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<h1 title="Package" class="title">Package&nbsp;org.apache.arrow.vector.util</h1>
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<th class="colFirst" scope="col">Interface</th>
<th class="colLast" scope="col">Description</th>
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<td class="colFirst"><a href="../../../../../org/apache/arrow/vector/util/CallBack.html" title="interface in org.apache.arrow.vector.util">CallBack</a></td>
<td class="colLast">
<div class="block">Generic callback interface to be notified of events on value vectors.</div>
</td>
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<tr class="rowColor">
<td class="colFirst"><a href="../../../../../org/apache/arrow/vector/util/MapWithOrdinal.html" title="interface in org.apache.arrow.vector.util">MapWithOrdinal</a>&lt;K,V&gt;</td>
<td class="colLast">
<div class="block">An implementation of a map that supports constant time look-up by a generic key or an ordinal.</div>
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</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../org/apache/arrow/vector/util/TransferPair.html" title="interface in org.apache.arrow.vector.util">TransferPair</a></td>
<td class="colLast">
<div class="block">Interface for copying values between a pair of two vectors of the same type.</div>
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<th class="colFirst" scope="col">Class</th>
<th class="colLast" scope="col">Description</th>
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<td class="colFirst"><a href="../../../../../org/apache/arrow/vector/util/ByteArrayReadableSeekableByteChannel.html" title="class in org.apache.arrow.vector.util">ByteArrayReadableSeekableByteChannel</a></td>
<td class="colLast">
<div class="block">A <a href="https://docs.oracle.com/javase/8/docs/api/java/nio/channels/SeekableByteChannel.html?is-external=true" title="class or interface in java.nio.channels"><code>SeekableByteChannel</code></a> backed by a byte array.</div>
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<td class="colFirst"><a href="../../../../../org/apache/arrow/vector/util/DataSizeRoundingUtil.html" title="class in org.apache.arrow.vector.util">DataSizeRoundingUtil</a></td>
<td class="colLast">
<div class="block">Utilities for rounding data size.</div>
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<td class="colFirst"><a href="../../../../../org/apache/arrow/vector/util/DateUtility.html" title="class in org.apache.arrow.vector.util">DateUtility</a></td>
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<div class="block">Utility class for Date, DateTime, TimeStamp, Interval data types.</div>
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<td class="colFirst"><a href="../../../../../org/apache/arrow/vector/util/DecimalUtility.html" title="class in org.apache.arrow.vector.util">DecimalUtility</a></td>
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<div class="block">Utility methods for configurable precision Decimal values (e.g.</div>
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<td class="colFirst"><a href="../../../../../org/apache/arrow/vector/util/DictionaryUtility.html" title="class in org.apache.arrow.vector.util">DictionaryUtility</a></td>
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<div class="block">Utility methods for working with Dictionaries used in Dictionary encodings.</div>
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<td class="colFirst"><a href="../../../../../org/apache/arrow/vector/util/ElementAddressableVectorIterator.html" title="class in org.apache.arrow.vector.util">ElementAddressableVectorIterator</a>&lt;T extends <a href="../../../../../org/apache/arrow/vector/ElementAddressableVector.html" title="interface in org.apache.arrow.vector">ElementAddressableVector</a>&gt;</td>
<td class="colLast">
<div class="block">Iterator for traversing elements of a <a href="../../../../../org/apache/arrow/vector/ElementAddressableVector.html" title="interface in org.apache.arrow.vector"><code>ElementAddressableVector</code></a>.</div>
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<td class="colFirst"><a href="../../../../../org/apache/arrow/vector/util/JsonStringArrayList.html" title="class in org.apache.arrow.vector.util">JsonStringArrayList</a>&lt;E&gt;</td>
<td class="colLast">
<div class="block">Extension of <a href="https://docs.oracle.com/javase/8/docs/api/java/util/ArrayList.html?is-external=true" title="class or interface in java.util"><code>ArrayList</code></a> that <a href="../../../../../org/apache/arrow/vector/util/JsonStringArrayList.html#toString--"><code>JsonStringArrayList.toString()</code></a> method returns the serialized JSON
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<td class="colFirst"><a href="../../../../../org/apache/arrow/vector/util/JsonStringHashMap.html" title="class in org.apache.arrow.vector.util">JsonStringHashMap</a>&lt;K,V&gt;</td>
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<div class="block">Simple class that extends the regular java.util.HashMap but overrides the
toString() method of the HashMap class to produce a JSON string instead</div>
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<td class="colFirst"><a href="../../../../../org/apache/arrow/vector/util/MapWithOrdinalImpl.html" title="class in org.apache.arrow.vector.util">MapWithOrdinalImpl</a>&lt;K,V&gt;</td>
<td class="colLast">
<div class="block">An implementation of map that supports constant time look-up by a generic key or an ordinal.</div>
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<td class="colFirst"><a href="../../../../../org/apache/arrow/vector/util/MultiMapWithOrdinal.html" title="class in org.apache.arrow.vector.util">MultiMapWithOrdinal</a>&lt;K,V&gt;</td>
<td class="colLast">
