From 6025b6016517c6d898d8957d1d7e03ba71431912 Mon Sep 17 00:00:00 2001
From: tknall <tknall@7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c>
Date: Fri, 1 Dec 2006 12:20:24 +0000
Subject: Initial import of release 2.2.

git-svn-id: https://joinup.ec.europa.eu/svn/pdf-as/trunk@4 7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c
---
 .../knowcenter/wag/exactparser/ByteArrayUtils.java | 140 +++++++++++++++++++++
 1 file changed, 140 insertions(+)
 create mode 100644 src/main/java/at/knowcenter/wag/exactparser/ByteArrayUtils.java

(limited to 'src/main/java/at/knowcenter/wag/exactparser/ByteArrayUtils.java')

diff --git a/src/main/java/at/knowcenter/wag/exactparser/ByteArrayUtils.java b/src/main/java/at/knowcenter/wag/exactparser/ByteArrayUtils.java
new file mode 100644
index 0000000..e6b32ec
--- /dev/null
+++ b/src/main/java/at/knowcenter/wag/exactparser/ByteArrayUtils.java
@@ -0,0 +1,140 @@
+/**
+ * <copyright> Copyright (c) 2006 by Know-Center, Graz, Austria </copyright>
+ * 
+ * This software is the confidential and proprietary information of Know-Center,
+ * Graz, Austria. You shall not disclose such Confidential Information and shall
+ * use it only in accordance with the terms of the license agreement you entered
+ * into with Know-Center.
+ * 
+ * KNOW-CENTER MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
+ * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
+ * NON-INFRINGEMENT. KNOW-CENTER SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY
+ * LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
+ * DERIVATIVES.
+ * 
+ * $Id: ByteArrayUtils.java,v 1.1 2006/08/25 17:00:59 wprinz Exp $
+ */
+package at.knowcenter.wag.exactparser;
+
+import java.io.UnsupportedEncodingException;
+
+/**
+ * Abstract class that contains utility methods for handling byte arrays.
+ * 
+ * @author wprinz
+ */
+public abstract class ByteArrayUtils {
+
+  public static final String BYTE_ARRAY_ENCODING = "ISO-8859-1";
+
+  /**
+   * Converts the byte array to a String.
+   * 
+   * @param data
+   *          The byte array.
+   * @return Returns the String.
+   * @throws UnsupportedEncodingException
+   *           Forwarded exception
+   */
+  public static String convertByteArrayToString(final byte[] data) throws UnsupportedEncodingException {
+    return new String(data, BYTE_ARRAY_ENCODING);
+  }
+
+  /**
+   * Finds the first occurance of search in data starting to search from the
+   * given index.
+   * 
+   * @param data
+   *          The big array.
+   * @param index
+   *          The index to start searching from.
+   * @param search
+   *          The sought array.
+   * @return Returns the index of the found occurence or -1 if nothing was
+   *         found.
+   */
+  public static int indexOf(final byte[] data, final int index, final byte[] search) {
+    for (int i = index; i <= data.length - search.length; i++) {
+      if (compareByteArrays(data, i, search)) {
+        return i;
+      }
+    }
+    return -1;
+  }
+
+  /**
+   * Finds the last occurance of the array.
+   * 
+   * @param data
+   *          The source array to be searched.
+   * @param search
+   *          The sought array.
+   * @return Returns the index of the last occurance - or -1 if nothing was
+   *         found.
+   */
+  public static int lastIndexOf(final byte[] data, byte[] search) {
+    for (int index = data.length - search.length; index >= 0; index--) {
+      if (compareByteArrays(data, index, search)) {
+        return index;
+      }
+    }
+    return -1;
+  }
+
+  /**
+   * Compares the two byte arrays for equality.
+   * 
+   * @param data
+   *          The source array.
+   * @param index
+   *          In index into the source array marking where the comparison should
+   *          start.
+   * @param search
+   *          The sought array.
+   * @return Returns true if the first search.length bytes of data+index and
+   *         search match exactly. Returns false otherwise.
+   */
+  public static boolean compareByteArrays(final byte[] data, final int index, byte[] search) {
+    if (index < 0 || index >= data.length) {
+      throw new IndexOutOfBoundsException("The index " + index + " is out of bounds");
+    }
+
+    if (search.length > data.length) {
+      return false;
+    }
+
+    if (search.length > data.length - index) {
+      return false;
+    }
+
+    for (int i = 0; i < search.length; i++) {
+      if (data[index + i] != search[i]) {
+        return false;
+      }
+    }
+
+    return true;
+  }
+
+  /**
+   * Checks, if the sought data byte is contained within the byte array.
+   * 
+   * @param byte_array
+   *          The byte array.
+   * @param data
+   *          A data byte sought within the byte array.
+   * @return Returns true, if the data byte was found (at least once) in the
+   *         byte array, false otherwise.
+   */
+  public static boolean contains(final byte[] byte_array, final byte data) {
+    for (int i = 0; i < byte_array.length; i++) {
+      byte b =  byte_array[i];
+      if (b == data) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+}
-- 
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