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<h2 title="Class IOUtilFunctions" class="title">Class IOUtilFunctions</h2>
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<pre>public class <span class="typeNameLabel">IOUtilFunctions</span>
extends <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a></pre>
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<td class="colFirst"><code>static class&nbsp;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="IOUtilFunctions.CountRowsTask.html" title="class in org.apache.sysds.runtime.io">IOUtilFunctions.CountRowsTask</a></span></code></th>
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<td class="colFirst"><code>static char</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#CSV_QUOTE_CHAR">CSV_QUOTE_CHAR</a></span></code></th>
<td class="colLast">&nbsp;</td>
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<tr class="rowColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#EMPTY_TEXT_LINE">EMPTY_TEXT_LINE</a></span></code></th>
<td class="colLast">&nbsp;</td>
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<tr class="altColor">
<td class="colFirst"><code>static org.apache.hadoop.fs.PathFilter</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#hiddenFileFilter">hiddenFileFilter</a></span></code></th>
<td class="colLast">&nbsp;</td>
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<td class="colFirst"><code>static <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#LIBSVM_DELIM">LIBSVM_DELIM</a></span></code></th>
<td class="colLast">&nbsp;</td>
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<tr class="altColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#LIBSVM_INDEX_DELIM">LIBSVM_INDEX_DELIM</a></span></code></th>
<td class="colLast">&nbsp;</td>
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E()">IOUtilFunctions</a></span>()</code></th>
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<td class="colFirst"><code>static int</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#baToInt(byte%5B%5D,int)">baToInt</a></span>&#8203;(byte[]&nbsp;ba,
int&nbsp;off)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>static long</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#baToLong(byte%5B%5D,int)">baToLong</a></span>&#8203;(byte[]&nbsp;ba,
int&nbsp;off)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>static int</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#baToShort(byte%5B%5D,int)">baToShort</a></span>&#8203;(byte[]&nbsp;ba,
int&nbsp;off)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>static void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#checkAndRaiseErrorCSVEmptyField(java.lang.String,boolean,boolean)">checkAndRaiseErrorCSVEmptyField</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;row,
boolean&nbsp;fill,
boolean&nbsp;emptyFound)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>static void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#checkAndRaiseErrorCSVNumColumns(java.lang.String,java.lang.String,java.lang.String%5B%5D,long)">checkAndRaiseErrorCSVNumColumns</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;fname,
<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;line,
<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>[]&nbsp;parts,
long&nbsp;ncol)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>static void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#closeSilently(java.io.Closeable)">closeSilently</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/Closeable.html?is-external=true" title="class or interface in java.io" class="externalLink">Closeable</a>&nbsp;io)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>static void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#closeSilently(org.apache.hadoop.mapred.RecordReader)">closeSilently</a></span>&#8203;(org.apache.hadoop.mapred.RecordReader&lt;?,&#8203;?&gt;&nbsp;rr)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>static int</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#countNnz(java.lang.String%5B%5D)">countNnz</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>[]&nbsp;cols)</code></th>
<td class="colLast">
<div class="block">Returns the number of non-zero entries but avoids the expensive
string to double parsing.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>static int</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#countNnz(java.lang.String%5B%5D,int,int)">countNnz</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>[]&nbsp;cols,
int&nbsp;pos,
int&nbsp;len)</code></th>
<td class="colLast">
<div class="block">Returns the number of non-zero entries but avoids the expensive
string to double parsing.</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>static int</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#countNumColumnsCSV(org.apache.hadoop.mapred.InputSplit%5B%5D,org.apache.hadoop.mapred.InputFormat,org.apache.hadoop.mapred.JobConf,java.lang.String)">countNumColumnsCSV</a></span>&#8203;(org.apache.hadoop.mapred.InputSplit[]&nbsp;splits,
org.apache.hadoop.mapred.InputFormat&nbsp;informat,
org.apache.hadoop.mapred.JobConf&nbsp;job,
<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;delim)</code></th>
<td class="colLast">
<div class="block">Counts the number of columns in a given collection of csv file splits.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>static int</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#countTokensCSV(java.lang.String,java.lang.String)">countTokensCSV</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;str,
<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;delim)</code></th>
<td class="colLast">
<div class="block">Counts the number of tokens defined by the given delimiter, respecting
the rules for quotes and escapes defined in RFC4180,
with robustness for various special cases.</div>
</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>static void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#deleteCrcFilesFromLocalFileSystem(org.apache.hadoop.fs.FileSystem,org.apache.hadoop.fs.Path)">deleteCrcFilesFromLocalFileSystem</a></span>&#8203;(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;path)</code></th>
<td class="colLast">
<div class="block">Delete the CRC files from the local file system associated with a
particular file and its metadata file.</div>
