Package org.codehaus.groovy.vmplugin.v8
Class PluginDefaultGroovyMethods
- java.lang.Object
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- org.codehaus.groovy.vmplugin.v8.PluginDefaultGroovyMethods
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public class PluginDefaultGroovyMethods extends Object
Defines new Groovy methods which appear on normal JDK 8 classes inside the Groovy environment.- Since:
- 2.5.0
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static boolean
asBoolean(Optional<?> optional)
Coerce an Optional instance to a boolean value.static <S,T>
Future<T>collect(Future<S> self, Closure<T> transform)
Returns a Future asynchronously returning a transformed result.static <S,T>
Optional<T>collect(Optional<S> self, Closure<T> transform)
If the optional contains a value, returns an optional containing the transformed value obtained using thetransform
closure or otherwise an empty optional.static Stream<Boolean>
stream(boolean[] self)
Returns a sequentialStream
with the specified array as its source.static Stream<Byte>
stream(byte[] self)
Returns a sequentialStream
with the specified array as its source.static Stream<Character>
stream(char[] self)
Returns a sequentialStream
with the specified array as its source.static Stream<Double>
stream(double[] self)
Returns a sequentialStream
with the specified array as its source.static Stream<Float>
stream(float[] self)
Returns a sequentialStream
with the specified array as its source.static Stream<Integer>
stream(int[] self)
Returns a sequentialStream
with the specified array as its source.static Stream<Long>
stream(long[] self)
Returns a sequentialStream
with the specified array as its source.static Stream<Short>
stream(short[] self)
Returns a sequentialStream
with the specified array as its source.static <T> Stream<T>
stream(T[] self)
Returns a sequentialStream
with the specified array as its source.static <T> List<T>
toList(BaseStream<T,? extends BaseStream> stream)
Accumulates the elements of stream into a new List.static <T> List<T>
toList(Stream<T> stream)
Accumulates the elements of stream into a new List.static <T> Set<T>
toSet(BaseStream<T,? extends BaseStream> stream)
Accumulates the elements of stream into a new Set.static <T> Set<T>
toSet(Stream<T> stream)
Accumulates the elements of stream into a new Set.
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Method Detail
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asBoolean
public static boolean asBoolean(Optional<?> optional)
Coerce an Optional instance to a boolean value.- Parameters:
optional
- the Optional- Returns:
true
if a value is present, otherwisefalse
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collect
public static <S,T> Optional<T> collect(Optional<S> self, Closure<T> transform)
If the optional contains a value, returns an optional containing the transformed value obtained using thetransform
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 Optionaltransform
- 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
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collect
public static <S,T> Future<T> collect(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 Futuretransform
- the closure used to transform the Future value- Returns:
- a Future allowing the transformed value to be obtained asynchronously
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toList
public static <T> List<T> toList(Stream<T> stream)
Accumulates the elements of stream into a new List.- Type Parameters:
T
- the type of element- Parameters:
stream
- the Stream- Returns:
- a new
java.util.List
instance
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toSet
public static <T> Set<T> toSet(Stream<T> stream)
Accumulates the elements of stream into a new Set.- Type Parameters:
T
- the type of element- Parameters:
stream
- the Stream- Returns:
- a new
java.util.Set
instance
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toList
public static <T> List<T> toList(BaseStream<T,? extends BaseStream> stream)
Accumulates the elements of stream into a new List.- Type Parameters:
T
- the type of element- Parameters:
stream
- thejava.util.stream.BaseStream
- Returns:
- a new
java.util.List
instance
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toSet
public static <T> Set<T> toSet(BaseStream<T,? extends BaseStream> stream)
Accumulates the elements of stream into a new Set.- Type Parameters:
T
- the type of element- Parameters:
stream
- thejava.util.stream.BaseStream
- Returns:
- a new
java.util.Set
instance
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stream
public static <T> Stream<T> stream(T[] self)
Returns a sequentialStream
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
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stream
public static Stream<Integer> stream(int[] self)
Returns a sequentialStream
with the specified array as its source.- Parameters:
self
- The array, assumed to be unmodified during use- Returns:
- a
Stream
for the array
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stream
public static Stream<Long> stream(long[] self)
Returns a sequentialStream
with the specified array as its source.- Parameters:
self
- The array, assumed to be unmodified during use- Returns:
- a
Stream
for the array
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stream
public static Stream<Double> stream(double[] self)
Returns a sequentialStream
with the specified array as its source.- Parameters:
self
- The array, assumed to be unmodified during use- Returns:
- a
Stream
for the array
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stream
public static Stream<Character> stream(char[] self)
Returns a sequentialStream
with the specified array as its source.- Parameters:
self
- The array, assumed to be unmodified during use- Returns:
- a
Stream
for the array
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stream
public static Stream<Byte> stream(byte[] self)
Returns a sequentialStream
with the specified array as its source.- Parameters:
self
- The array, assumed to be unmodified during use- Returns:
- a
Stream
for the array
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stream
public static Stream<Short> stream(short[] self)
Returns a sequentialStream
with the specified array as its source.- Parameters:
self
- The array, assumed to be unmodified during use- Returns:
- a
Stream
for the array
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stream
public static Stream<Boolean> stream(boolean[] self)
Returns a sequentialStream
with the specified array as its source.- Parameters:
self
- The array, assumed to be unmodified during use- Returns:
- a
Stream
for the array
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