+++ /dev/null
-/* MessageFormat.java - Localized message formatting.
- Copyright (C) 1999, 2001 Free Software Foundation, Inc.
-
-This file is part of GNU Classpath.
-
-GNU Classpath is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-GNU Classpath 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 for more details.
-
-You should have received a copy of the GNU General Public License
-along with GNU Classpath; see the file COPYING. If not, write to the
-Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-02111-1307 USA.
-
-Linking this library statically or dynamically with other modules is
-making a combined work based on this library. Thus, the terms and
-conditions of the GNU General Public License cover the whole
-combination.
-
-As a special exception, the copyright holders of this library give you
-permission to link this library with independent modules to produce an
-executable, regardless of the license terms of these independent
-modules, and to copy and distribute the resulting executable under
-terms of your choice, provided that you also meet, for each linked
-independent module, the terms and conditions of the license of that
-module. An independent module is a module which is not derived from
-or based on this library. If you modify this library, you may extend
-this exception to your version of the library, but you are not
-obligated to do so. If you do not wish to do so, delete this
-exception statement from your version. */
-
-
-package java.text;
-
-import java.util.Date;
-import java.util.Locale;
-import java.util.Vector;
-
-/**
- * @author Tom Tromey <tromey@cygnus.com>
- * @author Jorge Aliss <jaliss@hotmail.com>
- * @date March 3, 1999
- */
-/* Written using "Java Class Libraries", 2nd edition, plus online
- * API docs for JDK 1.2 from http://www.javasoft.com.
- * Status: Believed complete and correct to 1.2, except serialization.
- * and parsing.
- */
-final class MessageFormatElement
-{
- // Argument number.
- int argNumber;
- // Formatter to be used. This is the format set by setFormat.
- Format setFormat;
- // Formatter to be used based on the type.
- Format format;
-
- // Argument will be checked to make sure it is an instance of this
- // class.
- Class formatClass;
-
- // Formatter type.
- String type;
- // Formatter style.
- String style;
-
- // Text to follow this element.
- String trailer;
-
- // Recompute the locale-based formatter.
- void setLocale (Locale loc)
- {
- if (type == null)
- ;
- else if (type.equals("number"))
- {
- formatClass = java.lang.Number.class;
-
- if (style == null)
- format = NumberFormat.getInstance(loc);
- else if (style.equals("currency"))
- format = NumberFormat.getCurrencyInstance(loc);
- else if (style.equals("percent"))
- format = NumberFormat.getPercentInstance(loc);
- else if (style.equals("integer"))
- {
- NumberFormat nf = NumberFormat.getNumberInstance(loc);
- nf.setMaximumFractionDigits(0);
- nf.setGroupingUsed(false);
- format = nf;
- }
- else
- {
- format = NumberFormat.getNumberInstance(loc);
- DecimalFormat df = (DecimalFormat) format;
- df.applyPattern(style);
- }
- }
- else if (type.equals("time") || type.equals("date"))
- {
- formatClass = java.util.Date.class;
-
- int val = DateFormat.DEFAULT;
- if (style == null)
- ;
- else if (style.equals("short"))
- val = DateFormat.SHORT;
- else if (style.equals("medium"))
- val = DateFormat.MEDIUM;
- else if (style.equals("long"))
- val = DateFormat.LONG;
- else if (style.equals("full"))
- val = DateFormat.FULL;
-
- if (type.equals("time"))
- format = DateFormat.getTimeInstance(val, loc);
- else
- format = DateFormat.getDateInstance(val, loc);
-
- if (style != null && val == DateFormat.DEFAULT)
- {
- SimpleDateFormat sdf = (SimpleDateFormat) format;
- sdf.applyPattern(style);
- }
- }
- else if (type.equals("choice"))
- {
- formatClass = java.lang.Number.class;
-
- if (style == null)
- throw new
- IllegalArgumentException ("style required for choice format");
- format = new ChoiceFormat (style);
- }
- }
-}
-
-public class MessageFormat extends Format
-{
- // Helper that returns the text up to the next format opener. The
- // text is put into BUFFER. Returns index of character after end of
- // string. Throws IllegalArgumentException on error.
