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<div class="subTitle">org.apache.sysds.runtime.compress.colgroup</div>
<h2 title="Class ColGroupOffset" class="title">Class ColGroupOffset</h2>
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<ul class="inheritance">
<li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li>
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<ul class="inheritance">
<li><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">org.apache.sysds.runtime.compress.colgroup.ColGroup</a></li>
<li>
<ul class="inheritance">
<li><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html" title="class in org.apache.sysds.runtime.compress.colgroup">org.apache.sysds.runtime.compress.colgroup.ColGroupValue</a></li>
<li>
<ul class="inheritance">
<li>org.apache.sysds.runtime.compress.colgroup.ColGroupOffset</li>
</ul>
</li>
</ul>
</li>
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<dd><a href="https://docs.oracle.com/javase/8/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a></dd>
</dl>
<dl>
<dt>Direct Known Subclasses:</dt>
<dd><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOLE.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroupOLE</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupRLE.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroupRLE</a></dd>
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<pre>public abstract class <span class="typeNameLabel">ColGroupOffset</span>
extends <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroupValue</a></pre>
<div class="block">Base class for column groups encoded with various types of bitmap encoding.
NOTES: * OLE: separate storage segment length and bitmaps led to a 30% improvement but not applied because more
difficult to support both data layouts at the same time (distributed/local as well as w/ and w/o low-level opt)</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../../serialized-form.html#org.apache.sysds.runtime.compress.colgroup.ColGroupOffset">Serialized Form</a></dd>
</dl>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Class and Description</th>
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<tr class="altColor">
<td class="colFirst"><code>protected class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.OffsetRowIterator.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroupOffset.OffsetRowIterator</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.OffsetValueIterator.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroupOffset.OffsetValueIterator</a></span></code>&nbsp;</td>
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<tr class="altColor">
<td class="colFirst"><code>protected class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.ZeroValueIterator.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroupOffset.ZeroValueIterator</a></span></code>&nbsp;</td>
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<h3>Nested classes/interfaces inherited from class&nbsp;org.apache.sysds.runtime.compress.colgroup.<a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup</a></h3>
<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.ColGroupRowIterator.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup.ColGroupRowIterator</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.ColGroupType.html" title="enum in org.apache.sysds.runtime.compress.colgroup">ColGroup.ColGroupType</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.CompressionType.html" title="enum in org.apache.sysds.runtime.compress.colgroup">ColGroup.CompressionType</a></code></li>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<td class="colFirst"><code>protected char[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.html#Z:Z_data">_data</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected int[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.html#Z:Z_ptr">_ptr</a></span></code>
<div class="block">Bitmaps, one per uncompressed value tuple in <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#Z:Z_dict"><code>ColGroupValue._dict</code></a>.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.html#ALLOW_CACHE_CONSCIOUS_ROWSUMS">ALLOW_CACHE_CONSCIOUS_ROWSUMS</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.html#CREATE_SKIP_LIST">CREATE_SKIP_LIST</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.html#READ_CACHE_BLKSZ">READ_CACHE_BLKSZ</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.html#WRITE_CACHE_BLKSZ">WRITE_CACHE_BLKSZ</a></span></code>&nbsp;</td>
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<h3>Fields inherited from class&nbsp;org.apache.sysds.runtime.compress.colgroup.<a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroupValue</a></h3>
<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#Z:Z_dict">_dict</a></code></li>
</ul>
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<h3>Fields inherited from class&nbsp;org.apache.sysds.runtime.compress.colgroup.<a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup</a></h3>
<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#Z:Z_colIndexes">_colIndexes</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#Z:Z_numRows">_numRows</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#Z:Z_zeros">_zeros</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#LOG">LOG</a></code></li>
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<td class="colFirst"><code>&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.html#ColGroupOffset--">ColGroupOffset</a></span>()</code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.html#ColGroupOffset-int:A-int-boolean-double:A-">ColGroupOffset</a></span>(int[]&nbsp;colIndices,
int&nbsp;numRows,
boolean&nbsp;zeros,
double[]&nbsp;values)</code>
