Example usage for org.apache.commons.functor.core.composite Composite predicate

Introduction

In this page you can find the example usage for org.apache.commons.functor.core.composite Composite predicate.

Prototype

public static <L, R, G, H> UnaryCompositeBinaryPredicate<L, R> predicate(
        BinaryPredicate<? super G, ? super H> p, UnaryFunction<? super L, ? extends G> g,
        UnaryFunction<? super R, ? extends H> h) 

Source Link

Document

Create a composite BinaryPredicate.

Usage

From source file:org.apache.commons.functor.example.kata.four.DataMunger.java

/**
 * A BinaryFunction that will calculate the absolute
 * difference between col1 and col2 in the given
 * String arguments, and return the argument
 * whose difference is smallest.// w  w  w . j  av  a 2  s . co m
 */
private static final BinaryFunction<String, String, String> lesserSpread(final int col1, final int col2) {
    return new ConditionalBinaryFunction<String, String, String>(IsNull.<String>left(), // if left is null
            RightIdentity.<String, String>function(), //   return right
            Conditional.function( //   else return the parameter with the least spread
                    Composite.predicate( //     if left is less than right
                            IsLessThan.instance(), absSpread(col1, col2), absSpread(col1, col2)),
                    LeftIdentity.<String, String>function(), //       return left
                    RightIdentity.<String, String>function() //       else return right
            ));
}

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