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<h2 title="Class TupleTupleKeyCreator" class="title">Class TupleTupleKeyCreator<E></h2>
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<ul class="inheritance">
<li>java.lang.Object</li>
<li>
<ul class="inheritance">
<li><a href="../../../../com/sleepycat/bind/tuple/TupleBase.html" title="class in com.sleepycat.bind.tuple">com.sleepycat.bind.tuple.TupleBase</a><E></li>
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<ul class="inheritance">
<li>com.sleepycat.bind.tuple.TupleTupleKeyCreator<E></li>
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<dt>All Implemented Interfaces:</dt>
<dd><a href="../../../../com/sleepycat/db/ForeignKeyNullifier.html" title="interface in com.sleepycat.db">ForeignKeyNullifier</a>, <a href="../../../../com/sleepycat/db/SecondaryKeyCreator.html" title="interface in com.sleepycat.db">SecondaryKeyCreator</a></dd>
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<dt>Direct Known Subclasses:</dt>
<dd><a href="../../../../com/sleepycat/bind/tuple/TupleTupleMarshalledKeyCreator.html" title="class in com.sleepycat.bind.tuple">TupleTupleMarshalledKeyCreator</a></dd>
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<pre>public abstract class <span class="strong">TupleTupleKeyCreator<E></span>
extends <a href="../../../../com/sleepycat/bind/tuple/TupleBase.html" title="class in com.sleepycat.bind.tuple">TupleBase</a><E>
implements <a href="../../../../com/sleepycat/db/SecondaryKeyCreator.html" title="interface in com.sleepycat.db">SecondaryKeyCreator</a>, <a href="../../../../com/sleepycat/db/ForeignKeyNullifier.html" title="interface in com.sleepycat.db">ForeignKeyNullifier</a></pre>
<div class="block">An abstract key creator that uses a tuple key and a tuple data entry. This
class takes care of converting the key and data entry to/from <a href="../../../../com/sleepycat/bind/tuple/TupleInput.html" title="class in com.sleepycat.bind.tuple"><code>TupleInput</code></a> and <a href="../../../../com/sleepycat/bind/tuple/TupleOutput.html" title="class in com.sleepycat.bind.tuple"><code>TupleOutput</code></a> objects.
The following abstract method must be implemented by a concrete subclass
to create the index key using these objects
<ul>
<li> <a href="../../../../com/sleepycat/bind/tuple/TupleTupleKeyCreator.html#createSecondaryKey(com.sleepycat.bind.tuple.TupleInput,%20com.sleepycat.bind.tuple.TupleInput,%20com.sleepycat.bind.tuple.TupleOutput)"><code>createSecondaryKey(TupleInput,TupleInput,TupleOutput)</code></a> </li>
</ul>
<p>If <a href="../../../../com/sleepycat/db/ForeignKeyDeleteAction.html#NULLIFY"><code>ForeignKeyDeleteAction.NULLIFY</code></a> was
specified when opening the secondary database, the following method must be
overridden to nullify the foreign index key. If NULLIFY was not specified,
this method need not be overridden.</p>
<ul>
<li> <a href="../../../../com/sleepycat/bind/tuple/TupleTupleKeyCreator.html#nullifyForeignKey(com.sleepycat.bind.tuple.TupleInput,%20com.sleepycat.bind.tuple.TupleOutput)"><code>nullifyForeignKey(TupleInput,TupleOutput)</code></a> </li>
</ul>
<p>If <a href="../../../../com/sleepycat/db/ForeignKeyDeleteAction.html#NULLIFY"><code>ForeignKeyDeleteAction.NULLIFY</code></a> was
specified when creating the secondary, this method is called when the
entity for this foreign key is deleted. If NULLIFY was not specified,
this method will not be called and may always return false.</p></div>
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<th class="colOne" scope="col">Constructor and Description</th>
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<tr class="altColor">
