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src/main/java/tools/StringUtil.java

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+/*
+	This file is part of the OdinMS Maple Story Server
+    Copyright (C) 2008 Patrick Huy <patrick.huy@frz.cc>
+		       Matthias Butz <matze@odinms.de>
+		       Jan Christian Meyer <vimes@odinms.de>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as
+    published by the Free Software Foundation version 3 as published by
+    the Free Software Foundation. You may not use, modify or distribute
+    this program under any other version of the GNU Affero General Public
+    License.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+package tools;
+
+public class StringUtil {
+	/**
+	 * Gets a string padded from the left to <code>length</code> by
+	 * <code>padchar</code>.
+	 *
+	 * @param in The input string to be padded.
+	 * @param padchar The character to pad with.
+	 * @param length The length to pad to.
+	 * @return The padded string.
+	 */
+	public static String getLeftPaddedStr(String in, char padchar, int length) {
+		StringBuilder builder = new StringBuilder(length);
+		for (int x = in.length(); x < length; x++) {
+			builder.append(padchar);
+		}
+		builder.append(in);
+		return builder.toString();
+	}
+
+	/**
+	 * Gets a string padded from the right to <code>length</code> by
+	 * <code>padchar</code>.
+	 *
+	 * @param in The input string to be padded.
+	 * @param padchar The character to pad with.
+	 * @param length The length to pad to.
+	 * @return The padded string.
+	 */
+	public static String getRightPaddedStr(String in, char padchar, int length) {
+		StringBuilder builder = new StringBuilder(in);
+		for (int x = in.length(); x < length; x++) {
+			builder.append(padchar);
+		}
+		return builder.toString();
+	}
+
+	/**
+	 * Joins an array of strings starting from string <code>start</code> with
+	 * a space.
+	 *
+	 * @param arr The array of strings to join.
+	 * @param start Starting from which string.
+	 * @return The joined strings.
+	 */
+	public static String joinStringFrom(String arr[], int start) {
+		return joinStringFrom(arr, start, " ");
+	}
+
+	/**
+	 * Joins an array of strings starting from string <code>start</code> with
+	 * <code>sep</code> as a seperator.
+	 *
+	 * @param arr The array of strings to join.
+	 * @param start Starting from which string.
+	 * @return The joined strings.
+	 */
+	public static String joinStringFrom(String arr[], int start, String sep) {
+		StringBuilder builder = new StringBuilder();
+		for (int i = start; i < arr.length; i++) {
+			builder.append(arr[i]);
+			if (i != arr.length - 1) {
+				builder.append(sep);
+			}
+		}
+		return builder.toString();
+	}
+
+	/**
+	 * Makes an enum name human readable (fixes spaces, capitalization, etc)
+	 *
+	 * @param enumName The name of the enum to neaten up.
+	 * @return The human-readable enum name.
+	 */
+	public static String makeEnumHumanReadable(String enumName) {
+		StringBuilder builder = new StringBuilder(enumName.length() + 1);
+		String[] words = enumName.split("_");
+		for (String word : words) {
+			if (word.length() <= 2) {
+				builder.append(word); // assume that it's an abbrevation
+			} else {
+				builder.append(word.charAt(0));
+				builder.append(word.substring(1).toLowerCase());
+			}
+			builder.append(' ');
+		}
+		return builder.substring(0, enumName.length());
+	}
+
+	/**
+	 * Counts the number of <code>chr</code>'s in <code>str</code>.
+	 *
+	 * @param str The string to check for instances of <code>chr</code>.
+	 * @param chr The character to check for.
+	 * @return The number of times <code>chr</code> occurs in <code>str</code>.
+	 */
+	public static int countCharacters(String str, char chr) {
+		int ret = 0;
+		for (int i = 0; i < str.length(); i++) {
+			if (str.charAt(i) == chr) {
+				ret++;
+			}
+		}
+		return ret;
+	}
+}