package info.glogalcode.parameterLister.modules;

import info.glogalcode.parameterLister.OutputModule;

import info.glogalcode.parameterLister.OutputModuleException;

import java.io.OutputStream;

import java.io.PrintWriter;

import java.util.List;

/**

 * Just a simple XML output.

 * For more complex documents, use {@linkplain javax.xml.stream.XMLStreamWriter}

 *

 * @author Ing. František Kučera (frantovo.cz)

 */

public class XmlModule implements OutputModule {

	@Override

	public void process(OutputStream output, List<String> parameters) throws OutputModuleException {

		try (PrintWriter out = new PrintWriter(output)) {

			out.println("<parameters>");

			for (String parameter : parameters) {

				out.print("\t<parameter>");

				out.print(escapeXmlText(parameter));

				out.println("</parameter>");

				out.flush();

			}

			out.println("</parameters>");

		}

	}

	/**

	 * @param s original text

	 * @return escaped text that can be safely concatenated between two XML tags (not safe for

	 * attribute

	 * values)

	 */

	private static String escapeXmlText(String s) {

		return s.replaceAll("&", "&amp;").replaceAll("<", "&lt;").replaceAll(">", "&gt;");

	}

}