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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.log4j.rule</a></div> |
| <h2 title="Class ExpressionRule" class="title">Class ExpressionRule</h2> |
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| <li><a href="AbstractRule.html" title="class in org.apache.log4j.rule">org.apache.log4j.rule.AbstractRule</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.log4j.rule.ExpressionRule</li> |
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| <pre>public class <span class="typeNameLabel">ExpressionRule</span> |
| extends <a href="AbstractRule.html" title="class in org.apache.log4j.rule">AbstractRule</a></pre> |
| <div class="block">A Rule class supporting both infix and postfix expressions, |
| accepting any rule which |
| is supported by the <code>RuleFactory</code>. |
| |
| NOTE: parsing is supported through the use of |
| <code>StringTokenizer</code>, which |
| implies two limitations: |
| 1: all tokens in the expression must be separated by spaces, |
| including parenthesis |
| 2: operands which contain spaces MUST be wrapped in single quotes. |
| For example, the expression: |
| msg == 'some msg' |
| is a valid expression. |
| 3: To group expressions, use parentheses. |
| For example, the expression: |
| level >= INFO || ( msg == 'some msg' || logger == 'test' ) |
| is a valid expression. |
| See org.apache.log4j.rule.InFixToPostFix for a |
| description of supported operators. |
| See org.apache.log4j.spi.LoggingEventFieldResolver for field keywords.</div> |
| <dl> |
| <dt><span class="simpleTagLabel">Author:</span></dt> |
| <dd>Scott Deboy (sdeboy@apache.org)</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../serialized-form.html#org.apache.log4j.rule.ExpressionRule">Serialized Form</a></dd> |
| </dl> |
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| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colSecond" scope="col">Method</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#evaluate(org.apache.log4j.chainsaw.logevents.ChainsawLoggingEvent,java.util.Map)">evaluate</a></span>​(<a href="../chainsaw/logevents/ChainsawLoggingEvent.html" title="class in org.apache.log4j.chainsaw.logevents">ChainsawLoggingEvent</a> event, |
| <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Map.html?is-external=true" title="class or interface in java.util" class="externalLink">Map</a> matches)</code></th> |
| <td class="colLast"> |
| <div class="block">Returns true if this implementation of the rule accepts the LoggingEvent, |
| or false if not.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>static <a href="Rule.html" title="interface in org.apache.log4j.rule">Rule</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getRule(java.lang.String)">getRule</a></span>​(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a> expression)</code></th> |
| <td class="colLast"> |
| <div class="block">Get rule.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>static <a href="Rule.html" title="interface in org.apache.log4j.rule">Rule</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getRule(java.lang.String,boolean)">getRule</a></span>​(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a> expression, |
| boolean isPostFix)</code></th> |
| <td class="colLast"> |
| <div class="block">Get rule.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#toString()">toString</a></span>()</code></th> |
| </tr> |
| </table> |
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| </a> |
| <h3>Methods inherited from class org.apache.log4j.rule.<a href="AbstractRule.html" title="class in org.apache.log4j.rule">AbstractRule</a></h3> |
| <code><a href="AbstractRule.html#addPropertyChangeListener(java.beans.PropertyChangeListener)">addPropertyChangeListener</a>, <a href="AbstractRule.html#firePropertyChange(java.beans.PropertyChangeEvent)">firePropertyChange</a>, <a href="AbstractRule.html#firePropertyChange(java.lang.String,java.lang.Object,java.lang.Object)">firePropertyChange</a>, <a href="AbstractRule.html#removePropertyChangeListener(java.beans.PropertyChangeListener)">removePropertyChangeListener</a></code></li> |
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| </ul> |
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| <a id="getRule(java.lang.String)"> |
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| <h4>getRule</h4> |
| <pre class="methodSignature">public static <a href="Rule.html" title="interface in org.apache.log4j.rule">Rule</a> getRule​(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a> expression)</pre> |
| <div class="block">Get rule.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>expression</code> - expression.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>rule.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="getRule(java.lang.String,boolean)"> |
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| <h4>getRule</h4> |
| <pre class="methodSignature">public static <a href="Rule.html" title="interface in org.apache.log4j.rule">Rule</a> getRule​(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a> expression, |
| boolean isPostFix)</pre> |
| <div class="block">Get rule.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>expression</code> - expression.</dd> |
| <dd><code>isPostFix</code> - If post-fix.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>rule</dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>evaluate</h4> |
| <pre class="methodSignature">public boolean evaluate​(<a href="../chainsaw/logevents/ChainsawLoggingEvent.html" title="class in org.apache.log4j.chainsaw.logevents">ChainsawLoggingEvent</a> event, |
| <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Map.html?is-external=true" title="class or interface in java.util" class="externalLink">Map</a> matches)</pre> |
| <div class="block">Returns true if this implementation of the rule accepts the LoggingEvent, |
| or false if not. |
| |
| <p>What True/False means can be client-specific.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>event</code> - LoggingEvent this instance will evaluate</dd> |
| <dd><code>matches</code> - a Map of event field keys to Sets of matching strings (may be null) which will be |
| updated during execution of this method to include field and string matches based on the rule |
| evaluation results</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if this Rule instance accepts the event, otherwise false.</dd> |
| </dl> |
| </li> |
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| <h4>toString</h4> |
| <pre class="methodSignature">public <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a> toString()</pre> |
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