mirror of
https://github.com/berkeleydb/libdb.git
synced 2024-11-17 09:36:24 +00:00
150 lines
5.7 KiB
HTML
150 lines
5.7 KiB
HTML
|
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
|
|||
|
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
|||
|
|
<html xmlns="http://www.w3.org/1999/xhtml">
|
|||
|
|
<head>
|
|||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
|
|||
|
|
<title>Using Sorted Collections</title>
|
|||
|
|
<link rel="stylesheet" href="gettingStarted.css" type="text/css" />
|
|||
|
|
<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
|
|||
|
|
<link rel="start" href="index.html" title="Berkeley DB Collections Tutorial" />
|
|||
|
|
<link rel="up" href="Tuple.html" title="Chapter 5. Using Tuples" />
|
|||
|
|
<link rel="prev" href="tuple-serialentitybindings.html" title="Creating Tuple-Serial Entity Bindings" />
|
|||
|
|
<link rel="next" href="SerializableEntity.html" title="Chapter 6. Using Serializable Entities" />
|
|||
|
|
</head>
|
|||
|
|
<body>
|
|||
|
|
<div xmlns="" class="navheader">
|
|||
|
|
<div class="libver">
|
|||
|
|
<p>Library Version 11.2.5.2</p>
|
|||
|
|
</div>
|
|||
|
|
<table width="100%" summary="Navigation header">
|
|||
|
|
<tr>
|
|||
|
|
<th colspan="3" align="center">
|
|||
|
|
Using Sorted Collections
|
|||
|
|
</th>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td width="20%" align="left"><a accesskey="p" href="tuple-serialentitybindings.html">Prev</a> </td>
|
|||
|
|
<th width="60%" align="center">Chapter 5.
|
|||
|
|
Using Tuples
|
|||
|
|
</th>
|
|||
|
|
<td width="20%" align="right"> <a accesskey="n" href="SerializableEntity.html">Next</a></td>
|
|||
|
|
</tr>
|
|||
|
|
</table>
|
|||
|
|
<hr />
|
|||
|
|
</div>
|
|||
|
|
<div class="sect1" lang="en" xml:lang="en">
|
|||
|
|
<div class="titlepage">
|
|||
|
|
<div>
|
|||
|
|
<div>
|
|||
|
|
<h2 class="title" style="clear: both"><a id="sortedcollections"></a>
|
|||
|
|
Using Sorted Collections
|
|||
|
|
</h2>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<p>
|
|||
|
|
In general, no changes to the prior example are necessary to use
|
|||
|
|
collections having tuple keys. Iteration of elements in a stored
|
|||
|
|
collection will be ordered by the sort order of the tuples.
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
In addition to using the tuple format, the
|
|||
|
|
<a class="ulink" href="../../java/com/sleepycat/db/DatabaseType.html#BTREE" target="_top">DatabaseType.BTREE</a>
|
|||
|
|
|
|||
|
|
access method must be used when creating the database.
|
|||
|
|
<a class="ulink" href="../../java/com/sleepycat/db/DatabaseType.html#BTREE" target="_top">DatabaseType.BTREE</a>
|
|||
|
|
|
|||
|
|
is used for the databases in all examples. The
|
|||
|
|
<a class="ulink" href="../../java/com/sleepycat/db/DatabaseType.html#HASH" target="_top">DatabaseType.HASH</a>
|
|||
|
|
|
|||
|
|
access method does not support sorted keys.
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
Although not shown in the example, all methods of the
|
|||
|
|
<a class="ulink" href="http://download.oracle.com/javase/1.5.0/docs/api/java/util/SortedMap.html" target="_top">SortedMap</a>
|
|||
|
|
|
|||
|
|
and
|
|||
|
|
<a class="ulink" href="http://download.oracle.com/javase/1.5.0/docs/api/java/util/SortedSet.html" target="_top">SortedSet</a>
|
|||
|
|
|
|||
|
|
interfaces may be used with sorted collections. For example,
|
|||
|
|
submaps and subsets may be created.
