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Akka/Scala example source code file (Match.java)
The Match.java Akka example source code/** * Copyright (C) 2009-2014 Typesafe Inc. <http://www.typesafe.com> */ package akka.japi.pf; import scala.MatchError; import scala.PartialFunction; /** * Version of {@link scala.PartialFunction} that can be built during * runtime from Java. * * @param <I> the input type, that this PartialFunction will be applied to * @param <R> the return type, that the results of the application will have * * This is an EXPERIMENTAL feature and is subject to change until it has received more real world testing. */ public class Match<I, R> extends AbstractMatch<I, R> { /** * Convenience function to create a {@link PFBuilder} with the first * case statement added. * * @param type a type to match the argument against * @param apply an action to apply to the argument if the type matches * @return a builder with the case statement added * @see PFBuilder#match(Class, FI.Apply) */ public static final <F, T, P> PFBuilder<F, T> match(final Class<P> type, final FI.Apply<P, T> apply) { return new PFBuilder<F, T>().match(type, apply); } /** * Convenience function to create a {@link PFBuilder} with the first * case statement added. * * @param type a type to match the argument against * @param predicate a predicate that will be evaluated on the argument if the type matches * @param apply an action to apply to the argument if the type matches * @return a builder with the case statement added * @see PFBuilder#match(Class, FI.TypedPredicate, FI.Apply) */ public static <F, T, P> PFBuilder<F, T> match(final Class<P> type, final FI.TypedPredicate<P> predicate, final FI.Apply<P, T> apply) { return new PFBuilder<F, T>().match(type, predicate, apply); } /** * Convenience function to create a {@link PFBuilder} with the first * case statement added. * * @param object the object to compare equals with * @param apply an action to apply to the argument if the object compares equal * @return a builder with the case statement added * @see PFBuilder#matchEquals(Object, FI.Apply) */ public static <F, T, P> PFBuilder<F, T> matchEquals(final P object, final FI.Apply<P, T> apply) { return new PFBuilder<F, T>().matchEquals(object, apply); } /** * Convenience function to create a {@link PFBuilder} with the first * case statement added. * * @param apply an action to apply to the argument * @return a builder with the case statement added * @see PFBuilder#matchAny(FI.Apply) */ public static <F, T> PFBuilder<F, T> matchAny(final FI.Apply<Object, T> apply) { return new PFBuilder<F, T>().matchAny(apply); } /** * Create a {@link Match} from the builder. * * @param builder a builder representing the partial function * @return a {@link Match} that can be reused */ public static final <F, T> Match<F, T> create(PFBuilder<F, T> builder) { return new Match<F, T>(builder.build()); } Match(PartialFunction<I, R> statements) { super(statements); } /** * Convenience function to make the Java code more readable. * * <pre><code> * Matcher<X, Y> matcher = Matcher.create(...); * * Y someY = matcher.match(obj); * </code></pre> * * @param i the argument to apply the match to * @return the result of the application * @throws MatchError if there is no match */ public R match(I i) throws MatchError { return statements.apply(i); } } Other Akka source code examplesHere is a short list of links related to this Akka Match.java source code file: |
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