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<div class="subTitle">org.apache.commons.beanutils</div>
<h2 title="Class BeanPropertyValueEqualsPredicate" class="title">Class BeanPropertyValueEqualsPredicate</h2>
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<ul class="inheritance">
<li><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li>
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<li>org.apache.commons.beanutils.BeanPropertyValueEqualsPredicate</li>
</ul>
</li>
</ul>
<div class="description">
<ul class="blockList">
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<dl>
<dt>All Implemented Interfaces:</dt>
<dd>org.apache.commons.collections.Predicate</dd>
</dl>
<hr>
<br>
<pre>public class <span class="typeNameLabel">BeanPropertyValueEqualsPredicate</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 org.apache.commons.collections.Predicate</pre>
<div class="block"><p><code>Predicate</code> that evaluates a property value against a specified value.</p>
<p>
An implementation of <code>org.apache.commons.collections.Predicate</code> that evaluates a
property value on the object provided against a specified value and returns <code>true</code>
if equal; <code>false</code> otherwise.
The <code>BeanPropertyValueEqualsPredicate</code> constructor takes two parameters which
determine what property will be evaluated on the target object and what its expected value should
be.
<dl>
<dt>
<strong><code>
<pre>public BeanPropertyValueEqualsPredicate( String propertyName, Object propertyValue )</pre>
</code></strong>
</dt>
<dd>
Will create a <code>Predicate</code> that will evaluate the target object and return
<code>true</code> if the property specified by <code>propertyName</code> has a value which
is equal to the the value specified by <code>propertyValue</code>. Or return
<code>false</code> otherwise.
</dd>
</dl>
</p>
<p>
<strong>Note:</strong> Property names can be a simple, nested, indexed, or mapped property as defined by
<code>org.apache.commons.beanutils.PropertyUtils</code>. If any object in the property path
specified by <code>propertyName</code> is <code>null</code> then the outcome is based on the
value of the <code>ignoreNull</code> attribute.
</p>
<p>
A typical usage might look like:
<code><pre>
// create the closure
BeanPropertyValueEqualsPredicate predicate =
new BeanPropertyValueEqualsPredicate( "activeEmployee", Boolean.FALSE );
// filter the Collection
CollectionUtils.filter( peopleCollection, predicate );
</pre></code>
</p>
<p>
This would take a <code>Collection</code> of person objects and filter out any people whose
<code>activeEmployee</code> property is <code>false</code>. Assuming...
<ul>
<li>
The top level object in the <code>peeopleCollection</code> is an object which represents a
person.
</li>
<li>
The person object has a <code>getActiveEmployee()</code> method which returns
the boolean value for the object's <code>activeEmployee</code> property.
</li>
</ul>
</p>
<p>
Another typical usage might look like:
<code><pre>
// create the closure
BeanPropertyValueEqualsPredicate predicate =
new BeanPropertyValueEqualsPredicate( "personId", "456-12-1234" );
// search the Collection
CollectionUtils.find( peopleCollection, predicate );
</pre></code>
</p>
<p>
This would search a <code>Collection</code> of person objects and return the first object whose
<code>personId</code> property value equals <code>456-12-1234</code>. Assuming...
<ul>
<li>
The top level object in the <code>peeopleCollection</code> is an object which represents a
person.
</li>
<li>
The person object has a <code>getPersonId()</code> method which returns
the value for the object's <code>personId</code> property.
</li>
</ul>
</p></div>
<dl>
<dt><span class="simpleTagLabel">Version:</span></dt>
<dd>$Id: BeanPropertyValueEqualsPredicate.java 1632171 2014-10-15 20:15:17Z ggregory $</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../org/apache/commons/beanutils/PropertyUtils.html" title="class in org.apache.commons.beanutils"><code>PropertyUtils</code></a>,
<code>Predicate</code></dd>
</dl>
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<th class="colOne" scope="col">Constructor and Description</th>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/beanutils/BeanPropertyValueEqualsPredicate.html#BeanPropertyValueEqualsPredicate-java.lang.String-java.lang.Object-">BeanPropertyValueEqualsPredicate</a></span>(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> propertyName,
<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> propertyValue)</code>
<div class="block">Constructor which takes the name of the property, its expected value to be used in evaluation,
and assumes <code>ignoreNull</code> to be <code>false</code>.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/beanutils/BeanPropertyValueEqualsPredicate.html#BeanPropertyValueEqualsPredicate-java.lang.String-java.lang.Object-boolean-">BeanPropertyValueEqualsPredicate</a></span>(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> propertyName,
<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> propertyValue,
boolean ignoreNull)</code>
<div class="block">Constructor which takes the name of the property, its expected value
to be used in evaluation, and a boolean which determines whether <code>null</code> objects in
the property path will genenerate an <code>IllegalArgumentException</code> or not.</div>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/beanutils/BeanPropertyValueEqualsPredicate.html#evaluate-java.lang.Object-">evaluate</a></span>(<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> object)</code>
<div class="block">Evaulates the object provided against the criteria specified when this
<code>BeanPropertyValueEqualsPredicate</code> was constructed.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>protected boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/beanutils/BeanPropertyValueEqualsPredicate.html#evaluateValue-java.lang.Object-java.lang.Object-">evaluateValue</a></span>(<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> expected,
<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> actual)</code>
<div class="block">Utility method which evaluates whether the actual property value equals the expected property
value.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code><a href="http://docs.oracle.com/javase/6/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/commons/beanutils/BeanPropertyValueEqualsPredicate.html#getPropertyName--">getPropertyName</a></span>()</code>
<div class="block">Returns the name of the property which will be evaluated when this <code>Predicate</code> is
executed.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code><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></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/beanutils/BeanPropertyValueEqualsPredicate.html#getPropertyValue--">getPropertyValue</a></span>()</code>
