Mega Code Archive
Primitive utilities
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/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
/**
* Primitive utilities.
*
* @version <tt>$Revision: 1958 $</tt>
* @author <a href="mailto:jason@planet57.com">Jason Dillon</a>
*/
public final class Primitives {
/**
* Get a Boolean from a boolean, equivalent to the java 1.4 method
* Boolean.valueOf(boolean)
*
* @param value
* the boolean
* @return the Boolean equivalent
*/
public static Boolean valueOf(boolean value) {
if (value)
return Boolean.TRUE;
else
return Boolean.FALSE;
}
/**
* Test the equality of two doubles by converting their values into IEEE 754
* floating-point "double format" long values.
*
* @param a
* Double to check equality with.
* @param b
* Double to check equality with.
* @return True if a equals b.
*/
public static boolean equals(final double a, final double b) {
return Double.doubleToLongBits(a) == Double.doubleToLongBits(b);
}
/**
* Test the equality of two doubles by converting their values into IEEE 754
* floating-point "single precision" bit layouts.
*
* @param a
* Float to check equality with.
* @param b
* Float to check equality with.
* @return True if a equals b.
*/
public static boolean equals(final float a, final float b) {
return Float.floatToIntBits(a) == Float.floatToIntBits(b);
}
/**
* Test the equality of a given sub-section of two byte arrays.
*
* @param a
* The first byte array.
* @param abegin
* The begining index of the first byte array.
* @param b
* The second byte array.
* @param bbegin
* The begining index of the second byte array.
* @param length
* The length of the sub-section.
* @return True if sub-sections are equal.
*/
public static boolean equals(final byte a[], final int abegin, final byte b[], final int bbegin,
final int length) {
try {
int i = length;
while (--i >= 0) {
if (a[abegin + i] != b[bbegin + i]) {
return false;
}
}
} catch (ArrayIndexOutOfBoundsException e) {
return false;
}
return true;
}
/**
* Test the equality of two byte arrays.
*
* @param a
* The first byte array.
* @param b
* The second byte array.
* @return True if the byte arrays are equal.
*/
public static boolean equals(final byte a[], final byte b[]) {
if (a == b)
return true;
if (a == null || b == null)
return false;
if (a.length != b.length)
return false;
try {
for (int i = 0; i < a.length; i++) {
if (a[i] != b[i]) {
return false;
}
}
} catch (ArrayIndexOutOfBoundsException e) {
return false;
}
return true;
}
}
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