<div class="block">Constructor for subclass methods that need to create shallow copies</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.html#ColGroupOffset-int:A-int-org.apache.sysds.runtime.compress.UncompressedBitmap-">ColGroupOffset</a></span>(int[]&nbsp;colIndices,
int&nbsp;numRows,
<a href="../../../../../../org/apache/sysds/runtime/compress/UncompressedBitmap.html" title="class in org.apache.sysds.runtime.compress">UncompressedBitmap</a>&nbsp;ubm)</code>
<div class="block">Main constructor.</div>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<td class="colFirst"><code>protected int[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.html#computeOffsets-boolean:A-">computeOffsets</a></span>(boolean[]&nbsp;ind)</code>
<div class="block">Utility function of sparse-unsafe operations.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>protected abstract boolean[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.html#computeZeroIndicatorVector--">computeZeroIndicatorVector</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.html#createCompressedBitmaps-int-int-char:A:A-">createCompressedBitmaps</a></span>(int&nbsp;numVals,
int&nbsp;totalLen,
char[][]&nbsp;lbitmaps)</code>&nbsp;</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.html#decompressToBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-int-">decompressToBlock</a></span>(<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;target,
int&nbsp;colpos)</code>
<div class="block">Decompress to block.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.html#decompressToBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-int:A-">decompressToBlock</a></span>(<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;target,
int[]&nbsp;colIndexTargets)</code>
<div class="block">Decompress the contents of this column group into uncompressed packed columns</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.html#decompressToBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-int-int-">decompressToBlock</a></span>(<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;target,
int&nbsp;rl,
int&nbsp;ru)</code>
<div class="block">Decompress the contents of this column group into the specified full matrix block.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.html#estimateInMemorySize--">estimateInMemorySize</a></span>()</code>
<div class="block">Note: Must be overridden by child classes to account for additional data and metadata</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.html#get-int-int-">get</a></span>(int&nbsp;r,
int&nbsp;c)</code>
<div class="block">Get the value at a global row/column position.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>int[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.html#getBitmapOffsets--">getBitmapOffsets</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>char[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.html#getBitmaps--">getBitmaps</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.html#getExactSizeOnDisk--">getExactSizeOnDisk</a></span>()</code>
<div class="block">Returns the exact serialized size of column group.</div>
</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>abstract <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.html#getIterator-int-">getIterator</a></span>(int&nbsp;k)</code>&nbsp;</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</a>&lt;<a href="../../../../../../org/apache/sysds/runtime/matrix/data/IJV.html" title="class in org.apache.sysds.runtime.matrix.data">IJV</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.html#getIterator-int-int-boolean-boolean-">getIterator</a></span>(int&nbsp;rl,
int&nbsp;ru,
boolean&nbsp;inclZeros,
boolean&nbsp;rowMajor)</code>
<div class="block">Create a column group iterator for a row index range.</div>
</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code>abstract <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.html#getIterator-int-int-int-">getIterator</a></span>(int&nbsp;k,
int&nbsp;rl,
int&nbsp;ru)</code>&nbsp;</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.html#hasZeros--">hasZeros</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i15" class="rowColor">
<td class="colFirst"><code>protected int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.html#len-int-">len</a></span>(int&nbsp;k)</code>&nbsp;</td>
</tr>
<tr id="i16" class="altColor">
<td class="colFirst"><code>protected double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.html#mxxValues-int-org.apache.sysds.runtime.functionobjects.Builtin-">mxxValues</a></span>(int&nbsp;bitmapIx,
<a href="../../../../../../org/apache/sysds/runtime/functionobjects/Builtin.html" title="class in org.apache.sysds.runtime.functionobjects">Builtin</a>&nbsp;builtin)</code>&nbsp;</td>
</tr>
<tr id="i17" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.html#readFields-java.io.DataInput-">readFields</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataInput.html?is-external=true" title="class or interface in java.io">DataInput</a>&nbsp;in)</code>
<div class="block">Deserializes column group from data input.</div>
</td>
</tr>
<tr id="i18" class="altColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.html#sumAllValues-double:A-double:A-">sumAllValues</a></span>(double[]&nbsp;b,
double[]&nbsp;c)</code>&nbsp;</td>
</tr>
<tr id="i19" class="rowColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/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/sysds/runtime/compress/colgroup/ColGroupOffset.html#toString--">toString</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i20" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupOffset.html#write-java.io.DataOutput-">write</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataOutput.html?is-external=true" title="class or interface in java.io">DataOutput</a>&nbsp;out)</code>
