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Yasuhiro KIMURA
416 lines
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<div class="aboutLanguage"><b>Berkeley DB</b><br><font size="-1"> version 18.1.40</font></div>
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<div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">com.sleepycat.bind.serial</a></div>
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<h2 title="Class SerialOutput" class="title">Class SerialOutput</h2>
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<ul class="inheritance">
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<li>java.lang.Object</li>
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<li>java.io.OutputStream</li>
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<li>
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<ul class="inheritance">
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<li>java.io.ObjectOutputStream</li>
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<li>com.sleepycat.bind.serial.SerialOutput</li>
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<dt>All Implemented Interfaces:</dt>
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<dd><code>java.io.Closeable</code>, <code>java.io.DataOutput</code>, <code>java.io.Flushable</code>, <code>java.io.ObjectOutput</code>, <code>java.io.ObjectStreamConstants</code>, <code>java.lang.AutoCloseable</code></dd>
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<pre>public class <span class="typeNameLabel">SerialOutput</span>
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extends java.io.ObjectOutputStream</pre>
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<div class="block">A specialized <code>ObjectOutputStream</code> that stores class description
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information in a <code>ClassCatalog</code>. It is used by
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<code>SerialBinding</code>.
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<p>This class is used instead of an <code>ObjectOutputStream</code>, which it
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extends, to write a compact object stream. For writing objects to a
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database normally one of the serial binding classes is used. <a href="SerialOutput.html" title="class in com.sleepycat.bind.serial"><code>SerialOutput</code></a> is used when an <code>ObjectOutputStream</code> is needed along
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with compact storage. A <a href="ClassCatalog.html" title="interface in com.sleepycat.bind.serial"><code>ClassCatalog</code></a> must be supplied, however, to
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stored shared class descriptions.</p>
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<p>The <a href="ClassCatalog.html" title="interface in com.sleepycat.bind.serial"><code>ClassCatalog</code></a> is used to store class definitions rather than
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embedding these into the stream. Instead, a class format identifier is
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embedded into the stream. This identifier is then used by <a href="SerialInput.html" title="class in com.sleepycat.bind.serial"><code>SerialInput</code></a> to load the class format to deserialize the object.</p></div>
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<dt><span class="seeLabel">See Also:</span></dt>
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<dd><a href="SerialBinding.html#evolution">Class Evolution</a></dd>
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<code>java.io.ObjectOutputStream.PutField</code></li>
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<h3>Fields inherited from interface java.io.ObjectStreamConstants</h3>
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<code>baseWireHandle, PROTOCOL_VERSION_1, PROTOCOL_VERSION_2, SC_BLOCK_DATA, SC_ENUM, SC_EXTERNALIZABLE, SC_SERIALIZABLE, SC_WRITE_METHOD, SERIAL_FILTER_PERMISSION, STREAM_MAGIC, STREAM_VERSION, SUBCLASS_IMPLEMENTATION_PERMISSION, SUBSTITUTION_PERMISSION, TC_ARRAY, TC_BASE, TC_BLOCKDATA, TC_BLOCKDATALONG, TC_CLASS, TC_CLASSDESC, TC_ENDBLOCKDATA, TC_ENUM, TC_EXCEPTION, TC_LONGSTRING, TC_MAX, TC_NULL, TC_OBJECT, TC_PROXYCLASSDESC, TC_REFERENCE, TC_RESET, TC_STRING</code></li>
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<caption><span>Constructors</span><span class="tabEnd"> </span></caption>
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<tr>
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<th class="colFirst" scope="col">Constructor</th>
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<th class="colLast" scope="col">Description</th>
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</tr>
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<tr class="altColor">
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#SerialOutput-java.io.OutputStream-com.sleepycat.bind.serial.ClassCatalog-">SerialOutput</a></span>​(java.io.OutputStream out,
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<a href="ClassCatalog.html" title="interface in com.sleepycat.bind.serial">ClassCatalog</a> classCatalog)</code></th>
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<td class="colLast">
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<div class="block">Creates a serial output stream.</div>
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</td>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<th class="colLast" scope="col">Description</th>
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</tr>
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<tr id="i0" class="altColor">
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<td class="colFirst"><code>static byte[]</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getStreamHeader--">getStreamHeader</a></span>()</code></th>
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<td class="colLast">
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<div class="block">Returns the fixed stream header used for all serialized streams in