<td class="colOne"><code><strong><a href="../../../../com/sleepycat/bind/tuple/TupleTupleKeyCreator.html#TupleTupleKeyCreator()">TupleTupleKeyCreator</a></strong>()</code>
<div class="block">Creates a tuple-tuple key creator.</div>
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<caption><span>Methods</span><span class="tabEnd"> </span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../com/sleepycat/bind/tuple/TupleTupleKeyCreator.html#createSecondaryKey(com.sleepycat.db.SecondaryDatabase,%20com.sleepycat.db.DatabaseEntry,%20com.sleepycat.db.DatabaseEntry,%20com.sleepycat.db.DatabaseEntry)">createSecondaryKey</a></strong>(<a href="../../../../com/sleepycat/db/SecondaryDatabase.html" title="class in com.sleepycat.db">SecondaryDatabase</a> db,
<a href="../../../../com/sleepycat/db/DatabaseEntry.html" title="class in com.sleepycat.db">DatabaseEntry</a> primaryKeyEntry,
<a href="../../../../com/sleepycat/db/DatabaseEntry.html" title="class in com.sleepycat.db">DatabaseEntry</a> dataEntry,
<a href="../../../../com/sleepycat/db/DatabaseEntry.html" title="class in com.sleepycat.db">DatabaseEntry</a> indexKeyEntry)</code>
<div class="block">Creates a secondary key entry, given a primary key and data entry.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>abstract boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../com/sleepycat/bind/tuple/TupleTupleKeyCreator.html#createSecondaryKey(com.sleepycat.bind.tuple.TupleInput,%20com.sleepycat.bind.tuple.TupleInput,%20com.sleepycat.bind.tuple.TupleOutput)">createSecondaryKey</a></strong>(<a href="../../../../com/sleepycat/bind/tuple/TupleInput.html" title="class in com.sleepycat.bind.tuple">TupleInput</a> primaryKeyInput,
<a href="../../../../com/sleepycat/bind/tuple/TupleInput.html" title="class in com.sleepycat.bind.tuple">TupleInput</a> dataInput,
<a href="../../../../com/sleepycat/bind/tuple/TupleOutput.html" title="class in com.sleepycat.bind.tuple">TupleOutput</a> indexKeyOutput)</code>
<div class="block">Creates the index key from primary key tuple and data tuple.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../com/sleepycat/bind/tuple/TupleTupleKeyCreator.html#nullifyForeignKey(com.sleepycat.db.SecondaryDatabase,%20com.sleepycat.db.DatabaseEntry)">nullifyForeignKey</a></strong>(<a href="../../../../com/sleepycat/db/SecondaryDatabase.html" title="class in com.sleepycat.db">SecondaryDatabase</a> db,
<a href="../../../../com/sleepycat/db/DatabaseEntry.html" title="class in com.sleepycat.db">DatabaseEntry</a> dataEntry)</code>
<div class="block">Sets the foreign key reference to null in the datum of the primary
database.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../com/sleepycat/bind/tuple/TupleTupleKeyCreator.html#nullifyForeignKey(com.sleepycat.bind.tuple.TupleInput,%20com.sleepycat.bind.tuple.TupleOutput)">nullifyForeignKey</a></strong>(<a href="../../../../com/sleepycat/bind/tuple/TupleInput.html" title="class in com.sleepycat.bind.tuple">TupleInput</a> dataInput,
<a href="../../../../com/sleepycat/bind/tuple/TupleOutput.html" title="class in com.sleepycat.bind.tuple">TupleOutput</a> dataOutput)</code>
<div class="block">Clears the index key in the tuple data entry.</div>
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<h3>Methods inherited from class com.sleepycat.bind.tuple.<a href="../../../../com/sleepycat/bind/tuple/TupleBase.html" title="class in com.sleepycat.bind.tuple">TupleBase</a></h3>
