1020 lines
26 KiB
Java
1020 lines
26 KiB
Java
/* DecimalFormat.java -- Formats and parses numbers
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Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.text;
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import java.util.Locale;
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import java.util.MissingResourceException;
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import java.util.ResourceBundle;
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import java.io.ObjectInputStream;
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import java.io.IOException;
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/**
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* @author Tom Tromey <tromey@cygnus.com>
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* @date March 4, 1999
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*/
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/* Written using "Java Class Libraries", 2nd edition, plus online
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* API docs for JDK 1.2 from http://www.javasoft.com.
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* Status: Believed complete and correct to 1.2.
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* Note however that the docs are very unclear about how format parsing
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* should work. No doubt there are problems here.
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*/
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public class DecimalFormat extends NumberFormat
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{
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// This is a helper for applyPatternWithSymbols. It reads a prefix
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// or a suffix. It can cause some side-effects.
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private final int scanFix (String pattern, int index, StringBuffer buf,
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String patChars, DecimalFormatSymbols syms,
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boolean is_suffix)
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{
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int len = pattern.length();
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buf.setLength(0);
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boolean multiplierSet = false;
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while (index < len)
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{
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char c = pattern.charAt(index);
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if (c == '\'' && index + 1 < len
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&& pattern.charAt(index + 1) == '\'')
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{
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buf.append(c);
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++index;
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}
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else if (c == '\'' && index + 2 < len
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&& pattern.charAt(index + 2) == '\'')
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{
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buf.append(pattern.charAt(index + 1));
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index += 2;
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}
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else if (c == '\u00a4')
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{
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if (index + 1 < len && pattern.charAt(index + 1) == '\u00a4')
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{
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buf.append(syms.getInternationalCurrencySymbol());
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++index;
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}
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else
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buf.append(syms.getCurrencySymbol());
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}
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else if (is_suffix && c == syms.getPercent())
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{
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if (multiplierSet)
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throw new IllegalArgumentException ("multiplier already set " +
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"- index: " + index);
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multiplierSet = true;
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multiplier = 100;
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buf.append(c);
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}
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else if (is_suffix && c == syms.getPerMill())
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{
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if (multiplierSet)
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throw new IllegalArgumentException ("multiplier already set " +
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"- index: " + index);
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multiplierSet = true;
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multiplier = 1000;
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buf.append(c);
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}
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else if (patChars.indexOf(c) != -1)
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{
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// This is a pattern character.
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break;
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}
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else
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buf.append(c);
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++index;
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}
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return index;
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}
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// A helper which reads a number format.
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private final int scanFormat (String pattern, int index,
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String patChars, DecimalFormatSymbols syms,
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boolean is_positive)
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{
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int max = pattern.length();
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int countSinceGroup = 0;
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int zeroCount = 0;
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boolean saw_group = false;
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//
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// Scan integer part.
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//
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while (index < max)
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{
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char c = pattern.charAt(index);
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if (c == syms.getDigit())
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{
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if (zeroCount > 0)
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throw new IllegalArgumentException ("digit mark following " +
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"zero - index: " + index);
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++countSinceGroup;
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}
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else if (c == syms.getZeroDigit())
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{
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++zeroCount;
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++countSinceGroup;
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}
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else if (c == syms.getGroupingSeparator())
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{
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countSinceGroup = 0;
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saw_group = true;
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}
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else
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break;
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++index;
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}
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// We can only side-effect when parsing the positive format.
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if (is_positive)
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{
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groupingUsed = saw_group;
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groupingSize = (byte) countSinceGroup;
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minimumIntegerDigits = zeroCount;
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}
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// Early termination.
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if (index == max || pattern.charAt(index) == syms.getGroupingSeparator())
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{
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if (is_positive)
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decimalSeparatorAlwaysShown = false;
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return index;
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}
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if (pattern.charAt(index) == syms.getDecimalSeparator())
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{
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++index;
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//
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// Scan fractional part.
