fix Bug TDI-18747: With "tAvancedFileOutputXML" and generation mode "slow with no memory consumed" xml file generated is KO.

git-svn-id: http://talendforge.org/svn/tos/trunk@74110 f6f1c999-d317-4740-80b0-e6d1abc6f99e

org.talend.librariesmanager/resources/java/routines/system/XMLHelper.java

@@ -0,0 +1,60 @@
+package routines.system;
+
+import java.io.StringReader;
+
+import javax.xml.parsers.ParserConfigurationException;
+import javax.xml.parsers.SAXParserFactory;
+
+import org.xml.sax.InputSource;
+import org.xml.sax.SAXException;
+import org.xml.sax.XMLReader;
+
+/**
+ * helper for xml source
+ * @author Administrator
+ *
+ */
+public class XMLHelper {
+	
+	private static XMLHelper instance;
+	
+	private XMLReader reader;
+
+	private XMLHelper() {
+		SAXParserFactory factory = SAXParserFactory.newInstance();
+	    try {
+			reader = factory.newSAXParser().getXMLReader();
+			reader.setErrorHandler(null);
+		} catch (SAXException e) {
+			e.printStackTrace();
+		} catch (ParserConfigurationException e) {
+			e.printStackTrace();
+		}
+	}
+	
+	public static XMLHelper getInstance() {
+		if(instance == null) {
+			instance = new XMLHelper();
+		}
+		return instance;
+	}
+	
+	
+	
+	/**
+	 * validate xml source
+	 * return true if xml is well formed
+	 * @param source
+	 * @return
+	 */
+	public boolean isValid(String xml) {
+		try {
+			InputSource source = new InputSource(new StringReader(xml));
+			reader.parse(source);
+        	return true;
+        } catch(Exception e) {
+        	return false;
+        }
+	}
+	
+}