Package org.codehaus.groovy.runtime

Class CurriedClosure<V>

java.lang.Object

groovy.lang.GroovyObjectSupport

groovy.lang.Closure<V>

org.codehaus.groovy.runtime.CurriedClosure<V>

All Implemented Interfaces:

GroovyCallable<V>, GroovyObject, Serializable, Cloneable, Runnable, Callable<V>

public final class CurriedClosure<V>
extends Closure<V>

A wrapper for Closure to support currying. Normally used only internally through the curry(), rcurry() or ncurry() methods on Closure.

Typical usages:

 // normal usage
 def unitAdder = { first, second, unit -> "${first + second} $unit" }
 assert unitAdder(10, 15, "minutes") == "25 minutes"
 assert unitAdder.curry(60)(15, "minutes") == "75 minutes"
 def minuteAdder = unitAdder.rcurry("minutes")
 assert minuteAdder(15, 60) == "75 minutes"

 // explicit creation
 import org.codehaus.groovy.runtime.CurriedClosure
 assert new CurriedClosure(unitAdder, 45)(15, "minutes") == "60 minutes"
 assert new CurriedClosure(unitAdder, "six", "ty")("minutes") == "sixty minutes"
 

Notes:

• Caters for Groovy's lazy (rcurry) and eager (ncurry) calculation of argument position

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
CurriedClosure(int index, Closure<V> uncurriedClosure, Object... arguments)
CurriedClosure(Closure<V> uncurriedClosure, Object... arguments)

Method Summary

Modifier and Type	Method	Description
Object	clone()
Object	getDelegate()
Closure<V>	getOwner()
Class[]	getParameterTypes()
int	getResolveStrategy()	Gets the strategy which the closure uses to resolve methods and properties
Object[]	getUncurriedArguments(Object... arguments)
void	setDelegate(Object delegate)	Allows the delegate to be changed such as when performing markup building
void	setResolveStrategy(int resolveStrategy)	Sets the strategy which the closure uses to resolve property references and methods.

Methods inherited from class groovy.lang.Closure

andThen, andThenSelf, andThenSelf, asWritable, call, call, call, compose, composeSelf, composeSelf, curry, curry, dehydrate, getDirective, getMaximumNumberOfParameters, 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, setMetaClass

Methods inherited from class java.lang.Object

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

Methods inherited from interface groovy.lang.GroovyObject

invokeMethod

Constructor Details

CurriedClosure

public CurriedClosure(int index,
 Closure<V> uncurriedClosure,
 Object... arguments)

Parameters:

index - the position where the parameters should be injected (-ve for lazy)

uncurriedClosure - the closure to be called after the curried parameters are injected

arguments - the supplied parameters

CurriedClosure

public CurriedClosure(Closure<V> uncurriedClosure,
 Object... arguments)

Method Details

getUncurriedArguments

public Object[] getUncurriedArguments(Object... arguments)

setDelegate

public void setDelegate(Object delegate)

Description copied from class: Closure

Allows the delegate to be changed such as when performing markup building

Overrides:

setDelegate in class Closure<V>

Parameters:

delegate - the new delegate

getDelegate

public Object getDelegate()

Overrides:

getDelegate in class Closure<V>

Returns:

the delegate Object to which method calls will go which is typically the outer class when the closure is constructed

getOwner

public Closure<V> getOwner()

Overrides:

getOwner in class Closure<V>

Returns:

the owner 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: Closure

Sets the strategy which the closure uses to resolve property references and methods. The default is Closure.OWNER_FIRST

Overrides:

setResolveStrategy in class Closure<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: Closure

Gets the strategy which the closure uses to resolve methods and properties

Overrides:

getResolveStrategy in class Closure<V>

Returns:

The resolve strategy

See Also:

• Closure.DELEGATE_FIRST
• Closure.DELEGATE_ONLY
• Closure.OWNER_FIRST
• Closure.OWNER_ONLY
• Closure.TO_SELF

clone

public Object clone()

Overrides:

clone in class Closure<V>

getParameterTypes

public Class[] getParameterTypes()

Overrides:

getParameterTypes in class Closure<V>

Returns:

the parameter types of the longest doCall method of this closure