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//
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int hashCount = 0;
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zeroCount = 0;
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while (index < max)
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{
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char c = pattern.charAt(index);
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if (c == syms.getZeroDigit())
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{
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if (hashCount > 0)
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throw new IllegalArgumentException ("zero mark " +
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"following digit - index: " + index);
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++zeroCount;
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}
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else if (c == syms.getDigit())
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{
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++hashCount;
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}
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else if (c != syms.getExponential()
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&& c != syms.getPatternSeparator()
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&& patChars.indexOf(c) != -1)
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throw new IllegalArgumentException ("unexpected special " +
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"character - index: " + index);
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else
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break;
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++index;
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}
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if (is_positive)
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{
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maximumFractionDigits = hashCount + zeroCount;
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minimumFractionDigits = zeroCount;
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}
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if (index == max)
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return index;
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}
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if (pattern.charAt(index) == syms.getExponential())
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{
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//
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// Scan exponential format.
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//
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zeroCount = 0;
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++index;
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while (index < max)
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{
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char c = pattern.charAt(index);
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if (c == syms.getZeroDigit())
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++zeroCount;
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else if (c == syms.getDigit())
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{
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if (zeroCount > 0)
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throw new
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IllegalArgumentException ("digit mark following zero " +
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"in exponent - index: " +
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index);
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}
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else if (patChars.indexOf(c) != -1)
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throw new IllegalArgumentException ("unexpected special " +
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"character - index: " +
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index);
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else
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break;
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++index;
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}
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if (is_positive)
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{
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useExponentialNotation = true;
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minExponentDigits = (byte) zeroCount;
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}
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}
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return index;
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}
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// This helper function creates a string consisting of all the
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// characters which can appear in a pattern and must be quoted.
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private final String patternChars (DecimalFormatSymbols syms)
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{
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StringBuffer buf = new StringBuffer ();
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buf.append(syms.getDecimalSeparator());
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buf.append(syms.getDigit());
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buf.append(syms.getExponential());
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buf.append(syms.getGroupingSeparator());
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// Adding this one causes pattern application to fail.
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// Of course, omitting is causes toPattern to fail.
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// ... but we already have bugs there. FIXME.
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// buf.append(syms.getMinusSign());
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buf.append(syms.getPatternSeparator());
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buf.append(syms.getPercent());
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buf.append(syms.getPerMill());
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buf.append(syms.getZeroDigit());
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buf.append('\u00a4');
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return buf.toString();
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}
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private final void applyPatternWithSymbols (String pattern,
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DecimalFormatSymbols syms)
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{
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// Initialize to the state the parser expects.
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negativePrefix = "";
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negativeSuffix = "";
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positivePrefix = "";
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positiveSuffix = "";
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decimalSeparatorAlwaysShown = false;
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groupingSize = 0;
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minExponentDigits = 0;
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multiplier = 1;
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useExponentialNotation = false;
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groupingUsed = false;
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maximumFractionDigits = 0;
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maximumIntegerDigits = 309;
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minimumFractionDigits = 0;
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minimumIntegerDigits = 1;
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StringBuffer buf = new StringBuffer ();
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String patChars = patternChars (syms);
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int max = pattern.length();
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int index = scanFix (pattern, 0, buf, patChars, syms, false);
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positivePrefix = buf.toString();
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index = scanFormat (pattern, index, patChars, syms, true);
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index = scanFix (pattern, index, buf, patChars, syms, true);
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positiveSuffix = buf.toString();
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if (index == pattern.length())
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{
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// No negative info.
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negativePrefix = null;
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negativeSuffix = null;
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}
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else
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{
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if (pattern.charAt(index) != syms.getPatternSeparator())
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throw new IllegalArgumentException ("separator character " +
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"expected - index: " + index);
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index = scanFix (pattern, index + 1, buf, patChars, syms, false);
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negativePrefix = buf.toString();
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// We parse the negative format for errors but we don't let
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// it side-effect this object.
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index = scanFormat (pattern, index, patChars, syms, false);
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index = scanFix (pattern, index, buf, patChars, syms, true);
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negativeSuffix = buf.toString();
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if (index != pattern.length())
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throw new IllegalArgumentException ("end of pattern expected " +
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"- index: " + index);
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}
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}
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public void applyLocalizedPattern (String pattern)
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{
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// JCL p. 638 claims this throws a ParseException but p. 629
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// contradicts this. Empirical tests with patterns of "0,###.0"
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// and "#.#.#" corroborate the p. 629 statement that an
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// IllegalArgumentException is thrown.
