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<div class="subTitle">org.apache.logging.log4j.core</div>
<h2 title="Interface Layout" class="title">Interface Layout&lt;T extends <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>&gt;</h2>
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<dt><span class="paramLabel">Type Parameters:</span></dt>
<dd><code>T</code> - The <a href="https://docs.oracle.com/javase/8/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io"><code>Serializable</code></a> type returned by <a href="../../../../../org/apache/logging/log4j/core/Layout.html#toSerializable-org.apache.logging.log4j.core.LogEvent-"><code>toSerializable(LogEvent)</code></a></dd>
</dl>
<dl>
<dt>All Superinterfaces:</dt>
<dd><a href="../../../../../org/apache/logging/log4j/core/layout/Encoder.html" title="interface in org.apache.logging.log4j.core.layout">Encoder</a>&lt;<a href="../../../../../org/apache/logging/log4j/core/LogEvent.html" title="interface in org.apache.logging.log4j.core">LogEvent</a>&gt;</dd>
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<dl>
<dt>All Known Subinterfaces:</dt>
<dd><a href="../../../../../org/apache/logging/log4j/core/StringLayout.html" title="interface in org.apache.logging.log4j.core">StringLayout</a></dd>
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<dl>
<dt>All Known Implementing Classes:</dt>
<dd><a href="../../../../../org/apache/logging/log4j/core/layout/AbstractCsvLayout.html" title="class in org.apache.logging.log4j.core.layout">AbstractCsvLayout</a>, <a href="../../../../../org/apache/logging/log4j/core/layout/AbstractLayout.html" title="class in org.apache.logging.log4j.core.layout">AbstractLayout</a>, <a href="../../../../../org/apache/logging/log4j/core/layout/AbstractStringLayout.html" title="class in org.apache.logging.log4j.core.layout">AbstractStringLayout</a>, <a href="../../../../../org/apache/logging/log4j/core/layout/CsvLogEventLayout.html" title="class in org.apache.logging.log4j.core.layout">CsvLogEventLayout</a>, <a href="../../../../../org/apache/logging/log4j/core/layout/CsvParameterLayout.html" title="class in org.apache.logging.log4j.core.layout">CsvParameterLayout</a>, <a href="../../../../../org/apache/logging/log4j/core/layout/GelfLayout.html" title="class in org.apache.logging.log4j.core.layout">GelfLayout</a>, <a href="../../../../../org/apache/logging/log4j/core/layout/HtmlLayout.html" title="class in org.apache.logging.log4j.core.layout">HtmlLayout</a>, <a href="../../../../../org/apache/logging/log4j/core/layout/JsonLayout.html" title="class in org.apache.logging.log4j.core.layout">JsonLayout</a>, <a href="../../../../../org/apache/logging/log4j/core/layout/MessageLayout.html" title="class in org.apache.logging.log4j.core.layout">MessageLayout</a>, <a href="../../../../../org/apache/logging/log4j/core/layout/PatternLayout.html" title="class in org.apache.logging.log4j.core.layout">PatternLayout</a>, <a href="../../../../../org/apache/logging/log4j/core/layout/Rfc5424Layout.html" title="class in org.apache.logging.log4j.core.layout">Rfc5424Layout</a>, <a href="../../../../../org/apache/logging/log4j/core/layout/SerializedLayout.html" title="class in org.apache.logging.log4j.core.layout">SerializedLayout</a>, <a href="../../../../../org/apache/logging/log4j/core/layout/SyslogLayout.html" title="class in org.apache.logging.log4j.core.layout">SyslogLayout</a>, <a href="../../../../../org/apache/logging/log4j/core/layout/XmlLayout.html" title="class in org.apache.logging.log4j.core.layout">XmlLayout</a>, <a href="../../../../../org/apache/logging/log4j/core/layout/YamlLayout.html" title="class in org.apache.logging.log4j.core.layout">YamlLayout</a></dd>
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<pre>public interface <a href="../../../../../src-html/org/apache/logging/log4j/core/Layout.html#line.47">Layout</a>&lt;T extends <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>&gt;
extends <a href="../../../../../org/apache/logging/log4j/core/layout/Encoder.html" title="interface in org.apache.logging.log4j.core.layout">Encoder</a>&lt;<a href="../../../../../org/apache/logging/log4j/core/LogEvent.html" title="interface in org.apache.logging.log4j.core">LogEvent</a>&gt;</pre>
<div class="block">Lays out a <a href="../../../../../org/apache/logging/log4j/core/LogEvent.html" title="interface in org.apache.logging.log4j.core">LogEvent</a> in different formats.
The formats are:
<ul>
<li>
<code>byte[]</code></li>
<li>
an implementer of <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>, like <code>byte[]</code></li>
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<a href="../../../../../org/apache/logging/log4j/core/LogEvent.html" title="interface in org.apache.logging.log4j.core">LogEvent</a></li>
</ul>
<p>
Since 2.6, Layouts can <a href="../../../../../org/apache/logging/log4j/core/layout/Encoder.html#encode-T-org.apache.logging.log4j.core.layout.ByteBufferDestination-">encode</a> a <code>LogEvent</code> directly
to a <a href="../../../../../org/apache/logging/log4j/core/layout/ByteBufferDestination.html" title="interface in org.apache.logging.log4j.core.layout"><code>ByteBufferDestination</code></a> without creating temporary intermediary objects.
