Example usage for org.apache.commons.functor.core.composite ConditionalBinaryFunction ConditionalBinaryFunction

Introduction

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

Prototype

public ConditionalBinaryFunction(BinaryPredicate<? super L, ? super R> ifPred,
        BinaryFunction<? super L, ? super R, ? extends T> thenFunc,
        BinaryFunction<? super L, ? super R, ? extends T> elseFunc) 

Source Link

Document

Create a new ConditionalBinaryFunction.

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.//from   w  w w  .  ja v  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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From source file:org.apache.commons.functor.example.map.PredicatedMap.java

public PredicatedMap(Map<K, V> map, final Predicate<K> keyPredicate, final Predicate<V> valuePredicate) {
    super(map);//from   w w  w.ja  v a2 s.  c  o m
    setOnPut(new ConditionalBinaryFunction<Map<K, V>, Object[], V>(new BinaryPredicate<Map<K, V>, Object[]>() {
        @SuppressWarnings("unchecked")
        public boolean test(Map<K, V> a, Object[] b) {
            return keyPredicate.test((K) Array.get(b, 0)) && valuePredicate.test((V) Array.get(b, 1));
        }
    }, DEFAULT_ON_PUT, BinaryProcedureBinaryFunction
            .<Map<K, V>, Object[], V>adapt(new Throw<Map<K, V>, Object>(new IllegalArgumentException()))));

    setOnPutAll(new BinaryProcedure<Map<K, V>, Map<K, V>>() {
        public void run(Map<K, V> dest, Map<K, V> src) {
            for (Iterator<Map.Entry<K, V>> iter = src.entrySet().iterator(); iter.hasNext();) {
                Map.Entry<K, V> pair = iter.next();
                if (keyPredicate.test(pair.getKey()) && valuePredicate.test(pair.getValue())) {
                    dest.put(pair.getKey(), pair.getValue());
                }
            }
        }
    });
}

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