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192 lines
6.9 KiB
HTML
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>Chapter 7. Summary</title>
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<link rel="stylesheet" href="gettingStarted.css" type="text/css" />
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<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
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<link rel="start" href="index.html" title="Berkeley DB Java Edition Collections Tutorial" />
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<link rel="up" href="index.html" title="Berkeley DB Java Edition Collections Tutorial" />
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<link rel="prev" href="removingredundantvalueclasses.html" title="Removing the Redundant Value Classes" />
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<link rel="next" href="collectionOverview.html" title="Appendix A. API Notes and Details" />
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</head>
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<body>
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<div xmlns="" class="navheader">
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<div class="libver">
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<p>Library Version 12.2.7.5</p>
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</div>
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<table width="100%" summary="Navigation header">
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<tr>
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<th colspan="3" align="center">Chapter 7.
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Summary
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</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="removingredundantvalueclasses.html">Prev</a> </td>
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<th width="60%" align="center"> </th>
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<td width="20%" align="right"> <a accesskey="n" href="collectionOverview.html">Next</a></td>
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</tr>
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</table>
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<hr />
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</div>
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<div class="chapter" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h2 class="title"><a id="Summary"></a>Chapter 7.
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Summary
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</h2>
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</div>
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</div>
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</div>
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<p>
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In summary, the JE JE Collections API tutorial has
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demonstrated how to create different types of bindings, as well as
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how to use the basic facilities of the JE JE Collections API:
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the environment, databases, secondary indices, collections, and
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transactions. The final approach illustrated by the last example
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program, Serializable Entity, uses tuple keys and serial entity
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values. Hopefully it is clear that any type of object-to-data
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binding may be implemented by an application and used along with
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standard Java collections.
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</p>
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<p>
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The following table summarizes the differences between the
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examples in the tutorial.
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</p>
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<div class="informaltable">
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<table border="1" width="80%">
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<colgroup>
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<col />
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<col />
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<col />
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<col />
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<col />
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</colgroup>
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<thead>
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<tr>
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<th>Example</th>
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<th>Key</th>
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<th>Value</th>
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<th>Entity</th>
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<th>Comments</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td>
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<a class="xref" href="BasicProgram.html" title="Chapter 2. The Basic Program">
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The Basic Program
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</a>
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</td>
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<td>Serial</td>
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<td>Serial</td>
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<td>No</td>
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<td>The shipment program</td>
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</tr>
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<tr>
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<td>
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<a class="xref" href="UsingSecondaries.html" title="Chapter 3. Using Secondary Indices and Foreign keys">
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Using Secondary Indices<span> and Foreign keys</span>
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</a>
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</td>
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<td>Serial</td>
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<td>Serial</td>
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<td>No</td>
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<td>Secondary indices<span> and foreign keys</span></td>
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</tr>
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<tr>
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<td>
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<a class="xref" href="Entity.html" title="Chapter 4. Using Entity Classes">
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Using Entity Classes
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</a>
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</td>
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<td>Serial</td>
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<td>Serial</td>
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<td>Yes</td>
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<td>Combining the key and value in a single object</td>
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</tr>
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<tr>
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<td>
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<a class="xref" href="Tuple.html" title="Chapter 5. Using Tuples">
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Using Tuples
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</a>
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</td>
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<td>Tuple</td>
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<td>Serial</td>
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<td>Yes</td>
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<td>Compact ordered keys</td>
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</tr>
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<tr>
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<td>
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<a class="xref" href="SerializableEntity.html" title="Chapter 6. Using Serializable Entities">
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Using Serializable Entities
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</a>
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</td>
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<td>Tuple</td>
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<td>Serial</td>
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<td>Yes</td>
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<td>One serializable class for entities and values</td>
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</tr>
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</tbody>
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</table>
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</div>
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<p>
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Having completed this tutorial, you may want to explore how other types of
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bindings can be implemented. The bindings shown in this tutorial
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are all <span class="emphasis"><em>external bindings</em></span>, meaning that the data classes
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themselves contain none of the binding implementation. It is also
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possible to implement <span class="emphasis"><em>internal bindings</em></span>, where the data
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classes implement the binding.
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</p>
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<p>
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Internal bindings are called <span class="emphasis"><em>marshalled bindings</em></span> in the
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JE JE Collections API, and in this model each data class
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implements a marshalling interface. A single external binding class
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that understands the marshalling interface is used to call the
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internal bindings of each data object, and therefore the overall
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model and API is unchanged. To learn about marshalled bindings, see
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the
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<span class="pdf;html">
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<code class="literal">marshal</code> and <code class="literal">factory</code> examples that
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came with your JE distribution (you can find them in
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<code class="filename"><INSTALL_DIR>/examples/collections/ship</code>
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where <code class="literal"><INSTALL_DIR></code> is the location where you
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unpacked your JE distribution).
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</span>
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These examples continue building on
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the example programs used in the tutorial. The Marshal program is
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the next program following the Serializable Entity program, and the
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Factory program follows the Marshal program. The source code
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comments in these examples explain their differences.
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</p>
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||
</div>
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||
<div class="navfooter">
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||
<hr />
|
||
<table width="100%" summary="Navigation footer">
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||
<tr>
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||
<td width="40%" align="left"><a accesskey="p" href="removingredundantvalueclasses.html">Prev</a> </td>
|
||
<td width="20%" align="center"> </td>
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||
<td width="40%" align="right"> <a accesskey="n" href="collectionOverview.html">Next</a></td>
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||
</tr>
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||
<tr>
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||
<td width="40%" align="left" valign="top">
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||
Removing the Redundant Value Classes
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</td>
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||
<td width="20%" align="center">
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||
<a accesskey="h" href="index.html">Home</a>
|
||
</td>
|
||
<td width="40%" align="right" valign="top"> Appendix A.
|
||
API Notes and Details
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</td>
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||
</tr>
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||
</table>
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||
</div>
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||
</body>
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||
</html>
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