Package org.codehaus.groovy.vmplugin.v8

Class PluginDefaultGroovyMethods

java.lang.Object
org.codehaus.groovy.runtime.DefaultGroovyMethodsSupport
org.codehaus.groovy.vmplugin.v8.PluginDefaultGroovyMethods
public class PluginDefaultGroovyMethods
extends DefaultGroovyMethodsSupport
Defines new Groovy methods which appear on standard Java 8 classes within the Groovy environment.
Since:
2.5.0

  • Method Summary

    Modifier and Type Method Description
    static boolean asBoolean​(java.util.Optional<?> optional)
    Coerce an Optional instance to a boolean value.
    static <S,​ T> java.util.concurrent.Future<T> collect​(java.util.concurrent.Future<S> self, Closure<T> transform)
    Returns a Future asynchronously returning a transformed result.
    static <S,​ T> java.util.Optional<T> collect​(java.util.Optional<S> self, Closure<T> transform)
    If the optional contains a value, returns an optional containing the transformed value obtained using the transform closure or otherwise an empty optional.
    static java.util.stream.DoubleStream doubleStream​(double[] self)
    Returns a sequential DoubleStream with the specified array as its source.
    static <T> java.util.Optional<T> filter​(java.util.Optional<?> self, java.lang.Class<T> type)
    Tests given value against specified type and changes generics of result.
    static java.util.OptionalDouble filter​(java.util.OptionalDouble self, java.util.function.DoublePredicate test)
    If a value is present in the OptionalDouble, tests the value using the given predicate and returns the optional if the test returns true or empty otherwise.
    static java.util.OptionalInt filter​(java.util.OptionalInt self, java.util.function.IntPredicate test)
    If a value is present in the OptionalInt, tests the value using the given predicate and returns the optional if the test returns true or else empty.
    static java.util.OptionalLong filter​(java.util.OptionalLong self, java.util.function.LongPredicate test)
    If a value is present in the OptionalLong, tests the value using the given predicate and returns the optional if the test returns true or else empty.
    static double get​(java.util.OptionalDouble self)
    If a value is present in the OptionalDouble, returns the value, otherwise throws NoSuchElementException.
    static int get​(java.util.OptionalInt self)
    If a value is present in the OptionalInt, returns the value, otherwise throws NoSuchElementException.
    static long get​(java.util.OptionalLong self)
    If a value is present in the OptionalLong, returns the value, otherwise throws NoSuchElementException.
    static java.util.stream.IntStream intStream​(int[] self)
    Returns a sequential IntStream with the specified array as its source.
    static java.lang.StringBuilder leftShift​(java.lang.StringBuilder self, java.lang.Object value)
    Overloads the left shift operator to provide an easy way to append multiple objects as string representations to a StringBuilder.
    static java.util.stream.LongStream longStream​(long[] self)
    Returns a sequential LongStream with the specified array as its source.
    static <T> java.util.OptionalDouble mapToDouble​(java.util.Optional<T> self, java.util.function.ToDoubleFunction<? super T> mapper)
    If a value is present in the OptionalDouble, returns an OptionalDouble consisting of the result of applying the given function to the value or else empty.
    static <T> java.util.OptionalInt mapToInt​(java.util.Optional<T> self, java.util.function.ToIntFunction<? super T> mapper)
    If a value is present in the OptionalInt, returns an OptionalInt consisting of the result of applying the given function to the value or else empty.
    static <T> java.util.OptionalLong mapToLong​(java.util.Optional<T> self, java.util.function.ToLongFunction<? super T> mapper)
    If a value is present in the OptionalLong, returns an OptionalLong consisting of the result of applying the given function to the value or else empty.
    static <T> java.util.Optional<T> mapToObj​(java.util.OptionalDouble self, java.util.function.DoubleFunction<? extends T> mapper)
    If a value is present in the OptionalDouble, returns an Optional consisting of the result of applying the given function to the value or else empty.
    static <T> java.util.Optional<T> mapToObj​(java.util.OptionalInt self, java.util.function.IntFunction<? extends T> mapper)
    If a value is present in the OptionalInt, returns an Optional consisting of the result of applying the given function to the value or else empty.
    static <T> java.util.Optional<T> mapToObj​(java.util.OptionalLong self, java.util.function.LongFunction<? extends T> mapper)
