org.apache.harmony.security.utils.Array Maven / Gradle / Ivy

/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

/**
* @author Vladimir N. Molotkov
* @version $Revision$
*/

package org.apache.harmony.security.utils;


/**
 * Utility class for arrays
 *
 */
public class Array {

    // No instances of this class
    private Array() {
    }

    public static String getBytesAsString(byte[] data) {
        StringBuilder result = new StringBuilder(data.length * 3);
        for (int i = 0; i < data.length; ++i) {
            result.append(Byte.toHexString(data[i], false));
            result.append(' ');
        }
        return result.toString();
    }

    /**
     * Represents array as String
     * for printing. Array length can be up to 32767
     *
     * @param array to be represented as String
     *
     * @return String representation of the array
     */
    public static String toString(byte[] array, String prefix) {
        // Prefixes to be added to the offset values
        // in String toString(byte[], String) method
        final String[] offsetPrefix = {
                "",
                "000",
                "00",
                "0",
                ""
        };
        StringBuilder sb = new StringBuilder();
        StringBuilder charForm = new StringBuilder();
        int i=0;
        for (i=0; i 8) {
                sb.append(' ');
            }
            sb.append("  ");
            sb.append(charForm.toString());
            sb.append('\n');
        }
        return sb.toString();
    }
}