The version of Apache log4j used by SoundHelix.
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MessageFormatter.java
/*
* Copyright (c) 2004-2005 SLF4J.ORG
* Copyright (c) 2004-2005 QOS.ch
*
* All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, and/or sell copies of the Software, and to permit persons
* to whom the Software is furnished to do so, provided that the above
* copyright notice(s) and this permission notice appear in all copies of
* the Software and that both the above copyright notice(s) and this
* permission notice appear in supporting documentation.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
* OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY
* SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Except as contained in this notice, the name of a copyright holder
* shall not be used in advertising or otherwise to promote the sale, use
* or other dealings in this Software without prior written authorization
* of the copyright holder.
*
*/
package org.slf4j.impl;
/**
* Formats messages according to very simple rules.
* See {@link #format(String, Object)} and
* {@link #format(String, Object, Object)} for more details.
*
* @author Ceki Gülcü
*/
public class MessageFormatter {
static final char DELIM_START = '{';
static final char DELIM_STOP = '}';
/**
* Performs single argument substitution for the 'messagePattern' passed as
* parameter.
* <p>
* For example, <code>MessageFormatter.format("Hi {}.", "there");</code> will
* return the string "Hi there.".
* <p>
* The {} pair is called the formatting element. It serves to designate the
* location where the argument needs to be inserted within the pattern.
*
* @param messagePattern The message pattern which will be parsed and formatted
* @param argument The argument to be inserted instead of the formatting element
* @return The formatted message
*/
public static String format(String messagePattern, Object argument) {
int j = messagePattern.indexOf(DELIM_START);
int len = messagePattern.length();
char escape = 'x';
// if there are no { characters or { is the last character of the messsage
// then we just return messagePattern
if (j == -1 || (j+1 == len)) {
return messagePattern;
} else {
if(j+1 == len) {
}
char delimStop = messagePattern.charAt(j + 1);
if (j > 0) {
escape = messagePattern.charAt(j - 1);
}
if ((delimStop != DELIM_STOP) || (escape == '\\')) {
// invalid DELIM_START/DELIM_STOP pair or espace character is
// present
return messagePattern;
} else {
StringBuffer sbuf = new StringBuffer(len + 20);
sbuf.append(messagePattern.substring(0, j));
sbuf.append(argument);
sbuf.append(messagePattern.substring(j + 2));
return sbuf.toString();
}
}
}
/**
* /**
* Performs a two argument substitution for the 'messagePattern' passed as
* parameter.
* <p>
* For example, <code>MessageFormatter.format("Hi {}. My name is {}.",
* "there", "David");</code> will return the string "Hi there. My name is David.".
* <p>
* The '{}' pair is called a formatting element. It serves to designate the
* location where the arguments need to be inserted within the message pattern.
*
* @param messagePattern The message pattern which will be parsed and formatted
* @param arg1 The first argument to replace the first formatting element
* @param arg2 The second argument to replace the second formatting element
* @return The formatted message
*/
public static String format(String messagePattern, Object arg1, Object arg2) {
int i = 0;
int len = messagePattern.length();
int j = messagePattern.indexOf(DELIM_START);
StringBuffer sbuf = new StringBuffer(messagePattern.length() + 50);
for (int L = 0; L < 2; L++) {
j = messagePattern.indexOf(DELIM_START, i);
if (j == -1 || (j+1 == len)) {
// no more variables
if (i == 0) { // this is a simple string
return messagePattern;
} else { // add the tail string which contains no variables and return the result.
sbuf.append(messagePattern.substring(i, messagePattern.length()));
return sbuf.toString();
}
} else {
char delimStop = messagePattern.charAt(j + 1);
if ((delimStop != DELIM_STOP)) {
// invalid DELIM_START/DELIM_STOP pair
sbuf.append(messagePattern.substring(i, messagePattern.length()));
return sbuf.toString();
}
sbuf.append(messagePattern.substring(i, j));
sbuf.append((L == 0) ? arg1 : arg2);
i = j + 2;
}
}
// append the characters following the second {} pair.
sbuf.append(messagePattern.substring(i, messagePattern.length()));
return sbuf.toString();
}
}