| /* |
| * Copyright (c) 1998, 2020 Oracle and/or its affiliates. All rights reserved. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0 which is available at |
| * http://www.eclipse.org/legal/epl-2.0, |
| * or the Eclipse Distribution License v. 1.0 which is available at |
| * http://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause |
| */ |
| |
| // Contributors: |
| // Oracle - initial API and implementation from Oracle TopLink |
| package org.eclipse.persistence.internal.eis.cobol.helper; |
| |
| |
| /** |
| * <b>Purpose</b>: This class contains some simple methods that are helpful and used through |
| * the classes |
| */ |
| public class Helper { |
| |
| /** takes a string as an argument and returns the <code>Integer</code> value */ |
| public static Integer integerFromString(String string) { |
| Integer intValue; |
| try { |
| intValue = Integer.valueOf(string); |
| } catch (NumberFormatException exception) { |
| return null; |
| } |
| return intValue; |
| } |
| |
| /** takes a hex string representation and returns the Integer value */ |
| public static Integer integerFromHexString(String string) { |
| Integer intValue; |
| try { |
| intValue = Integer.valueOf(string, 16); |
| } catch (NumberFormatException exception) { |
| return null; |
| } |
| return intValue; |
| } |
| |
| public static byte byteFromString(String string) { |
| return Byte.valueOf(string).byteValue(); |
| } |
| |
| /** takes a hex string and returns an int value */ |
| public static int intFromHexString(String string) { |
| return integerFromHexString(string).intValue(); |
| } |
| |
| /** takes a byte and returns the Integer value */ |
| public static Integer integerFromByte(byte byteValue) { |
| return Integer.valueOf(intFromByte(byteValue)); |
| } |
| |
| /** takes a byte value and returns int value */ |
| public static int intFromByte(byte byteValue) { |
| Byte bigByte = Byte.valueOf(byteValue); |
| return bigByte.intValue(); |
| } |
| |
| /** takes a int an returns a byte */ |
| public static byte byteFromInt(int intValue) { |
| return Integer.valueOf(intValue).byteValue(); |
| } |
| |
| /** calculates a exponential value give the base and power */ |
| public static int power(int base, int power) { |
| int total = base; |
| if (power == 0) { |
| return 1; |
| } else if (power == 1) { |
| return base; |
| } else { |
| for (int i = 1; i < power; i++) { |
| total *= base; |
| } |
| } |
| return total; |
| } |
| } |