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applyPatternWithSymbols (pattern, symbols);
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}
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public void applyPattern (String pattern)
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{
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// JCL p. 638 claims this throws a ParseException but p. 629
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// contradicts this. Empirical tests with patterns of "0,###.0"
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// and "#.#.#" corroborate the p. 629 statement that an
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// IllegalArgumentException is thrown.
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applyPatternWithSymbols (pattern, nonLocalizedSymbols);
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}
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public Object clone ()
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{
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DecimalFormat c = (DecimalFormat) super.clone ();
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c.symbols = (DecimalFormatSymbols) symbols.clone ();
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return c;
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}
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public DecimalFormat ()
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{
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this ("#,##0.###");
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}
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public DecimalFormat (String pattern)
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{
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this (pattern, new DecimalFormatSymbols ());
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}
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public DecimalFormat (String pattern, DecimalFormatSymbols symbols)
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{
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this.symbols = symbols;
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applyPattern (pattern);
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}
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private final boolean equals (String s1, String s2)
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{
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if (s1 == null || s2 == null)
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return s1 == s2;
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return s1.equals(s2);
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}
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public boolean equals (Object obj)
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{
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if (! (obj instanceof DecimalFormat))
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return false;
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DecimalFormat dup = (DecimalFormat) obj;
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return (decimalSeparatorAlwaysShown == dup.decimalSeparatorAlwaysShown
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&& groupingSize == dup.groupingSize
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&& minExponentDigits == dup.minExponentDigits
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&& multiplier == dup.multiplier
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&& equals(negativePrefix, dup.negativePrefix)
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&& equals(negativeSuffix, dup.negativeSuffix)
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&& equals(positivePrefix, dup.positivePrefix)
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&& equals(positiveSuffix, dup.positiveSuffix)
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&& symbols.equals(dup.symbols)
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&& useExponentialNotation == dup.useExponentialNotation);
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}
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public StringBuffer format (double number, StringBuffer dest,
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FieldPosition fieldPos)
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{
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// A very special case.
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if (Double.isNaN(number))
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{
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dest.append(symbols.getNaN());
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if (fieldPos != null && fieldPos.getField() == INTEGER_FIELD)
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{
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int index = dest.length();
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fieldPos.setBeginIndex(index - symbols.getNaN().length());
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fieldPos.setEndIndex(index);
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}
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return dest;
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}
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boolean is_neg = number < 0;
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if (is_neg)
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{
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if (negativePrefix != null)
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dest.append(negativePrefix);
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else
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{
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dest.append(symbols.getMinusSign());
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dest.append(positivePrefix);
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}
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number = - number;
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}
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else
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dest.append(positivePrefix);
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int integerBeginIndex = dest.length();
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int integerEndIndex = 0;
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if (Double.isInfinite (number))
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{
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dest.append(symbols.getInfinity());
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integerEndIndex = dest.length();
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}
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else
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{
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number *= multiplier;
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// Compute exponent.
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long exponent = 0;
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double baseNumber;
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if (useExponentialNotation)
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{
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exponent = (long) Math.floor (Math.log(number) / Math.log(10));
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if (minimumIntegerDigits > 0)
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exponent -= minimumIntegerDigits - 1;
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baseNumber = (long) (number / Math.pow(10.0, exponent));
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}
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else
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baseNumber = number;
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// Round to the correct number of digits.
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baseNumber += 5 * Math.pow(10.0, - maximumFractionDigits - 1);
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int index = dest.length();
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double intPart = Math.floor(baseNumber);
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int count = 0;
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while (count < maximumIntegerDigits
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&& (intPart > 0 || count < minimumIntegerDigits))
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{
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long dig = (long) (intPart % 10);
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intPart = Math.floor(intPart / 10);
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// Append group separator if required.
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if (groupingUsed && count > 0 && count % groupingSize == 0)
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dest.insert(index, symbols.getGroupingSeparator());
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dest.insert(index, (char) (symbols.getZeroDigit() + dig));
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++count;
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}
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integerEndIndex = dest.length();
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int decimal_index = integerEndIndex;
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int consecutive_zeros = 0;
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int total_digits = 0;
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// Strip integer part from NUMBER.
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double fracPart = baseNumber - Math.floor(baseNumber);
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for (count = 0;
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count < maximumFractionDigits
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&& (fracPart != 0 || count < minimumFractionDigits);
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++count)
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{
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++total_digits;
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fracPart *= 10;
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long dig = (long) fracPart;
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if (dig == 0)
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++consecutive_zeros;
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else
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consecutive_zeros = 0;
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dest.append((char) (symbols.getZeroDigit() + dig));
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// Strip integer part from FRACPART.
