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| <h1><a class="toc-backref" href="#id2" role="doc-backlink">High-Level Overview</a><a class="headerlink" href="#high-level-overview" title="Permalink to this heading">#</a></h1> |
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| <p>The Apache Arrow Java modules implement various specifications including the |
| columnar format and IPC. Most modules are native Java implementations, |
| but some modules are JNI bindings to the C++ library.</p> |
| <table class="table" id="id1"> |
| <caption><span class="caption-text">Arrow Java Modules</span><a class="headerlink" href="#id1" title="Permalink to this table">#</a></caption> |
| <colgroup> |
| <col style="width: 25.0%" /> |
| <col style="width: 50.0%" /> |
| <col style="width: 25.0%" /> |
| </colgroup> |
| <thead> |
| <tr class="row-odd"><th class="head"><p>Module</p></th> |
| <th class="head"><p>Description</p></th> |
| <th class="head"><p>Implementation</p></th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr class="row-even"><td><p>arrow-format</p></td> |
| <td><p>Generated Java files from the IPC Flatbuffer definitions.</p></td> |
| <td><p>Native</p></td> |
| </tr> |
| <tr class="row-odd"><td><p>arrow-memory-core</p></td> |
| <td><p>Core off-heap memory management libraries for Arrow ValueVectors.</p></td> |
| <td><p>Native</p></td> |
| </tr> |
| <tr class="row-even"><td><p>arrow-memory-unsafe</p></td> |
| <td><p>Memory management implementation based on sun.misc.Unsafe.</p></td> |
| <td><p>Native</p></td> |
| </tr> |
| <tr class="row-odd"><td><p>arrow-memory-netty</p></td> |
| <td><p>Memory management implementation based on Netty.</p></td> |
| <td><p>Native</p></td> |
| </tr> |
| <tr class="row-even"><td><p>arrow-vector</p></td> |
| <td><p>An off-heap reference implementation for Arrow columnar data format.</p></td> |
| <td><p>Native</p></td> |
| </tr> |
| <tr class="row-odd"><td><p>arrow-tools</p></td> |
| <td><p>Java applications for working with Arrow ValueVectors.</p></td> |
| <td><p>Native</p></td> |
| </tr> |
| <tr class="row-even"><td><p>arrow-jdbc</p></td> |
| <td><p>(Experimental) A library for converting JDBC data to Arrow data.</p></td> |
| <td><p>Native</p></td> |
| </tr> |
| <tr class="row-odd"><td><p>flight-core</p></td> |
| <td><p>(Experimental) An RPC mechanism for transferring ValueVectors.</p></td> |
| <td><p>Native</p></td> |
| </tr> |
| <tr class="row-even"><td><p>flight-sql</p></td> |
| <td><p>(Experimental) Contains utility classes to expose Flight SQL semantics for clients and servers over Arrow Flight.</p></td> |
| <td><p>Native</p></td> |
| </tr> |
| <tr class="row-odd"><td><p>flight-integration-tests</p></td> |
| <td><p>Integration tests for Flight RPC.</p></td> |
| <td><p>Native</p></td> |
| </tr> |
| <tr class="row-even"><td><p>arrow-performance</p></td> |
| <td><p>JMH benchmarks for the Arrow libraries.</p></td> |
| <td><p>Native</p></td> |
| </tr> |
| <tr class="row-odd"><td><p>arrow-algorithm</p></td> |
| <td><p>(Experimental) A collection of algorithms for working with ValueVectors.</p></td> |
| <td><p>Native</p></td> |
| </tr> |
| <tr class="row-even"><td><p>arrow-avro</p></td> |
| <td><p>(Experimental) A library for converting Avro data to Arrow data.</p></td> |
| <td><p>Native</p></td> |
| </tr> |
| <tr class="row-odd"><td><p>arrow-compression</p></td> |
| <td><p>(Experimental) A library for working with compression/decompression of Arrow data.</p></td> |
| <td><p>Native</p></td> |
| </tr> |
| <tr class="row-even"><td><p>arrow-c-data</p></td> |
| <td><p>Java implementation of <a class="reference external" href="https://arrow.apache.org/docs/format/CDataInterface.html">C Data Interface</a></p></td> |
| <td><p>JNI</p></td> |
| </tr> |
| <tr class="row-odd"><td><p>arrow-orc</p></td> |
| <td><p>(Experimental) A JNI wrapper for the C++ ORC reader implementation.</p></td> |
| <td><p>JNI</p></td> |
| </tr> |
| <tr class="row-even"><td><p>arrow-gandiva</p></td> |
| <td><p>Java wrappers around the native Gandiva SQL expression compiler.</p></td> |
| <td><p>JNI</p></td> |
| </tr> |
| <tr class="row-odd"><td><p>arrow-dataset</p></td> |
| <td><p>Java bindings to the Arrow Datasets library.</p></td> |
| <td><p>JNI</p></td> |
| </tr> |
| </tbody> |
| </table> |
| <p>Arrow Java modules support working with data (1) in-memory, (2) at rest, and (3) on-the-wire.</p> |
| </section> |
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