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<div class="subTitle">org.apache.arrow.vector.types.pojo</div>
<h2 title="Class Schema" class="title">Class Schema</h2>
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<li>org.apache.arrow.vector.types.pojo.Schema</li>
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<pre>public class <span class="typeNameLabel">Schema</span>
extends <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></pre>
<div class="block">An Arrow Schema.</div>
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<th class="colOne" scope="col">Constructor and Description</th>
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<tr class="altColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/arrow/vector/types/pojo/Schema.html#Schema-java.lang.Iterable-">Schema</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a>&lt;<a href="../../../../../../org/apache/arrow/vector/types/pojo/Field.html" title="class in org.apache.arrow.vector.types.pojo">Field</a>&gt;&nbsp;fields)</code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/arrow/vector/types/pojo/Schema.html#Schema-java.lang.Iterable-java.util.Map-">Schema</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a>&lt;<a href="../../../../../../org/apache/arrow/vector/types/pojo/Field.html" title="class in org.apache.arrow.vector.types.pojo">Field</a>&gt;&nbsp;fields,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<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>,<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>&gt;&nbsp;metadata)</code>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<td class="colFirst"><code>static <a href="../../../../../../org/apache/arrow/vector/types/pojo/Schema.html" title="class in org.apache.arrow.vector.types.pojo">Schema</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/arrow/vector/types/pojo/Schema.html#convertSchema-org.apache.arrow.flatbuf.Schema-">convertSchema</a></span>(<a href="../../../../../../org/apache/arrow/flatbuf/Schema.html" title="class in org.apache.arrow.flatbuf">Schema</a>&nbsp;schema)</code>
<div class="block">Converts a flatbuffer schema to its POJO representation.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>static <a href="../../../../../../org/apache/arrow/vector/types/pojo/Schema.html" title="class in org.apache.arrow.vector.types.pojo">Schema</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/arrow/vector/types/pojo/Schema.html#deserialize-java.nio.ByteBuffer-">deserialize</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio">ByteBuffer</a>&nbsp;buffer)</code>
<div class="block"><span class="deprecatedLabel">Deprecated.</span>&nbsp;</div>
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<tr id="i2" class="altColor">
<td class="colFirst"><code>static <a href="../../../../../../org/apache/arrow/vector/types/pojo/Schema.html" title="class in org.apache.arrow.vector.types.pojo">Schema</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/arrow/vector/types/pojo/Schema.html#deserializeMessage-java.nio.ByteBuffer-">deserializeMessage</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio">ByteBuffer</a>&nbsp;buffer)</code>
<div class="block">Deserialize a schema that has been serialized as a message using <a href="../../../../../../org/apache/arrow/vector/types/pojo/Schema.html#serializeAsMessage--"><code>serializeAsMessage()</code></a>.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/arrow/vector/types/pojo/Schema.html#equals-java.lang.Object-">equals</a></span>(<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>&nbsp;obj)</code>&nbsp;</td>
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<tr id="i4" class="altColor">
<td class="colFirst"><code>static <a href="../../../../../../org/apache/arrow/vector/types/pojo/Field.html" title="class in org.apache.arrow.vector.types.pojo">Field</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/arrow/vector/types/pojo/Schema.html#findField-java.util.List-java.lang.String-">findField</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../../org/apache/arrow/vector/types/pojo/Field.html" title="class in org.apache.arrow.vector.types.pojo">Field</a>&gt;&nbsp;fields,
<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;name)</code>
<div class="block">Search for a field by name in given the list of fields.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/arrow/vector/types/pojo/Field.html" title="class in org.apache.arrow.vector.types.pojo">Field</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/arrow/vector/types/pojo/Schema.html#findField-java.lang.String-">findField</a></span>(<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;name)</code>
<div class="block">Search for a field by name in this Schema.</div>
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<tr id="i6" class="altColor">
<td class="colFirst"><code>static <a href="../../../../../../org/apache/arrow/vector/types/pojo/Schema.html" title="class in org.apache.arrow.vector.types.pojo">Schema</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/arrow/vector/types/pojo/Schema.html#fromJSON-java.lang.String-">fromJSON</a></span>(<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;json)</code>&nbsp;</td>