</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>static &lt;T&gt;&nbsp;T</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#get(java.util.concurrent.Future)">get</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/concurrent/Future.html?is-external=true" title="class or interface in java.util.concurrent" class="externalLink">Future</a>&lt;T&gt;&nbsp;in)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code>static byte[]</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getBytes(java.nio.ByteBuffer)">getBytes</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio" class="externalLink">ByteBuffer</a>&nbsp;buff)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code>static org.apache.hadoop.fs.FileSystem</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getFileSystem(java.lang.String)">getFileSystem</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;fname)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i15" class="rowColor">
<td class="colFirst"><code>static org.apache.hadoop.fs.FileSystem</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getFileSystem(org.apache.hadoop.conf.Configuration)">getFileSystem</a></span>&#8203;(org.apache.hadoop.conf.Configuration&nbsp;conf)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i16" class="altColor">
<td class="colFirst"><code>static org.apache.hadoop.fs.FileSystem</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getFileSystem(org.apache.hadoop.fs.Path)">getFileSystem</a></span>&#8203;(org.apache.hadoop.fs.Path&nbsp;fname)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i17" class="rowColor">
<td class="colFirst"><code>static org.apache.hadoop.fs.FileSystem</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getFileSystem(org.apache.hadoop.fs.Path,org.apache.hadoop.conf.Configuration)">getFileSystem</a></span>&#8203;(org.apache.hadoop.fs.Path&nbsp;fname,
org.apache.hadoop.conf.Configuration&nbsp;conf)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i18" class="altColor">
<td class="colFirst"><code>static org.apache.hadoop.fs.Path[]</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getMetadataFilePaths(org.apache.hadoop.fs.FileSystem,org.apache.hadoop.fs.Path)">getMetadataFilePaths</a></span>&#8203;(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;file)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i19" class="rowColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getPartFileName(int)">getPartFileName</a></span>&#8203;(int&nbsp;pos)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i20" class="altColor">
<td class="colFirst"><code>static org.apache.hadoop.fs.Path[]</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getSequenceFilePaths(org.apache.hadoop.fs.FileSystem,org.apache.hadoop.fs.Path)">getSequenceFilePaths</a></span>&#8203;(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;file)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i21" class="rowColor">
<td class="colFirst"><code>static org.apache.hadoop.io.SequenceFile.Writer</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getSeqWriter(org.apache.hadoop.fs.Path,org.apache.hadoop.conf.Configuration,int)">getSeqWriter</a></span>&#8203;(org.apache.hadoop.fs.Path&nbsp;path,
org.apache.hadoop.conf.Configuration&nbsp;job,
int&nbsp;replication)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i22" class="altColor">
<td class="colFirst"><code>static org.apache.hadoop.io.SequenceFile.Writer</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getSeqWriterCell(org.apache.hadoop.fs.Path,org.apache.hadoop.conf.Configuration,int)">getSeqWriterCell</a></span>&#8203;(org.apache.hadoop.fs.Path&nbsp;path,
org.apache.hadoop.conf.Configuration&nbsp;job,
int&nbsp;replication)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i23" class="rowColor">
<td class="colFirst"><code>static org.apache.hadoop.io.SequenceFile.Writer</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getSeqWriterFrame(org.apache.hadoop.fs.Path,org.apache.hadoop.conf.Configuration,int)">getSeqWriterFrame</a></span>&#8203;(org.apache.hadoop.fs.Path&nbsp;path,
org.apache.hadoop.conf.Configuration&nbsp;job,
int&nbsp;replication)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i24" class="altColor">
<td class="colFirst"><code>static org.apache.hadoop.io.SequenceFile.Writer</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getSeqWriterTensor(org.apache.hadoop.fs.Path,org.apache.hadoop.conf.Configuration,int)">getSeqWriterTensor</a></span>&#8203;(org.apache.hadoop.fs.Path&nbsp;path,
org.apache.hadoop.conf.Configuration&nbsp;job,
int&nbsp;replication)</code></th>
<td class="colLast">&nbsp;</td>
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<tr id="i25" class="rowColor">
<td class="colFirst"><code>static int</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getUTFSize(java.lang.String)">getUTFSize</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;value)</code></th>
<td class="colLast">
<div class="block">Returns the serialized size in bytes of the given string value,
following the modified UTF-8 specification as used by Java's
DataInput/DataOutput.</div>
</td>
</tr>
<tr id="i26" class="altColor">
<td class="colFirst"><code>static void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#intToBa(int,byte%5B%5D,int)">intToBa</a></span>&#8203;(int&nbsp;val,
byte[]&nbsp;ba,
int&nbsp;off)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i27" class="rowColor">
<td class="colFirst"><code>static boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isObjectStoreFileScheme(org.apache.hadoop.fs.Path)">isObjectStoreFileScheme</a></span>&#8203;(org.apache.hadoop.fs.Path&nbsp;path)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i28" class="altColor">
<td class="colFirst"><code>static boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isSameFileScheme(org.apache.hadoop.fs.Path,org.apache.hadoop.fs.Path)">isSameFileScheme</a></span>&#8203;(org.apache.hadoop.fs.Path&nbsp;path1,
org.apache.hadoop.fs.Path&nbsp;path2)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i29" class="rowColor">
<td class="colFirst"><code>static void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#longToBa(long,byte%5B%5D,int)">longToBa</a></span>&#8203;(long&nbsp;val,
byte[]&nbsp;ba,
int&nbsp;off)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i30" class="altColor">
<td class="colFirst"><code>static <a href="FileFormatPropertiesMM.html" title="class in org.apache.sysds.runtime.io">FileFormatPropertiesMM</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#readAndParseMatrixMarketHeader(java.lang.String)">readAndParseMatrixMarketHeader</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;filename)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i31" class="rowColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>[]</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#readMatrixMarketHeader(java.lang.String)">readMatrixMarketHeader</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;filename)</code></th>
