36/javadoc/org/apache/kafka/connect/storage/SimpleHeaderConverter.html - kafka-site - Git at Google

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 <div class="sub-title"><span class="package-label-in-type">Package</span>&nbsp;<a href="package-summary.html">org.apache.kafka.connect.storage</a></div>
 <h1 title="Class SimpleHeaderConverter" class="title">Class SimpleHeaderConverter</h1>
 </div>
 <div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">java.lang.Object</a>
 <div class="inheritance">org.apache.kafka.connect.storage.SimpleHeaderConverter</div>
 </div>
 <section class="class-description" id="class-description">
 <dl class="notes">
 <dt>All Implemented Interfaces:</dt>
 <dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/Closeable.html" title="class or interface in java.io" class="external-link">Closeable</a></code>, <code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/AutoCloseable.html" title="class or interface in java.lang" class="external-link">AutoCloseable</a></code>, <code><a href="../../common/Configurable.html" title="interface in org.apache.kafka.common">Configurable</a></code>, <code><a href="../components/Versioned.html" title="interface in org.apache.kafka.connect.components">Versioned</a></code>, <code><a href="HeaderConverter.html" title="interface in org.apache.kafka.connect.storage">HeaderConverter</a></code></dd>
 </dl>
 <hr>
 <div class="type-signature"><span class="modifiers">public class </span><span class="element-name type-name-label">SimpleHeaderConverter</span>
 <span class="extends-implements">extends <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a>
 implements <a href="HeaderConverter.html" title="interface in org.apache.kafka.connect.storage">HeaderConverter</a>, <a href="../components/Versioned.html" title="interface in org.apache.kafka.connect.components">Versioned</a></span></div>
 <div class="block">A <a href="HeaderConverter.html" title="interface in org.apache.kafka.connect.storage"><code>HeaderConverter</code></a> that serializes header values as strings and that deserializes header values to the most appropriate
  numeric, boolean, array, or map representation. Schemas are not serialized, but are inferred upon deserialization when possible.</div>
 </section>
 <section class="summary">
 <ul class="summary-list">
 <!-- ======== CONSTRUCTOR SUMMARY ======== -->
 <li>
 <section class="constructor-summary" id="constructor-summary">
 <h2>Constructor Summary</h2>
 <div class="caption"><span>Constructors</span></div>
 <div class="summary-table two-column-summary">
 <div class="table-header col-first">Constructor</div>
 <div class="table-header col-last">Description</div>
 <div class="col-constructor-name even-row-color"><code><a href="#%3Cinit%3E()" class="member-name-link">SimpleHeaderConverter</a>()</code></div>
 <div class="col-last even-row-color">&nbsp;</div>
 </div>
 </section>
 </li>
 <!-- ========== METHOD SUMMARY =========== -->
 <li>
 <section class="method-summary" id="method-summary">
 <h2>Method Summary</h2>
 <div id="method-summary-table">
 <div class="table-tabs" role="tablist" aria-orientation="horizontal"><button id="method-summary-table-tab0" role="tab" aria-selected="true" aria-controls="method-summary-table.tabpanel" tabindex="0" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table', 3)" class="active-table-tab">All Methods</button><button id="method-summary-table-tab2" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab2', 3)" class="table-tab">Instance Methods</button><button id="method-summary-table-tab4" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab4', 3)" class="table-tab">Concrete Methods</button></div>
 <div id="method-summary-table.tabpanel" role="tabpanel">
 <div class="summary-table three-column-summary" aria-labelledby="method-summary-table-tab0">
 <div class="table-header col-first">Modifier and Type</div>
 <div class="table-header col-second">Method</div>
 <div class="table-header col-last">Description</div>
 <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
 <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#close()" class="member-name-link">close</a>()</code></div>
 <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">&nbsp;</div>
 <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="../../common/config/ConfigDef.html" title="class in org.apache.kafka.common.config">ConfigDef</a></code></div>
 <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#config()" class="member-name-link">config</a>()</code></div>
 <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
 <div class="block">Configuration specification for this set of header converters.</div>
 </div>
 <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
 <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#configure(java.util.Map)" class="member-name-link">configure</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Map.html" title="class or interface in java.util" class="external-link">Map</a>&lt;<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>,<wbr>?&gt;&nbsp;configs)</code></div>
 <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
 <div class="block">Configure this class with the given key-value pairs</div>
 </div>
 <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>byte[]</code></div>
 <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#fromConnectHeader(java.lang.String,java.lang.String,org.apache.kafka.connect.data.Schema,java.lang.Object)" class="member-name-link">fromConnectHeader</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>&nbsp;topic,