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fracPart = fracPart - Math.floor (fracPart);
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}
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// Strip extraneous trailing `0's. We can't always detect
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// these in the loop.
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int extra_zeros = Math.min (consecutive_zeros,
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total_digits - minimumFractionDigits);
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if (extra_zeros > 0)
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{
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dest.setLength(dest.length() - extra_zeros);
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total_digits -= extra_zeros;
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}
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|
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// If required, add the decimal symbol.
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if (decimalSeparatorAlwaysShown
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|| total_digits > 0)
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{
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dest.insert(decimal_index, symbols.getDecimalSeparator());
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if (fieldPos != null && fieldPos.getField() == FRACTION_FIELD)
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{
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fieldPos.setBeginIndex(decimal_index + 1);
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fieldPos.setEndIndex(dest.length());
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}
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}
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// Finally, print the exponent.
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if (useExponentialNotation)
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{
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dest.append(symbols.getExponential());
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if (exponent < 0)
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{
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dest.append (symbols.getMinusSign ());
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exponent = - exponent;
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}
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index = dest.length();
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for (count = 0;
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exponent > 0 || count < minExponentDigits;
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++count)
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{
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long dig = exponent % 10;
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exponent /= 10;
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dest.insert(index, (char) (symbols.getZeroDigit() + dig));
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}
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}
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}
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if (fieldPos != null && fieldPos.getField() == INTEGER_FIELD)
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{
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fieldPos.setBeginIndex(integerBeginIndex);
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fieldPos.setEndIndex(integerEndIndex);
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}
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dest.append((is_neg && negativeSuffix != null)
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? negativeSuffix
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: positiveSuffix);
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return dest;
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}
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|
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public StringBuffer format (long number, StringBuffer dest,
|
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FieldPosition fieldPos)
|
|
{
|
|
// If using exponential notation, we just format as a double.
|
|
if (useExponentialNotation)
|
|
return format ((double) number, dest, fieldPos);
|
|
|
|
boolean is_neg = number < 0;
|
|
if (is_neg)
|
|
{
|
|
if (negativePrefix != null)
|
|
dest.append(negativePrefix);
|
|
else
|
|
{
|
|
dest.append(symbols.getMinusSign());
|
|
dest.append(positivePrefix);
|
|
}
|
|
number = - number;
|
|
}
|
|
else
|
|
dest.append(positivePrefix);
|
|
|
|
int integerBeginIndex = dest.length();
|
|
int index = dest.length();
|
|
int count = 0;
|
|
while (count < maximumIntegerDigits
|
|
&& (number > 0 || count < minimumIntegerDigits))
|
|
{
|
|
long dig = number % 10;
|
|
number /= 10;
|
|
// NUMBER and DIG will be less than 0 if the original number
|
|
// was the most negative long.
|
|
if (dig < 0)
|
|
{
|
|
dig = - dig;
|
|
number = - number;
|
|
}
|
|
|
|
// Append group separator if required.