<div class="block">Returns the value that the property specified by <code>propertyName</code> will be compared to
when this <code>Predicate</code> executes.</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/apache/commons/beanutils/BeanPropertyValueEqualsPredicate.html#isIgnoreNull--">isIgnoreNull</a></span>()</code>
<div class="block">Returns the flag which determines whether <code>null</code> objects in the property path will
genenerate an <code>IllegalArgumentException</code> or not.</div>
</td>
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<h3>Methods inherited from class java.lang.<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></h3>
<code><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
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<h4>BeanPropertyValueEqualsPredicate</h4>
<pre>public BeanPropertyValueEqualsPredicate(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> propertyName,
<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> propertyValue)</pre>
<div class="block">Constructor which takes the name of the property, its expected value to be used in evaluation,
and assumes <code>ignoreNull</code> to be <code>false</code>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>propertyName</code> - The name of the property that will be evaluated against the expected value.</dd>
<dd><code>propertyValue</code> - The value to use in object evaluation.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - If the property name provided is null or empty.</dd>
</dl>
</li>
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<h4>BeanPropertyValueEqualsPredicate</h4>
<pre>public BeanPropertyValueEqualsPredicate(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> propertyName,
<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> propertyValue,
boolean ignoreNull)</pre>
<div class="block">Constructor which takes the name of the property, its expected value
to be used in evaluation, and a boolean which determines whether <code>null</code> objects in
the property path will genenerate an <code>IllegalArgumentException</code> or not.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>propertyName</code> - The name of the property that will be evaluated against the expected value.</dd>
<dd><code>propertyValue</code> - The value to use in object evaluation.</dd>
<dd><code>ignoreNull</code> - Determines whether <code>null</code> objects in the property path will
genenerate an <code>IllegalArgumentException</code> or not.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - If the property name provided is null or empty.</dd>
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<h4>evaluate</h4>
<pre>public boolean evaluate(<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> object)</pre>
<div class="block">Evaulates the object provided against the criteria specified when this
<code>BeanPropertyValueEqualsPredicate</code> was constructed. Equality is based on
either reference or logical equality as defined by the property object's equals method. If
any object in the property path leading up to the target property is <code>null</code> then
the outcome will be based on the value of the <code>ignoreNull</code> attribute. By default,
<code>ignoreNull</code> is <code>false</code> and would result in an
<code>IllegalArgumentException</code> if an object in the property path leading up to the
target property is <code>null</code>.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>evaluate</code> in interface <code>org.apache.commons.collections.Predicate</code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>object</code> - The object to be evaluated.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>True if the object provided meets all the criteria for this <code>Predicate</code>;
false otherwise.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - If an IllegalAccessException, InvocationTargetException, or
NoSuchMethodException is thrown when trying to access the property specified on the object
provided. Or if an object in the property path provided is <code>null</code> and
<code>ignoreNull</code> is set to <code>false</code>.</dd>
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<h4>evaluateValue</h4>
<pre>protected boolean evaluateValue(<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> expected,
<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> actual)</pre>
<div class="block">Utility method which evaluates whether the actual property value equals the expected property
value.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>expected</code> - The expected value.</dd>
<dd><code>actual</code> - The actual value.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>True if they are equal; false otherwise.</dd>
</dl>
</li>
</ul>
<a name="getPropertyName--">
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<h4>getPropertyName</h4>
<pre>public <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> getPropertyName()</pre>
<div class="block">Returns the name of the property which will be evaluated when this <code>Predicate</code> is
executed.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The name of the property which will be evaluated when this <code>Predicate</code> is
executed.</dd>
</dl>
</li>
</ul>
<a name="getPropertyValue--">
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<h4>getPropertyValue</h4>
<pre>public <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> getPropertyValue()</pre>
<div class="block">Returns the value that the property specified by <code>propertyName</code> will be compared to
when this <code>Predicate</code> executes.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The value that the property specified by <code>propertyName</code> will be compared to
when this <code>Predicate</code> executes.</dd>
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<h4>isIgnoreNull</h4>
<pre>public boolean isIgnoreNull()</pre>
<div class="block">Returns the flag which determines whether <code>null</code> objects in the property path will
genenerate an <code>IllegalArgumentException</code> or not. If set to <code>true</code> then
if any objects in the property path evaluate to <code>null</code> then the
<code>IllegalArgumentException</code> throw by <code>PropertyUtils</code> will be logged but
not rethrown and <code>false</code> will be returned. If set to <code>false</code> then if
any objects in the property path evaluate to <code>null</code> then the
<code>IllegalArgumentException</code> throw by <code>PropertyUtils</code> will be logged and
rethrown.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The flag which determines whether <code>null</code> objects in the property path will
genenerate an <code>IllegalArgumentException</code> or not.</dd>
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