<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 2000-2004
 *      Sleepycat Software.  All rights reserved.
 *
 * $Id: LongBinding.java,v 1.4 2004/08/02 18:52:04 mjc Exp $
 */

package com.sleepycat.bind.tuple;

import com.sleepycat.db.DatabaseEntry;

/**
 * A concrete &lt;code&gt;TupleBinding&lt;/code&gt; for a &lt;code&gt;Long&lt;/code&gt; primitive
 * wrapper or a &lt;code&gt;long&lt;/code&gt; primitive.
 *
 * &lt;p&gt;There are two ways to use this class:&lt;/p&gt;
 * &lt;ol&gt;
 * &lt;li&gt;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.&lt;/li&gt;
 * &lt;li&gt;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.&lt;/li&gt;
 * &lt;/ol&gt;
 */
public class LongBinding extends TupleBinding {

    private static final int LONG_SIZE = 8;

    // javadoc is inherited
    public Object entryToObject(TupleInput input) {

        return new Long(input.readLong());
    }

    // javadoc is inherited
    public void objectToEntry(Object object, TupleOutput output) {

        /* Do nothing.  Not called by objectToEntry(Object,DatabaseEntry). */
    }

    // javadoc is inherited
    public void objectToEntry(Object object, DatabaseEntry entry) {

        longToEntry(((Number) object).longValue(), entry);
    }

    /**
     * Converts an entry buffer into a simple &lt;code&gt;long&lt;/code&gt; value.
     *
     * @param entry is the source entry buffer.
     *
     * @return the resulting value.
     */
    public static long entryToLong(DatabaseEntry entry) {

        return entryToInput(entry).readLong();
    }

    /**
     * Converts a simple &lt;code&gt;long&lt;/code&gt; value into an entry buffer.
     *
     * @param val is the source value.
     *
     * @param entry is the destination entry buffer.
     */
    public static void longToEntry(long val, DatabaseEntry entry) {

        outputToEntry(newOutput(new byte[LONG_SIZE]).writeLong(val), entry);
    }
}
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