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| <div class="subTitle">org.apache.hadoop.mapreduce.lib.input</div> |
| <h2 title="Class KeyValueTextInputFormat" class="title">Class KeyValueTextInputFormat</h2> |
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| <ul class="inheritance"> |
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| <li> |
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| <li><a href="../../../../../../org/apache/hadoop/mapreduce/InputFormat.html" title="class in org.apache.hadoop.mapreduce">org.apache.hadoop.mapreduce.InputFormat</a><K,V></li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html" title="class in org.apache.hadoop.mapreduce.lib.input">org.apache.hadoop.mapreduce.lib.input.FileInputFormat</a><<a href="../../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</a>,<a href="../../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</a>></li> |
| <li> |
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| <li>org.apache.hadoop.mapreduce.lib.input.KeyValueTextInputFormat</li> |
| </ul> |
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| <pre>@InterfaceAudience.Public |
| @InterfaceStability.Stable |
| public class <span class="typeNameLabel">KeyValueTextInputFormat</span> |
| extends <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html" title="class in org.apache.hadoop.mapreduce.lib.input">FileInputFormat</a><<a href="../../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</a>,<a href="../../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</a>></pre> |
| <div class="block">An <a href="../../../../../../org/apache/hadoop/mapreduce/InputFormat.html" title="class in org.apache.hadoop.mapreduce"><code>InputFormat</code></a> for plain text files. Files are broken into lines. |
| Either line feed or carriage-return are used to signal end of line. |
| Each line is divided into key and value parts by a separator byte. If no |
| such a byte exists, the key will be the entire line and value will be empty. |
| The separator byte can be specified in config file under the attribute name |
| mapreduce.input.keyvaluelinerecordreader.key.value.separator. The default |
| is the tab character ('\t').</div> |
| </li> |
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| <!-- --> |
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| <h3>Fields inherited from class org.apache.hadoop.mapreduce.lib.input.<a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html" title="class in org.apache.hadoop.mapreduce.lib.input">FileInputFormat</a></h3> |
| <code><a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#DEFAULT_LIST_STATUS_NUM_THREADS">DEFAULT_LIST_STATUS_NUM_THREADS</a>, <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#INPUT_DIR">INPUT_DIR</a>, <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#INPUT_DIR_NONRECURSIVE_IGNORE_SUBDIRS">INPUT_DIR_NONRECURSIVE_IGNORE_SUBDIRS</a>, <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#INPUT_DIR_RECURSIVE">INPUT_DIR_RECURSIVE</a>, <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#LIST_STATUS_NUM_THREADS">LIST_STATUS_NUM_THREADS</a>, <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#NUM_INPUT_FILES">NUM_INPUT_FILES</a>, <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#PATHFILTER_CLASS">PATHFILTER_CLASS</a>, <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#SPLIT_MAXSIZE">SPLIT_MAXSIZE</a>, <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#SPLIT_MINSIZE">SPLIT_MINSIZE</a></code></li> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/KeyValueTextInputFormat.html#KeyValueTextInputFormat--">KeyValueTextInputFormat</a></span>()</code> </td> |
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| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/mapreduce/RecordReader.html" title="class in org.apache.hadoop.mapreduce">RecordReader</a><<a href="../../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</a>,<a href="../../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/KeyValueTextInputFormat.html#createRecordReader-org.apache.hadoop.mapreduce.InputSplit-org.apache.hadoop.mapreduce.TaskAttemptContext-">createRecordReader</a></span>(<a href="../../../../../../org/apache/hadoop/mapreduce/InputSplit.html" title="class in org.apache.hadoop.mapreduce">InputSplit</a> genericSplit, |
| <a href="../../../../../../org/apache/hadoop/mapreduce/TaskAttemptContext.html" title="interface in org.apache.hadoop.mapreduce">TaskAttemptContext</a> context)</code> |
| <div class="block">Create a record reader for a given split.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>protected boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/KeyValueTextInputFormat.html#isSplitable-org.apache.hadoop.mapreduce.JobContext-org.apache.hadoop.fs.Path-">isSplitable</a></span>(<a href="../../../../../../org/apache/hadoop/mapreduce/JobContext.html" title="interface in org.apache.hadoop.mapreduce">JobContext</a> context, |
| <a href="../../../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a> file)</code> |
| <div class="block">Is the given filename splittable? Usually, true, but if the file is |
| stream compressed, it will not be.</div> |
| </td> |
| </tr> |
| </table> |
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| <li class="blockList"><a name="methods.inherited.from.class.org.apache.hadoop.mapreduce.lib.input.FileInputFormat"> |
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| <h3>Methods inherited from class org.apache.hadoop.mapreduce.lib.input.<a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html" title="class in org.apache.hadoop.mapreduce.lib.input">FileInputFormat</a></h3> |
| <code><a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#addInputPath-org.apache.hadoop.mapreduce.Job-org.apache.hadoop.fs.Path-">addInputPath</a>, <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#addInputPathRecursively-java.util.List-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-org.apache.hadoop.fs.PathFilter-">addInputPathRecursively</a>, <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#addInputPaths-org.apache.hadoop.mapreduce.Job-java.lang.String-">addInputPaths</a>, <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#computeSplitSize-long-long-long-">computeSplitSize</a>, <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#getBlockIndex-org.apache.hadoop.fs.BlockLocation:A-long-">getBlockIndex</a>, <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#getFormatMinSplitSize--">getFormatMinSplitSize</a>, <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#getInputDirRecursive-org.apache.hadoop.mapreduce.JobContext-">getInputDirRecursive</a>, <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#getInputPathFilter-org.apache.hadoop.mapreduce.JobContext-">getInputPathFilter</a>, <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#getInputPaths-org.apache.hadoop.mapreduce.JobContext-">getInputPaths</a>, <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#getMaxSplitSize-org.apache.hadoop.mapreduce.JobContext-">getMaxSplitSize</a>, <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#getMinSplitSize-org.apache.hadoop.mapreduce.JobContext-">getMinSplitSize</a>, <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#getSplits-org.apache.hadoop.mapreduce.JobContext-">getSplits</a>, <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#listStatus-org.apache.hadoop.mapreduce.JobContext-">listStatus</a>, <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#makeSplit-org.apache.hadoop.fs.Path-long-long-java.lang.String:A-">makeSplit</a>, <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#makeSplit-org.apache.hadoop.fs.Path-long-long-java.lang.String:A-java.lang.String:A-">makeSplit</a>, <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#setInputDirRecursive-org.apache.hadoop.mapreduce.Job-boolean-">setInputDirRecursive</a>, <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#setInputPathFilter-org.apache.hadoop.mapreduce.Job-java.lang.Class-">setInputPathFilter</a>, <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#setInputPaths-org.apache.hadoop.mapreduce.Job-org.apache.hadoop.fs.Path...-">setInputPaths</a>, <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#setInputPaths-org.apache.hadoop.mapreduce.Job-java.lang.String-">setInputPaths</a>, <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#setMaxInputSplitSize-org.apache.hadoop.mapreduce.Job-long-">setMaxInputSplitSize</a>, <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#setMinInputSplitSize-org.apache.hadoop.mapreduce.Job-long-">setMinInputSplitSize</a>, <a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#shrinkStatus-org.apache.hadoop.fs.FileStatus-">shrinkStatus</a></code></li> |
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| <h3>Constructor Detail</h3> |
| <a name="KeyValueTextInputFormat--"> |
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| <h4>KeyValueTextInputFormat</h4> |
| <pre>public KeyValueTextInputFormat()</pre> |
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| <a name="isSplitable-org.apache.hadoop.mapreduce.JobContext-org.apache.hadoop.fs.Path-"> |
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| <h4>isSplitable</h4> |
| <pre>protected boolean isSplitable(<a href="../../../../../../org/apache/hadoop/mapreduce/JobContext.html" title="interface in org.apache.hadoop.mapreduce">JobContext</a> context, |
| <a href="../../../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a> file)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#isSplitable-org.apache.hadoop.mapreduce.JobContext-org.apache.hadoop.fs.Path-">FileInputFormat</a></code></span></div> |
| <div class="block">Is the given filename splittable? Usually, true, but if the file is |
| stream compressed, it will not be. |
| |
| The default implementation in <code>FileInputFormat</code> always returns |
| true. Implementations that may deal with non-splittable files <i>must</i> |
| override this method. |
| |
| <code>FileInputFormat</code> implementations can override this and return |
| <code>false</code> to ensure that individual input files are never split-up |
| so that <a href="../../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce"><code>Mapper</code></a>s process entire files.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html#isSplitable-org.apache.hadoop.mapreduce.JobContext-org.apache.hadoop.fs.Path-">isSplitable</a></code> in class <code><a href="../../../../../../org/apache/hadoop/mapreduce/lib/input/FileInputFormat.html" title="class in org.apache.hadoop.mapreduce.lib.input">FileInputFormat</a><<a href="../../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</a>,<a href="../../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</a>></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>context</code> - the job context</dd> |
| <dd><code>file</code> - the file name to check</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>is this file splitable?</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="createRecordReader-org.apache.hadoop.mapreduce.InputSplit-org.apache.hadoop.mapreduce.TaskAttemptContext-"> |
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| </a> |
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| <li class="blockList"> |
| <h4>createRecordReader</h4> |
| <pre>public <a href="../../../../../../org/apache/hadoop/mapreduce/RecordReader.html" title="class in org.apache.hadoop.mapreduce">RecordReader</a><<a href="../../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</a>,<a href="../../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</a>> createRecordReader(<a href="../../../../../../org/apache/hadoop/mapreduce/InputSplit.html" title="class in org.apache.hadoop.mapreduce">InputSplit</a> genericSplit, |
| <a href="../../../../../../org/apache/hadoop/mapreduce/TaskAttemptContext.html" title="interface in org.apache.hadoop.mapreduce">TaskAttemptContext</a> context) |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="../../../../../../org/apache/hadoop/mapreduce/InputFormat.html#createRecordReader-org.apache.hadoop.mapreduce.InputSplit-org.apache.hadoop.mapreduce.TaskAttemptContext-">InputFormat</a></code></span></div> |
| <div class="block">Create a record reader for a given split. The framework will call |
| <a href="../../../../../../org/apache/hadoop/mapreduce/RecordReader.html#initialize-org.apache.hadoop.mapreduce.InputSplit-org.apache.hadoop.mapreduce.TaskAttemptContext-"><code>RecordReader.initialize(InputSplit, TaskAttemptContext)</code></a> before |
| the split is used.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/mapreduce/InputFormat.html#createRecordReader-org.apache.hadoop.mapreduce.InputSplit-org.apache.hadoop.mapreduce.TaskAttemptContext-">createRecordReader</a></code> in class <code><a href="../../../../../../org/apache/hadoop/mapreduce/InputFormat.html" title="class in org.apache.hadoop.mapreduce">InputFormat</a><<a href="../../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</a>,<a href="../../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</a>></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>genericSplit</code> - the split to be read</dd> |
| <dd><code>context</code> - the information about the task</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>a new record reader</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
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