<code><a href="../../../../com/sleepycat/bind/tuple/TupleBase.html#entryToInput(com.sleepycat.db.DatabaseEntry)">entryToInput</a>, <a href="../../../../com/sleepycat/bind/tuple/TupleBase.html#getTupleBufferSize()">getTupleBufferSize</a>, <a href="../../../../com/sleepycat/bind/tuple/TupleBase.html#getTupleOutput(E)">getTupleOutput</a>, <a href="../../../../com/sleepycat/bind/tuple/TupleBase.html#inputToEntry(com.sleepycat.bind.tuple.TupleInput,%20com.sleepycat.db.DatabaseEntry)">inputToEntry</a>, <a href="../../../../com/sleepycat/bind/tuple/TupleBase.html#newOutput()">newOutput</a>, <a href="../../../../com/sleepycat/bind/tuple/TupleBase.html#newOutput(byte[])">newOutput</a>, <a href="../../../../com/sleepycat/bind/tuple/TupleBase.html#outputToEntry(com.sleepycat.bind.tuple.TupleOutput,%20com.sleepycat.db.DatabaseEntry)">outputToEntry</a>, <a href="../../../../com/sleepycat/bind/tuple/TupleBase.html#setTupleBufferSize(int)">setTupleBufferSize</a></code></li>
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<h3>Methods inherited from class java.lang.Object</h3>
<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
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<h4>TupleTupleKeyCreator</h4>
<pre>public TupleTupleKeyCreator()</pre>
<div class="block">Creates a tuple-tuple key creator.</div>
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<h3>Method Detail</h3>
<a name="createSecondaryKey(com.sleepycat.db.SecondaryDatabase, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.DatabaseEntry)">
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<h4>createSecondaryKey</h4>
<pre>public boolean createSecondaryKey(<a href="../../../../com/sleepycat/db/SecondaryDatabase.html" title="class in com.sleepycat.db">SecondaryDatabase</a> db,
<a href="../../../../com/sleepycat/db/DatabaseEntry.html" title="class in com.sleepycat.db">DatabaseEntry</a> primaryKeyEntry,
<a href="../../../../com/sleepycat/db/DatabaseEntry.html" title="class in com.sleepycat.db">DatabaseEntry</a> dataEntry,
<a href="../../../../com/sleepycat/db/DatabaseEntry.html" title="class in com.sleepycat.db">DatabaseEntry</a> indexKeyEntry)</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../com/sleepycat/db/SecondaryKeyCreator.html#createSecondaryKey(com.sleepycat.db.SecondaryDatabase,%20com.sleepycat.db.DatabaseEntry,%20com.sleepycat.db.DatabaseEntry,%20com.sleepycat.db.DatabaseEntry)">SecondaryKeyCreator</a></code></strong></div>
<div class="block">Creates a secondary key entry, given a primary key and data entry.
<p>
A secondary key may be derived from the primary key, primary data, or a
combination of the primary key and data. For secondary keys that are
optional, the key creator method may return false and the key/data pair
will not be indexed. To ensure the integrity of a secondary database the
key creator method must always return the same result for a given set of
input parameters.
<p></div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../com/sleepycat/db/SecondaryKeyCreator.html#createSecondaryKey(com.sleepycat.db.SecondaryDatabase,%20com.sleepycat.db.DatabaseEntry,%20com.sleepycat.db.DatabaseEntry,%20com.sleepycat.db.DatabaseEntry)">createSecondaryKey</a></code> in interface <code><a href="../../../../com/sleepycat/db/SecondaryKeyCreator.html" title="interface in com.sleepycat.db">SecondaryKeyCreator</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>db</code> - the database to which the secondary key will be added.
This parameter is passed for informational purposes but is not commonly
used.
<p></dd><dd><code>primaryKeyEntry</code> - the primary key entry. This parameter must not be modified
by this method.
<p></dd><dd><code>dataEntry</code> - the primary data entry. This parameter must not be modified
by this method.
<p></dd><dd><code>indexKeyEntry</code> - the secondary key created by this method.
<p></dd>
<dt><span class="strong">Returns:</span></dt><dd>true if a key was created, or false to indicate that the key is
not present.
