/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2000,2007 Oracle. All rights reserved.
*
* $Id: DoubleBinding.java,v 12.7 2007/05/04 00:28:25 mark Exp $
*/
package com.sleepycat.bind.tuple;
import com.sleepycat.db.DatabaseEntry;
/**
* A concrete TupleBinding
for a Double
primitive
* wrapper or a double
primitive.
*
*
Note: This class produces byte array values that by default * (without a custom comparator) do not sort correctly for negative * values. Only non-negative values are sorted correctly by default. To sort * all values correctly by default, use {@link SortedDoubleBinding}.
* *There are two ways to use this class:
*double
value.
*
* @param entry is the source entry buffer.
*
* @return the resulting value.
*/
public static double entryToDouble(DatabaseEntry entry) {
return entryToInput(entry).readDouble();
}
/**
* Converts a simple double
value into an entry buffer.
*
* @param val is the source value.
*
* @param entry is the destination entry buffer.
*/
public static void doubleToEntry(double val, DatabaseEntry entry) {
outputToEntry(sizedOutput().writeDouble(val), entry);
}
/**
* Returns a tuple output object of the exact size needed, to avoid
* wasting space when a single primitive is output.
*/
static TupleOutput sizedOutput() {
return new TupleOutput(new byte[DOUBLE_SIZE]);
}
}