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<div class="subTitle">org.apache.mahout.cf.taste.impl.model</div>
<h2 title="Class AbstractJDBCIDMigrator" class="title">Class AbstractJDBCIDMigrator</h2>
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<li><a href="../../../../../../../org/apache/mahout/cf/taste/impl/model/AbstractIDMigrator.html" title="class in org.apache.mahout.cf.taste.impl.model">org.apache.mahout.cf.taste.impl.model.AbstractIDMigrator</a></li>
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<li>org.apache.mahout.cf.taste.impl.model.AbstractJDBCIDMigrator</li>
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<dt>All Implemented Interfaces:</dt>
<dd><a href="../../../../../../../org/apache/mahout/cf/taste/common/Refreshable.html" title="interface in org.apache.mahout.cf.taste.common">Refreshable</a>, <a href="../../../../../../../org/apache/mahout/cf/taste/model/IDMigrator.html" title="interface in org.apache.mahout.cf.taste.model">IDMigrator</a>, <a href="../../../../../../../org/apache/mahout/cf/taste/model/UpdatableIDMigrator.html" title="interface in org.apache.mahout.cf.taste.model">UpdatableIDMigrator</a></dd>
</dl>
<dl>
<dt>Direct Known Subclasses:</dt>
<dd><a href="../../../../../../../org/apache/mahout/cf/taste/impl/model/MySQLJDBCIDMigrator.html" title="class in org.apache.mahout.cf.taste.impl.model">MySQLJDBCIDMigrator</a></dd>
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<pre>public abstract class <span class="typeNameLabel">AbstractJDBCIDMigrator</span>
extends <a href="../../../../../../../org/apache/mahout/cf/taste/impl/model/AbstractIDMigrator.html" title="class in org.apache.mahout.cf.taste.impl.model">AbstractIDMigrator</a>
implements <a href="../../../../../../../org/apache/mahout/cf/taste/model/UpdatableIDMigrator.html" title="interface in org.apache.mahout.cf.taste.model">UpdatableIDMigrator</a></pre>
<div class="block">Implementation which stores the reverse long-to-String mapping in a database. Subclasses can override and
configure the class to operate with particular databases by supplying appropriate SQL statements to the
constructor.</div>
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<caption><span>Fields</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
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<tr class="altColor">
<td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/model/AbstractJDBCIDMigrator.html#DEFAULT_LONG_ID_COLUMN">DEFAULT_LONG_ID_COLUMN</a></span></code>&nbsp;</td>
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<tr class="rowColor">
<td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/model/AbstractJDBCIDMigrator.html#DEFAULT_MAPPING_TABLE">DEFAULT_MAPPING_TABLE</a></span></code>&nbsp;</td>
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<tr class="altColor">
<td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/model/AbstractJDBCIDMigrator.html#DEFAULT_STRING_ID_COLUMN">DEFAULT_STRING_ID_COLUMN</a></span></code>&nbsp;</td>
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<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/model/AbstractJDBCIDMigrator.html#AbstractJDBCIDMigrator-javax.sql.DataSource-java.lang.String-java.lang.String-">AbstractJDBCIDMigrator</a></span>(<a href="http://docs.oracle.com/javase/7/docs/api/javax/sql/DataSource.html?is-external=true" title="class or interface in javax.sql">DataSource</a>&nbsp;dataSource,
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;getStringIDSQL,
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;storeMappingSQL)</code>&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/model/AbstractJDBCIDMigrator.html#initialize-java.lang.Iterable-">initialize</a></span>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a>&lt;<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&gt;&nbsp;stringIDs)</code>
<div class="block">Make the mapping aware of the given string IDs.</div>
</td>
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<tr id="i1" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/model/AbstractJDBCIDMigrator.html#storeMapping-long-java.lang.String-">storeMapping</a></span>(long&nbsp;longID,
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;stringID)</code>
<div class="block">Stores the reverse long-to-String mapping in some kind of backing store.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/model/AbstractJDBCIDMigrator.html#toStringID-long-">toStringID</a></span>(long&nbsp;longID)</code>&nbsp;</td>
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<h3>Methods inherited from class&nbsp;org.apache.mahout.cf.taste.impl.model.<a href="../../../../../../../org/apache/mahout/cf/taste/impl/model/AbstractIDMigrator.html" title="class in org.apache.mahout.cf.taste.impl.model">AbstractIDMigrator</a></h3>
<code><a href="../../../../../../../org/apache/mahout/cf/taste/impl/model/AbstractIDMigrator.html#hash-java.lang.String-">hash</a>, <a href="../../../../../../../org/apache/mahout/cf/taste/impl/model/AbstractIDMigrator.html#refresh-java.util.Collection-">refresh</a>, <a href="../../../../../../../org/apache/mahout/cf/taste/impl/model/AbstractIDMigrator.html#toLongID-java.lang.String-">toLongID</a></code></li>
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<h3>Methods inherited from class&nbsp;java.lang.<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3>
<code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
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<h3>Methods inherited from interface&nbsp;org.apache.mahout.cf.taste.model.<a href="../../../../../../../org/apache/mahout/cf/taste/model/IDMigrator.html" title="interface in org.apache.mahout.cf.taste.model">IDMigrator</a></h3>
<code><a href="../../../../../../../org/apache/mahout/cf/taste/model/IDMigrator.html#toLongID-java.lang.String-">toLongID</a></code></li>
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<h3>Methods inherited from interface&nbsp;org.apache.mahout.cf.taste.common.<a href="../../../../../../../org/apache/mahout/cf/taste/common/Refreshable.html" title="interface in org.apache.mahout.cf.taste.common">Refreshable</a></h3>
<code><a href="../../../../../../../org/apache/mahout/cf/taste/common/Refreshable.html#refresh-java.util.Collection-">refresh</a></code></li>