<div class="block">Serializes column group to data output.</div>
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<ul class="blockList">
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<h3>Methods inherited from class&nbsp;org.apache.sysds.runtime.compress.colgroup.<a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroupValue</a></h3>
<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#allocDVector-int-boolean-">allocDVector</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#allocIVector-int-boolean-">allocIVector</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#applyScalarOp-org.apache.sysds.runtime.matrix.operators.ScalarOperator-">applyScalarOp</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#applyScalarOp-org.apache.sysds.runtime.matrix.operators.ScalarOperator-double-int-">applyScalarOp</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#cleanupThreadLocalMemory--">cleanupThreadLocalMemory</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#computeColMxx-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.functionobjects.Builtin-boolean-">computeColMxx</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#computeColSums-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.functionobjects.KahanFunction-">computeColSums</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#computeMxx-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.functionobjects.Builtin-boolean-">computeMxx</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#computeRowMxx-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.functionobjects.Builtin-int-int-">computeRowMxx</a>, <a 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<h3>Methods inherited from class&nbsp;org.apache.sysds.runtime.compress.colgroup.<a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup</a></h3>
<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#countNonZerosPerRow-int:A-int-int-">countNonZerosPerRow</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#getColGroupType--">getColGroupType</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#getColIndex-int-">getColIndex</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#getColIndices--">getColIndices</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#getCompType--">getCompType</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#getNumCols--">getNumCols</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#getNumRows--">getNumRows</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#getRowIterator-int-int-">getRowIterator</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#leftMultByRowVector-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-">leftMultByRowVector</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#readFields-java.io.DataInput-boolean-">readFields</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#rightMultByVector-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-int-int-">rightMultByVector</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#scalarOperation-org.apache.sysds.runtime.matrix.operators.ScalarOperator-">scalarOperation</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#shiftColIndices-int-">shiftColIndices</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#write-java.io.DataOutput-boolean-">write</a></code></li>
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<h3>Methods inherited from class&nbsp;java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3>
<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/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>Field Detail</h3>
<a name="CREATE_SKIP_LIST">
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<h4>CREATE_SKIP_LIST</h4>
<pre>protected static final&nbsp;boolean CREATE_SKIP_LIST</pre>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../../constant-values.html#org.apache.sysds.runtime.compress.colgroup.ColGroupOffset.CREATE_SKIP_LIST">Constant Field Values</a></dd>
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<pre>protected static final&nbsp;int READ_CACHE_BLKSZ</pre>
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<dd><a href="../../../../../../constant-values.html#org.apache.sysds.runtime.compress.colgroup.ColGroupOffset.READ_CACHE_BLKSZ">Constant Field Values</a></dd>
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<h4>WRITE_CACHE_BLKSZ</h4>
<pre>public static final&nbsp;int WRITE_CACHE_BLKSZ</pre>
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<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../../constant-values.html#org.apache.sysds.runtime.compress.colgroup.ColGroupOffset.WRITE_CACHE_BLKSZ">Constant Field Values</a></dd>
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<pre>public static&nbsp;boolean ALLOW_CACHE_CONSCIOUS_ROWSUMS</pre>
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<h4>_ptr</h4>
<pre>protected&nbsp;int[] _ptr</pre>
<div class="block">Bitmaps, one per uncompressed value tuple in <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#Z:Z_dict"><code>ColGroupValue._dict</code></a>.</div>
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<h4>_data</h4>
<pre>protected&nbsp;char[] _data</pre>
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<a name="ColGroupOffset--">
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<h4>ColGroupOffset</h4>
<pre>public&nbsp;ColGroupOffset()</pre>
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<h4>ColGroupOffset</h4>
<pre>public&nbsp;ColGroupOffset(int[]&nbsp;colIndices,
int&nbsp;numRows,
<a href="../../../../../../org/apache/sysds/runtime/compress/UncompressedBitmap.html" title="class in org.apache.sysds.runtime.compress">UncompressedBitmap</a>&nbsp;ubm)</pre>
