added readFile extfun and fixed matchFile

@ExternalFunction.Definitions(XmlDiffExtFctPlugin.class)

public class XmlDiffExtFctPlugin extends AnnotationsExternalFunctionPlugin {

	// external function matchFile(Raw p_textToMatch, universal charstring p_referenceXmlFile, XsdFileList p_xsdFileList, out universal charstring p_matchError) return boolean;

	/**

	 * Lexical compare the charstring p_textToMatch with the contents of the reference XML file and returns true if they represent the same XML structure

	 * @param p_textToMatch text to be compared with the UTF-8 contents of the XML file

	 * @param p_referenceXmlFile the XML file

	 * @param p_xsdFileList the list of XSD files

	 * @param p_matchError the error result in case it did not match

	 * @param p_referenceTTCN3File the file of the TTCN-3 test module. This path is used to find the reference XML file relative to this path, by keeping the TTCN-3 code file system independent.

	 * @return true if p_textToMatch and the contents of p_referenceXmlFile represent the same XML structure

	 */

 	// external function matchFile(Raw p_textToMatch, File p_referenceXmlFile, FileList p_xsdFileList, out universal charstring p_matchError, File p_referenceTTCN3File := __FILE__) return boolean;

	@ExternalFunction(name = "matchFile")

	public BooleanValue matchFile_2(UniversalCharstringValue p_textToMatch,

			UniversalCharstringValue p_referenceXmlFile, RecordOfValue xsdFileList, UniversalCharstringValue p_matchError) {

	public BooleanValue matchFile(UniversalCharstringValue p_textToMatch,

			UniversalCharstringValue p_referenceXmlFile, RecordOfValue xsdFileList, UniversalCharstringValue p_matchError, UniversalCharstringValue p_referenceTTCN3File) {

        String stringToMatch = p_textToMatch.getString();

        File parentFolder = new File(p_referenceTTCN3File.getString()).getAbsoluteFile().getParentFile();

        String strReferenceXmlFile = p_referenceXmlFile.getString();

        strReferenceXmlFile = new File(parentFolder, strReferenceXmlFile).getAbsolutePath();

        String[] xsdFileArray = null;

        if (xsdFileList.getLength() > 0) {

            xsdFileArray = new String[xsdFileList.getLength()];

            for(int i = 0; i < xsdFileList.getLength(); i++) {

                ((UniversalCharstringValue)xsdFileList.getField(i)).getString();

            	xsdFileArray[0] = ((UniversalCharstringValue)xsdFileList.getField(i)).getString();

            }

        }

        String description = "";

        boolean res = false;

        try {

            XmlDiff diff = new XmlDiff(strReferenceXmlFile, xsdFileArray, null);

            XmlDiff diff = new XmlDiff(strReferenceXmlFile, xsdFileArray, new String[]{parentFolder.getAbsolutePath()});

            StringBuilder sb = new StringBuilder();

            res = diff.diff(stringToMatch, sb);

            if (sb.length() > 0)

        return newBooleanValue(res);

    }

	//external function readFile(universal charstring p_referenceXmlFile) return universal charstring;

	/**

	 * Read a UTF-8 formated XML file from disc.

	 * @param p_referenceXmlFile the XML file

	 * @param p_referenceTTCN3File the file of the TTCN-3 test module. This path is used to find the reference XML file relative to this path, by keeping the TTCN-3 code file system independent.

	 * @return the UTF-8 contents of p_referenceXmlFile

	 */

	// external function readFile(universal charstring p_referenceXmlFile, universal charstring p_referenceTTCN3File := __FILE__) return universal charstring;

	@ExternalFunction(name = "readFile")

	public UniversalCharstringValue readFile(UniversalCharstringValue p_referenceXmlFile) {

	public UniversalCharstringValue readFile(UniversalCharstringValue p_referenceXmlFile, UniversalCharstringValue p_referenceTTCN3File) {

	    FileInputStream in = null;

	    try {

	      File file = new File(p_referenceXmlFile.getString());

		  File referenceTTCN3File = new File(p_referenceTTCN3File.getString());

		  String strReferenceXmlFile = p_referenceXmlFile.getString();

		  File file = new File(referenceTTCN3File.getAbsoluteFile().getParentFile(), strReferenceXmlFile);

	      in = new FileInputStream(file);

	      ByteArrayOutputStream out = new ByteArrayOutputStream(4096);

	      FileUtil.copy(in, out);