| /* |
| * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.tools.jstat; |
| |
| import java.util.*; |
| |
| /** |
| * A typesafe enumeration for describing data alignment semantics |
| * |
| * @author Brian Doherty |
| * @since 1.5 |
| */ |
| public abstract class Alignment { |
| |
| private static int nextOrdinal = 0; |
| private static HashMap<String, Alignment> map = new HashMap<String, Alignment>(); |
| private static final String blanks = " "; |
| private final String name; |
| private final int value = nextOrdinal++; |
| |
| protected abstract String align(String s, int width); |
| |
| /** |
| * Alignment representing a Centered alignment |
| */ |
| public static final Alignment CENTER = new Alignment("center") { |
| protected String align(String s, int width) { |
| int length = s.length(); |
| if (length >= width) { |
| return s; |
| } |
| |
| int pad = width - length; |
| int pad2 = pad / 2; |
| int padr = pad % 2; |
| if (pad2 == 0) { |
| // only 0 or 1 character to pad |
| return s + blanks.substring(0, padr); |
| } else { |
| // pad on both sides |
| return blanks.substring(0, pad2) + s + |
| blanks.substring(0, pad2 + padr); |
| } |
| } |
| }; |
| |
| /** |
| * Alignment representing a Left alignment |
| */ |
| public static final Alignment LEFT = new Alignment("left") { |
| protected String align(String s, int width) { |
| int length = s.length(); |
| if (length >= width) { |
| return s; |
| } |
| int pad = width - length; |
| return s+blanks.substring(0, pad); |
| } |
| }; |
| |
| /** |
| * Alignment representing a Right alignment |
| */ |
| public static final Alignment RIGHT = new Alignment("right") { |
| protected String align(String s, int width) { |
| int length = s.length(); |
| if (length >= width) { |
| return s; |
| } |
| int pad = width - length; |
| return blanks.substring(0, pad) + s; |
| } |
| }; |
| |
| /** |
| * Maps a string value to its corresponding Alignment object. |
| * |
| * @param s an string to match against Alignment objects. |
| * @return The Alignment object matching the given string. |
| */ |
| public static Alignment toAlignment(String s) { |
| return map.get(s); |
| } |
| |
| /** |
| * Returns an enumeration of the keys for this enumerated type |
| * |
| * @return Set of Key Words for this enumeration. |
| */ |
| public static Set<String> keySet() { |
| return map.keySet(); |
| } |
| |
| public String toString() { |
| return name; |
| } |
| |
| private Alignment(String name) { |
| this.name = name; |
| map.put(name, this); |
| } |
| } |