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<tr id="i7" class="rowColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<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>,<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>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/arrow/vector/types/pojo/Schema.html#getCustomMetadata--">getCustomMetadata</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../../org/apache/arrow/vector/types/pojo/Field.html" title="class in org.apache.arrow.vector.types.pojo">Field</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/arrow/vector/types/pojo/Schema.html#getFields--">getFields</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/arrow/vector/types/pojo/Schema.html#getSchema-com.google.flatbuffers.FlatBufferBuilder-">getSchema</a></span>(com.google.flatbuffers.FlatBufferBuilder&nbsp;builder)</code>
<div class="block">Adds this schema to the builder returning the size of the builder after adding.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/arrow/vector/types/pojo/Schema.html#hashCode--">hashCode</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>byte[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/arrow/vector/types/pojo/Schema.html#serializeAsMessage--">serializeAsMessage</a></span>()</code>
<div class="block">Returns the serialized flatbuffer bytes of the schema wrapped in a message table.</div>
</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>byte[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/arrow/vector/types/pojo/Schema.html#toByteArray--">toByteArray</a></span>()</code>
<div class="block"><span class="deprecatedLabel">Deprecated.</span>&nbsp;
<div class="block"><span class="deprecationComment">This method does not encapsulate the schema in a Message payload which is incompatible with other
languages. Use <a href="../../../../../../org/apache/arrow/vector/types/pojo/Schema.html#serializeAsMessage--"><code>serializeAsMessage()</code></a> instead.</span></div>
</div>
</td>
</tr>
<tr id="i13" 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/arrow/vector/types/pojo/Schema.html#toJson--">toJson</a></span>()</code>
<div class="block">Returns the JSON string representation of this schema.</div>
</td>
</tr>
<tr id="i14" class="altColor">
<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/arrow/vector/types/pojo/Schema.html#toString--">toString</a></span>()</code>&nbsp;</td>
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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#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#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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<h4>Schema</h4>
<pre>public&nbsp;Schema(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a>&lt;<a href="../../../../../../org/apache/arrow/vector/types/pojo/Field.html" title="class in org.apache.arrow.vector.types.pojo">Field</a>&gt;&nbsp;fields)</pre>
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<h4>Schema</h4>
<pre>public&nbsp;Schema(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a>&lt;<a href="../../../../../../org/apache/arrow/vector/types/pojo/Field.html" title="class in org.apache.arrow.vector.types.pojo">Field</a>&gt;&nbsp;fields,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<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>,<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>&gt;&nbsp;metadata)</pre>
<div class="block">Constructor with metadata.</div>
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<a name="findField-java.util.List-java.lang.String-">
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<h4>findField</h4>
<pre>public static&nbsp;<a href="../../../../../../org/apache/arrow/vector/types/pojo/Field.html" title="class in org.apache.arrow.vector.types.pojo">Field</a>&nbsp;findField(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../../org/apache/arrow/vector/types/pojo/Field.html" title="class in org.apache.arrow.vector.types.pojo">Field</a>&gt;&nbsp;fields,
<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;name)</pre>
<div class="block">Search for a field by name in given the list of fields.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>fields</code> - the list of the fields</dd>
<dd><code>name</code> - the name of the field to return</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the corresponding field</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - if the field was not found</dd>
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<h4>fromJSON</h4>
<pre>public static&nbsp;<a href="../../../../../../org/apache/arrow/vector/types/pojo/Schema.html" title="class in org.apache.arrow.vector.types.pojo">Schema</a>&nbsp;fromJSON(<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;json)
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>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
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<h4>deserialize</h4>
<pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a>
public static&nbsp;<a href="../../../../../../org/apache/arrow/vector/types/pojo/Schema.html" title="class in org.apache.arrow.vector.types.pojo">Schema</a>&nbsp;deserialize(<a href="https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio">ByteBuffer</a>&nbsp;buffer)</pre>
<div class="block"><span class="deprecatedLabel">Deprecated.</span>&nbsp;</div>
