src/share/classes/java/util/function/LongPredicate.java

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rev 7047 : 8004015: Additional static and instance utils for functional interfaces.
Reviewed-by: briangoetz


  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 package java.util.function;
  26 
  27 import java.util.Objects;
  28 
  29 /**
  30  * Determines if the {@code long} input value matches some criteria. This is the
  31  * {@code long}-consuming primitive type specialization of {@link Predicate}.
  32  *
  33  * @see Predicate
  34  * @since 1.8
  35  */
  36 @FunctionalInterface
  37 public interface LongPredicate {
  38 
  39     /**
  40      * Returns {@code true} if the input value matches some criteria.
  41      *
  42      * @param value the value to be tested.
  43      * @return {@code true} if the input value matches some criteria, otherwise
  44      * {@code false}.
  45      */
  46     public boolean test(long value);
  47 
  48     /**
  49      * Returns a predicate which evaluates to {@code true} only if this
  50      * predicate and the provided predicate both evaluate to {@code true}. If
  51      * this predicate returns {@code false} then the remaining predicate is not
  52      * evaluated.
  53      *
  54      * @param p a predicate which will be logically-ANDed with this predicate.
  55      * @return a new predicate which returns {@code true} only if both
  56      * predicates return {@code true}.
  57      */
  58     public default LongPredicate and(LongPredicate p) {
  59         Objects.requireNonNull(p);
  60         return (value) -> test(value) && p.test(value);
  61     }
  62 
  63     /**
  64      * Returns a predicate which negates the result of this predicate.
  65      *
  66      * @return a new predicate who's result is always the opposite of this
  67      * predicate.
  68      */
  69     public default LongPredicate negate() {
  70         return (value) -> !test(value);
  71     }
  72 
  73     /**
  74      * Returns a predicate which evaluates to {@code true} if either this
  75      * predicate or the provided predicate evaluates to {@code true}. If this
  76      * predicate returns {@code true} then the remaining predicate is not
  77      * evaluated.
  78      *
  79      * @param p a predicate which will be logically-ORed with this predicate.
  80      * @return a new predicate which returns {@code true} if either predicate
  81      * returns {@code true}.

  82      */
  83     public default LongPredicate or(LongPredicate p) {
  84         Objects.requireNonNull(p);
  85         return (value) -> test(value) || p.test(value);
  86     }
  87 
  88     /**
  89      * Returns a predicate that evaluates to {@code true} if both or neither of
  90      * the component predicates evaluate to {@code true}.
  91      *
  92      * @param p a predicate which will be logically-XORed with this predicate.
  93      * @return a predicate that evaluates to {@code true} if both or neither of
  94      * the component predicates evaluate to {@code true}.
  95      */
  96     public default LongPredicate xor(LongPredicate p) {
  97         Objects.requireNonNull(p);
  98         return (value) -> test(value) ^ p.test(value);
  99     }
 100 }


  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 package java.util.function;
  26 
  27 import java.util.Objects;
  28 
  29 /**
  30  * Determines if the {@code long} input value matches some criteria. This is the
  31  * {@code long}-consuming primitive type specialization of {@link Predicate}.
  32  *
  33  * @see Predicate
  34  * @since 1.8
  35  */
  36 @FunctionalInterface
  37 public interface LongPredicate {
  38 
  39     /**
  40      * Returns {@code true} if the input value matches some criteria.
  41      *
  42      * @param value the value to be tested
  43      * @return {@code true} if the input value matches some criteria, otherwise
  44      * {@code false}
  45      */
  46     boolean test(long value);
  47 
  48     /**
  49      * Returns a predicate which evaluates to {@code true} only if this
  50      * predicate and the provided predicate both evaluate to {@code true}. If
  51      * this predicate returns {@code false} then the remaining predicate is not
  52      * evaluated.
  53      *
  54      * @param p a predicate which will be logically-ANDed with this predicate
  55      * @return a new predicate which returns {@code true} only if both
  56      * predicates return {@code true}
  57      */
  58     default LongPredicate and(LongPredicate p) {
  59         Objects.requireNonNull(p);
  60         return (value) -> test(value) && p.test(value);
  61     }
  62 
  63     /**
  64      * Returns a predicate which negates the result of this predicate.
  65      *
  66      * @return a new predicate who's result is always the opposite of this
  67      * predicate
  68      */
  69     default LongPredicate negate() {
  70         return (value) -> !test(value);
  71     }
  72 
  73     /**
  74      * Returns a predicate which evaluates to {@code true} if either this
  75      * predicate or the provided predicate evaluates to {@code true}. If this
  76      * predicate returns {@code true} then the remaining predicate is not
  77      * evaluated.
  78      *
  79      * @param p a predicate which will be logically-ORed with this predicate
  80      * @return a new predicate which returns {@code true} if either predicate
  81      * returns {@code true}
  82      * @throws NullPointerException if p is null
  83      */
  84     default LongPredicate or(LongPredicate p) {
  85         Objects.requireNonNull(p);
  86         return (value) -> test(value) || p.test(value);













  87     }
  88 }