  <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>&nbsp;headerKey,
  <a href="../data/Schema.html" title="interface in org.apache.kafka.connect.data">Schema</a>&nbsp;schema,
  <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a>&nbsp;value)</code></div>
 <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
 <div class="block">Convert the <a href="../header/Header.html" title="interface in org.apache.kafka.connect.header"><code>Header</code></a>'s <a href="../header/Header.html#value()"><code>value</code></a> into its byte array representation.</div>
 </div>
 <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="../data/SchemaAndValue.html" title="class in org.apache.kafka.connect.data">SchemaAndValue</a></code></div>
 <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#toConnectHeader(java.lang.String,java.lang.String,byte%5B%5D)" class="member-name-link">toConnectHeader</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>&nbsp;topic,
  <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>&nbsp;headerKey,
  byte[]&nbsp;value)</code></div>
 <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
 <div class="block">Convert the header name and byte array value into a <a href="../header/Header.html" title="interface in org.apache.kafka.connect.header"><code>Header</code></a> object.</div>
 </div>
 <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></code></div>
 <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#version()" class="member-name-link">version</a>()</code></div>
 <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
 <div class="block">Get the version of this component.</div>
 </div>
 </div>
 </div>
 </div>
 <div class="inherited-list">
 <h3 id="methods-inherited-from-class-java.lang.Object">Methods inherited from class&nbsp;java.lang.<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></h3>
 <code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#clone()" title="class or interface in java.lang" class="external-link">clone</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang" class="external-link">equals</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#finalize()" title="class or interface in java.lang" class="external-link">finalize</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#getClass()" title="class or interface in java.lang" class="external-link">getClass</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#hashCode()" title="class or interface in java.lang" class="external-link">hashCode</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#notify()" title="class or interface in java.lang" class="external-link">notify</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#notifyAll()" title="class or interface in java.lang" class="external-link">notifyAll</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#toString()" title="class or interface in java.lang" class="external-link">toString</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait()" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait(long)" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait(long,int)" title="class or interface in java.lang" class="external-link">wait</a></code></div>
 </section>
 </li>
 </ul>
 </section>
 <section class="details">
 <ul class="details-list">
 <!-- ========= CONSTRUCTOR DETAIL ======== -->
 <li>
 <section class="constructor-details" id="constructor-detail">
 <h2>Constructor Details</h2>
 <ul class="member-list">
 <li>
 <section class="detail" id="&lt;init&gt;()">
 <h3>SimpleHeaderConverter</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="element-name">SimpleHeaderConverter</span>()</div>
 </section>
 </li>
 </ul>
 </section>
 </li>
 <!-- ============ METHOD DETAIL ========== -->
 <li>
 <section class="method-details" id="method-detail">
 <h2>Method Details</h2>
 <ul class="member-list">
 <li>
 <section class="detail" id="version()">
 <h3>version</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></span>&nbsp;<span class="element-name">version</span>()</div>
 <div class="block"><span class="descfrm-type-label">Description copied from interface:&nbsp;<code><a href="../components/Versioned.html#version()">Versioned</a></code></span></div>
 <div class="block">Get the version of this component.</div>
 <dl class="notes">
 <dt>Specified by:</dt>
 <dd><code><a href="../components/Versioned.html#version()">version</a></code>&nbsp;in interface&nbsp;<code><a href="../components/Versioned.html" title="interface in org.apache.kafka.connect.components">Versioned</a></code></dd>
 <dt>Returns:</dt>
 <dd>the version, formatted as a String. The version may not be <code>null</code> or empty.</dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="config()">
 <h3>config</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="../../common/config/ConfigDef.html" title="class in org.apache.kafka.common.config">ConfigDef</a></span>&nbsp;<span class="element-name">config</span>()</div>
 <div class="block"><span class="descfrm-type-label">Description copied from interface:&nbsp;<code><a href="HeaderConverter.html#config()">HeaderConverter</a></code></span></div>
 <div class="block">Configuration specification for this set of header converters.</div>
 <dl class="notes">
 <dt>Specified by:</dt>
 <dd><code><a href="HeaderConverter.html#config()">config</a></code>&nbsp;in interface&nbsp;<code><a href="HeaderConverter.html" title="interface in org.apache.kafka.connect.storage">HeaderConverter</a></code></dd>
 <dt>Returns:</dt>
 <dd>the configuration specification; may not be null</dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="configure(java.util.Map)">
