Add escape methods.

src/fr/devinsy/util/xml/XMLTools.java

@@ -16,6 +16,8 @@ import javax.xml.validation.Schema;
 import javax.xml.validation.SchemaFactory;
 import javax.xml.validation.Validator;
 
+import org.apache.commons.lang3.StringEscapeUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.xml.sax.InputSource;
 import org.xml.sax.SAXException;
 
@@ -28,6 +30,51 @@ import org.xml.sax.SAXException;
  */
 public class XMLTools
 {
+
+	/**
+	 * 
+	 * @param source
+	 * @return
+	 */
+	public String escapeXMLNull(final String source)
+	{
+		String result;
+
+		if (StringUtils.isBlank(source))
+		{
+			result = "";
+		}
+		else
+		{
+			result = StringEscapeUtils.escapeXml(source);
+		}
+
+		//
+		return result;
+	}
+
+	/**
+	 * 
+	 * @param source
+	 * @return
+	 */
+	public String unescapeXMLNull(final String source)
+	{
+		String result;
+
+		if (StringUtils.isBlank(source))
+		{
+			result = null;
+		}
+		else
+		{
+			result = StringEscapeUtils.unescapeXml(source);
+		}
+
+		//
+		return result;
+	}
+
 	/**
 	 * 
 	 *