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<h2 title="Class AbstractDataset" class="title">Class AbstractDataset</h2>
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<li>java.lang.Object</li>
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<dt>All Implemented Interfaces:</dt>
<dd>java.io.ObjectInputValidation, java.io.Serializable, java.lang.Cloneable, <a href="../../../../org/jfree/data/general/Dataset.html" title="interface in org.jfree.data.general">Dataset</a></dd>
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<dl>
<dt>Direct Known Subclasses:</dt>
<dd><a href="../../../../org/jfree/data/general/AbstractSeriesDataset.html" title="class in org.jfree.data.general">AbstractSeriesDataset</a>, <a href="../../../../org/jfree/data/category/CategoryToPieDataset.html" title="class in org.jfree.data.category">CategoryToPieDataset</a>, <a href="../../../../org/jfree/data/statistics/DefaultBoxAndWhiskerCategoryDataset.html" title="class in org.jfree.data.statistics">DefaultBoxAndWhiskerCategoryDataset</a>, <a href="../../../../org/jfree/data/category/DefaultCategoryDataset.html" title="class in org.jfree.data.category">DefaultCategoryDataset</a>, <a href="../../../../org/jfree/data/general/DefaultHeatMapDataset.html" title="class in org.jfree.data.general">DefaultHeatMapDataset</a>, <a href="../../../../org/jfree/data/general/DefaultKeyedValueDataset.html" title="class in org.jfree.data.general">DefaultKeyedValueDataset</a>, <a href="../../../../org/jfree/data/statistics/DefaultMultiValueCategoryDataset.html" title="class in org.jfree.data.statistics">DefaultMultiValueCategoryDataset</a>, <a href="../../../../org/jfree/data/general/DefaultPieDataset.html" title="class in org.jfree.data.general">DefaultPieDataset</a>, <a href="../../../../org/jfree/data/statistics/DefaultStatisticalCategoryDataset.html" title="class in org.jfree.data.statistics">DefaultStatisticalCategoryDataset</a>, <a href="../../../../org/jfree/data/general/DefaultValueDataset.html" title="class in org.jfree.data.general">DefaultValueDataset</a>, <a href="../../../../org/jfree/data/category/SlidingCategoryDataset.html" title="class in org.jfree.data.category">SlidingCategoryDataset</a>, <a href="../../../../org/jfree/data/gantt/SlidingGanttCategoryDataset.html" title="class in org.jfree.data.gantt">SlidingGanttCategoryDataset</a>, <a href="../../../../org/jfree/data/general/WaferMapDataset.html" title="class in org.jfree.data.general">WaferMapDataset</a></dd>
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<pre>public abstract class <a href="../../../../src-html/org/jfree/data/general/AbstractDataset.html#line.80">AbstractDataset</a>
extends java.lang.Object
implements <a href="../../../../org/jfree/data/general/Dataset.html" title="interface in org.jfree.data.general">Dataset</a>, java.lang.Cloneable, java.io.Serializable, java.io.ObjectInputValidation</pre>
<div class="block">An abstract implementation of the <a href="../../../../org/jfree/data/general/Dataset.html" title="interface in org.jfree.data.general"><code>Dataset</code></a> interface, containing a
 mechanism for registering change listeners.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../serialized-form.html#org.jfree.data.general.AbstractDataset">Serialized Form</a></dd>
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<caption><span>Constructors</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colFirst" scope="col">Modifier</th>
<th class="colLast" scope="col">Constructor and Description</th>
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<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/jfree/data/general/AbstractDataset.html#AbstractDataset--">AbstractDataset</a></span>()</code>
<div class="block">Constructs a dataset.</div>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/jfree/data/general/AbstractDataset.html#addChangeListener-org.jfree.data.general.DatasetChangeListener-">addChangeListener</a></span>(<a href="../../../../org/jfree/data/general/DatasetChangeListener.html" title="interface in org.jfree.data.general">DatasetChangeListener</a>&nbsp;listener)</code>
<div class="block">Registers an object to receive notification of changes to the dataset.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>java.lang.Object</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/jfree/data/general/AbstractDataset.html#clone--">clone</a></span>()</code>
<div class="block">Returns a clone of the dataset.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/jfree/data/general/AbstractDataset.html#fireDatasetChanged--">fireDatasetChanged</a></span>()</code>
<div class="block">Notifies all registered listeners that the dataset has changed, 