    If a value is present in the OptionalLong, returns an Optional consisting of the result of applying the given function to the value or else empty.
    static java.lang.Object next​(java.lang.Enum self)
    Overloads the ++ operator for enums.
    static <T> java.util.Optional<T> orOptional​(java.util.Optional<T> self, java.util.function.Supplier<? extends java.util.Optional<? extends T>> supplier)
    Provide similar functionality to JDK9 or on JDK8.
    static java.lang.String plus​(java.lang.StringBuilder self, java.lang.String value)
    Appends a String to this StringBuilder.
    static java.lang.Object previous​(java.lang.Enum self)
    Overloads the -- operator for enums.
    static void putAt​(java.lang.StringBuilder self, EmptyRange range, java.lang.Object value)
    Supports the range subscript operator for StringBuilder.
    static void putAt​(java.lang.StringBuilder self, IntRange range, java.lang.Object value)
    Supports the range subscript operator for StringBuilder.
    static int size​(java.lang.StringBuilder self)
    Deprecated.
    static java.util.stream.Stream<java.lang.Boolean> stream​(boolean[] self)
    Returns a sequential Stream with the specified array as its source.
    static java.util.stream.Stream<java.lang.Byte> stream​(byte[] self)
    Returns a sequential Stream with the specified array as its source.
    static java.util.stream.Stream<java.lang.Character> stream​(char[] self)
    Returns a sequential Stream with the specified array as its source.
    static java.util.stream.Stream<java.lang.Double> stream​(double[] self)
    Returns a sequential Stream with the specified array as its source.
    static java.util.stream.Stream<java.lang.Float> stream​(float[] self)
    Returns a sequential Stream with the specified array as its source.
    static java.util.stream.Stream<java.lang.Integer> stream​(int[] self)
    Returns a sequential Stream with the specified array as its source.
    static java.util.stream.Stream<java.lang.Long> stream​(long[] self)
    Returns a sequential Stream with the specified array as its source.
    static java.util.stream.Stream<java.lang.Short> stream​(short[] self)
    Returns a sequential Stream with the specified array as its source.
    static <T> java.util.stream.Stream<T> stream​(java.lang.Iterable<T> self)
    Returns a sequential Stream with the specified element(s) as its source.
    static <T> java.util.stream.Stream<T> stream​(java.util.Enumeration<T> self)
    Returns a sequential Stream with the specified element(s) as its source.
    static <T> java.util.stream.Stream<T> stream​(java.util.Iterator<T> self)
    Returns a sequential Stream with the specified element(s) as its source.
    static <T> java.util.stream.Stream<T> stream​(java.util.Optional<T> self)
    If a value is present in the Optional, returns a Stream with the value as its source or else an empty stream.
    static java.util.stream.DoubleStream stream​(java.util.OptionalDouble self)
    If a value is present in the OptionalDouble, returns a DoubleStream with the value as its source or else an empty stream.
    static java.util.stream.IntStream stream​(java.util.OptionalInt self)
    If a value is present in the OptionalInt, returns an IntStream with the value as its source or else an empty stream.
    static java.util.stream.LongStream stream​(java.util.OptionalLong self)
    If a value is present in the OptionalLong, returns a LongStream with the value as its source or else an empty stream.
    static <T> java.util.stream.Stream<T> stream​(java.util.Spliterator<T> self)
    Returns a sequential Stream with the specified element(s) as its source.
    static <T> java.util.stream.Stream<T> stream​(NullObject self)
    Returns an empty sequential Stream.
    static <T> java.util.stream.Stream<T> stream​(T self)
    Returns a sequential Stream containing a single element.
    static <T> java.util.stream.Stream<T> stream​(T[] self)
    Returns a sequential Stream with the specified array as its source.
    static <T> T[] toArray​(java.util.stream.Stream<? extends T> self, java.lang.Class<T> type)
    Returns an array containing the elements of the stream.
    static <T> java.util.List<T> toList​(java.util.stream.BaseStream<T,​? extends java.util.stream.BaseStream> self)
    Accumulates the elements of stream into a new List.
    static <T> java.util.List<T> toList​(java.util.stream.Stream<T> self)
    Accumulates the elements of stream into a new List.
    static <T> java.util.Set<T> toSet​(java.util.stream.BaseStream<T,​? extends java.util.stream.BaseStream> self)
    Accumulates the elements of stream into a new Set.
    static <T> java.util.Set<T> toSet​(java.util.stream.Stream<T> self)
    Accumulates the elements of stream into a new Set.