<td class="colLast">&nbsp;</td>
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<tr id="i32" class="altColor">
<td class="colFirst"><code>static void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#shortToBa(int,byte%5B%5D,int)">shortToBa</a></span>&#8203;(int&nbsp;val,
byte[]&nbsp;ba,
int&nbsp;off)</code></th>
<td class="colLast">&nbsp;</td>
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<tr id="i33" class="rowColor">
<td class="colFirst"><code>static org.apache.hadoop.mapred.InputSplit[]</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#sortInputSplits(org.apache.hadoop.mapred.InputSplit%5B%5D)">sortInputSplits</a></span>&#8203;(org.apache.hadoop.mapred.InputSplit[]&nbsp;splits)</code></th>
<td class="colLast">&nbsp;</td>
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<tr id="i34" class="altColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>[]</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#split(java.lang.String,java.lang.String)">split</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;str,
<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;delim)</code></th>
<td class="colLast">
<div class="block">Splits a string by a specified delimiter into all tokens, including empty.</div>
</td>
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<tr id="i35" class="rowColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>[]</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#splitByFirst(java.lang.String,java.lang.String)">splitByFirst</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;str,
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<tr id="i36" class="altColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>[]</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#splitCSV(java.lang.String,java.lang.String)">splitCSV</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;str,
<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;delim)</code></th>
<td class="colLast">
<div class="block">Splits a string by a specified delimiter into all tokens, including empty
while respecting the rules for quotes and escapes defined in RFC4180,
with robustness for various special cases.</div>
</td>
</tr>
<tr id="i37" class="rowColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>[]</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#splitCSV(java.lang.String,java.lang.String,java.lang.String%5B%5D)">splitCSV</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;str,
<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;delim,
<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>[]&nbsp;cache)</code></th>
<td class="colLast">
<div class="block">Splits a string by a specified delimiter into all tokens, including empty
while respecting the rules for quotes and escapes defined in RFC4180,
with robustness for various special cases.</div>
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<tr id="i38" class="altColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>[]</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#splitCSV(java.lang.String,java.lang.String,java.lang.String%5B%5D,java.util.Set)">splitCSV</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;str,
<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;delim,
<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>[]&nbsp;tokens,
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<td class="colLast">
<div class="block">Splits a string by a specified delimiter into all tokens, including empty
while respecting the rules for quotes and escapes defined in RFC4180,
with robustness for various special cases.</div>
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<td class="colFirst"><code>static <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/InputStream.html?is-external=true" title="class or interface in java.io" class="externalLink">InputStream</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#toInputStream(java.lang.String)">toInputStream</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;input)</code></th>
<td class="colLast">&nbsp;</td>
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<tr id="i40" class="altColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#toString(java.io.InputStream)">toString</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/InputStream.html?is-external=true" title="class or interface in java.io" class="externalLink">InputStream</a>&nbsp;input)</code></th>
<td class="colLast">&nbsp;</td>
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<tr id="i41" class="rowColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#trim(java.lang.String)">trim</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;str)</code></th>
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boolean&nbsp;fill,
boolean&nbsp;emptyFound)
throws <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/IOException.html?is-external=true" title="class or interface in java.io" class="externalLink">IOException</a></pre>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/IOException.html?is-external=true" title="class or interface in java.io" class="externalLink">IOException</a></code></dd>
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<pre class="methodSignature">public static&nbsp;void&nbsp;checkAndRaiseErrorCSVNumColumns&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;fname,
<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;line,
<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>[]&nbsp;parts,
long&nbsp;ncol)
throws <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/IOException.html?is-external=true" title="class or interface in java.io" class="externalLink">IOException</a></pre>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/IOException.html?is-external=true" title="class or interface in java.io" class="externalLink">IOException</a></code></dd>
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<pre class="methodSignature">public static&nbsp;<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>[]&nbsp;split&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;str,
<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;delim)</pre>
<div class="block">Splits a string by a specified delimiter into all tokens, including empty.