 provided that the <code>notify</code> flag has not been set to 
 <code>false</code>.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code><a href="../../../../org/jfree/data/general/DatasetGroup.html" title="class in org.jfree.data.general">DatasetGroup</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/jfree/data/general/AbstractDataset.html#getGroup--">getGroup</a></span>()</code>
<div class="block">Returns the dataset group for the dataset.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/jfree/data/general/AbstractDataset.html#getNotify--">getNotify</a></span>()</code>
<div class="block">Returns the value of the notify flag.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/jfree/data/general/AbstractDataset.html#hasListener-java.util.EventListener-">hasListener</a></span>(java.util.EventListener&nbsp;listener)</code>
<div class="block">Returns <code>true</code> if the specified object is registered with
 the dataset as a listener.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/jfree/data/general/AbstractDataset.html#notifyListeners-org.jfree.data.general.DatasetChangeEvent-">notifyListeners</a></span>(<a href="../../../../org/jfree/data/general/DatasetChangeEvent.html" title="class in org.jfree.data.general">DatasetChangeEvent</a>&nbsp;event)</code>
<div class="block">Notifies all registered listeners that the dataset has changed.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/jfree/data/general/AbstractDataset.html#removeChangeListener-org.jfree.data.general.DatasetChangeListener-">removeChangeListener</a></span>(<a href="../../../../org/jfree/data/general/DatasetChangeListener.html" title="interface in org.jfree.data.general">DatasetChangeListener</a>&nbsp;listener)</code>
<div class="block">Deregisters an object so that it no longer receives notification of
 changes to the dataset.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/jfree/data/general/AbstractDataset.html#setGroup-org.jfree.data.general.DatasetGroup-">setGroup</a></span>(<a href="../../../../org/jfree/data/general/DatasetGroup.html" title="class in org.jfree.data.general">DatasetGroup</a>&nbsp;group)</code>
<div class="block">Sets the dataset group for the dataset.</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/jfree/data/general/AbstractDataset.html#setNotify-boolean-">setNotify</a></span>(boolean&nbsp;notify)</code>
<div class="block">Sets the notify flag, which controls whether or not the <a href="../../../../org/jfree/data/general/AbstractDataset.html#fireDatasetChanged--"><code>fireDatasetChanged()</code></a>
 method notifies listeners.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/jfree/data/general/AbstractDataset.html#validateObject--">validateObject</a></span>()</code>
<div class="block">Validates the object.</div>
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<h3>Methods inherited from class&nbsp;java.lang.Object</h3>
<code>equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
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<h3>Constructor Detail</h3>
<a name="AbstractDataset--">
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<h4>AbstractDataset</h4>
<pre>protected&nbsp;<a href="../../../../src-html/org/jfree/data/general/AbstractDataset.html#line.102">AbstractDataset</a>()</pre>
<div class="block">Constructs a dataset. By default, the dataset is assigned to its own
 group.</div>
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<h3>Method Detail</h3>
<a name="getGroup--">
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<h4>getGroup</h4>
<pre>public&nbsp;<a href="../../../../org/jfree/data/general/DatasetGroup.html" title="class in org.jfree.data.general">DatasetGroup</a>&nbsp;<a href="../../../../src-html/org/jfree/data/general/AbstractDataset.html#line.116">getGroup</a>()</pre>
<div class="block">Returns the dataset group for the dataset.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../org/jfree/data/general/Dataset.html#getGroup--">getGroup</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../org/jfree/data/general/Dataset.html" title="interface in org.jfree.data.general">Dataset</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The group (never <code>null</code>).</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../org/jfree/data/general/AbstractDataset.html#setGroup-org.jfree.data.general.DatasetGroup-"><code>setGroup(DatasetGroup)</code></a></dd>
</dl>
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<h4>setGroup</h4>
<pre>public&nbsp;void&nbsp;<a href="../../../../src-html/org/jfree/data/general/AbstractDataset.html#line.128">setGroup</a>(<a href="../../../../org/jfree/data/general/DatasetGroup.html" title="class in org.jfree.data.general">DatasetGroup</a>&nbsp;group)</pre>