- private static final int scanString (String pat, int index,
- StringBuffer buffer)
- {
- int max = pat.length();
- buffer.setLength(0);
- for (; index < max; ++index)
- {
- char c = pat.charAt(index);
- if (c == '\'' && index + 2 < max && pat.charAt(index + 2) == '\'')
- {
- buffer.append(pat.charAt(index + 1));
- index += 2;
- }
- else if (c == '\'' && index + 1 < max
- && pat.charAt(index + 1) == '\'')
- {
- buffer.append(c);
- ++index;
- }
- else if (c == '{')
- break;
- else if (c == '}')
- throw new IllegalArgumentException ();
- else
- buffer.append(c);
- }
- return index;
- }
-
- // This helper retrieves a single part of a format element. Returns
- // the index of the terminating character.
- private static final int scanFormatElement (String pat, int index,
- StringBuffer buffer,
- char term)
- {
- int max = pat.length();
- buffer.setLength(0);
- int brace_depth = 1;
-
- for (; index < max; ++index)
- {
- char c = pat.charAt(index);
- if (c == '\'' && index + 2 < max && pat.charAt(index + 2) == '\'')
- {
- buffer.append(c);
- buffer.append(pat.charAt(index + 1));
- buffer.append(c);
- index += 2;
- }
- else if (c == '\'' && index + 1 < max
- && pat.charAt(index + 1) == '\'')
- {
- buffer.append(c);
- ++index;
- }
- else if (c == '{')
- {
- buffer.append(c);
- ++brace_depth;
- }
- else if (c == '}')
- {
- if (--brace_depth == 0)
- break;
- buffer.append(c);
- }
- // Check for TERM after braces, because TERM might be `}'.
- else if (c == term)
- break;
- else
- buffer.append(c);
- }
- return index;
- }
-
- // This is used to parse a format element and whatever non-format
- // text might trail it.
- private static final int scanFormat (String pat, int index,
- StringBuffer buffer, Vector elts,
- Locale locale)
- {
- MessageFormatElement mfe = new MessageFormatElement ();
- elts.addElement(mfe);
-
- int max = pat.length();
-
- // Skip the opening `{'.
- ++index;
-
- // Fetch the argument number.
- index = scanFormatElement (pat, index, buffer, ',');
- try
- {
- mfe.argNumber = Integer.parseInt(buffer.toString());
- }
- catch (NumberFormatException nfx)
- {
- throw new IllegalArgumentException ();
- }
-
- // Extract the element format.
- if (index < max && pat.charAt(index) == ',')
- {
- index = scanFormatElement (pat, index + 1, buffer, ',');
- mfe.type = buffer.toString();
-
- // Extract the style.
- if (index < max && pat.charAt(index) == ',')
- {
- index = scanFormatElement (pat, index + 1, buffer, '}');
- mfe.style = buffer.toString ();
- }
- }
-
- // Advance past the last terminator.
- if (index >= max || pat.charAt(index) != '}')
- throw new IllegalArgumentException ();
- ++index;
-
- // Now fetch trailing string.
- index = scanString (pat, index, buffer);
- mfe.trailer = buffer.toString ();
-
- mfe.setLocale(locale);
-
- return index;
- }
-
- /**
- * Applies the specified pattern to this MessageFormat.
- *
- * @param aPattern The Pattern
- */
- public void applyPattern (String newPattern)
- {
- pattern = newPattern;
-
- StringBuffer tempBuffer = new StringBuffer ();
-
- int index = scanString (newPattern, 0, tempBuffer);
- leader = tempBuffer.toString();
-
- Vector elts = new Vector ();
- while (index < newPattern.length())
- index = scanFormat (newPattern, index, tempBuffer, elts, locale);
-
- elements = new MessageFormatElement[elts.size()];
- elts.copyInto(elements);
- }
-
- /**
- * Overrides Format.clone()
- */
- public Object clone ()
- {
- MessageFormat c = (MessageFormat) super.clone ();
- c.elements = (MessageFormatElement[]) elements.clone ();
- return c;
- }
-
- /**
- * Overrides Format.equals(Object obj)
- */
- public boolean equals (Object obj)
- {
- if (! (obj instanceof MessageFormat))
- return false;
- MessageFormat mf = (MessageFormat) obj;
- return (pattern.equals(mf.pattern)
- && locale.equals(mf.locale));
- }
-
- /**
- * A convinience method to format patterns.