NOTE: This method is meant as a faster drop-in replacement of the regular
string split.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>str</code> - string to split</dd>
<dd><code>delim</code> - delimiter</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>string array</dd>
</dl>
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<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;delim)</pre>
<div class="block">Splits a string by a specified delimiter into all tokens, including empty
while respecting the rules for quotes and escapes defined in RFC4180,
with robustness for various special cases.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>str</code> - string to split</dd>
<dd><code>delim</code> - delimiter</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>string array of tokens</dd>
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<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;delim,
<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>[]&nbsp;cache)</pre>
<div class="block">Splits a string by a specified delimiter into all tokens, including empty
while respecting the rules for quotes and escapes defined in RFC4180,
with robustness for various special cases.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>str</code> - string to split</dd>
<dd><code>delim</code> - delimiter</dd>
<dd><code>cache</code> - cachedReturnArray</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>string array of tokens</dd>
</dl>
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<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;delim,
<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>[]&nbsp;tokens,
<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a>&lt;<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&gt;&nbsp;naStrings)</pre>
<div class="block">Splits a string by a specified delimiter into all tokens, including empty
while respecting the rules for quotes and escapes defined in RFC4180,
with robustness for various special cases.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>str</code> - string to split</dd>
<dd><code>delim</code> - delimiter</dd>
<dd><code>tokens</code> - array for tokens, length needs to match the number of tokens</dd>
<dd><code>naStrings</code> - the strings to map to null value.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>string array of tokens</dd>
</dl>
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</ul>
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<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;delim)</pre>
<div class="block">Counts the number of tokens defined by the given delimiter, respecting
the rules for quotes and escapes defined in RFC4180,
with robustness for various special cases.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>str</code> - string to split</dd>
<dd><code>delim</code> - delimiter</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>number of tokens split by the given delimiter</dd>
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<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;delim)</pre>
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throws <a href="../DMLRuntimeException.html" title="class in org.apache.sysds.runtime">DMLRuntimeException</a></pre>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="../DMLRuntimeException.html" title="class in org.apache.sysds.runtime">DMLRuntimeException</a></code></dd>
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<pre class="methodSignature">public static&nbsp;<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>[]&nbsp;readMatrixMarketHeader&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;filename)</pre>
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<pre class="methodSignature">public static&nbsp;int&nbsp;countNnz&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>[]&nbsp;cols)</pre>
<div class="block">Returns the number of non-zero entries but avoids the expensive
string to double parsing. This function is guaranteed to never
underestimate.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>cols</code> - string array</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>number of non-zeros</dd>
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<pre class="methodSignature">public static&nbsp;int&nbsp;countNnz&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>[]&nbsp;cols,
int&nbsp;pos,
int&nbsp;len)</pre>
<div class="block">Returns the number of non-zero entries but avoids the expensive
string to double parsing. This function is guaranteed to never
underestimate.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>cols</code> - string array</dd>
<dd><code>pos</code> - starting array index</dd>
<dd><code>len</code> - ending array index</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>number of non-zeros</dd>
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<div class="block">Returns the serialized size in bytes of the given string value,
following the modified UTF-8 specification as used by Java's
DataInput/DataOutput.