<div class="block">Sets the dataset group for the dataset.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../org/jfree/data/general/Dataset.html#setGroup-org.jfree.data.general.DatasetGroup-">setGroup</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../org/jfree/data/general/Dataset.html" title="interface in org.jfree.data.general">Dataset</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>group</code> - the group (<code>null</code> not permitted).</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../org/jfree/data/general/AbstractDataset.html#getGroup--"><code>getGroup()</code></a></dd>
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<a name="getNotify--">
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<h4>getNotify</h4>
<pre>public&nbsp;boolean&nbsp;<a href="../../../../src-html/org/jfree/data/general/AbstractDataset.html#line.143">getNotify</a>()</pre>
<div class="block">Returns the value of the notify flag.  The default value is 
 <code>true</code>.  If this is <code>false</code>, calls to the 
 <a href="../../../../org/jfree/data/general/AbstractDataset.html#fireDatasetChanged--"><code>fireDatasetChanged()</code></a> method will NOT trigger a dataset
 change event.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>A boolean.</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>1.0.17</dd>
</dl>
</li>
</ul>
<a name="setNotify-boolean-">
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<h4>setNotify</h4>
<pre>public&nbsp;void&nbsp;<a href="../../../../src-html/org/jfree/data/general/AbstractDataset.html#line.157">setNotify</a>(boolean&nbsp;notify)</pre>
<div class="block">Sets the notify flag, which controls whether or not the <a href="../../../../org/jfree/data/general/AbstractDataset.html#fireDatasetChanged--"><code>fireDatasetChanged()</code></a>
 method notifies listeners.  Setting this flag to <code>true</code> will
 trigger a <code>DatasetChangeEvent</code> because there may be 
 queued up changes.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>notify</code> - the new flag value.</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>1.0.17</dd>
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</ul>
<a name="addChangeListener-org.jfree.data.general.DatasetChangeListener-">
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<h4>addChangeListener</h4>
<pre>public&nbsp;void&nbsp;<a href="../../../../src-html/org/jfree/data/general/AbstractDataset.html#line.172">addChangeListener</a>(<a href="../../../../org/jfree/data/general/DatasetChangeListener.html" title="interface in org.jfree.data.general">DatasetChangeListener</a>&nbsp;listener)</pre>
<div class="block">Registers an object to receive notification of changes to the dataset.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../org/jfree/data/general/Dataset.html#addChangeListener-org.jfree.data.general.DatasetChangeListener-">addChangeListener</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../org/jfree/data/general/Dataset.html" title="interface in org.jfree.data.general">Dataset</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>listener</code> - the object to register.</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../org/jfree/data/general/AbstractDataset.html#removeChangeListener-org.jfree.data.general.DatasetChangeListener-"><code>removeChangeListener(DatasetChangeListener)</code></a></dd>
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<h4>removeChangeListener</h4>
<pre>public&nbsp;void&nbsp;<a href="../../../../src-html/org/jfree/data/general/AbstractDataset.html#line.185">removeChangeListener</a>(<a href="../../../../org/jfree/data/general/DatasetChangeListener.html" title="interface in org.jfree.data.general">DatasetChangeListener</a>&nbsp;listener)</pre>
<div class="block">Deregisters an object so that it no longer receives notification of
 changes to the dataset.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../org/jfree/data/general/Dataset.html#removeChangeListener-org.jfree.data.general.DatasetChangeListener-">removeChangeListener</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../org/jfree/data/general/Dataset.html" title="interface in org.jfree.data.general">Dataset</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>listener</code> - the object to deregister.</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../org/jfree/data/general/AbstractDataset.html#addChangeListener-org.jfree.data.general.DatasetChangeListener-"><code>addChangeListener(DatasetChangeListener)</code></a></dd>
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<h4>hasListener</h4>
