exceptionsList.get(i));

	sourceCode.append("\n" + "} )");

	return sourceCode.toString();
    }

}