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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.log4j.chainsaw.help</a></div>
<h2 title="Class HelpManager" class="title">Class HelpManager</h2>
</div>
<div class="contentContainer">
<ul class="inheritance">
<li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">java.lang.Object</a></li>
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<pre>public final class <span class="typeNameLabel">HelpManager</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" class="externalLink">Object</a></pre>
<div class="block">Singleton help manager where objects can register to display
Help for something, an independant viewer can register to
be notified when the requested Help URL changes and can display
it appropriately. This class effectively decouples the help requester
from the help implementation (if any!)</div>
<dl>
<dt><span class="simpleTagLabel">Author:</span></dt>
<dd>Paul Smith &lt;psmith@apache.org&gt;</dd>
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<h3>Method Summary</h3>
<table class="memberSummary">
<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
<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>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#addPropertyChangeListener(java.beans.PropertyChangeListener)">addPropertyChangeListener</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/beans/PropertyChangeListener.html?is-external=true" title="class or interface in java.beans" class="externalLink">PropertyChangeListener</a>&nbsp;listener)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#addPropertyChangeListener(java.lang.String,java.beans.PropertyChangeListener)">addPropertyChangeListener</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;propertyName,
<a href="https://docs.oracle.com/javase/8/docs/api/java/beans/PropertyChangeListener.html?is-external=true" title="class or interface in java.beans" class="externalLink">PropertyChangeListener</a>&nbsp;listener)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#firePropertyChange(java.beans.PropertyChangeEvent)">firePropertyChange</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/beans/PropertyChangeEvent.html?is-external=true" title="class or interface in java.beans" class="externalLink">PropertyChangeEvent</a>&nbsp;evt)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#firePropertyChange(java.lang.String,boolean,boolean)">firePropertyChange</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;propertyName,
boolean&nbsp;oldValue,
boolean&nbsp;newValue)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#firePropertyChange(java.lang.String,int,int)">firePropertyChange</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;propertyName,
int&nbsp;oldValue,
int&nbsp;newValue)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#firePropertyChange(java.lang.String,java.lang.Object,java.lang.Object)">firePropertyChange</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;propertyName,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;oldValue,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;newValue)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/net/URL.html?is-external=true" title="class or interface in java.net" class="externalLink">URL</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getHelpForClass(java.lang.Class)">getHelpForClass</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>&nbsp;c)</code></th>
<td class="colLast">
<div class="block">Determines the most appropriate Help resource for a particular class
or returns ChainsawConstants.URL_PAGE_NOT_FOUND if there is no resource located.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>static <a href="HelpManager.html" title="class in org.apache.log4j.chainsaw.help">HelpManager</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getInstance()">getInstance</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#removePropertyChangeListener(java.beans.PropertyChangeListener)">removePropertyChangeListener</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/beans/PropertyChangeListener.html?is-external=true" title="class or interface in java.beans" class="externalLink">PropertyChangeListener</a>&nbsp;listener)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#removePropertyChangeListener(java.lang.String,java.beans.PropertyChangeListener)">removePropertyChangeListener</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;propertyName,
<a href="https://docs.oracle.com/javase/8/docs/api/java/beans/PropertyChangeListener.html?is-external=true" title="class or interface in java.beans" class="externalLink">PropertyChangeListener</a>&nbsp;listener)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#setHelpURL(java.net.URL)">setHelpURL</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/net/URL.html?is-external=true" title="class or interface in java.net" class="externalLink">URL</a>&nbsp;helpURL)</code></th>
<td class="colLast">
<div class="block">The current Help URL that should be displayed, and is
a PropertyChangeListener supported property.</div>
</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#showHelpForClass(java.lang.Class)">showHelpForClass</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>&nbsp;c)</code></th>
<td class="colLast">
<div class="block">Given a class, and that it belongs within the org.apache.log4j project,
sets the URL to the JavaDoc for that class.</div>
</td>
</tr>
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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" class="externalLink">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" class="externalLink">clone</a>, <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" class="externalLink">equals</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" class="externalLink">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" class="externalLink">getClass</a>, <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" class="externalLink">hashCode</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" class="externalLink">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" class="externalLink">notifyAll</a>, <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" class="externalLink">toString</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" class="externalLink">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" class="externalLink">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" class="externalLink">wait</a></code></li>
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<h3>Method Detail</h3>
<a id="setHelpURL(java.net.URL)">
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<h4>setHelpURL</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;setHelpURL&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/net/URL.html?is-external=true" title="class or interface in java.net" class="externalLink">URL</a>&nbsp;helpURL)</pre>
<div class="block">The current Help URL that should be displayed, and is
a PropertyChangeListener supported property.
