ort/AbstractAttribute.html" title="class in com.googlecode.cqengine.attribute.support">AbstractAttribute</a>&lt;O,&#8203;A&gt;</pre>
<div class="block">Represents an attribute in an object which has multiple values (such as a field which is itself a collection),
 where some of the values might be null, or where the collection of values itself might be null.
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 Provides a method to read the values from the field given such an object.
 <p/>
 This type of attribute performs runtime validation of values to 