|
|
if (groupingUsed && count > 0 && count % groupingSize == 0)
|
|
dest.insert(index, symbols.getGroupingSeparator());
|
|
|
|
dest.insert(index, (char) (symbols.getZeroDigit() + dig));
|
|
|
|
++count;
|
|
}
|
|
|
|
if (fieldPos != null && fieldPos.getField() == INTEGER_FIELD)
|
|
{
|
|
fieldPos.setBeginIndex(integerBeginIndex);
|
|
fieldPos.setEndIndex(dest.length());
|
|
}
|
|
|
|
if (decimalSeparatorAlwaysShown || minimumFractionDigits > 0)
|
|
{
|
|
dest.append(symbols.getDecimalSeparator());
|
|
if (fieldPos != null && fieldPos.getField() == FRACTION_FIELD)
|
|
{
|
|
fieldPos.setBeginIndex(dest.length());
|
|
fieldPos.setEndIndex(dest.length() + minimumFractionDigits);
|
|
}
|
|
}
|
|
|
|
for (count = 0; count < minimumFractionDigits; ++count)
|
|
dest.append(symbols.getZeroDigit());
|
|
|
|
dest.append((is_neg && negativeSuffix != null)
|
|
? negativeSuffix
|
|
: positiveSuffix);
|
|
return dest;
|
|
}
|
|
|
|
public DecimalFormatSymbols getDecimalFormatSymbols ()
|
|
{
|
|
return symbols;
|
|
}
|
|
|
|
public int getGroupingSize ()
|
|
{
|
|
return groupingSize;
|
|
}
|
|
|
|
public int getMultiplier ()
|
|
{
|
|
return multiplier;
|
|
}
|
|
|
|
public String getNegativePrefix ()
|
|
{
|
|
return negativePrefix;
|
|
}
|
|
|
|
public String getNegativeSuffix ()
|
|
{
|
|
return negativeSuffix;
|
|
}
|
|
|
|
public String getPositivePrefix ()
|
|
{
|
|
return positivePrefix;
|
|
}
|
|
|
|
public String getPositiveSuffix ()
|
|
{
|
|
return positiveSuffix;
|
|
}
|
|
|
|
public int hashCode ()
|
|
{
|
|
int hash = (negativeSuffix.hashCode() ^ negativePrefix.hashCode()
|
|
^positivePrefix.hashCode() ^ positiveSuffix.hashCode());
|
|
// FIXME.
|
|
return hash;
|
|
}
|
|
|
|
public boolean isDecimalSeparatorAlwaysShown ()
|
|
{
|
|
return decimalSeparatorAlwaysShown;
|
|
}
|
|
|
|
public Number parse (String str, ParsePosition pos)
|
|
{
|
|
// Our strategy is simple: copy the text into a buffer,
|
|
// translating or omitting locale-specific information. Then
|
|
// let Double or Long convert the number for us.
|
|
|
|
boolean is_neg = false;
|
|
int index = pos.getIndex();
|
|
StringBuffer buf = new StringBuffer ();
|
|
|
|
// We have to check both prefixes, because one might be empty.
|
|
// We want to pick the longest prefix that matches.
|
|
boolean got_pos = str.startsWith(positivePrefix, index);
|
|
String np = (negativePrefix != null
|
|
? negativePrefix
|
|
: positivePrefix + symbols.getMinusSign());
|
|
boolean got_neg = str.startsWith(np, index);
|
|
|
|
if (got_pos && got_neg)
|
|
{
|
|
// By checking this way, we preserve ambiguity in the case
|
|
// where the negative format differs only in suffix. We
|
|
// check this again later.
|
|
if (np.length() > positivePrefix.length())
|
|
{
|
|
is_neg = true;
|
|
index += np.length();
|
|
}
|
|
else
|
|
index += positivePrefix.length();
|
|
}
|
|
else if (got_neg)
|
|
{
|
|
is_neg = true;
|
|
index += np.length();
|
|
}
|
|
else if (got_pos)
|
|
index += positivePrefix.length();
|
|
else
|
|
{
|
|
pos.setErrorIndex (index);
|
|
return null;
|
|
}
|
|
|
|
// FIXME: handle Inf and NaN.
|
|
|
|
// FIXME: do we have to respect minimum/maxmimum digit stuff?
|
|
// What about leading zeros? What about multiplier?
|
|
|
|
int start_index = index;
|
|
int max = str.length();
|
|
char zero = symbols.getZeroDigit();
|
|
int last_group = -1;
|
|
boolean int_part = true;
|
|
boolean exp_part = false;
|
|
for (; index < max; ++index)
|
|
{
|
|
char c = str.charAt(index);
|
|
|
|
// FIXME: what about grouping size?
|
|
if (groupingUsed && c == symbols.getGroupingSeparator())
|
|
{
|
|
if (last_group != -1
|
|
&& (index - last_group) % groupingSize != 0)
|
|
{
|
|
pos.setErrorIndex(index);
|
|
return null;
|
|
}
|
|
last_group = index;
|
|
}
|
|
else if (c >= zero && c <= zero + 9)
|
|
{
|
|
buf.append((char) (c - zero + '0'));
|
|
exp_part = false;
|
|
}
|
|
else if (parseIntegerOnly)
|
|
break;
|
|
else if (c == symbols.getDecimalSeparator())
|
|
{
|
|
if (last_group != -1
|
|
&& (index - last_group) % groupingSize != 0)
|
|
{
|
|
pos.setErrorIndex(index);
|
|
return null;
|
|
}
|
|
buf.append('.');
|
|
int_part = false;
|
|
}
|
|
else if (c == symbols.getExponential())
|
|
{
|
|
buf.append('E');
|
|
int_part = false;
|
|
exp_part = true;
|
|
}
|
|
else if (exp_part
|
|
&& (c == '+' || c == '-' || c == symbols.getMinusSign()))
|
|
{
|
|
// For exponential notation.