<div class="block">Deserialize a schema that has been serialized using <a href="../../../../../../org/apache/arrow/vector/types/pojo/Schema.html#toByteArray--"><code>toByteArray()</code></a>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>buffer</code> - the bytes to deserialize.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The deserialized schema.</dd>
</dl>
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<h4>deserializeMessage</h4>
<pre>public static&nbsp;<a href="../../../../../../org/apache/arrow/vector/types/pojo/Schema.html" title="class in org.apache.arrow.vector.types.pojo">Schema</a>&nbsp;deserializeMessage(<a href="https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio">ByteBuffer</a>&nbsp;buffer)</pre>
<div class="block">Deserialize a schema that has been serialized as a message using <a href="../../../../../../org/apache/arrow/vector/types/pojo/Schema.html#serializeAsMessage--"><code>serializeAsMessage()</code></a>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>buffer</code> - the bytes to deserialize.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The deserialized schema.</dd>
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<h4>convertSchema</h4>
<pre>public static&nbsp;<a href="../../../../../../org/apache/arrow/vector/types/pojo/Schema.html" title="class in org.apache.arrow.vector.types.pojo">Schema</a>&nbsp;convertSchema(<a href="../../../../../../org/apache/arrow/flatbuf/Schema.html" title="class in org.apache.arrow.flatbuf">Schema</a>&nbsp;schema)</pre>
<div class="block">Converts a flatbuffer schema to its POJO representation.</div>
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<h4>getFields</h4>
<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../../org/apache/arrow/vector/types/pojo/Field.html" title="class in org.apache.arrow.vector.types.pojo">Field</a>&gt;&nbsp;getFields()</pre>
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<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<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>,<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>&gt;&nbsp;getCustomMetadata()</pre>
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<h4>findField</h4>
<pre>public&nbsp;<a href="../../../../../../org/apache/arrow/vector/types/pojo/Field.html" title="class in org.apache.arrow.vector.types.pojo">Field</a>&nbsp;findField(<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;name)</pre>
<div class="block">Search for a field by name in this Schema.</div>
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<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>name</code> - the name of the field to return</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the corresponding field</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - if the field was not found</dd>
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<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;toJson()</pre>
<div class="block">Returns the JSON string representation of this schema.</div>
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<h4>getSchema</h4>
<pre>public&nbsp;int&nbsp;getSchema(com.google.flatbuffers.FlatBufferBuilder&nbsp;builder)</pre>
<div class="block">Adds this schema to the builder returning the size of the builder after adding.</div>
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<pre>public&nbsp;byte[]&nbsp;serializeAsMessage()</pre>
<div class="block">Returns the serialized flatbuffer bytes of the schema wrapped in a message table.
Use <a href="../../../../../../org/apache/arrow/vector/types/pojo/Schema.html#deserializeMessage-java.nio.ByteBuffer-"><code>deserializeMessage(ByteBuffer)</code></a> to rebuild the Schema.</div>
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<pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a>
public&nbsp;byte[]&nbsp;toByteArray()</pre>
<div class="block"><span class="deprecatedLabel">Deprecated.</span>&nbsp;<span class="deprecationComment">This method does not encapsulate the schema in a Message payload which is incompatible with other
languages. Use <a href="../../../../../../org/apache/arrow/vector/types/pojo/Schema.html#serializeAsMessage--"><code>serializeAsMessage()</code></a> instead.</span></div>
<div class="block">Returns the serialized flatbuffer representation of this schema.</div>
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<pre>public&nbsp;int&nbsp;hashCode()</pre>
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<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><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></code>&nbsp;in class&nbsp;<code><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></code></dd>
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<pre>public&nbsp;boolean&nbsp;equals(<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>&nbsp;obj)</pre>
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<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><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></code>&nbsp;in class&nbsp;<code><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></code></dd>
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<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="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a></code>&nbsp;in class&nbsp;<code><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></code></dd>
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