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<h4>DEFAULT_MAPPING_TABLE</h4>
<pre>public static final&nbsp;<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> DEFAULT_MAPPING_TABLE</pre>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../../../constant-values.html#org.apache.mahout.cf.taste.impl.model.AbstractJDBCIDMigrator.DEFAULT_MAPPING_TABLE">Constant Field Values</a></dd>
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<h4>DEFAULT_LONG_ID_COLUMN</h4>
<pre>public static final&nbsp;<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> DEFAULT_LONG_ID_COLUMN</pre>
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<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../../../constant-values.html#org.apache.mahout.cf.taste.impl.model.AbstractJDBCIDMigrator.DEFAULT_LONG_ID_COLUMN">Constant Field Values</a></dd>
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<h4>DEFAULT_STRING_ID_COLUMN</h4>
<pre>public static final&nbsp;<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> DEFAULT_STRING_ID_COLUMN</pre>
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<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../../../constant-values.html#org.apache.mahout.cf.taste.impl.model.AbstractJDBCIDMigrator.DEFAULT_STRING_ID_COLUMN">Constant Field Values</a></dd>
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<h4>AbstractJDBCIDMigrator</h4>
<pre>protected&nbsp;AbstractJDBCIDMigrator(<a href="http://docs.oracle.com/javase/7/docs/api/javax/sql/DataSource.html?is-external=true" title="class or interface in javax.sql">DataSource</a>&nbsp;dataSource,
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;getStringIDSQL,
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;storeMappingSQL)</pre>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>getStringIDSQL</code> - SQL statement which selects one column, the String ID, from a mapping table. The statement
should take one long parameter.</dd>
<dd><code>storeMappingSQL</code> - SQL statement which saves a mapping from long to String. It should take two parameters, a long
and a String.</dd>
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<h4>storeMapping</h4>
<pre>public final&nbsp;void&nbsp;storeMapping(long&nbsp;longID,
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;stringID)
throws <a href="../../../../../../../org/apache/mahout/cf/taste/common/TasteException.html" title="class in org.apache.mahout.cf.taste.common">TasteException</a></pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../../org/apache/mahout/cf/taste/model/UpdatableIDMigrator.html#storeMapping-long-java.lang.String-">UpdatableIDMigrator</a></code></span></div>
<div class="block">Stores the reverse long-to-String mapping in some kind of backing store. Note that this must be called
directly (or indirectly through <a href="../../../../../../../org/apache/mahout/cf/taste/model/UpdatableIDMigrator.html#initialize-java.lang.Iterable-"><code>UpdatableIDMigrator.initialize(Iterable)</code></a>) for every String that might be encountered
in the application, or else the mapping will not be known.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../org/apache/mahout/cf/taste/model/UpdatableIDMigrator.html#storeMapping-long-java.lang.String-">storeMapping</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/mahout/cf/taste/model/UpdatableIDMigrator.html" title="interface in org.apache.mahout.cf.taste.model">UpdatableIDMigrator</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>longID</code> - long ID</dd>
<dd><code>stringID</code> - string ID that maps to/from that long ID</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="../../../../../../../org/apache/mahout/cf/taste/common/TasteException.html" title="class in org.apache.mahout.cf.taste.common">TasteException</a></code> - if an error occurs while saving the mapping</dd>
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<h4>toStringID</h4>
<pre>public final&nbsp;<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;toStringID(long&nbsp;longID)
throws <a href="../../../../../../../org/apache/mahout/cf/taste/common/TasteException.html" title="class in org.apache.mahout.cf.taste.common">TasteException</a></pre>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../org/apache/mahout/cf/taste/model/IDMigrator.html#toStringID-long-">toStringID</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/mahout/cf/taste/model/IDMigrator.html" title="interface in org.apache.mahout.cf.taste.model">IDMigrator</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the string ID most recently associated with the given long ID, or null if doesn't exist</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="../../../../../../../org/apache/mahout/cf/taste/common/TasteException.html" title="class in org.apache.mahout.cf.taste.common">TasteException</a></code> - if an error occurs while retrieving the mapping</dd>
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<h4>initialize</h4>
<pre>public&nbsp;void&nbsp;initialize(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a>&lt;<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&gt;&nbsp;stringIDs)
throws <a href="../../../../../../../org/apache/mahout/cf/taste/common/TasteException.html" title="class in org.apache.mahout.cf.taste.common">TasteException</a></pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../../org/apache/mahout/cf/taste/model/UpdatableIDMigrator.html#initialize-java.lang.Iterable-">UpdatableIDMigrator</a></code></span></div>
<div class="block">Make the mapping aware of the given string IDs. This must be called initially before the implementation
is used, or else it will not be aware of reverse long-to-String mappings.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../org/apache/mahout/cf/taste/model/UpdatableIDMigrator.html#initialize-java.lang.Iterable-">initialize</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/mahout/cf/taste/model/UpdatableIDMigrator.html" title="interface in org.apache.mahout.cf.taste.model">UpdatableIDMigrator</a></code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="../../../../../../../org/apache/mahout/cf/taste/common/TasteException.html" title="class in org.apache.mahout.cf.taste.common">TasteException</a></code> - if an error occurs while storing the mappings</dd>
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