|
|
buf.append(c);
|
|
}
|
|
else
|
|
break;
|
|
}
|
|
|
|
if (index == start_index)
|
|
{
|
|
// Didn't see any digits.
|
|
pos.setErrorIndex(index);
|
|
return null;
|
|
}
|
|
|
|
// Check the suffix. We must do this before converting the
|
|
// buffer to a number to handle the case of a number which is
|
|
// the most negative Long.
|
|
boolean got_pos_suf = str.startsWith(positiveSuffix, index);
|
|
String ns = (negativePrefix == null ? positiveSuffix : negativeSuffix);
|
|
boolean got_neg_suf = str.startsWith(ns, index);
|
|
if (is_neg)
|
|
{
|
|
if (! got_neg_suf)
|
|
{
|
|
pos.setErrorIndex(index);
|
|
return null;
|
|
}
|
|
}
|
|
else if (got_pos && got_neg && got_neg_suf)
|
|
{
|
|
is_neg = true;
|
|
}
|
|
else if (got_pos != got_pos_suf && got_neg != got_neg_suf)
|
|
{
|
|
pos.setErrorIndex(index);
|
|
return null;
|
|
}
|
|
|
|
String suffix = is_neg ? ns : positiveSuffix;
|
|
if (is_neg)
|
|
buf.insert(0, '-');
|
|
|
|
String t = buf.toString();
|
|
Number result = null;
|
|
try
|
|
{
|
|
result = new Long (t);
|
|
}
|
|
catch (NumberFormatException x1)
|
|
{
|
|
try
|
|
{
|
|
result = new Double (t);
|
|
}
|
|
catch (NumberFormatException x2)
|
|
{
|
|
}
|
|
}
|
|
if (result == null)
|
|
{
|
|
pos.setErrorIndex(index);
|
|
return null;
|
|
}
|
|
|
|
pos.setIndex(index + suffix.length());
|
|
|
|
return result;
|
|
}
|
|
|
|
public void setDecimalFormatSymbols (DecimalFormatSymbols newSymbols)
|
|
{
|
|
symbols = newSymbols;
|
|
}
|
|
|
|
public void setDecimalSeparatorAlwaysShown (boolean newValue)
|
|
{
|
|
decimalSeparatorAlwaysShown = newValue;
|
|
}
|
|
|
|
public void setGroupingSize (int groupSize)
|
|
{
|
|
groupingSize = (byte) groupSize;
|
|
}
|
|
|
|
public void setMaximumFractionDigits (int newValue)
|
|
{
|
|
maximumFractionDigits = Math.min(newValue, 340);
|
|
}
|
|
|
|
public void setMaximumIntegerDigits (int newValue)
|
|
{
|
|
maximumIntegerDigits = Math.min(newValue, 309);
|
|
}
|
|
|
|
public void setMinimumFractionDigits (int newValue)
|
|
{
|
|
minimumFractionDigits = Math.min(newValue, 340);
|
|
}
|
|
|
|
public void setMinimumIntegerDigits (int newValue)
|
|
{
|
|
minimumIntegerDigits = Math.min(newValue, 309);
|
|
}
|
|
|
|
public void setMultiplier (int newValue)
|
|
{
|
|
multiplier = newValue;
|
|
}
|
|
|
|
public void setNegativePrefix (String newValue)
|
|
{
|
|
negativePrefix = newValue;
|
|
}
|
|
|
|
public void setNegativeSuffix (String newValue)
|
|
{
|
|
negativeSuffix = newValue;
|
|
}
|
|
|
|
public void setPositivePrefix (String newValue)
|
|
{
|
|
positivePrefix = newValue;
|
|
}
|
|
|
|
public void setPositiveSuffix (String newValue)
|
|
{
|
|
positiveSuffix = newValue;
|
|
}
|
|
|
|
private final void quoteFix (StringBuffer buf, String text, String patChars)
|
|
{
|
|
int len = text.length();
|
|
for (int index = 0; index < len; ++index)
|
|
{
|
|
char c = text.charAt(index);
|
|
if (patChars.indexOf(c) != -1)
|
|
{
|
|
buf.append('\'');
|
|
buf.append(c);
|
|
buf.append('\'');
|
|
}
|
|
else
|
|
buf.append(c);
|
|
}
|
|
}
|
|
|
|
private final String computePattern (DecimalFormatSymbols syms)
|
|
{
|
|
StringBuffer mainPattern = new StringBuffer ();
|
|
// We have to at least emit a zero for the minimum number of
|
|
// digits. Past that we need hash marks up to the grouping
|
|
// separator (and one beyond).