 <h3>configure</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">configure</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Map.html" title="class or interface in java.util" class="external-link">Map</a>&lt;<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>,<wbr>?&gt;&nbsp;configs)</span></div>
 <div class="block"><span class="descfrm-type-label">Description copied from interface:&nbsp;<code><a href="../../common/Configurable.html#configure(java.util.Map)">Configurable</a></code></span></div>
 <div class="block">Configure this class with the given key-value pairs</div>
 <dl class="notes">
 <dt>Specified by:</dt>
 <dd><code><a href="../../common/Configurable.html#configure(java.util.Map)">configure</a></code>&nbsp;in interface&nbsp;<code><a href="../../common/Configurable.html" title="interface in org.apache.kafka.common">Configurable</a></code></dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="toConnectHeader(java.lang.String,java.lang.String,byte[])">
 <h3>toConnectHeader</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="../data/SchemaAndValue.html" title="class in org.apache.kafka.connect.data">SchemaAndValue</a></span>&nbsp;<span class="element-name">toConnectHeader</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>&nbsp;topic,
  <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>&nbsp;headerKey,
  byte[]&nbsp;value)</span></div>
 <div class="block"><span class="descfrm-type-label">Description copied from interface:&nbsp;<code><a href="HeaderConverter.html#toConnectHeader(java.lang.String,java.lang.String,byte%5B%5D)">HeaderConverter</a></code></span></div>
 <div class="block">Convert the header name and byte array value into a <a href="../header/Header.html" title="interface in org.apache.kafka.connect.header"><code>Header</code></a> object.</div>
 <dl class="notes">
 <dt>Specified by:</dt>
 <dd><code><a href="HeaderConverter.html#toConnectHeader(java.lang.String,java.lang.String,byte%5B%5D)">toConnectHeader</a></code>&nbsp;in interface&nbsp;<code><a href="HeaderConverter.html" title="interface in org.apache.kafka.connect.storage">HeaderConverter</a></code></dd>
 <dt>Parameters:</dt>
 <dd><code>topic</code> - the name of the topic for the record containing the header</dd>
 <dd><code>headerKey</code> - the header's key; may not be null</dd>
 <dd><code>value</code> - the header's raw value; may be null</dd>
 <dt>Returns:</dt>
 <dd>the <a href="../data/SchemaAndValue.html" title="class in org.apache.kafka.connect.data"><code>SchemaAndValue</code></a>; may not be null</dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="fromConnectHeader(java.lang.String,java.lang.String,org.apache.kafka.connect.data.Schema,java.lang.Object)">
 <h3>fromConnectHeader</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">byte[]</span>&nbsp;<span class="element-name">fromConnectHeader</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>&nbsp;topic,
  <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>&nbsp;headerKey,
  <a href="../data/Schema.html" title="interface in org.apache.kafka.connect.data">Schema</a>&nbsp;schema,
  <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a>&nbsp;value)</span></div>
 <div class="block"><span class="descfrm-type-label">Description copied from interface:&nbsp;<code><a href="HeaderConverter.html#fromConnectHeader(java.lang.String,java.lang.String,org.apache.kafka.connect.data.Schema,java.lang.Object)">HeaderConverter</a></code></span></div>
 <div class="block">Convert the <a href="../header/Header.html" title="interface in org.apache.kafka.connect.header"><code>Header</code></a>'s <a href="../header/Header.html#value()"><code>value</code></a> into its byte array representation.</div>
 <dl class="notes">
 <dt>Specified by:</dt>
 <dd><code><a href="HeaderConverter.html#fromConnectHeader(java.lang.String,java.lang.String,org.apache.kafka.connect.data.Schema,java.lang.Object)">fromConnectHeader</a></code>&nbsp;in interface&nbsp;<code><a href="HeaderConverter.html" title="interface in org.apache.kafka.connect.storage">HeaderConverter</a></code></dd>
 <dt>Parameters:</dt>
 <dd><code>topic</code> - the name of the topic for the record containing the header</dd>
 <dd><code>headerKey</code> - the header's key; may not be null</dd>
 <dd><code>schema</code> - the schema for the header's value; may be null</dd>
 <dd><code>value</code> - the header's value to convert; may be null</dd>
 <dt>Returns:</dt>
 <dd>the byte array form of the Header's value; may be null if the value is null</dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="close()">
 <h3>close</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">close</span>()
            throws <span class="exceptions"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></span></div>
 <dl class="notes">
 <dt>Specified by:</dt>
 <dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/AutoCloseable.html#close()" title="class or interface in java.lang" class="external-link">close</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/AutoCloseable.html" title="class or interface in java.lang" class="external-link">AutoCloseable</a></code></dd>
 <dt>Specified by:</dt>
 <dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/Closeable.html#close()" title="class or interface in java.io" class="external-link">close</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/Closeable.html" title="class or interface in java.io" class="external-link">Closeable</a></code></dd>
 <dt>Throws:</dt>
 <dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></code></dd>
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