Conversion.java example

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/*
 * 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;

class Conversion {
	// Byte, Short, Integer, Long, BigInteger
	// (and associated primitives due to autoboxing)
	static final char DECIMAL_INTEGER = 'd';
	static final char OCTAL_INTEGER = 'o';
	static final char HEXADECIMAL_INTEGER = 'x';
	static final char HEXADECIMAL_INTEGER_UPPER = 'X';

	// Float, Double, BigDecimal
	// (and associated primitives due to autoboxing)
	static final char SCIENTIFIC = 'e';
	static final char SCIENTIFIC_UPPER = 'E';
	static final char GENERAL = 'g';
	static final char GENERAL_UPPER = 'G';
	static final char DECIMAL_FLOAT = 'f';
	static final char HEXADECIMAL_FLOAT = 'a';
	static final char HEXADECIMAL_FLOAT_UPPER = 'A';

	// Character, Byte, Short, Integer
	// (and associated primitives due to autoboxing)
	static final char CHARACTER = 'c';
	static final char CHARACTER_UPPER = 'C';

	// java.util.Date, java.util.Calendar, long
	static final char DATE_TIME = 't';
	static final char DATE_TIME_UPPER = 'T';

	// if (arg.TYPE != boolean) return boolean
	// if (arg != null) return true; else return false;
	static final char BOOLEAN = 'b';
	static final char BOOLEAN_UPPER = 'B';
	// if (arg instanceof Formattable) arg.formatTo()
	// else arg.toString();
	static final char STRING = 's';
	static final char STRING_UPPER = 'S';
	// arg.hashCode()
	static final char HASHCODE = 'h';
	static final char HASHCODE_UPPER = 'H';

	static final char LINE_SEPARATOR = 'n';
	static final char PERCENT_SIGN = '%';

	static boolean isValid(char c) {
		return (isGeneral(c) || isInteger(c) || isFloat(c) || isText(c)
				|| c == 't' || isCharacter(c));
	}

	// Returns true iff the Conversion is applicable to all objects.
	static boolean isGeneral(char c) {
		switch (c) {
		case BOOLEAN:
		case BOOLEAN_UPPER:
		case STRING:
		case STRING_UPPER:
		case HASHCODE:
		case HASHCODE_UPPER:
			return true;
		default:
			return false;
		}
	}

	// Returns true iff the Conversion is applicable to character.
	static boolean isCharacter(char c) {
		switch (c) {
		case CHARACTER:
		case CHARACTER_UPPER:
			return true;
		default:
			return false;
		}
	}

	// Returns true iff the Conversion is an integer type.
	static boolean isInteger(char c) {
		switch (c) {
		case DECIMAL_INTEGER:
		case OCTAL_INTEGER:
		case HEXADECIMAL_INTEGER:
		case HEXADECIMAL_INTEGER_UPPER:
			return true;
		default:
			return false;
		}
	}

	// Returns true iff the Conversion is a floating-point type.
	static boolean isFloat(char c) {
		switch (c) {
		case SCIENTIFIC:
		case SCIENTIFIC_UPPER:
		case GENERAL:
		case GENERAL_UPPER:
		case DECIMAL_FLOAT:
		case HEXADECIMAL_FLOAT:
		case HEXADECIMAL_FLOAT_UPPER:
			return true;
		default:
			return false;
		}
	}

	// Returns true iff the Conversion does not require an argument
	static boolean isText(char c) {
		switch (c) {
		case LINE_SEPARATOR:
		case PERCENT_SIGN:
			return true;
		default:
			return false;
		}
	}
}