|
|
int total_digits = Math.max(minimumIntegerDigits,
|
|
groupingUsed ? groupingSize + 1: 0);
|
|
for (int i = 0; i < total_digits - minimumIntegerDigits; ++i)
|
|
mainPattern.append(syms.getDigit());
|
|
for (int i = total_digits - minimumIntegerDigits; i < total_digits; ++i)
|
|
mainPattern.append(syms.getZeroDigit());
|
|
// Inserting the gropuing operator afterwards is easier.
|
|
if (groupingUsed)
|
|
mainPattern.insert(mainPattern.length() - groupingSize,
|
|
syms.getGroupingSeparator());
|
|
// See if we need decimal info.
|
|
if (minimumFractionDigits > 0 || maximumFractionDigits > 0
|
|
|| decimalSeparatorAlwaysShown)
|
|
mainPattern.append(syms.getDecimalSeparator());
|
|
for (int i = 0; i < minimumFractionDigits; ++i)
|
|
mainPattern.append(syms.getZeroDigit());
|
|
for (int i = minimumFractionDigits; i < maximumFractionDigits; ++i)
|
|
mainPattern.append(syms.getDigit());
|
|
if (useExponentialNotation)
|
|
{
|
|
mainPattern.append(syms.getExponential());
|
|
for (int i = 0; i < minExponentDigits; ++i)
|
|
mainPattern.append(syms.getZeroDigit());
|
|
if (minExponentDigits == 0)
|
|
mainPattern.append(syms.getDigit());
|
|
}
|
|
|
|
String main = mainPattern.toString();
|
|
String patChars = patternChars (syms);
|
|
mainPattern.setLength(0);
|
|
|
|
quoteFix (mainPattern, positivePrefix, patChars);
|
|
mainPattern.append(main);
|
|
quoteFix (mainPattern, positiveSuffix, patChars);
|
|
|
|
if (negativePrefix != null)
|
|
{
|
|
quoteFix (mainPattern, negativePrefix, patChars);
|
|
mainPattern.append(main);
|
|
quoteFix (mainPattern, negativeSuffix, patChars);
|
|
}
|
|
|
|
return mainPattern.toString();
|
|
}
|
|
|
|
public String toLocalizedPattern ()
|
|
{
|
|
return computePattern (symbols);
|
|
}
|
|
|
|
public String toPattern ()
|
|
{
|
|
return computePattern (nonLocalizedSymbols);
|
|
}
|
|
|
|
// These names are fixed by the serialization spec.
|
|
private boolean decimalSeparatorAlwaysShown;
|
|
private byte groupingSize;
|
|
private byte minExponentDigits;
|
|
private int multiplier;
|
|
private String negativePrefix;
|
|
private String negativeSuffix;
|
|
private String positivePrefix;
|
|
private String positiveSuffix;
|
|
private int serialVersionOnStream = 1;
|
|
private DecimalFormatSymbols symbols;
|
|
private boolean useExponentialNotation;
|
|
private static final long serialVersionUID = 864413376551465018L;
|
|
|
|
private void readObject(ObjectInputStream stream)
|
|
throws IOException, ClassNotFoundException
|
|
{
|
|
stream.defaultReadObject();
|
|
if (serialVersionOnStream < 1)
|
|
{
|
|
useExponentialNotation = false;
|
|
serialVersionOnStream = 1;
|
|
}
|
|
}
|
|
|
|
// The locale-independent pattern symbols happen to be the same as
|
|
// the US symbols.
|
|
private static final DecimalFormatSymbols nonLocalizedSymbols
|
|
= new DecimalFormatSymbols (Locale.US);
|
|
}
|