/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2000-2009 Oracle. All rights reserved.
*
* $Id$
*/
package com.sleepycat.bind.tuple;
import java.math.BigInteger;
import com.sleepycat.db.DatabaseEntry;
/**
* A concrete TupleBinding
for a BigInteger
value.
*/
public class BigIntegerBinding extends TupleBinding {
// javadoc is inherited
public BigInteger entryToObject(TupleInput input) {
return input.readBigInteger();
}
// javadoc is inherited
public void objectToEntry(BigInteger object, TupleOutput output) {
output.writeBigInteger(object);
}
// javadoc is inherited
protected TupleOutput getTupleOutput(BigInteger object) {
return sizedOutput(object);
}
/**
* Converts an entry buffer into a BigInteger
value.
*
* @param entry is the source entry buffer.
*
* @return the resulting value.
*/
public static BigInteger entryToBigInteger(DatabaseEntry entry) {
return entryToInput(entry).readBigInteger();
}
/**
* Converts a BigInteger
value into an entry buffer.
*
* @param val is the source value.
*
* @param entry is the destination entry buffer.
*/
public static void bigIntegerToEntry(BigInteger val, DatabaseEntry entry) {
outputToEntry(sizedOutput(val).writeBigInteger(val), entry);
}
/**
* Returns a tuple output object of the exact size needed, to avoid
* wasting space when a single primitive is output.
*/
private static TupleOutput sizedOutput(BigInteger val) {
int len = TupleOutput.getBigIntegerByteLength(val);
return new TupleOutput(new byte[len]);
}
}