| /* |
| * Copyright (C) 2009-2010, Google Inc. |
| * and other copyright owners as documented in the project's IP log. |
| * |
| * This program and the accompanying materials are made available |
| * under the terms of the Eclipse Distribution License v1.0 which |
| * accompanies this distribution, is reproduced below, and is |
| * available at http://www.eclipse.org/org/documents/edl-v10.php |
| * |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or |
| * without modification, are permitted provided that the following |
| * conditions are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials provided |
| * with the distribution. |
| * |
| * - Neither the name of the Eclipse Foundation, Inc. nor the |
| * names of its contributors may be used to endorse or promote |
| * products derived from this software without specific prior |
| * written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
| * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
| * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| package org.eclipse.jgit.util; |
| |
| /** Miscellaneous string comparison utility methods. */ |
| public final class StringUtils { |
| private static final char[] LC; |
| |
| static { |
| LC = new char['Z' + 1]; |
| for (char c = 0; c < LC.length; c++) |
| LC[c] = c; |
| for (char c = 'A'; c <= 'Z'; c++) |
| LC[c] = (char) ('a' + (c - 'A')); |
| } |
| |
| /** |
| * Convert the input to lowercase. |
| * <p> |
| * This method does not honor the JVM locale, but instead always behaves as |
| * though it is in the US-ASCII locale. Only characters in the range 'A' |
| * through 'Z' are converted. All other characters are left as-is, even if |
| * they otherwise would have a lowercase character equivalent. |
| * |
| * @param c |
| * the input character. |
| * @return lowercase version of the input. |
| */ |
| public static char toLowerCase(final char c) { |
| return c <= 'Z' ? LC[c] : c; |
| } |
| |
| /** |
| * Convert the input string to lower case, according to the "C" locale. |
| * <p> |
| * This method does not honor the JVM locale, but instead always behaves as |
| * though it is in the US-ASCII locale. Only characters in the range 'A' |
| * through 'Z' are converted, all other characters are left as-is, even if |
| * they otherwise would have a lowercase character equivalent. |
| * |
| * @param in |
| * the input string. Must not be null. |
| * @return a copy of the input string, after converting characters in the |
| * range 'A'..'Z' to 'a'..'z'. |
| */ |
| public static String toLowerCase(final String in) { |
| final StringBuilder r = new StringBuilder(in.length()); |
| for (int i = 0; i < in.length(); i++) |
| r.append(toLowerCase(in.charAt(i))); |
| return r.toString(); |
| } |
| |
| /** |
| * Test if two strings are equal, ignoring case. |
| * <p> |
| * This method does not honor the JVM locale, but instead always behaves as |
| * though it is in the US-ASCII locale. |
| * |
| * @param a |
| * first string to compare. |
| * @param b |
| * second string to compare. |
| * @return true if a equals b |
| */ |
| public static boolean equalsIgnoreCase(final String a, final String b) { |
| if (a == b) |
| return true; |
| if (a.length() != b.length()) |
| return false; |
| for (int i = 0; i < a.length(); i++) { |
| if (toLowerCase(a.charAt(i)) != toLowerCase(b.charAt(i))) |
| return false; |
| } |
| return true; |
| } |
| |
| /** |
| * Parse a string as a standard Git boolean value. |
| * <p> |
| * The terms {@code yes}, {@code true}, {@code 1}, {@code on} can all be |
| * used to mean {@code true}. |
| * <p> |
| * The terms {@code no}, {@code false}, {@code 0}, {@code off} can all be |
| * used to mean {@code false}. |
| * <p> |
| * Comparisons ignore case, via {@link #equalsIgnoreCase(String, String)}. |
| * |
| * @param stringValue |
| * the string to parse. |
| * @return the boolean interpretation of {@code value}. |
| * @throws IllegalArgumentException |
| * if {@code value} is not recognized as one of the standard |
| * boolean names. |
| */ |
| public static boolean toBoolean(final String stringValue) { |
| if (stringValue == null) |
| throw new NullPointerException("Expected boolean string value"); |
| |
| if (equalsIgnoreCase("yes", stringValue) |
| || equalsIgnoreCase("true", stringValue) |
| || equalsIgnoreCase("1", stringValue) |
| || equalsIgnoreCase("on", stringValue)) { |
| return true; |
| |
| } else if (equalsIgnoreCase("no", stringValue) |
| || equalsIgnoreCase("false", stringValue) |
| || equalsIgnoreCase("0", stringValue) |
| || equalsIgnoreCase("off", stringValue)) { |
| return false; |
| |
| } else { |
| throw new IllegalArgumentException("Not a boolean: " + stringValue); |
| } |
| } |
| |
| private StringUtils() { |
| // Do not create instances |
| } |
| } |