<div class="block">An implementation of a multimap that supports constant time look-up by a generic key or an ordinal.</div>
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<td class="colFirst"><a href="../../../../../org/apache/arrow/vector/util/ObjectMapperFactory.html" title="class in org.apache.arrow.vector.util">ObjectMapperFactory</a></td>
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<div class="block">A <code>ObjectMapper</code> factory to read/write JSON.</div>
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<td class="colFirst"><a href="../../../../../org/apache/arrow/vector/util/PromotableMultiMapWithOrdinal.html" title="class in org.apache.arrow.vector.util">PromotableMultiMapWithOrdinal</a>&lt;K,V&gt;</td>
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<div class="block">Implementation of MapWithOrdinal that allows for promotion to multimap when duplicate fields exist.</div>
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<td class="colFirst"><a href="../../../../../org/apache/arrow/vector/util/ReusableByteArray.html" title="class in org.apache.arrow.vector.util">ReusableByteArray</a></td>
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<div class="block">A wrapper around byte arrays for repeated writing.</div>
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<td class="colFirst"><a href="../../../../../org/apache/arrow/vector/util/SchemaUtility.html" title="class in org.apache.arrow.vector.util">SchemaUtility</a></td>
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<div class="block">Schema utility class including serialization and deserialization.</div>
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<td class="colFirst"><a href="../../../../../org/apache/arrow/vector/util/Text.html" title="class in org.apache.arrow.vector.util">Text</a></td>
<td class="colLast">
<div class="block">A simplified byte wrapper similar to Hadoop's Text class without all the dependencies.</div>
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<td class="colFirst"><a href="../../../../../org/apache/arrow/vector/util/Text.TextSerializer.html" title="class in org.apache.arrow.vector.util">Text.TextSerializer</a></td>
<td class="colLast">
<div class="block">JSON serializer for <a href="../../../../../org/apache/arrow/vector/util/Text.html" title="class in org.apache.arrow.vector.util"><code>Text</code></a>.</div>
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<td class="colFirst"><a href="../../../../../org/apache/arrow/vector/util/TransferPairBenchmarks.html" title="class in org.apache.arrow.vector.util">TransferPairBenchmarks</a></td>
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<div class="block">Benchmarks for <a href="../../../../../org/apache/arrow/vector/util/TransferPair.html" title="interface in org.apache.arrow.vector.util"><code>TransferPair</code></a>.</div>
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<td class="colFirst"><a href="../../../../../org/apache/arrow/vector/util/Validator.html" title="class in org.apache.arrow.vector.util">Validator</a></td>
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<div class="block">Utility class for validating arrow data structures.</div>
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<td class="colFirst"><a href="../../../../../org/apache/arrow/vector/util/ValueVectorUtility.html" title="class in org.apache.arrow.vector.util">ValueVectorUtility</a></td>
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<div class="block">Utility methods for <a href="../../../../../org/apache/arrow/vector/ValueVector.html" title="interface in org.apache.arrow.vector"><code>ValueVector</code></a>.</div>
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<td class="colFirst"><a href="../../../../../org/apache/arrow/vector/util/VectorAppender.html" title="class in org.apache.arrow.vector.util">VectorAppender</a></td>
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<div class="block">Utility to append two vectors together.</div>
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<td class="colFirst"><a href="../../../../../org/apache/arrow/vector/util/VectorBatchAppender.html" title="class in org.apache.arrow.vector.util">VectorBatchAppender</a></td>
<td class="colLast">
<div class="block">Utility to add vector values in batch.</div>
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<td class="colFirst"><a href="../../../../../org/apache/arrow/vector/util/VectorSchemaRootAppender.html" title="class in org.apache.arrow.vector.util">VectorSchemaRootAppender</a></td>
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<div class="block">Utility to append <a href="../../../../../org/apache/arrow/vector/VectorSchemaRoot.html" title="class in org.apache.arrow.vector"><code>VectorSchemaRoot</code></a>s with the same schema.</div>
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<th class="colFirst" scope="col">Exception</th>
<th class="colLast" scope="col">Description</th>
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<td class="colFirst"><a href="../../../../../org/apache/arrow/vector/util/OversizedAllocationException.html" title="class in org.apache.arrow.vector.util">OversizedAllocationException</a></td>
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<div class="block">An exception that is used to signal that allocation request in bytes is greater than the maximum allowed by
<code>allocator</code>.</div>
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<td class="colFirst"><a href="../../../../../org/apache/arrow/vector/util/SchemaChangeRuntimeException.html" title="class in org.apache.arrow.vector.util">SchemaChangeRuntimeException</a></td>
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<div class="block">Thrown when child vectors (e.g.</div>
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