method that allows to lowercase xml names created

commons/src/main/java/lcsb/mapviewer/common/XmlParser.java

@@ -2,6 +2,8 @@ package lcsb.mapviewer.common;
 
 import java.awt.Color;
 import java.io.BufferedReader;
+import java.io.ByteArrayInputStream;
+import java.io.FileInputStream;
 import java.io.FileReader;
 import java.io.IOException;
 import java.io.InputStream;
@@ -14,13 +16,18 @@ import javax.xml.parsers.DocumentBuilder;
 import javax.xml.parsers.DocumentBuilderFactory;
 import javax.xml.parsers.ParserConfigurationException;
 import javax.xml.transform.OutputKeys;
+import javax.xml.transform.Result;
+import javax.xml.transform.Source;
+import javax.xml.transform.Templates;
 import javax.xml.transform.Transformer;
 import javax.xml.transform.TransformerException;
 import javax.xml.transform.TransformerFactory;
 import javax.xml.transform.dom.DOMSource;
 import javax.xml.transform.stream.StreamResult;
+import javax.xml.transform.stream.StreamSource;
 
 import org.apache.commons.io.IOUtils;
+import org.apache.commons.io.output.ByteArrayOutputStream;
 import org.apache.commons.text.StringEscapeUtils;
 import org.apache.log4j.Logger;
 import org.w3c.dom.Document;
@@ -31,6 +38,7 @@ import org.xml.sax.InputSource;
 import org.xml.sax.SAXException;
 
 import lcsb.mapviewer.common.exception.InvalidArgumentException;
+import lcsb.mapviewer.common.exception.InvalidStateException;
 import lcsb.mapviewer.common.exception.InvalidXmlSchemaException;
 
 /**
@@ -78,7 +86,8 @@ final public class XmlParser {
   }
 
   /**
-   * private constructor. This class has no state and contains only static utility methods.
+   * private constructor. This class has no state and contains only static utility
+   * methods.
    */
   private XmlParser() {
   }
@@ -222,7 +231,8 @@ final public class XmlParser {
    * @throws InvalidXmlSchemaException
    *           thrown when there is a problem with xml
    */
-  public static Document getXmlDocumentFromString(final String text, boolean validate) throws InvalidXmlSchemaException {
+  public static Document getXmlDocumentFromString(final String text, boolean validate)
+      throws InvalidXmlSchemaException {
     InputSource is = new InputSource();
     is.setCharacterStream(new StringReader(text));
     try {
@@ -398,4 +408,29 @@ final public class XmlParser {
     }
     return result;
   }
+
+  public static String lowercaseXmlNames(String inputXml) {
+    try {
+      TransformerFactory factory = TransformerFactory.newInstance();
+
+      // Use the factory to create a template containing the xsl file
+      Templates template = factory.newTemplates(new StreamSource(ClassLoader.getSystemResourceAsStream("to_lowercase.xsl")));
+
+      // Use the template to create a transformer
+      Transformer xformer = template.newTransformer();
+
+      ByteArrayOutputStream output = new ByteArrayOutputStream();
+      // Prepare the input and output files
+      Source source = new StreamSource(new ByteArrayInputStream(inputXml.getBytes()));
+      Result result = new StreamResult(output);
+
+      // Apply the xsl file to the source file and write the result
+      // to the output file
+      xformer.transform(source, result);
+      return output.toString("UTF-8");
+    } catch (Exception e ) {
+      throw new InvalidStateException("Problem with translating input xml", e);
+    }
+  }
+
 }

commons/src/main/resources/to_lowercase.xsl

+<?xml version="1.0" encoding="ISO-8859-1"?>
+<xsl:stylesheet version="1.0"
+ xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
+    <xsl:variable
+       name="lcase">abcdefghijklmnopqrstuvwxyz</xsl:variable>
+    <xsl:variable
+       name="ucase">ABCDEFGHIJKLMNOPQRSTUVWXYZ</xsl:variable>
+    
+    <xsl:template match="@*|node()">
+        <xsl:copy>
+            <xsl:apply-templates select="@*|node()"/>
+        </xsl:copy>
+    </xsl:template>
+    <xsl:template match="*">
+        <xsl:element name="{translate(local-name(),$ucase,$lcase)}">
+            <xsl:apply-templates select="@*|node()"/>
+        </xsl:element>
+    </xsl:template>
+    
+</xsl:stylesheet>

commons/src/test/java/lcsb/mapviewer/common/XmlParserTest.java

@@ -149,7 +149,7 @@ public class XmlParserTest {
   }
 
   boolean threadSucceded;
-  
+
   @Test
   public void testConcurrencyParse() throws Exception {
     try {
@@ -182,7 +182,6 @@ public class XmlParserTest {
 
   }
 
-
   @Test
   public void testInvalidNodeToString() throws Exception {
     try {
@@ -451,4 +450,19 @@ public class XmlParserTest {
       throw e;
     }
   }
+
+  @Test
+  public void testLowercaseXmlNames() throws Exception {
+    try {
+      String inputXml = "<node><ASD>Test</ASD></node>";
+      String outputXml = XmlParser.lowercaseXmlNames(inputXml);
+
+      assertTrue(outputXml.indexOf("asd") >= 0);
+      assertTrue(outputXml.indexOf("Test") >= 0);
+
+    } catch (Exception e) {
+      e.printStackTrace();
+      throw e;
+    }
+  }
 }