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PROTOCOL_VERSION_2 format.</div>
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</td>
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</tr>
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<tr id="i1" class="rowColor">
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<td class="colFirst"><code>protected void</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#writeClassDescriptor-java.io.ObjectStreamClass-">writeClassDescriptor</a></span>​(java.io.ObjectStreamClass classdesc)</code></th>
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<h3>Methods inherited from class java.io.ObjectOutputStream</h3>
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<code>annotateClass, annotateProxyClass, close, defaultWriteObject, drain, enableReplaceObject, flush, putFields, replaceObject, reset, useProtocolVersion, write, write, write, writeBoolean, writeByte, writeBytes, writeChar, writeChars, writeDouble, writeFields, writeFloat, writeInt, writeLong, writeObject, writeObjectOverride, writeShort, writeStreamHeader, writeUnshared, writeUTF</code></li>
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<h3>Methods inherited from class java.io.OutputStream</h3>
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<code>nullOutputStream</code></li>
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<h3>Methods inherited from class java.lang.Object</h3>
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<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
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<!-- ========= CONSTRUCTOR DETAIL ======== -->
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<h3>Constructor Detail</h3>
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<a name="SerialOutput-java.io.OutputStream-com.sleepycat.bind.serial.ClassCatalog-">
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<!-- -->
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<h4>SerialOutput</h4>
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<pre>public SerialOutput​(java.io.OutputStream out,
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<a href="ClassCatalog.html" title="interface in com.sleepycat.bind.serial">ClassCatalog</a> classCatalog)
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throws java.io.IOException</pre>
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<div class="block">Creates a serial output stream.</div>
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<dl>
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>out</code> - is the output stream to which the compact serialized objects
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will be written.</dd>
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<dd><code>classCatalog</code> - is the catalog to which the class descriptions for
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the serialized objects will be written.</dd>
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<dt><span class="throwsLabel">Throws:</span></dt>
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<dd><code>java.io.IOException</code> - if an I/O error occurs while writing stream header.</dd>
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</dl>
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</li>
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<h3>Method Detail</h3>
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<a name="writeClassDescriptor-java.io.ObjectStreamClass-">
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<h4>writeClassDescriptor</h4>
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<pre class="methodSignature">protected void writeClassDescriptor​(java.io.ObjectStreamClass classdesc)
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throws java.io.IOException</pre>
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<dl>
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<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
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<dd><code>writeClassDescriptor</code> in class <code>java.io.ObjectOutputStream</code></dd>
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<dt><span class="throwsLabel">Throws:</span></dt>
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<dd><code>java.io.IOException</code></dd>
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</dl>
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</li>
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</ul>
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<a name="getStreamHeader--">
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<!-- -->
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</a>
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<h4>getStreamHeader</h4>
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<pre class="methodSignature">public static byte[] getStreamHeader()</pre>
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<div class="block">Returns the fixed stream header used for all serialized streams in
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PROTOCOL_VERSION_2 format. To save space this header can be removed and
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serialized streams before storage and inserted before deserializing.
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<a href="SerialOutput.html" title="class in com.sleepycat.bind.serial"><code>SerialOutput</code></a> always uses PROTOCOL_VERSION_2 serialization format
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to guarantee that this header is fixed. <a href="SerialBinding.html" title="class in com.sleepycat.bind.serial"><code>SerialBinding</code></a> removes
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this header from serialized streams automatically.</div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>the fixed stream header.</dd>
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</dl>
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</li>
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</ul>
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</li>
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