Package org.codehaus.groovy.runtime
Class ComposedClosure<V>
- java.lang.Object
-
- groovy.lang.GroovyObjectSupport
-
- groovy.lang.Closure<V>
-
- org.codehaus.groovy.runtime.ComposedClosure<V>
-
- All Implemented Interfaces:
GroovyCallable<V>,GroovyObject,java.io.Serializable,java.lang.Cloneable,java.lang.Runnable,java.util.concurrent.Callable<V>
public final class ComposedClosure<V> extends Closure<V>
A wrapper for Closure to support composition. Normally used only internally through therightShift()andleftShift()methods onClosure.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.&toUpperCaseassert 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- See Also:
- Serialized Form
-
-
Field Summary
-
Fields inherited from class groovy.lang.Closure
DELEGATE_FIRST, DELEGATE_ONLY, DONE, IDENTITY, maximumNumberOfParameters, OWNER_FIRST, OWNER_ONLY, parameterTypes, SKIP, TO_SELF
-
-
Constructor Summary
Constructors Constructor Description ComposedClosure(Closure first, Closure<V> second)
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Vcall(java.lang.Object... args)java.lang.Objectclone()java.lang.ObjectdoCall(java.lang.Object... args)java.lang.ObjectgetDelegate()java.lang.Class[]getParameterTypes()intgetResolveStrategy()Gets the strategy which the closure uses to resolve methods and propertiesvoidsetDelegate(java.lang.Object delegate)Allows the delegate to be changed such as when performing markup buildingvoidsetResolveStrategy(int resolveStrategy)Sets the strategy which the closure uses to resolve property references and methods.-
Methods inherited from class groovy.lang.Closure
asWritable, call, call, curry, curry, dehydrate, getDirective, getMaximumNumberOfParameters, getOwner, getProperty, getThisObject, isCase, leftShift, leftShift, memoize, memoizeAtLeast, memoizeAtMost, memoizeBetween, ncurry, ncurry, rcurry, rcurry, rehydrate, rightShift, run, setDirective, setProperty, throwRuntimeException, trampoline, trampoline
-
Methods inherited from class groovy.lang.GroovyObjectSupport
getMetaClass, invokeMethod, setMetaClass
-
-
-
-
Method Detail
-
setDelegate
public void setDelegate(java.lang.Object delegate)
Description copied from class:ClosureAllows the delegate to be changed such as when performing markup building- Overrides:
setDelegatein classClosure<V>- Parameters:
delegate- the new delegate
-
getDelegate
public java.lang.Object getDelegate()
- Overrides:
getDelegatein classClosure<V>- Returns:
- the delegate Object to which method calls will go which is typically the outer class when the closure is constructed
-
setResolveStrategy
public void setResolveStrategy(int resolveStrategy)
Description copied from class:ClosureSets the strategy which the closure uses to resolve property references and methods. The default is Closure.OWNER_FIRST- Overrides:
setResolveStrategyin classClosure<V>- Parameters:
resolveStrategy- The resolve strategy to set- See Also:
Closure.DELEGATE_FIRST,Closure.DELEGATE_ONLY,Closure.OWNER_FIRST,Closure.OWNER_ONLY,Closure.TO_SELF
-
getResolveStrategy
public int getResolveStrategy()
Description copied from class:ClosureGets the strategy which the closure uses to resolve methods and properties- Overrides:
getResolveStrategyin classClosure<V>- Returns:
- The resolve strategy
- See Also:
Closure.DELEGATE_FIRST,Closure.DELEGATE_ONLY,Closure.OWNER_FIRST,Closure.OWNER_ONLY,Closure.TO_SELF
-
getParameterTypes
public java.lang.Class[] getParameterTypes()
- Overrides:
getParameterTypesin classClosure<V>- Returns:
- the parameter types of the longest doCall method of this closure
-
doCall
public java.lang.Object doCall(java.lang.Object... args)
-
-