/*
* Copyright 2003-2007 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
/* This file has been extensively modified from the original Sun implementation
* to provide for compile time checking of Format Strings.
*
* These modifications were performed by Bill Pugh, this code is free software.
*
*/
package edu.umd.cs.findbugs.formatStringChecker;
import java.util.DuplicateFormatFlagsException;
import java.util.UnknownFormatFlagsException;
class Flags {
private int flags;
static final Flags NONE = new Flags(0); // ''
// duplicate declarations from Formattable.java
static final Flags LEFT_JUSTIFY = new Flags(1 << 0); // '-'
static final Flags UPPERCASE = new Flags(1 << 1); // '^'
static final Flags ALTERNATE = new Flags(1 << 2); // '#'
// numerics
static final Flags PLUS = new Flags(1 << 3); // '+'
static final Flags LEADING_SPACE = new Flags(1 << 4); // ' '
static final Flags ZERO_PAD = new Flags(1 << 5); // '0'
static final Flags GROUP = new Flags(1 << 6); // ','
static final Flags PARENTHESES = new Flags(1 << 7); // '('
// indexing
static final Flags PREVIOUS = new Flags(1 << 8); // '<'
private Flags(int f) {
flags = f;
}
public int valueOf() {
return flags;
}
public boolean contains(Flags f) {
return (flags & f.valueOf()) == f.valueOf();
}
public Flags dup() {
return new Flags(flags);
}
Flags add(Flags f) {
flags |= f.valueOf();
return this;
}
public Flags remove(Flags f) {
flags &= ~f.valueOf();
return this;
}
public static Flags parse(String s) {
char[] ca = s.toCharArray();
Flags f = new Flags(0);
for (int i = 0; i < ca.length; i++) {
Flags v = parse(ca[i]);
if (f.contains(v))
throw new DuplicateFormatFlagsException(v.toString());
f.add(v);
}
return f;
}
// parse those flags which may be provided by users
private static Flags parse(char c) {
switch (c) {
case '-':
return LEFT_JUSTIFY;
case '#':
return ALTERNATE;
case '+':
return PLUS;
case ' ':
return LEADING_SPACE;
case '0':
return ZERO_PAD;
case ',':
return GROUP;
case '(':
return PARENTHESES;
case '<':
return PREVIOUS;
default:
throw new UnknownFormatFlagsException(String.valueOf(c));
}
}
// Returns a string representation of the current <tt>Flags</tt>.
public static String toString(Flags f) {
return f.toString();
}
public String toString() {
StringBuilder sb = new StringBuilder();
if (contains(LEFT_JUSTIFY))
sb.append('-');
if (contains(UPPERCASE))
sb.append('^');
if (contains(ALTERNATE))
sb.append('#');
if (contains(PLUS))
sb.append('+');
if (contains(LEADING_SPACE))
sb.append(' ');
if (contains(ZERO_PAD))
sb.append('0');
if (contains(GROUP))
sb.append(',');
if (contains(PARENTHESES))
sb.append('(');
if (contains(PREVIOUS))
sb.append('<');
return sb.toString();
}
}