    Methods inherited from class org.codehaus.groovy.runtime.DefaultGroovyMethodsSupport

    cloneSimilarCollection, cloneSimilarMap, closeQuietly, closeWithWarning, createSimilarArray, createSimilarCollection, createSimilarCollection, createSimilarCollection, createSimilarList, createSimilarMap, createSimilarOrDefaultCollection, createSimilarQueue, createSimilarSet, normaliseIndex, sameType, subListBorders, subListBorders, writeUTF16BomIfRequired, writeUTF16BomIfRequired, writeUTF16BomIfRequired, writeUTF16BomIfRequired

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Method Details

    • asBoolean

      public static boolean asBoolean​(java.util.Optional<?> optional)
      Coerce an Optional instance to a boolean value. 
       assert !Optional.empty().asBoolean()
 assert Optional.of(1234).asBoolean()
      Parameters:
      optional - the Optional
      Returns:
      true if a value is present, otherwise false
      Since:
      2.5.0

    • get

      public static int get​(java.util.OptionalInt self)
      If a value is present in the OptionalInt, returns the value, otherwise throws NoSuchElementException. 
       assert OptionalInt.of(1234).get() == 1234
      Since:
      3.0.0

    • get

      public static long get​(java.util.OptionalLong self)
      If a value is present in the OptionalLong, returns the value, otherwise throws NoSuchElementException. 
       assert OptionalLong.of(1234L).get() == 1234L
      Since:
      3.0.0

    • get

      public static double get​(java.util.OptionalDouble self)
      If a value is present in the OptionalDouble, returns the value, otherwise throws NoSuchElementException. 
       assert OptionalDouble.of(Math.PI).get() == Math.PI
      Since:
      3.0.0

    • filter

      public static <T> java.util.Optional<T> filter​(java.util.Optional<?> self, java.lang.Class<T> type)
      Tests given value against specified type and changes generics of result. This is equivalent to: self.filter(it -> it instanceof Type).map(it -> (Type) it) 
       assert !Optional.empty().filter(Number).isPresent()
 assert !Optional.of('x').filter(Number).isPresent()
 assert Optional.of(1234).filter(Number).isPresent()
 assert Optional.of(1234).filter(Number).get().equals(1234)
      Since:
      3.0.0

    • filter

      public static java.util.OptionalInt filter​(java.util.OptionalInt self, java.util.function.IntPredicate test)
      If a value is present in the OptionalInt, tests the value using the given predicate and returns the optional if the test returns true or else empty. 
       assert !OptionalInt.empty().filter(i -> true).isPresent()
 assert  OptionalInt.of(1234).filter(i -> true).isPresent()
 assert !OptionalInt.of(1234).filter(i -> false).isPresent()
 assert  OptionalInt.of(1234).filter(i -> true).getAsInt() == 1234
      Since:
      3.0.0

    • filter

      public static java.util.OptionalLong filter​(java.util.OptionalLong self, java.util.function.LongPredicate test)
      If a value is present in the OptionalLong, tests the value using the given predicate and returns the optional if the test returns true or else empty. 
       assert !OptionalLong.empty().filter(n -> true).isPresent()
 assert  OptionalLong.of(123L).filter(n -> true).isPresent()
 assert !OptionalLong.of(123L).filter(n -> false).isPresent()
 assert  OptionalLong.of(123L).filter(n -> true).getAsLong() == 123L
      Since:
      3.0.0