<div class="block">Main constructor. Stores the headers for the individual bitmaps.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>colIndices</code> - indices (within the block) of the columns included in this column</dd>
<dd><code>numRows</code> - total number of rows in the parent block</dd>
<dd><code>ubm</code> - Uncompressed bitmap representation of the block</dd>
</dl>
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<a name="ColGroupOffset-int:A-int-boolean-double:A-">
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<h4>ColGroupOffset</h4>
<pre>protected&nbsp;ColGroupOffset(int[]&nbsp;colIndices,
int&nbsp;numRows,
boolean&nbsp;zeros,
double[]&nbsp;values)</pre>
<div class="block">Constructor for subclass methods that need to create shallow copies</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>colIndices</code> - raw column index information</dd>
<dd><code>numRows</code> - number of rows in the block</dd>
<dd><code>zeros</code> - indicator if column group contains zero values</dd>
<dd><code>values</code> - set of distinct values for the block (associated bitmaps are kept in the subclass)</dd>
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<h4>len</h4>
<pre>protected final&nbsp;int&nbsp;len(int&nbsp;k)</pre>
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<a name="createCompressedBitmaps-int-int-char:A:A-">
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<h4>createCompressedBitmaps</h4>
<pre>protected&nbsp;void&nbsp;createCompressedBitmaps(int&nbsp;numVals,
int&nbsp;totalLen,
char[][]&nbsp;lbitmaps)</pre>
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<h4>estimateInMemorySize</h4>
<pre>public&nbsp;long&nbsp;estimateInMemorySize()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#estimateInMemorySize--">ColGroup</a></code></span></div>
<div class="block">Note: Must be overridden by child classes to account for additional data and metadata</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#estimateInMemorySize--">estimateInMemorySize</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroupValue</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>an upper bound on the number of bytes used to store this ColGroup in memory.</dd>
</dl>
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<a name="decompressToBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-int-int-">
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<h4>decompressToBlock</h4>
<pre>public&nbsp;void&nbsp;decompressToBlock(<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;target,
int&nbsp;rl,
int&nbsp;ru)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#decompressToBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-int-int-">ColGroup</a></code></span></div>
<div class="block">Decompress the contents of this column group into the specified full matrix block.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#decompressToBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-int-int-">decompressToBlock</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>target</code> - a matrix block where the columns covered by this column group have not yet been filled in.</dd>
<dd><code>rl</code> - row lower</dd>
<dd><code>ru</code> - row upper</dd>
</dl>
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<h4>decompressToBlock</h4>
<pre>public&nbsp;void&nbsp;decompressToBlock(<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;target,
int[]&nbsp;colIndexTargets)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#decompressToBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-int:A-">ColGroup</a></code></span></div>
<div class="block">Decompress the contents of this column group into uncompressed packed columns</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#decompressToBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-int:A-">decompressToBlock</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>target</code> - a dense matrix block. The block must have enough space to hold the contents of this column
group.</dd>
<dd><code>colIndexTargets</code> - array that maps column indices in the original matrix block to columns of target.</dd>
</dl>
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<a name="decompressToBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-int-">
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<h4>decompressToBlock</h4>
<pre>public&nbsp;void&nbsp;decompressToBlock(<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;target,
int&nbsp;colpos)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#decompressToBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-int-">ColGroup</a></code></span></div>
<div class="block">Decompress to block.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#decompressToBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-int-">decompressToBlock</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>target</code> - dense output vector</dd>
<dd><code>colpos</code> - column to decompress, error if larger or equal numCols</dd>
</dl>
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<h4>get</h4>
<pre>public&nbsp;double&nbsp;get(int&nbsp;r,
int&nbsp;c)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#get-int-int-">ColGroup</a></code></span></div>
<div class="block">Get the value at a global row/column position.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#get-int-int-">get</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>r</code> - row</dd>
<dd><code>c</code> - column</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>value at the row/column position</dd>