<p>
This method ALWAYS fires property change events
even if the value is the same (the oldvalue
of the event will be null)</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>helpURL</code> - </dd>
</dl>
</li>
</ul>
<a id="addPropertyChangeListener(java.beans.PropertyChangeListener)">
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<h4>addPropertyChangeListener</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;addPropertyChangeListener&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/beans/PropertyChangeListener.html?is-external=true" title="class or interface in java.beans" class="externalLink">PropertyChangeListener</a>&nbsp;listener)</pre>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>listener</code> - </dd>
</dl>
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<h4>addPropertyChangeListener</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;addPropertyChangeListener&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;propertyName,
<a href="https://docs.oracle.com/javase/8/docs/api/java/beans/PropertyChangeListener.html?is-external=true" title="class or interface in java.beans" class="externalLink">PropertyChangeListener</a>&nbsp;listener)</pre>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>propertyName</code> - </dd>
<dd><code>listener</code> - </dd>
</dl>
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<h4>firePropertyChange</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;firePropertyChange&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/beans/PropertyChangeEvent.html?is-external=true" title="class or interface in java.beans" class="externalLink">PropertyChangeEvent</a>&nbsp;evt)</pre>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>evt</code> - </dd>
</dl>
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<h4>firePropertyChange</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;firePropertyChange&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;propertyName,
boolean&nbsp;oldValue,
boolean&nbsp;newValue)</pre>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>propertyName</code> - </dd>
<dd><code>oldValue</code> - </dd>
<dd><code>newValue</code> - </dd>
</dl>
</li>
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<h4>firePropertyChange</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;firePropertyChange&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;propertyName,
int&nbsp;oldValue,
int&nbsp;newValue)</pre>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>propertyName</code> - </dd>
<dd><code>oldValue</code> - </dd>
<dd><code>newValue</code> - </dd>
</dl>
</li>
</ul>
<a id="firePropertyChange(java.lang.String,java.lang.Object,java.lang.Object)">
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<h4>firePropertyChange</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;firePropertyChange&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;propertyName,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;oldValue,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;newValue)</pre>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>propertyName</code> - </dd>
<dd><code>oldValue</code> - </dd>
<dd><code>newValue</code> - </dd>
</dl>
</li>
</ul>
<a id="removePropertyChangeListener(java.beans.PropertyChangeListener)">
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<h4>removePropertyChangeListener</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;removePropertyChangeListener&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/beans/PropertyChangeListener.html?is-external=true" title="class or interface in java.beans" class="externalLink">PropertyChangeListener</a>&nbsp;listener)</pre>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>listener</code> - </dd>
</dl>
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<h4>removePropertyChangeListener</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;removePropertyChangeListener&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;propertyName,
<a href="https://docs.oracle.com/javase/8/docs/api/java/beans/PropertyChangeListener.html?is-external=true" title="class or interface in java.beans" class="externalLink">PropertyChangeListener</a>&nbsp;listener)</pre>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>propertyName</code> - </dd>
<dd><code>listener</code> - </dd>
</dl>
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<h4>getInstance</h4>
<pre class="methodSignature">public static&nbsp;<a href="HelpManager.html" title="class in org.apache.log4j.chainsaw.help">HelpManager</a>&nbsp;getInstance()</pre>
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<h4>showHelpForClass</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;showHelpForClass&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>&nbsp;c)</pre>
<div class="block">Given a class, and that it belongs within the org.apache.log4j project,
sets the URL to the JavaDoc for that class.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>c</code> - </dd>
</dl>
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<a id="getHelpForClass(java.lang.Class)">
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<h4>getHelpForClass</h4>
<pre class="methodSignature">public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/net/URL.html?is-external=true" title="class or interface in java.net" class="externalLink">URL</a>&nbsp;getHelpForClass&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>&nbsp;c)</pre>
<div class="block">Determines the most appropriate Help resource for a particular class
or returns ChainsawConstants.URL_PAGE_NOT_FOUND if there is no resource located.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>URL</dd>
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