01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17:
18: /* $Id$ */
19:
20: package org.apache.xmlgraphics.util;
21:
22: /**
23: * Provides helper functions for converting hexadecimal strings.
24: */
25: public class HexUtil {
26:
27: private static final char[] DIGITS = { '0', '1', '2', '3', '4',
28: '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
29:
30: /**
31: * Converts a byte array to a hexadecimal String
32: * @param data the data to encode
33: * @return String the resulting String
34: */
35: public static final String toHex(byte[] data) {
36: final StringBuffer sb = new StringBuffer(data.length * 2);
37: for (int i = 0; i < data.length; i++) {
38: sb.append(DIGITS[(data[i] >>> 4) & 0x0F]);
39: sb.append(DIGITS[data[i] & 0x0F]);
40: }
41: return sb.toString();
42: }
43:
44: }
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