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/logging/log4j/core/Layout.html#ELEMENT_TYPE">ELEMENT_TYPE</a></span></code>
<div class="block">Main <a href="../../../../../org/apache/logging/log4j/core/config/plugins/Plugin.html#elementType--">plugin element type</a> for
Layout plugins.</div>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<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/logging/log4j/core/Layout.html#getContentFormat--">getContentFormat</a></span>()</code>
<div class="block">Returns a description of the content format.</div>
</td>
</tr>
<tr id="i1" 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/logging/log4j/core/Layout.html#getContentType--">getContentType</a></span>()</code>
<div class="block">Returns the content type output by this layout.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>byte[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/logging/log4j/core/Layout.html#getFooter--">getFooter</a></span>()</code>
<div class="block">Returns the format for the layout format.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>byte[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/logging/log4j/core/Layout.html#getHeader--">getHeader</a></span>()</code>
<div class="block">Returns the header for the layout format.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>byte[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/logging/log4j/core/Layout.html#toByteArray-org.apache.logging.log4j.core.LogEvent-">toByteArray</a></span>(<a href="../../../../../org/apache/logging/log4j/core/LogEvent.html" title="interface in org.apache.logging.log4j.core">LogEvent</a>&nbsp;event)</code>
<div class="block">Formats the event suitable for display.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code><a href="../../../../../org/apache/logging/log4j/core/Layout.html" title="type parameter in Layout">T</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/logging/log4j/core/Layout.html#toSerializable-org.apache.logging.log4j.core.LogEvent-">toSerializable</a></span>(<a href="../../../../../org/apache/logging/log4j/core/LogEvent.html" title="interface in org.apache.logging.log4j.core">LogEvent</a>&nbsp;event)</code>
<div class="block">Formats the event as an Object that can be serialized.</div>
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<h3>Methods inherited from interface&nbsp;org.apache.logging.log4j.core.layout.<a href="../../../../../org/apache/logging/log4j/core/layout/Encoder.html" title="interface in org.apache.logging.log4j.core.layout">Encoder</a></h3>
<code><a href="../../../../../org/apache/logging/log4j/core/layout/Encoder.html#encode-T-org.apache.logging.log4j.core.layout.ByteBufferDestination-">encode</a></code></li>
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<h4>ELEMENT_TYPE</h4>
<pre>static final&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> <a href="../../../../../src-html/org/apache/logging/log4j/core/Layout.html#line.55">ELEMENT_TYPE</a></pre>
<div class="block">Main <a href="../../../../../org/apache/logging/log4j/core/config/plugins/Plugin.html#elementType--">plugin element type</a> for
Layout plugins.</div>
<dl>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>2.1</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../constant-values.html#org.apache.logging.log4j.core.Layout.ELEMENT_TYPE">Constant Field Values</a></dd>
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<h4>getFooter</h4>
<pre>byte[]&nbsp;<a href="../../../../../src-html/org/apache/logging/log4j/core/Layout.html#line.61">getFooter</a>()</pre>
<div class="block">Returns the format for the layout format.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The footer.</dd>
</dl>
</li>
</ul>
<a name="getHeader--">
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</a>
<ul class="blockList">
<li class="blockList">
<h4>getHeader</h4>
<pre>byte[]&nbsp;<a href="../../../../../src-html/org/apache/logging/log4j/core/Layout.html#line.67">getHeader</a>()</pre>
<div class="block">Returns the header for the layout format.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The header.</dd>
</dl>
</li>
</ul>
<a name="toByteArray-org.apache.logging.log4j.core.LogEvent-">
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</a>
<ul class="blockList">
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<h4>toByteArray</h4>
<pre>byte[]&nbsp;<a href="../../../../../src-html/org/apache/logging/log4j/core/Layout.html#line.75">toByteArray</a>(<a href="../../../../../org/apache/logging/log4j/core/LogEvent.html" title="interface in org.apache.logging.log4j.core">LogEvent</a>&nbsp;event)</pre>
<div class="block">Formats the event suitable for display.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>event</code> - The Logging Event.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The formatted event.</dd>
</dl>
</li>
</ul>
<a name="toSerializable-org.apache.logging.log4j.core.LogEvent-">
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<ul class="blockList">
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<h4>toSerializable</h4>
<pre><a href="../../../../../org/apache/logging/log4j/core/Layout.html" title="type parameter in Layout">T</a>&nbsp;<a href="../../../../../src-html/org/apache/logging/log4j/core/Layout.html#line.83">toSerializable</a>(<a href="../../../../../org/apache/logging/log4j/core/LogEvent.html" title="interface in org.apache.logging.log4j.core">LogEvent</a>&nbsp;event)</pre>
<div class="block">Formats the event as an Object that can be serialized.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>event</code> - The Logging Event.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The formatted event.</dd>
</dl>
</li>
</ul>
<a name="getContentType--">
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<h4>getContentType</h4>
<pre><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;<a href="../../../../../src-html/org/apache/logging/log4j/core/Layout.html#line.90">getContentType</a>()</pre>
<div class="block">Returns the content type output by this layout. The base class returns "text/plain".</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the content type.</dd>
</dl>
</li>
</ul>
<a name="getContentFormat--">
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</a>
<ul class="blockListLast">
<li class="blockList">
<h4>getContentFormat</h4>
<pre><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;<a href="../../../../../src-html/org/apache/logging/log4j/core/Layout.html#line.98">getContentFormat</a>()</pre>
<div class="block">Returns a description of the content format.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a Map of key/value pairs describing the Layout-specific content format, or an empty Map if no content
format descriptors are specified.</dd>
</dl>
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