see java docs: docs/api/java/io/DataInput.html#modified-utf-8</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>value</code> - string value</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>string size for modified UTF-8 specification</dd>
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<pre class="methodSignature">public static&nbsp;<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/InputStream.html?is-external=true" title="class or interface in java.io" class="externalLink">InputStream</a>&nbsp;toInputStream&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;input)</pre>
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<pre class="methodSignature">public static&nbsp;<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;toString&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/InputStream.html?is-external=true" title="class or interface in java.io" class="externalLink">InputStream</a>&nbsp;input)
throws <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/IOException.html?is-external=true" title="class or interface in java.io" class="externalLink">IOException</a></pre>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/IOException.html?is-external=true" title="class or interface in java.io" class="externalLink">IOException</a></code></dd>
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org.apache.hadoop.mapred.JobConf&nbsp;job,
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<div class="block">Counts the number of columns in a given collection of csv file splits. This primitive aborts
if a row with more than 0 columns is found and hence is robust against empty file splits etc.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>splits</code> - input splits</dd>
<dd><code>informat</code> - input format</dd>
<dd><code>job</code> - job configruation</dd>
<dd><code>delim</code> - delimiter</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the number of columns in the collection of csv file splits</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/IOException.html?is-external=true" title="class or interface in java.io" class="externalLink">IOException</a></code> - if IOException occurs</dd>
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<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/IOException.html?is-external=true" title="class or interface in java.io" class="externalLink">IOException</a></code></dd>
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<pre class="methodSignature">public static&nbsp;org.apache.hadoop.fs.Path[]&nbsp;getMetadataFilePaths&#8203;(org.apache.hadoop.fs.FileSystem&nbsp;fs,
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<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/IOException.html?is-external=true" title="class or interface in java.io" class="externalLink">IOException</a></code></dd>
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<div class="block">Delete the CRC files from the local file system associated with a
particular file and its metadata file.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>fs</code> - the file system</dd>
<dd><code>path</code> - the path to a file</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/IOException.html?is-external=true" title="class or interface in java.io" class="externalLink">IOException</a></code> - thrown if error occurred attempting to delete crc files</dd>
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<pre class="methodSignature">public static&nbsp;void&nbsp;longToBa&#8203;(long&nbsp;val,
byte[]&nbsp;ba,
int&nbsp;off)</pre>
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<pre class="methodSignature">public static&nbsp;byte[]&nbsp;getBytes&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio" class="externalLink">ByteBuffer</a>&nbsp;buff)</pre>
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<h4>get</h4>
<pre class="methodSignature">public static&nbsp;&lt;T&gt;&nbsp;T&nbsp;get&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/concurrent/Future.html?is-external=true" title="class or interface in java.util.concurrent" class="externalLink">Future</a>&lt;T&gt;&nbsp;in)</pre>
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<h4>getSeqWriter</h4>
<pre class="methodSignature">public static&nbsp;org.apache.hadoop.io.SequenceFile.Writer&nbsp;getSeqWriter&#8203;(org.apache.hadoop.fs.Path&nbsp;path,
org.apache.hadoop.conf.Configuration&nbsp;job,
int&nbsp;replication)
throws <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/IOException.html?is-external=true" title="class or interface in java.io" class="externalLink">IOException</a></pre>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/IOException.html?is-external=true" title="class or interface in java.io" class="externalLink">IOException</a></code></dd>
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<pre class="methodSignature">public static&nbsp;org.apache.hadoop.io.SequenceFile.Writer&nbsp;getSeqWriterFrame&#8203;(org.apache.hadoop.fs.Path&nbsp;path,
org.apache.hadoop.conf.Configuration&nbsp;job,
int&nbsp;replication)
throws <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/IOException.html?is-external=true" title="class or interface in java.io" class="externalLink">IOException</a></pre>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/IOException.html?is-external=true" title="class or interface in java.io" class="externalLink">IOException</a></code></dd>
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<pre class="methodSignature">public static&nbsp;org.apache.hadoop.io.SequenceFile.Writer&nbsp;getSeqWriterTensor&#8203;(org.apache.hadoop.fs.Path&nbsp;path,
org.apache.hadoop.conf.Configuration&nbsp;job,
int&nbsp;replication)
throws <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/IOException.html?is-external=true" title="class or interface in java.io" class="externalLink">IOException</a></pre>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/IOException.html?is-external=true" title="class or interface in java.io" class="externalLink">IOException</a></code></dd>
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<pre class="methodSignature">public static&nbsp;org.apache.hadoop.io.SequenceFile.Writer&nbsp;getSeqWriterCell&#8203;(org.apache.hadoop.fs.Path&nbsp;path,
org.apache.hadoop.conf.Configuration&nbsp;job,
int&nbsp;replication)
throws <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/IOException.html?is-external=true" title="class or interface in java.io" class="externalLink">IOException</a></pre>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/IOException.html?is-external=true" title="class or interface in java.io" class="externalLink">IOException</a></code></dd>
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