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package sun.tools.jstat;

import java.util.*;

A typesafe enumeration for describing data alignment semantics
Author:Brian Doherty
Since:1.5
/** * 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
/** * 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
/** * 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
/** * 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.
Params:
  • s – an string to match against Alignment objects.
Returns: The Alignment object matching the given string.
/** * 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
Returns: Set of Key Words for this enumeration.
/** * 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); } }