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/* Glazed Lists (c) 2003-2006 */
/* http://publicobject.com/glazedlists/ publicobject.com,*/
/* O'Dell Engineering Ltd.*/
package ca.odell.glazedlists.impl.matchers;
import ca.odell.glazedlists.impl.GlazedListsImpl;
import ca.odell.glazedlists.impl.beans.BeanProperty;
import ca.odell.glazedlists.matchers.Matcher;
/**
* A {@link Matcher} which uses a {@link BeanProperty} to read a bean property
* from a given bean and check it for equality with a given value.
* <code>null</code> property values are allowed.
*
* @author James Lemieux
*/
public final class BeanPropertyMatcher<E> implements Matcher<E> {
/** The BeanProperty containing logic for extracting the property value from an item. */
private final BeanProperty<E> beanProperty;
/** The value with which to compare the bean property. */
private final Object value;
/**
* Create a new {@link Matcher} that matches whenever the given property
* equals the given <code>value</code>.
*/
public BeanPropertyMatcher(Class<E> beanClass, String propertyName, Object value) {
this.beanProperty = new BeanProperty<E>(beanClass, propertyName, true, false);
this.value = value;
}
/** {@inheritDoc} */
public boolean matches(E item) {
if (item == null) return false;
return GlazedListsImpl.equal(this.beanProperty.get(item), this.value);
}
}
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