<pre>public&nbsp;boolean&nbsp;<a href="../../../../src-html/org/jfree/data/general/AbstractDataset.html#line.201">hasListener</a>(java.util.EventListener&nbsp;listener)</pre>
<div class="block">Returns <code>true</code> if the specified object is registered with
 the dataset as a listener.  Most applications won't need to call this
 method, it exists mainly for use by unit testing code.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>listener</code> - the listener.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>A boolean.</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../org/jfree/data/general/AbstractDataset.html#addChangeListener-org.jfree.data.general.DatasetChangeListener-"><code>addChangeListener(DatasetChangeListener)</code></a>, 
<a href="../../../../org/jfree/data/general/AbstractDataset.html#removeChangeListener-org.jfree.data.general.DatasetChangeListener-"><code>removeChangeListener(DatasetChangeListener)</code></a></dd>
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<h4>fireDatasetChanged</h4>
<pre>protected&nbsp;void&nbsp;<a href="../../../../src-html/org/jfree/data/general/AbstractDataset.html#line.213">fireDatasetChanged</a>()</pre>
<div class="block">Notifies all registered listeners that the dataset has changed, 
 provided that the <code>notify</code> flag has not been set to 
 <code>false</code>.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../org/jfree/data/general/AbstractDataset.html#addChangeListener-org.jfree.data.general.DatasetChangeListener-"><code>addChangeListener(DatasetChangeListener)</code></a></dd>
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<h4>notifyListeners</h4>
<pre>protected&nbsp;void&nbsp;<a href="../../../../src-html/org/jfree/data/general/AbstractDataset.html#line.228">notifyListeners</a>(<a href="../../../../org/jfree/data/general/DatasetChangeEvent.html" title="class in org.jfree.data.general">DatasetChangeEvent</a>&nbsp;event)</pre>
<div class="block">Notifies all registered listeners that the dataset has changed.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>event</code> - contains information about the event that triggered the
               notification.</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../org/jfree/data/general/AbstractDataset.html#addChangeListener-org.jfree.data.general.DatasetChangeListener-"><code>addChangeListener(DatasetChangeListener)</code></a>, 
<a href="../../../../org/jfree/data/general/AbstractDataset.html#removeChangeListener-org.jfree.data.general.DatasetChangeListener-"><code>removeChangeListener(DatasetChangeListener)</code></a></dd>
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<h4>clone</h4>
<pre>public&nbsp;java.lang.Object&nbsp;<a href="../../../../src-html/org/jfree/data/general/AbstractDataset.html#line.249">clone</a>()
                       throws java.lang.CloneNotSupportedException</pre>
<div class="block">Returns a clone of the dataset. The cloned dataset will NOT include the
 <a href="../../../../org/jfree/data/general/DatasetChangeListener.html" title="interface in org.jfree.data.general"><code>DatasetChangeListener</code></a> references that have been registered with
 this dataset.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>clone</code>&nbsp;in class&nbsp;<code>java.lang.Object</code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>A clone.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.lang.CloneNotSupportedException</code> - if the dataset does not support
                                     cloning.</dd>
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<h4>validateObject</h4>
<pre>public&nbsp;void&nbsp;<a href="../../../../src-html/org/jfree/data/general/AbstractDataset.html#line.300">validateObject</a>()
                    throws java.io.InvalidObjectException</pre>
<div class="block">Validates the object. We use this opportunity to call listeners who have
 registered during the deserialization process, as listeners are not
 serialized. This method is called by the serialization system after the
 entire graph is read.

 This object has registered itself to the system with a priority of 10.
 Other callbacks may register with a higher priority number to be called
 before this object, or with a lower priority number to be called after
 the listeners were notified.

 All listeners are supposed to have register by now, either in their
 readObject or validateObject methods. Notify them that this dataset has
 changed.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>validateObject</code>&nbsp;in interface&nbsp;<code>java.io.ObjectInputValidation</code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.io.InvalidObjectException</code> - If the object cannot validate itself.</dd>
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