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java.lang.Objectgroovy.lang.GroovyObjectSupport
groovy.lang.Closure
public abstract class Closure
Represents any closure object in Groovy.
Groovy allows instances of Closures to be called in a short form. For example:def a = 1 def c = {a} assert c() == 1To be able to use a Closure in this way with your own subclass, you need to provide a doCall method with any signature you want to. This ensures that
getMaximumNumberOfParameters()
and
getParameterTypes()
will work too without any
additional code. If no doCall method is provided a
closure must be used in its long form like
def a = 1 def c = {a} assert c.call() == 1
Field Summary | |
---|---|
static int |
DELEGATE_FIRST
With this resolveStrategy set the closure will attempt to resolve property references to the delegate first |
static int |
DELEGATE_ONLY
With this resolveStrategy set the closure will resolve property references to the delegate only and entirely bypass the owner |
static int |
DONE
|
protected int |
maximumNumberOfParameters
|
static int |
OWNER_FIRST
With this resolveStrategy set the closure will attempt to resolve property references to the owner first |
static int |
OWNER_ONLY
With this resolveStrategy set the closure will resolve property references to the owner only and not call the delegate at all |
static int |
SKIP
|
static int |
TO_SELF
With this resolveStrategy set the closure will resolve property references to itself and go through the usual MetaClass look-up process. |
Constructor Summary | |
---|---|
Closure(Object owner)
|
|
Closure(Object owner,
Object thisObject)
|
Method Summary | |
---|---|
Closure |
asWritable()
|
Object |
call()
Invokes the closure without any parameters, returning any value if applicable. |
Object |
call(Object arguments)
Invokes the closure, returning any value if applicable. |
Object |
call(Object[] args)
|
Object |
clone()
|
Closure |
curry(Object[] arguments)
Support for closure currying |
Object |
getDelegate()
|
int |
getDirective()
|
int |
getMaximumNumberOfParameters()
|
Object |
getOwner()
|
Class[] |
getParameterTypes()
|
Object |
getProperty(String property)
|
int |
getResolveStrategy()
Gets the strategy which the closure users to resolve methods and properties |
Object |
getThisObject()
|
boolean |
isCase(Object candidate)
|
void |
run()
|
void |
setDelegate(Object delegate)
Allows the delegate to be changed such as when performing markup building |
void |
setDirective(int directive)
|
void |
setProperty(String property,
Object newValue)
Sets the given property to the new value |
void |
setResolveStrategy(int resolveStrategy)
Sets the strategy which the closure uses to resolve property references. |
protected static Object |
throwRuntimeException(Throwable throwable)
|
Methods inherited from class groovy.lang.GroovyObjectSupport |
---|
getMetaClass, invokeMethod, setMetaClass |
Methods inherited from class java.lang.Object |
---|
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
---|
public static final int OWNER_FIRST
public static final int DELEGATE_FIRST
public static final int OWNER_ONLY
public static final int DELEGATE_ONLY
public static final int TO_SELF
protected int maximumNumberOfParameters
public static final int DONE
public static final int SKIP
Constructor Detail |
---|
public Closure(Object owner, Object thisObject)
public Closure(Object owner)
Method Detail |
---|
public void setResolveStrategy(int resolveStrategy)
resolveStrategy
- The resolve strategy to setDELEGATE_FIRST
,
DELEGATE_ONLY
,
OWNER_FIRST
,
OWNER_ONLY
,
TO_SELF
public int getResolveStrategy()
DELEGATE_FIRST
,
DELEGATE_ONLY
,
OWNER_FIRST
,
OWNER_ONLY
,
TO_SELF
public Object getThisObject()
public Object getProperty(String property)
getProperty
in interface GroovyObject
getProperty
in class GroovyObjectSupport
public void setProperty(String property, Object newValue)
GroovyObject
setProperty
in interface GroovyObject
setProperty
in class GroovyObjectSupport
public boolean isCase(Object candidate)
public Object call()
public Object call(Object[] args)
public Object call(Object arguments)
arguments
- could be a single value or a List of values
protected static Object throwRuntimeException(Throwable throwable)
public Object getOwner()
public Object getDelegate()
public void setDelegate(Object delegate)
delegate
- the new delegatepublic Class[] getParameterTypes()
public int getMaximumNumberOfParameters()
public Closure asWritable()
public void run()
run
in interface Runnable
public Closure curry(Object[] arguments)
arguments
- the arguments to bind
public Object clone()
clone
in class Object
public int getDirective()
public void setDirective(int directive)
directive
- The directive to set.
|
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