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| <h2 title="Class AvroFileAccessor" class="title">Class AvroFileAccessor</h2> |
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| <ul class="inheritance"> |
| <li>java.lang.Object</li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="../../../../../../org/apache/hawq/pxf/api/utilities/Plugin.html" title="class in org.apache.hawq.pxf.api.utilities">org.apache.hawq.pxf.api.utilities.Plugin</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html" title="class in org.apache.hawq.pxf.plugins.hdfs">org.apache.hawq.pxf.plugins.hdfs.HdfsSplittableDataAccessor</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.hawq.pxf.plugins.hdfs.AvroFileAccessor</li> |
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| <pre>public class <span class="typeNameLabel">AvroFileAccessor</span> |
| extends <a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html" title="class in org.apache.hawq.pxf.plugins.hdfs">HdfsSplittableDataAccessor</a></pre> |
| <div class="block">A PXF Accessor for reading Avro File records</div> |
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| <h3>Fields inherited from class org.apache.hawq.pxf.plugins.hdfs.<a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html" title="class in org.apache.hawq.pxf.plugins.hdfs">HdfsSplittableDataAccessor</a></h3> |
| <code><a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html#conf">conf</a>, <a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html#data">data</a>, <a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html#inputFormat">inputFormat</a>, <a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html#iter">iter</a>, <a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html#jobConf">jobConf</a>, <a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html#key">key</a>, <a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html#reader">reader</a></code></li> |
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| <code><a href="../../../../../../org/apache/hawq/pxf/api/utilities/Plugin.html#inputData">inputData</a></code></li> |
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| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/AvroFileAccessor.html#AvroFileAccessor-org.apache.hawq.pxf.api.utilities.InputData-">AvroFileAccessor</a></span>(<a href="../../../../../../org/apache/hawq/pxf/api/utilities/InputData.html" title="class in org.apache.hawq.pxf.api.utilities">InputData</a> input)</code> |
| <div class="block">Constructs a AvroFileAccessor that creates the job configuration and |
| accesses the avro file to fetch the avro schema</div> |
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| <td class="colFirst"><code>protected java.lang.Object</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/AvroFileAccessor.html#getReader-org.apache.hadoop.mapred.JobConf-org.apache.hadoop.mapred.InputSplit-">getReader</a></span>(org.apache.hadoop.mapred.JobConf jobConf, |
| org.apache.hadoop.mapred.InputSplit split)</code> |
| <div class="block">Specialized accessors will override this method and implement their own |
| recordReader.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/hawq/pxf/api/OneRow.html" title="class in org.apache.hawq.pxf.api">OneRow</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/AvroFileAccessor.html#readNextObject--">readNextObject</a></span>()</code> |
| <div class="block">readNextObject |
| The AVRO accessor is currently the only specialized accessor that |
| overrides this method.</div> |
| </td> |
| </tr> |
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| <h3>Methods inherited from class org.apache.hawq.pxf.plugins.hdfs.<a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html" title="class in org.apache.hawq.pxf.plugins.hdfs">HdfsSplittableDataAccessor</a></h3> |
| <code><a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html#closeForRead--">closeForRead</a>, <a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html#getNextSplit--">getNextSplit</a>, <a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html#isThreadSafe--">isThreadSafe</a>, <a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html#openForRead--">openForRead</a></code></li> |
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| <code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li> |
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| <h3>Constructor Detail</h3> |
| <a name="AvroFileAccessor-org.apache.hawq.pxf.api.utilities.InputData-"> |
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| <h4>AvroFileAccessor</h4> |
| <pre>public AvroFileAccessor(<a href="../../../../../../org/apache/hawq/pxf/api/utilities/InputData.html" title="class in org.apache.hawq.pxf.api.utilities">InputData</a> input) |
| throws java.lang.Exception</pre> |
| <div class="block">Constructs a AvroFileAccessor that creates the job configuration and |
| accesses the avro file to fetch the avro schema</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>input</code> - all input parameters coming from the client</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>java.lang.Exception</code> - if getting the avro schema fails</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
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| <h3>Method Detail</h3> |
| <a name="getReader-org.apache.hadoop.mapred.JobConf-org.apache.hadoop.mapred.InputSplit-"> |
| <!-- --> |
| </a> |
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| <h4>getReader</h4> |
| <pre>protected java.lang.Object getReader(org.apache.hadoop.mapred.JobConf jobConf, |
| org.apache.hadoop.mapred.InputSplit split) |
| throws java.io.IOException</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html#getReader-org.apache.hadoop.mapred.JobConf-org.apache.hadoop.mapred.InputSplit-">HdfsSplittableDataAccessor</a></code></span></div> |
| <div class="block">Specialized accessors will override this method and implement their own |
| recordReader. For example, a plain delimited text accessor may want to |
| return a LineRecordReader.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html#getReader-org.apache.hadoop.mapred.JobConf-org.apache.hadoop.mapred.InputSplit-">getReader</a></code> in class <code><a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html" title="class in org.apache.hawq.pxf.plugins.hdfs">HdfsSplittableDataAccessor</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>jobConf</code> - the hadoop jobconf to use for the selected InputFormat</dd> |
| <dd><code>split</code> - the input split to be read by the accessor</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>a recordreader to be used for reading the data records of the |
| split</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>java.io.IOException</code> - if recordreader could not be created</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="readNextObject--"> |
| <!-- --> |
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| <h4>readNextObject</h4> |
| <pre>public <a href="../../../../../../org/apache/hawq/pxf/api/OneRow.html" title="class in org.apache.hawq.pxf.api">OneRow</a> readNextObject() |
| throws java.io.IOException</pre> |
| <div class="block">readNextObject |
| The AVRO accessor is currently the only specialized accessor that |
| overrides this method. This happens, because the special |
| AvroRecordReader.next() semantics (use of the AvroWrapper), so it |
| cannot use the RecordReader's default implementation in |
| SplittableFileAccessor</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hawq/pxf/api/ReadAccessor.html#readNextObject--">readNextObject</a></code> in interface <code><a href="../../../../../../org/apache/hawq/pxf/api/ReadAccessor.html" title="interface in org.apache.hawq.pxf.api">ReadAccessor</a></code></dd> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html#readNextObject--">readNextObject</a></code> in class <code><a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html" title="class in org.apache.hawq.pxf.plugins.hdfs">HdfsSplittableDataAccessor</a></code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the object which was read</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>java.io.IOException</code></dd> |
| </dl> |
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