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/*
========== licence begin GPL
Copyright (C) 2002-2003 SAP AG
This program 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
of the License, or (at your option) any later version.
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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
========== licence end
*/
package com.sap.dbtech.util.printf;
import com.sap.dbtech.util.MessageKey;
import com.sap.dbtech.util.MessageTranslator;
/**
*
*/
public class PrintfFormat {
private Formatter [] formats;
private int elements;
/**
*
* @param formatString java.lang.String
* @exception com.sap.dbtech.util.printf.FormatException The exception description.
*/
public PrintfFormat(String formatString)
throws FormatException
{
this.formats = this.parseFormatString (formatString);
}
/**
*
* @return com.sap.dbtech.util.printf.Formatter
* @param format java.lang.String
* @param kind char
* @exception lava.clib.stdio.PrintfFormatException The exception description.
*/
private Formatter createFormatter (String format, char kind) throws FormatException {
Formatter result;
switch (kind) {
case 's':
result = new StringFormatter (format);
break;
case 'd':
case 'i':
case 'o':
case 'x':
result = new IntegerFormatter (format);
break;
default:
throw new FormatException(MessageTranslator.translate(MessageKey.ERROR_FORMAT_UNKNOWN,
String.valueOf(kind)));
}
return result;
}
/**
*
* @return java.lang.String
* @param objects java.lang.Object[]
*/
public String format (Object [] objects)
throws PrintfArgumentMismatch
{
OArrayEnumeration enume = new OArrayEnumeration (objects);
StringBuffer buf = new StringBuffer ();
for (int i = 0; i < this.elements; ++i) {
buf.append (this.formats [i].format (enume));
}
if (enume.hasMoreElements ()) {
throw new PrintfArgumentMismatch (MessageTranslator.translate(MessageKey.ERROR_FORMAT_TOOMANYARGS));
}
return buf.toString ();
}
/**
*
* @return com.sap.dbtech.util.printf.Formatter[]
* @param formatString java.lang.String
* @exception lava.clib.stdio.PrintfFormatException The exception description.
*/
private Formatter [] parseFormatString (String formatString) throws FormatException {
Formatter [] result;
int arrayPos;
int arrayLength = 8;
int stringPos = 0;
int lastPos = 0;
int endPos = formatString.length ();
char current;
int formatStart;
result = new Formatter [arrayLength];
arrayPos = 0;
while (stringPos < endPos) {
stringPos = formatString.indexOf ('%', lastPos);
if (stringPos == -1) {
break;
}
if (formatString.charAt (stringPos + 1) == '%') {
// escaped %
result [arrayPos] = new LiteralFormatter ("%");
++arrayPos;
++stringPos;
}
else {
// real format string
/*
* reserve three slots
*/
if (arrayPos + 3 > arrayLength) {
Formatter [] tmp = new Formatter [arrayLength * 2];
System.arraycopy (result, 0, tmp, 0, arrayLength);
arrayLength *= 2;
result = tmp;
}
/*
* copy literal
*/
result [arrayPos] = new LiteralFormatter (formatString.substring (lastPos, stringPos));
++arrayPos;
lastPos = stringPos;
/*
* find end of format
*/
formatStart = stringPos;
do {
++stringPos;
current = formatString.charAt (stringPos);
} while (!(('a' <= current) && (current <= 'z'))
|| (('A' <= current) && (current <= 'Z')));
result [arrayPos] = this.createFormatter (
formatString.substring (lastPos, stringPos + 1), current);
++arrayPos;
lastPos = stringPos + 1;
}
}
result [arrayPos] = new LiteralFormatter (formatString.substring (lastPos));
this.elements = arrayPos + 1;
return result;
}
}
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