    • filter

      public static java.util.OptionalDouble filter​(java.util.OptionalDouble self, java.util.function.DoublePredicate test)
      If a value is present in the OptionalDouble, tests the value using the given predicate and returns the optional if the test returns true or empty otherwise. 
       assert !OptionalDouble.empty().filter(n -> true).isPresent()
 assert  OptionalDouble.of(Math.PI).filter(n -> true).isPresent()
 assert !OptionalDouble.of(Math.PI).filter(n -> false).isPresent()
 assert  OptionalDouble.of(Math.PI).filter(n -> true).getAsDouble() == Math.PI
      Since:
      3.0.0

    • mapToObj

      public static <T> java.util.Optional<T> mapToObj​(java.util.OptionalInt self, java.util.function.IntFunction<? extends T> mapper)
      If a value is present in the OptionalInt, returns an Optional consisting of the result of applying the given function to the value or else empty. 
       assert !OptionalInt.empty().mapToObj(x -> new Object()).isPresent()
 assert  OptionalInt.of(1234).mapToObj(x -> new Object()).isPresent()
 assert !OptionalInt.of(1234).mapToObj(x -> null).isPresent()
 assert  OptionalInt.of(1234).mapToObj(Integer::toString).get() == '1234'
      Since:
      3.0.0

    • mapToObj

      public static <T> java.util.Optional<T> mapToObj​(java.util.OptionalLong self, java.util.function.LongFunction<? extends T> mapper)
      If a value is present in the OptionalLong, returns an Optional consisting of the result of applying the given function to the value or else empty. 
       assert !OptionalLong.empty().mapToObj(x -> new Object()).isPresent()
 assert  OptionalLong.of(123L).mapToObj(x -> new Object()).isPresent()
 assert !OptionalLong.of(123L).mapToObj(x -> null).isPresent()
 assert  OptionalLong.of(1234L).mapToObj(Long::toString).get() == '1234'
      Since:
      3.0.0

    • mapToObj

      public static <T> java.util.Optional<T> mapToObj​(java.util.OptionalDouble self, java.util.function.DoubleFunction<? extends T> mapper)
      If a value is present in the OptionalDouble, returns an Optional consisting of the result of applying the given function to the value or else empty. 
       assert !OptionalDouble.empty().mapToObj(x -> new Object()).isPresent()
 assert  OptionalDouble.of(Math.PI).mapToObj(x -> new Object()).isPresent()
 assert !OptionalDouble.of(Math.PI).mapToObj(x -> null).isPresent()
 assert  OptionalDouble.of(Math.PI).mapToObj(Double::toString).get().startsWith('3.14')
      Since:
      3.0.0

    • mapToInt

      public static <T> java.util.OptionalInt mapToInt​(java.util.Optional<T> self, java.util.function.ToIntFunction<? super T> mapper)
      If a value is present in the OptionalInt, returns an OptionalInt consisting of the result of applying the given function to the value or else empty. 
       assert !Optional.empty().mapToInt(x -> 42).isPresent()
 assert  Optional.of('x').mapToInt(x -> 42).getAsInt() == 42
      Since:
      3.0.0

    • mapToLong

      public static <T> java.util.OptionalLong mapToLong​(java.util.Optional<T> self, java.util.function.ToLongFunction<? super T> mapper)
      If a value is present in the OptionalLong, returns an OptionalLong consisting of the result of applying the given function to the value or else empty. 
       assert !Optional.empty().mapToLong(x -> 42L).isPresent()
 assert  Optional.of('x').mapToLong(x -> 42L).getAsLong() == 42L
      Since:
      3.0.0

    • mapToDouble

      public static <T> java.util.OptionalDouble mapToDouble​(java.util.Optional<T> self, java.util.function.ToDoubleFunction<? super T> mapper)
      If a value is present in the OptionalDouble, returns an OptionalDouble consisting of the result of applying the given function to the value or else empty. 
       assert !Optional.empty().mapToDouble(x -> Math.PI).isPresent()
 assert  Optional.of('x').mapToDouble(x -> Math.PI).getAsDouble() == Math.PI
      Since:
      3.0.0

