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<div class="subTitle">org.apache.log4j.rewrite</div>
<h2 title="Class MapRewritePolicy" class="title">Class MapRewritePolicy</h2>
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<dd><a href="../../../../org/apache/log4j/rewrite/RewritePolicy.html" title="interface in org.apache.log4j.rewrite">RewritePolicy</a></dd>
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<pre>public class <span class="typeNameLabel">MapRewritePolicy</span>
extends <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>
implements <a href="../../../../org/apache/log4j/rewrite/RewritePolicy.html" title="interface in org.apache.log4j.rewrite">RewritePolicy</a></pre>
<div class="block">This policy rewrites events where the message of the
original event implementes java.util.Map.
All other events are passed through unmodified.
If the map contains a "message" entry, the value will be
used as the message for the rewritten event. The rewritten
event will have a property set that is the combination of the
original property set and the other members of the message map.
If both the original property set and the message map
contain the same entry, the value from the message map
will overwrite the original property set.
The combination of the RewriteAppender and this policy
performs the same actions as the MapFilter from log4j 1.3.</div>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/log4j/rewrite/MapRewritePolicy.html#MapRewritePolicy--">MapRewritePolicy</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>org.apache.log4j.spi.LoggingEvent</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/log4j/rewrite/MapRewritePolicy.html#rewrite-org.apache.log4j.spi.LoggingEvent-">rewrite</a></span>(org.apache.log4j.spi.LoggingEvent&nbsp;source)</code>
<div class="block">Rewrite a logging event.</div>
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<pre>public&nbsp;MapRewritePolicy()</pre>
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<pre>public&nbsp;org.apache.log4j.spi.LoggingEvent&nbsp;rewrite(org.apache.log4j.spi.LoggingEvent&nbsp;source)</pre>
<div class="block">Rewrite a logging event.</div>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../org/apache/log4j/rewrite/RewritePolicy.html#rewrite-org.apache.log4j.spi.LoggingEvent-">rewrite</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../org/apache/log4j/rewrite/RewritePolicy.html" title="interface in org.apache.log4j.rewrite">RewritePolicy</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>source</code> - a logging event that may be returned or
used to create a new logging event.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a logging event or null to suppress processing.</dd>
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