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

rev 7675 : 8019840: Spec updates for java.util.function
Reviewed-by: mduigou
Contributed-by: brian.goetz@oracle.com

*** 25,67 ****
  package java.util.function;
  
  import java.util.Objects;
  
  /**
!  * An operation which accepts a single input argument and returns no result.
!  * Unlike most other functional interfaces, {@code Consumer} is expected to
!  * operate via side-effects.
   *
!  * @param <T> The type of input objects to {@code accept}
   *
   * @since 1.8
   */
  @FunctionalInterface
  public interface Consumer<T> {
  
      /**
!      * Accept an input value.
       *
!      * @param t the input object
       */
      void accept(T t);
  
      /**
!      * Returns a {@code Consumer} which performs, in sequence, the operation
!      * represented by this object followed by the operation represented by
!      * the other {@code Consumer}.
!      *
!      * <p>Any exceptions thrown by either {@code accept} method are relayed
!      * to the caller; if performing this operation throws an exception, the
!      * other operation will not be performed.
       *
!      * @param other a Consumer which will be chained after this Consumer
!      * @return a Consumer which performs in sequence the {@code accept} method
!      * of this Consumer and the {@code accept} method of the specified Consumer
!      * operation
!      * @throws NullPointerException if other is null
       */
!     default Consumer<T> chain(Consumer<? super T> other) {
!         Objects.requireNonNull(other);
!         return (T t) -> { accept(t); other.accept(t); };
      }
  }
--- 25,67 ----
  package java.util.function;
  
  import java.util.Objects;
  
  /**
!  * Represents an operation that accepts a single input argument and returns no
!  * result. Unlike most other functional interfaces, {@code Consumer} is expected
!  * to operate via side-effects.
   *
!  * <p>This is a <a href="package-summary.html">functional interface</a>
!  * whose functional method is {@link #accept(Object)}.
!  *
!  * @param <T> the type of the input to the operation
   *
   * @since 1.8
   */
  @FunctionalInterface
  public interface Consumer<T> {
  
      /**
!      * Performs this operation on the given argument.
       *
!      * @param t the input argument
       */
      void accept(T t);
  
      /**
!      * Returns a composed {@code Consumer} that performs, in sequence, this
!      * operation followed by the {@code after} operation. If performing either
!      * operation throws an exception, it is relayed to the caller of the
!      * composed operation.  If performing this operation throws an exception,
!      * the {@code after} operation will not be performed.
       *
!      * @param after the operation to perform after this operation
!      * @return a composed {@code Consumer} that performs in sequence this
!      * operation followed by the {@code after} operation
!      * @throws NullPointerException if {@code after} is null
       */
!     default Consumer<T> andThen(Consumer<? super T> after) {
!         Objects.requireNonNull(after);
!         return (T t) -> { accept(t); after.accept(t); };
      }
  }