closes #481, moved bytearraysearcher to library

library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDVisualizer.java

@@ -148,10 +148,6 @@ public class ZUGFeRDVisualizer {
 		throws FileNotFoundException, TransformerException, IOException, SAXException, ParserConfigurationException {
 
 		try {
-			if (mXsltXRTemplate == null) {
-				mXsltXRTemplate = mFactory.newTemplates(
-					new StreamSource(CLASS_LOADER.getResourceAsStream(RESOURCE_PATH + "stylesheets/cii-xr.xsl")));
-			}
 			if (mXsltPDFTemplate == null) {
 				mXsltPDFTemplate = mFactory.newTemplates(
 					new StreamSource(CLASS_LOADER.getResourceAsStream(RESOURCE_PATH + "stylesheets/xr-pdf.xsl")));
@@ -247,6 +243,8 @@ public class ZUGFeRDVisualizer {
 
 		FileInputStream fis = new FileInputStream(xmlFilename);
 		EStandard theStandard= findOutStandardFromRootNode(fis);
+		fis = new FileInputStream(xmlFilename);//rewind :-(
+
 		try {
 			if (mXsltPDFTemplate == null) {
 				mXsltPDFTemplate = mFactory.newTemplates(
@@ -367,6 +365,11 @@ public class ZUGFeRDVisualizer {
 
 	protected void applyZF2XSLT(final InputStream xmlFile, final OutputStream HTMLOutstream)
 		throws TransformerException {
+		if (mXsltXRTemplate==null) {
+			mXsltXRTemplate = mFactory.newTemplates(
+				new StreamSource(CLASS_LOADER.getResourceAsStream(RESOURCE_PATH + "stylesheets/cii-xr.xsl")));
+
+		}
 		Transformer transformer = mXsltXRTemplate.newTransformer();
 
 		transformer.transform(new StreamSource(xmlFile), new StreamResult(HTMLOutstream));

library/src/main/java/org/mustangproject/util/ByteArraySearcher.java

@@ -0,0 +1,56 @@
+package org.mustangproject.util;
+
+public final class ByteArraySearcher {
+
+	private ByteArraySearcher() {
+	}
+
+	public static int indexOf(byte[] haystack, byte[] needle) {
+		if (needle.length > haystack.length) {
+			return -1;
+		}
+
+		// Any needle to search?
+		if (needle.length == 0) {
+			return -1;
+		}
+
+		for (int i = 0; i <= haystack.length - needle.length; i++) {
+			boolean found = true;
+			for (int j = 0; j < needle.length; j++) {
+				if (haystack[i + j] != needle[j]) {
+					found = false;
+					break;
+				}
+			}
+			if (found) {
+				return i;
+			}
+		}
+
+		return -1;
+	}
+
+	public static boolean contains(byte[] haystack, byte[] needle) {
+		return indexOf(haystack, needle) >= 0;
+	}
+
+	public static boolean startsWith(byte[] haystack, byte[] needle) {
+		if (needle.length > haystack.length) {
+			return false;
+		}
+
+		// Any needle to search?
+		if (needle.length == 0) {
+			return false;
+		}
+
+		for (int j = 0; j < needle.length; j++) {
+			if (haystack[j] != needle[j]) {
+				return false;
+			}
+		}
+
+		return true;
+	}
+}