    • collect

      public static <S,​ T> java.util.Optional<T> collect​(java.util.Optional<S> self, Closure<T> transform)
      If the optional contains a value, returns an optional containing the transformed value obtained using the transform closure or otherwise an empty optional. 
       assert Optional.of("foobar").collect{ it.size() }.get() == 6
 assert !Optional.empty().collect{ it.size() }.isPresent()
      Parameters:
      self - an Optional
      transform - the closure used to transform the optional value if present
      Returns:
      an Optional containing the transformed value or empty if the optional is empty or the transform returns null
      Since:
      3.0.0

    • collect

      public static <S,​ T> java.util.concurrent.Future<T> collect​(java.util.concurrent.Future<S> self, Closure<T> transform)
      Returns a Future asynchronously returning a transformed result. 
       import java.util.concurrent.*
 def executor = Executors.newSingleThreadExecutor()
 Future foobar = executor.submit{ "foobar" }
 Future foobarSize = foobar.collect{ it.size() }
 assert foobarSize.get() == 6
 executor.shutdown()
      Parameters:
      self - a Future
      transform - the closure used to transform the Future value
      Returns:
      a Future allowing the transformed value to be obtained asynchronously
      Since:
      3.0.0

    • next

      public static java.lang.Object next​(java.lang.Enum self)
      Overloads the ++ operator for enums. It will invoke Groovy's default next behaviour for enums that do not have their own next method.
      Parameters:
      self - an Enum
      Returns:
      the next defined enum from the enum class
      Since:
      1.5.2

    • previous

      public static java.lang.Object previous​(java.lang.Enum self)
      Overloads the -- operator for enums. It will invoke Groovy's default previous behaviour for enums that do not have their own previous method.
      Parameters:
      self - an Enum
      Returns:
      the previous defined enum from the enum class
      Since:
      1.5.2

    • size

      @Deprecated public static int size​(java.lang.StringBuilder self)
      Deprecated.
      Provides the standard Groovy size() method for StringBuilder.
      Parameters:
      self - a StringBuilder
      Returns:
      the length of the StringBuilder
      Since:
      1.5.2
      See Also:
      StringGroovyMethods.size(CharSequence)

    • leftShift

      public static java.lang.StringBuilder leftShift​(java.lang.StringBuilder self, java.lang.Object value)
      Overloads the left shift operator to provide an easy way to append multiple objects as string representations to a StringBuilder.
      Parameters:
      self - a StringBuilder
      value - a value to append
      Returns:
      the StringBuilder on which this operation was invoked
      Since:
      1.5.2

    • putAt

      public static void putAt​(java.lang.StringBuilder self, IntRange range, java.lang.Object value)
      Supports the range subscript operator for StringBuilder. Index values are treated as characters within the builder.
      Parameters:
      self - a StringBuilder
      range - a Range
      value - the object that's toString() will be inserted
      Since:
      1.5.2

    • putAt

      public static void putAt​(java.lang.StringBuilder self, EmptyRange range, java.lang.Object value)
      Supports the range subscript operator for StringBuilder.
      Parameters:
      self - a StringBuilder
      range - a Range
      value - the object that's toString() will be inserted
      Since:
      1.5.2

    • plus

      public static java.lang.String plus​(java.lang.StringBuilder self, java.lang.String value)
      Appends a String to this StringBuilder.
      Parameters:
      self - a StringBuilder
      value - a String
      Returns:
      a String
      Since:
      1.5.2

    • toArray

      public static <T> T[] toArray​(java.util.stream.Stream<? extends T> self, java.lang.Class<T> type)
      Returns an array containing the elements of the stream. 
       import static groovy.test.GroovyAssert.shouldFail

 assert Arrays.equals([].stream().toArray(Object), new Object[0])
 assert Arrays.equals([].stream().toArray(String), new String[0])
 assert Arrays.equals([].stream().toArray(String[]), new String[0][])
 assert Arrays.equals(['x'].stream().toArray(Object), ['x'].toArray())
 assert Arrays.equals(['x'].stream().toArray(String), ['x'] as String[])
 assert Arrays.deepEquals([['x'] as String[]].stream().toArray(String[]), [['x'] as String[]] as String[][])
 assert Arrays.equals(['x'].stream().toArray(CharSequence), ['x'] as CharSequence[])

 shouldFail(ArrayStoreException) {
     ['x'].stream().toArray(Thread)
 }

 shouldFail(IllegalArgumentException) {
     ['x'].stream().toArray((Class) null)
 }