<p></dd></dl>
</li>
</ul>
<a name="nullifyForeignKey(com.sleepycat.db.SecondaryDatabase, com.sleepycat.db.DatabaseEntry)">
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<ul class="blockList">
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<h4>nullifyForeignKey</h4>
<pre>public boolean nullifyForeignKey(<a href="../../../../com/sleepycat/db/SecondaryDatabase.html" title="class in com.sleepycat.db">SecondaryDatabase</a> db,
<a href="../../../../com/sleepycat/db/DatabaseEntry.html" title="class in com.sleepycat.db">DatabaseEntry</a> dataEntry)</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../com/sleepycat/db/ForeignKeyNullifier.html#nullifyForeignKey(com.sleepycat.db.SecondaryDatabase,%20com.sleepycat.db.DatabaseEntry)">ForeignKeyNullifier</a></code></strong></div>
<div class="block">Sets the foreign key reference to null in the datum of the primary
database.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../com/sleepycat/db/ForeignKeyNullifier.html#nullifyForeignKey(com.sleepycat.db.SecondaryDatabase,%20com.sleepycat.db.DatabaseEntry)">nullifyForeignKey</a></code> in interface <code><a href="../../../../com/sleepycat/db/ForeignKeyNullifier.html" title="interface in com.sleepycat.db">ForeignKeyNullifier</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>db</code> - the database in which the foreign key integrity
constraint is defined. This parameter is passed for informational
purposes but is not commonly used.</dd><dd><code>dataEntry</code> - the existing primary datum in which the foreign key
reference should be set to null. This parameter should be updated by
this method if it returns true.</dd>
<dt><span class="strong">Returns:</span></dt><dd>true if the datum was modified, or false to indicate that the
key is not present.</dd></dl>
</li>
</ul>
<a name="createSecondaryKey(com.sleepycat.bind.tuple.TupleInput, com.sleepycat.bind.tuple.TupleInput, com.sleepycat.bind.tuple.TupleOutput)">
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<ul class="blockList">
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<h4>createSecondaryKey</h4>
<pre>public abstract boolean createSecondaryKey(<a href="../../../../com/sleepycat/bind/tuple/TupleInput.html" title="class in com.sleepycat.bind.tuple">TupleInput</a> primaryKeyInput,
<a href="../../../../com/sleepycat/bind/tuple/TupleInput.html" title="class in com.sleepycat.bind.tuple">TupleInput</a> dataInput,
<a href="../../../../com/sleepycat/bind/tuple/TupleOutput.html" title="class in com.sleepycat.bind.tuple">TupleOutput</a> indexKeyOutput)</pre>
<div class="block">Creates the index key from primary key tuple and data tuple.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>primaryKeyInput</code> - is the <a href="../../../../com/sleepycat/bind/tuple/TupleInput.html" title="class in com.sleepycat.bind.tuple"><code>TupleInput</code></a> for the primary key
entry.</dd><dd><code>dataInput</code> - is the <a href="../../../../com/sleepycat/bind/tuple/TupleInput.html" title="class in com.sleepycat.bind.tuple"><code>TupleInput</code></a> for the data entry.</dd><dd><code>indexKeyOutput</code> - is the destination index key tuple.</dd>
<dt><span class="strong">Returns:</span></dt><dd>true if a key was created, or false to indicate that the key is
not present.</dd></dl>
</li>
</ul>
<a name="nullifyForeignKey(com.sleepycat.bind.tuple.TupleInput, com.sleepycat.bind.tuple.TupleOutput)">
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</a>
<ul class="blockListLast">
<li class="blockList">
<h4>nullifyForeignKey</h4>
<pre>public boolean nullifyForeignKey(<a href="../../../../com/sleepycat/bind/tuple/TupleInput.html" title="class in com.sleepycat.bind.tuple">TupleInput</a> dataInput,
<a href="../../../../com/sleepycat/bind/tuple/TupleOutput.html" title="class in com.sleepycat.bind.tuple">TupleOutput</a> dataOutput)</pre>
<div class="block">Clears the index key in the tuple data entry. The dataInput should be
read and then written to the dataOutput, clearing the index key in the
process.
<p>The secondary key should be output or removed by this method such
that <a href="../../../../com/sleepycat/bind/tuple/TupleTupleKeyCreator.html#createSecondaryKey(com.sleepycat.db.SecondaryDatabase,%20com.sleepycat.db.DatabaseEntry,%20com.sleepycat.db.DatabaseEntry,%20com.sleepycat.db.DatabaseEntry)"><code>createSecondaryKey(com.sleepycat.db.SecondaryDatabase, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.DatabaseEntry)</code></a> will return false. Other fields in the
data object should remain unchanged.</p></div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>dataInput</code> - is the <a href="../../../../com/sleepycat/bind/tuple/TupleInput.html" title="class in com.sleepycat.bind.tuple"><code>TupleInput</code></a> for the data entry.</dd><dd><code>dataOutput</code> - is the destination <a href="../../../../com/sleepycat/bind/tuple/TupleOutput.html" title="class in com.sleepycat.bind.tuple"><code>TupleOutput</code></a>.</dd>
<dt><span class="strong">Returns:</span></dt><dd>true if the key was cleared, or false to indicate that the key
is not present and no change is necessary.</dd></dl>
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