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The output of the example program shows that records are sorted
|
|||
|
|
by key value.
|
|||
|
|
</p>
|
|||
|
|
<pre class="programlisting">Adding Suppliers
|
|||
|
|
Adding Parts
|
|||
|
|
Adding Shipments
|
|||
|
|
|
|||
|
|
--- Parts ---
|
|||
|
|
Part: number=P1 name=Nut color=Red weight=[12.0 grams] city=London
|
|||
|
|
Part: number=P2 name=Bolt color=Green weight=[17.0 grams] city=Paris
|
|||
|
|
Part: number=P3 name=Screw color=Blue weight=[17.0 grams] city=Rome
|
|||
|
|
Part: number=P4 name=Screw color=Red weight=[14.0 grams] city=London
|
|||
|
|
Part: number=P5 name=Cam color=Blue weight=[12.0 grams] city=Paris
|
|||
|
|
Part: number=P6 name=Cog color=Red weight=[19.0 grams] city=London
|
|||
|
|
|
|||
|
|
--- Suppliers ---
|
|||
|
|
Supplier: number=S1 name=Smith status=20 city=London
|
|||
|
|
Supplier: number=S2 name=Jones status=10 city=Paris
|
|||
|
|
Supplier: number=S3 name=Blake status=30 city=Paris
|
|||
|
|
Supplier: number=S4 name=Clark status=20 city=London
|
|||
|
|
Supplier: number=S5 name=Adams status=30 city=Athens
|
|||
|
|
|
|||
|
|
--- Suppliers for City Paris ---
|
|||
|
|
Supplier: number=S2 name=Jones status=10 city=Paris
|
|||
|
|
Supplier: number=S3 name=Blake status=30 city=Paris
|
|||
|
|
|
|||
|
|
--- Shipments ---
|
|||
|
|
Shipment: part=P1 supplier=S1 quantity=300
|
|||
|
|
Shipment: part=P1 supplier=S2 quantity=300
|
|||
|
|
Shipment: part=P2 supplier=S1 quantity=200
|
|||
|
|
Shipment: part=P2 supplier=S2 quantity=400
|
|||
|
|
Shipment: part=P2 supplier=S3 quantity=200
|
|||
|
|
Shipment: part=P2 supplier=S4 quantity=200
|
|||
|
|
Shipment: part=P3 supplier=S1 quantity=400
|
|||
|
|
Shipment: part=P4 supplier=S1 quantity=200
|
|||
|
|
Shipment: part=P4 supplier=S4 quantity=300
|
|||
|
|
Shipment: part=P5 supplier=S1 quantity=100
|
|||
|
|
Shipment: part=P5 supplier=S4 quantity=400
|
|||
|
|
Shipment: part=P6 supplier=S1 quantity=100
|
|||
|
|
|
|||
|
|
--- Shipments for Part P1 ---
|
|||
|
|
Shipment: part=P1 supplier=S1 quantity=300
|
|||
|
|
Shipment: part=P1 supplier=S2 quantity=300
|
|||
|
|
|
|||
|
|
--- Shipments for Supplier S1 ---
|
|||
|
|
Shipment: part=P1 supplier=S1 quantity=300
|
|||
|
|
Shipment: part=P2 supplier=S1 quantity=200
|
|||
|
|
Shipment: part=P3 supplier=S1 quantity=400
|
|||
|
|
Shipment: part=P4 supplier=S1 quantity=200
|
|||
|
|
Shipment: part=P5 supplier=S1 quantity=100
|
|||
|
|
Shipment: part=P6 supplier=S1 quantity=100 </pre>
|
|||
|
|
</div>
|
|||
|
|
<div class="navfooter">
|
|||
|
|
<hr />
|
|||
|
|
<table width="100%" summary="Navigation footer">
|
|||
|
|
<tr>
|
|||
|
|
<td width="40%" align="left"><a accesskey="p" href="tuple-serialentitybindings.html">Prev</a> </td>
|
|||
|
|
<td width="20%" align="center">
|
|||
|
|
<a accesskey="u" href="Tuple.html">Up</a>
|
|||
|
|
</td>
|
|||
|
|
<td width="40%" align="right"> <a accesskey="n" href="SerializableEntity.html">Next</a></td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td width="40%" align="left" valign="top">
|
|||
|
|
Creating Tuple-Serial Entity Bindings
|
|||
|
|
</td>
|
|||
|
|
<td width="20%" align="center">
|
|||
|
|
<a accesskey="h" href="index.html">Home</a>
|
|||
|
|
</td>
|
|||
|
|
<td width="40%" align="right" valign="top"> Chapter 6.
|
|||
|
|
Using Serializable Entities
|
|||
|
|
</td>
|
|||
|
|
</tr>
|
|||
|
|
</table>
|
|||
|
|
</div>
|
|||
|
|
</body>
|
|||
|
|
</html>
|