 // Stream#toArray(IntFunction) should still be used for closure literal:
 assert Arrays.equals(['x'].stream().toArray { n -> new String[n] }, ['x'] as String[])

 // Stream#toArray(IntFunction) should still be used for method reference:
 assert Arrays.equals(['x'].stream().toArray(String[]::new), ['x'] as String[])
      Parameters:
      self - the stream
      type - the array element type
      Since:
      3.0.4

    • toList

      public static <T> java.util.List<T> toList​(java.util.stream.Stream<T> self)
      Accumulates the elements of stream into a new List.
      Type Parameters:
      T - the type of element
      Parameters:
      self - the stream
      Returns:
      a new java.util.List instance
      Since:
      2.5.0

    • toSet

      public static <T> java.util.Set<T> toSet​(java.util.stream.Stream<T> self)
      Accumulates the elements of stream into a new Set.
      Type Parameters:
      T - the type of element
      Parameters:
      self - the stream
      Returns:
      a new java.util.Set instance
      Since:
      2.5.0

    • toList

      public static <T> java.util.List<T> toList​(java.util.stream.BaseStream<T,​? extends java.util.stream.BaseStream> self)
      Accumulates the elements of stream into a new List.
      Type Parameters:
      T - the type of element
      Parameters:
      self - the java.util.stream.BaseStream
      Returns:
      a new java.util.List instance
      Since:
      2.5.0

    • toSet

      public static <T> java.util.Set<T> toSet​(java.util.stream.BaseStream<T,​? extends java.util.stream.BaseStream> self)
      Accumulates the elements of stream into a new Set.
      Type Parameters:
      T - the type of element
      Parameters:
      self - the java.util.stream.BaseStream
      Returns:
      a new java.util.Set instance
      Since:
      2.5.0

    • stream

      public static <T> java.util.stream.Stream<T> stream​(NullObject self)
      Returns an empty sequential Stream. 
       def item = null
 assert item.stream().toList() == []
 assert !item.stream().findFirst().isPresent()
      Since:
      3.0.0

    • stream

      public static <T> java.util.stream.Stream<T> stream​(T self)
      Returns a sequential Stream containing a single element. 
       def item = 'string'
 assert item.stream().toList() == ['string']
 assert item.stream().findFirst().isPresent()
      Since:
      3.0.0

    • stream

      public static <T> java.util.stream.Stream<T> stream​(T[] self)
      Returns a sequential Stream with the specified array as its source.
      Type Parameters:
      T - The type of the array elements
      Parameters:
      self - The array, assumed to be unmodified during use
      Returns:
      a Stream for the array
      Since:
      2.5.0

    • stream

      public static java.util.stream.Stream<java.lang.Integer> stream​(int[] self)
      Returns a sequential Stream with the specified array as its source.
      Parameters:
      self - The array, assumed to be unmodified during use
      Returns:
      a Stream for the array
      Since:
      2.5.0

    • intStream

      public static java.util.stream.IntStream intStream​(int[] self)
      Returns a sequential IntStream with the specified array as its source.
      Parameters:
      self - The array, assumed to be unmodified during use
      Returns:
      a Stream for the array
      Since:
      3.0.8

    • stream

      public static java.util.stream.Stream<java.lang.Long> stream​(long[] self)
      Returns a sequential Stream with the specified array as its source.
      Parameters:
      self - The array, assumed to be unmodified during use
      Returns:
      a Stream for the array
      Since:
      2.5.0

    • longStream

      public static java.util.stream.LongStream longStream​(long[] self)
      Returns a sequential LongStream with the specified array as its source.
      Parameters:
      self - The array, assumed to be unmodified during use
      Returns:
      a Stream for the array
      Since:
      3.0.8

    • stream

      public static java.util.stream.Stream<java.lang.Double> stream​(double[] self)
      Returns a sequential Stream with the specified array as its source.
      Parameters:
      self - The array, assumed to be unmodified during use
      Returns:
      a Stream for the array
      Since:
      2.5.0

