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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2000, 2015 Oracle and/or its affiliates. All rights reserved.
*
*/
package com.sleepycat.bind.tuple;
import com.sleepycat.db.DatabaseEntry;
/**
* A concrete <code>TupleBinding</code> for a <code>Boolean</code> primitive
* wrapper or a <code>boolean</code> primitive.
*
* <p>There are two ways to use this class:</p>
* <ol>
* <li>When using the {@link com.sleepycat.db} package directly, the static
* methods in this class can be used to convert between primitive values and
* {@link DatabaseEntry} objects.</li>
* <li>When using the {@link com.sleepycat.collections} package, an instance of
* this class can be used with any stored collection. The easiest way to
* obtain a binding instance is with the {@link
* TupleBinding#getPrimitiveBinding} method.</li>
* </ol>
*
* @see <a href="package-summary.html#integerFormats">Integer Formats</a>
*/
public class BooleanBinding extends TupleBinding<Boolean> {
private static final int BOOLEAN_SIZE = 1;
// javadoc is inherited
public Boolean entryToObject(TupleInput input) {
return input.readBoolean();
}
// javadoc is inherited
public void objectToEntry(Boolean object, TupleOutput output) {
output.writeBoolean(object);
}
// javadoc is inherited
protected TupleOutput getTupleOutput(Boolean object) {
return sizedOutput();
}
/**
* Converts an entry buffer into a simple <code>boolean</code> value.
*
* @param entry is the source entry buffer.
*
* @return the resulting value.
*/
public static boolean entryToBoolean(DatabaseEntry entry) {
return entryToInput(entry).readBoolean();
}
/**
* Converts a simple <code>boolean</code> value into an entry buffer.
*
* @param val is the source value.
*
* @param entry is the destination entry buffer.
*/
public static void booleanToEntry(boolean val, DatabaseEntry entry) {
outputToEntry(sizedOutput().writeBoolean(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() {
return new TupleOutput(new byte[BOOLEAN_SIZE]);
}
}
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