- *
- * @param aPattern The pattern used when formatting.
- * @param arguments The array containing the objects to be formatted.
- */
- public static String format (String pattern, Object arguments[])
- {
- MessageFormat mf = new MessageFormat (pattern);
- StringBuffer sb = new StringBuffer ();
- FieldPosition fp = new FieldPosition (NumberFormat.INTEGER_FIELD);
- return mf.format(arguments, sb, fp).toString();
- }
-
- /**
- * Returns the pattern with the formatted objects.
- *
- * @param source The array containing the objects to be formatted.
- * @param result The StringBuffer where the text is appened.
- * @param fp A FieldPosition object (it is ignored).
- */
- public final StringBuffer format (Object arguments[], StringBuffer appendBuf,
- FieldPosition ignore)
- {
- appendBuf.append(leader);
-
- for (int i = 0; i < elements.length; ++i)
- {
- if (elements[i].argNumber >= arguments.length)
- throw new IllegalArgumentException ();
- Object thisArg = arguments[elements[i].argNumber];
-
- Format formatter = null;
- if (elements[i].setFormat != null)
- formatter = elements[i].setFormat;
- else if (elements[i].format != null)
- {
- if (elements[i].formatClass != null
- && ! elements[i].formatClass.isInstance(thisArg))
- throw new IllegalArgumentException ();
- formatter = elements[i].format;
- }
- else if (thisArg instanceof Number)
- formatter = NumberFormat.getInstance(locale);
- else if (thisArg instanceof Date)
- formatter = DateFormat.getTimeInstance(DateFormat.DEFAULT, locale);
- else
- appendBuf.append(thisArg);
-
- if (formatter != null)
- {
- // Special-case ChoiceFormat.
- if (formatter instanceof ChoiceFormat)
- {
- StringBuffer buf = new StringBuffer ();
- // FIXME: don't actually know what is correct here.
- // Can a sub-format refer to any argument, or just
- // the single argument passed to it? Must test
- // against JDK.
- formatter.format(thisArg, buf, ignore);
- MessageFormat mf = new MessageFormat ();
- mf.setLocale(locale);
- mf.applyPattern(buf.toString());
- formatter = mf;
- }
- formatter.format(thisArg, appendBuf, ignore);
- }
-
- appendBuf.append(elements[i].trailer);
- }
-
- return appendBuf;
- }
-
- /**
- * Returns the pattern with the formatted objects.
- *
- * @param source The object to be formatted.
- * @param result The StringBuffer where the text is appened.
- * @param fp A FieldPosition object (it is ignored).
- */
- public final StringBuffer format (Object singleArg, StringBuffer appendBuf,
- FieldPosition ignore)
- {
- Object[] args;
-
- if (singleArg instanceof Object[])
- {
- // This isn't specified in any manual, but it follows the
- // JDK implementation.
- args = (Object[]) singleArg;
- }
- else
- {
- args = new Object[1];
- args[0] = singleArg;
- }
- return format (args, appendBuf, ignore);
- }
-
- /**
- * Returns an array with the Formats for
- * the arguments.
- */
- public Format[] getFormats ()
- {
- Format[] f = new Format[elements.length];
- for (int i = elements.length - 1; i >= 0; --i)
- f[i] = elements[i].setFormat;
- return f;
- }
-
- /**
- * Returns the locale.
- */
- public Locale getLocale ()
- {
- return locale;
- }
-
- /**
- * Overrides Format.hashCode()
- */
- public int hashCode ()
- {
- // FIXME: not a very good hash.
- return pattern.hashCode() + locale.hashCode();
- }
-
- private MessageFormat ()
- {
- }
-
- /**
- * Creates a new MessageFormat object with
- * the specified pattern
- *
- * @param aPattern The Pattern
- */
- public MessageFormat (String pattern)
- {
- locale = Locale.getDefault();
- applyPattern (pattern);
- }
-
- public Object[] parse (String sourceStr, ParsePosition pos)
- {
- // Check initial text.