    • doubleStream

      public static java.util.stream.DoubleStream doubleStream​(double[] self)
      Returns a sequential DoubleStream with the specified array as its source.
      Parameters:
      self - The array, assumed to be unmodified during use
      Returns:
      a Stream for the array
      Since:
      3.0.8

    • stream

      public static java.util.stream.Stream<java.lang.Character> stream​(char[] self)
      Returns a sequential Stream with the specified array as its source.
      Parameters:
      self - The array, assumed to be unmodified during use
      Returns:
      a Stream for the array
      Since:
      2.5.0

    • stream

      public static java.util.stream.Stream<java.lang.Byte> stream​(byte[] self)
      Returns a sequential Stream with the specified array as its source.
      Parameters:
      self - The array, assumed to be unmodified during use
      Returns:
      a Stream for the array
      Since:
      2.5.0

    • stream

      public static java.util.stream.Stream<java.lang.Short> stream​(short[] self)
      Returns a sequential Stream with the specified array as its source.
      Parameters:
      self - The array, assumed to be unmodified during use
      Returns:
      a Stream for the array
      Since:
      2.5.0

    • stream

      public static java.util.stream.Stream<java.lang.Boolean> stream​(boolean[] self)
      Returns a sequential Stream with the specified array as its source.
      Parameters:
      self - The array, assumed to be unmodified during use
      Returns:
      a Stream for the array
      Since:
      2.5.0

    • stream

      public static java.util.stream.Stream<java.lang.Float> stream​(float[] self)
      Returns a sequential Stream with the specified array as its source.
      Parameters:
      self - The array, assumed to be unmodified during use
      Returns:
      a Stream for the array
      Since:
      2.5.0

    • stream

      public static <T> java.util.stream.Stream<T> stream​(java.util.Enumeration<T> self)
      Returns a sequential Stream with the specified element(s) as its source. 
       def tokens = new StringTokenizer('one two')
 assert tokens.stream().toList() == ['one', 'two']
      Since:
      3.0.0

    • stream

      public static <T> java.util.stream.Stream<T> stream​(java.lang.Iterable<T> self)
      Returns a sequential Stream with the specified element(s) as its source. 
       class Items implements Iterable {
   Iterator iterator() {
     ['one', 'two'].iterator()
   }
 }
 def items = new Items()
 assert items.stream().toList() == ['one', 'two']
      Since:
      3.0.0

    • stream

      public static <T> java.util.stream.Stream<T> stream​(java.util.Iterator<T> self)
      Returns a sequential Stream with the specified element(s) as its source. 
       [].iterator().stream().toList().isEmpty()
 ['one', 'two'].iterator().stream().toList() == ['one', 'two']
      Since:
      3.0.0

    • stream

      public static <T> java.util.stream.Stream<T> stream​(java.util.Spliterator<T> self)
      Returns a sequential Stream with the specified element(s) as its source. 
       [].spliterator().stream().toList().isEmpty()
 ['one', 'two'].spliterator().stream().toList() == ['one', 'two']
      Since:
      3.0.0

    • stream

      public static <T> java.util.stream.Stream<T> stream​(java.util.Optional<T> self)
      If a value is present in the Optional, returns a Stream with the value as its source or else an empty stream.
      Since:
      3.0.0

    • stream

      public static java.util.stream.IntStream stream​(java.util.OptionalInt self)
      If a value is present in the OptionalInt, returns an IntStream with the value as its source or else an empty stream.
      Since:
      3.0.0

    • stream

      public static java.util.stream.LongStream stream​(java.util.OptionalLong self)
      If a value is present in the OptionalLong, returns a LongStream with the value as its source or else an empty stream.
      Since:
      3.0.0

    • stream

      public static java.util.stream.DoubleStream stream​(java.util.OptionalDouble self)
      If a value is present in the OptionalDouble, returns a DoubleStream with the value as its source or else an empty stream.
      Since:
      3.0.0

    • orOptional

      public static <T> java.util.Optional<T> orOptional​(java.util.Optional<T> self, java.util.function.Supplier<? extends java.util.Optional<? extends T>> supplier)
      Provide similar functionality to JDK9 or on JDK8.
      Since:
      3.0.6