[Java] Class ComposedClosure<V>
- org.codehaus.groovy.runtime.ComposedClosure
A wrapper for Closure to support composition. Normally used only internally through the rightShift()
and leftShift()
methods on Closure
.
Typical usages:
def twice = { a->
a * 2 } def inc = { b->
b + 1 } def f = { x->
twice(inc(x)) } // longhand def g = inc>>
twice def h = twice<<
inc assert f(10) == 22 assert g(10) == 22 assert h(10) == 22 def s2c = { it.chars[0] }def p = Integer.&toHexString >> s2c >> Character.&toUpperCase
assert p(15) == 'F' def multiply = { a, b->
a * b } def identity = { a->
[a, a] } def sq = identity>>
multiply assert (1..5).collect{ sq(it) } == [1, 4, 9, 16, 25] def add3 = { a, b, c->
a + b + c } def add2plus10 = add3.curry(10) def multBoth = { a, b, c->
[a*c, b*c] } def twiceBoth = multBoth.rcurry(2) def twiceBothPlus10 = twiceBoth>>
add2plus10 assert twiceBothPlus10(5, 10) == 40
Fields inherited from class | Fields |
---|---|
class Closure | DELEGATE_FIRST, DELEGATE_ONLY, DONE, IDENTITY, OWNER_FIRST, OWNER_ONLY, SKIP, TO_SELF, maximumNumberOfParameters, parameterTypes |
Properties Summary
Type | Name and description |
---|---|
Object |
delegate |
int |
resolveStrategy |
Constructor Summary
Constructor and description |
---|
ComposedClosure
(Closure first, Closure<V> second) |
Methods Summary
Type Params | Return Type | Name and description |
---|---|---|
V |
call(Object... args) | |
Object |
clone() | |
Object |
doCall(Object... args) | |
Object |
getDelegate() | |
Class[] |
getParameterTypes() | |
int |
getResolveStrategy() | |
void |
setDelegate(Object delegate) | |
void |
setResolveStrategy(int resolveStrategy) |
Inherited Methods Summary
Methods inherited from class | Name |
---|---|
class Closure | asWritable, call, call, call, clone, curry, curry, dehydrate, getDelegate, getDirective, getMaximumNumberOfParameters, getOwner, getParameterTypes, getProperty, getResolveStrategy, getThisObject, isCase, leftShift, leftShift, memoize, memoizeAtLeast, memoizeAtMost, memoizeBetween, ncurry, ncurry, rcurry, rcurry, rehydrate, rightShift, run, setDelegate, setDirective, setProperty, setResolveStrategy, throwRuntimeException, trampoline, trampoline |
class GroovyObjectSupport | getMetaClass, getProperty, invokeMethod, setMetaClass, setProperty |
Property Detail
Object delegate
int resolveStrategy
Constructor Detail
public ComposedClosure(Closure first, Closure<V> second)
Method Detail
@Override public V call(Object... args)
public Object clone()
public Object doCall(Object... args)
public Object getDelegate()
public Class[] getParameterTypes()
public int getResolveStrategy()
public void setDelegate(Object delegate)
public void setResolveStrategy(int resolveStrategy)
© 2003-2020 The Apache Software Foundation
Licensed under the Apache license.
https://docs.groovy-lang.org/2.5.14/html/gapi/org/codehaus/groovy/runtime/ComposedClosure.html