- int index = pos.getIndex();
- if (! sourceStr.startsWith(leader, index))
- {
- pos.setErrorIndex(index);
- return null;
- }
- index += leader.length();
-
- Vector results = new Vector (elements.length, 1);
- // Now check each format.
- for (int i = 0; i < elements.length; ++i)
- {
- Format formatter = null;
- if (elements[i].setFormat != null)
- formatter = elements[i].setFormat;
- else if (elements[i].format != null)
- formatter = elements[i].format;
-
- Object value = null;
- if (formatter instanceof ChoiceFormat)
- {
- // We must special-case a ChoiceFormat because it might
- // have recursive formatting.
- ChoiceFormat cf = (ChoiceFormat) formatter;
- String[] formats = (String[]) cf.getFormats();
- double[] limits = (double[]) cf.getLimits();
- MessageFormat subfmt = new MessageFormat ();
- subfmt.setLocale(locale);
- ParsePosition subpos = new ParsePosition (index);
-
- int j;
- for (j = 0; value == null && j < limits.length; ++j)
- {
- subfmt.applyPattern(formats[j]);
- subpos.setIndex(index);
- value = subfmt.parse(sourceStr, subpos);
- }
- if (value != null)
- {
- index = subpos.getIndex();
- value = new Double (limits[j]);
- }
- }
- else if (formatter != null)
- {
- pos.setIndex(index);
- value = formatter.parseObject(sourceStr, pos);
- if (value != null)
- index = pos.getIndex();
- }
- else
- {
- // We have a String format. This can lose in a number
- // of ways, but we give it a shot.
- int next_index = sourceStr.indexOf(elements[i].trailer, index);
- if (next_index == -1)
- {
- pos.setErrorIndex(index);
- return null;
- }
- value = sourceStr.substring(index, next_index);
- index = next_index;
- }
-
- if (value == null
- || ! sourceStr.startsWith(elements[i].trailer, index))
- {
- pos.setErrorIndex(index);
- return null;
- }
-
- if (elements[i].argNumber >= results.size())
- results.setSize(elements[i].argNumber + 1);
- results.setElementAt(value, elements[i].argNumber);
-
- index += elements[i].trailer.length();
- }
-
- Object[] r = new Object[results.size()];
- results.copyInto(r);
- return r;
- }
-
- public Object[] parse (String sourceStr) throws ParseException
- {
- ParsePosition pp = new ParsePosition (0);
- Object[] r = parse (sourceStr, pp);
- if (r == null)
- throw new ParseException ("couldn't parse string", pp.getErrorIndex());
- return r;
- }
-
- public Object parseObject (String sourceStr, ParsePosition pos)
- {
- return parse (sourceStr, pos);
- }
-
- /**
- * Sets the format for the argument at an specified
- * index.
- *
- * @param index The index.
- * @format The Format object.
- */
- public void setFormat (int variableNum, Format newFormat)
- {
- elements[variableNum].setFormat = newFormat;
- }
-
- /**
- * Sets the formats for the arguments.
- *
- * @param formats An array of Format objects.
- */
- public void setFormats (Format[] newFormats)
- {
- if (newFormats.length < elements.length)
- throw new IllegalArgumentException ();
- int len = Math.min(newFormats.length, elements.length);
- for (int i = 0; i < len; ++i)
- elements[i].setFormat = newFormats[i];
- }
-
- /**
- * Sets the locale.
- *
- * @param locale A Locale
- */
- public void setLocale (Locale loc)
- {
- locale = loc;
- if (elements != null)
- {
- for (int i = 0; i < elements.length; ++i)
- elements[i].setLocale(loc);
- }
- }
-
- /**
- * Returns the pattern.
- */
- public String toPattern ()
- {
- return pattern;
- }
-
- // The pattern string.
- private String pattern;
- // The locale.
- private Locale locale;
- // Variables.
- private MessageFormatElement[] elements;
- // Leader text.
- private String leader;
-}
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