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Java > Open Source Codes > prefuse > data > expression > Predicate


1 package prefuse.data.expression;
2
3 /**
4  * A Predicate is a special type of Expression that carries the guarantee
5  * that the {@link prefuse.data.expression.Expression#getBoolean(Tuple)}
6  * method is supported. Predicates are particularly useful for issuing
7  * queries to prefuse data structures. To create a Predicate, one can
8  * either instantiate the desired Predicate instances directly, or
9  * write a parseable textual expression. The documentation for the
10  * {@link prefuse.data.expression.parser.ExpressionParser} class includes
11  * a full reference for prefuse's textual expression language.
12  *
13  * @author <a HREF="http://jheer.org">jeffrey heer</a>
14  */
15 public interface Predicate extends Expression {
16     
17 } // end of interface Predicate
18
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