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<h4>sumAllValues</h4>
<pre>protected final&nbsp;void&nbsp;sumAllValues(double[]&nbsp;b,
double[]&nbsp;c)</pre>
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<h4>mxxValues</h4>
<pre>protected final&nbsp;double&nbsp;mxxValues(int&nbsp;bitmapIx,
<a href="../../../../../../org/apache/sysds/runtime/functionobjects/Builtin.html" title="class in org.apache.sysds.runtime.functionobjects">Builtin</a>&nbsp;builtin)</pre>
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<h4>getBitmaps</h4>
<pre>public&nbsp;char[]&nbsp;getBitmaps()</pre>
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<h4>getBitmapOffsets</h4>
<pre>public&nbsp;int[]&nbsp;getBitmapOffsets()</pre>
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<h4>hasZeros</h4>
<pre>public&nbsp;boolean&nbsp;hasZeros()</pre>
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<h4>computeOffsets</h4>
<pre>protected&nbsp;int[]&nbsp;computeOffsets(boolean[]&nbsp;ind)</pre>
<div class="block">Utility function of sparse-unsafe operations.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>ind</code> - row indicator vector of non zeros</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>offsets</dd>
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<h4>readFields</h4>
<pre>public&nbsp;void&nbsp;readFields(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataInput.html?is-external=true" title="class or interface in java.io">DataInput</a>&nbsp;in)
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:&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#readFields-java.io.DataInput-">ColGroup</a></code></span></div>
<div class="block">Deserializes column group from data input.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#readFields-java.io.DataInput-">readFields</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>in</code> - data input</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> - if IOException occurs</dd>
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<h4>write</h4>
<pre>public&nbsp;void&nbsp;write(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataOutput.html?is-external=true" title="class or interface in java.io">DataOutput</a>&nbsp;out)
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:&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#write-java.io.DataOutput-">ColGroup</a></code></span></div>
<div class="block">Serializes column group to data output.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#write-java.io.DataOutput-">write</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>out</code> - data output</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> - if IOException occurs</dd>
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<h4>getExactSizeOnDisk</h4>
<pre>public&nbsp;long&nbsp;getExactSizeOnDisk()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#getExactSizeOnDisk--">ColGroup</a></code></span></div>
<div class="block">Returns the exact serialized size of column group. This can be used for example for buffer preallocation.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#getExactSizeOnDisk--">getExactSizeOnDisk</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>exact serialized size for column group</dd>
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<h4>computeZeroIndicatorVector</h4>
<pre>protected abstract&nbsp;boolean[]&nbsp;computeZeroIndicatorVector()</pre>
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<h4>getIterator</h4>
<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</a>&lt;<a href="../../../../../../org/apache/sysds/runtime/matrix/data/IJV.html" title="class in org.apache.sysds.runtime.matrix.data">IJV</a>&gt;&nbsp;getIterator(int&nbsp;rl,
int&nbsp;ru,
boolean&nbsp;inclZeros,
boolean&nbsp;rowMajor)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#getIterator-int-int-boolean-boolean-">ColGroup</a></code></span></div>
<div class="block">Create a column group iterator for a row index range.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#getIterator-int-int-boolean-boolean-">getIterator</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>rl</code> - row lower index, inclusive</dd>
<dd><code>ru</code> - row upper index, exclusive</dd>
<dd><code>inclZeros</code> - include zero values into scope of iterator</dd>
<dd><code>rowMajor</code> - use a row major iteration order</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>an iterator instance</dd>
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<h4>getIterator</h4>
<pre>public abstract&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>&gt;&nbsp;getIterator(int&nbsp;k)</pre>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>k</code> - index of value tuple with associated bitmap</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>an iterator over the row offsets in this bitmap</dd>
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<h4>getIterator</h4>
<pre>public abstract&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>&gt;&nbsp;getIterator(int&nbsp;k,
int&nbsp;rl,
int&nbsp;ru)</pre>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>k</code> - index of value tuple with associated bitmap</dd>
<dd><code>rl</code> - row lower index, inclusive</dd>
<dd><code>ru</code> - row upper index, exclusive</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>an iterator over the row offsets in this bitmap</dd>
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<h4>toString</h4>
<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;toString()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#toString--">toString</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroupValue</a></code></dd>
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