NullObject (Groovy 5.0.0-SNAPSHOT)

org.codehaus.groovy.runtime.NullObject

public class NullObject
extends GroovyObjectSupport

Methods Summary

Methods
Type Params	Return Type	Name and description
	`public boolean`	`asBoolean()` A null object coerces to false.
	`public Object`	`asType(Class c)` Type conversion method for null.
	`public Object`	`clone()` Since this is implemented as a singleton, avoid the use of the clone method.
	`public boolean`	`equals(Object o)` null is only equal to null.
	`public static NullObject`	`getNullObject()` Returns the NullObject reference.
	`public Object`	`getProperty(String name)` Tries to get a property on null, which fails except for "class" and "metaClass".
	`public int`	`hashCode()` Returns: never
	`public Object`	`invokeMethod(String name, Object arguments)` Tries to invoke a method on null, which fails.
	`public boolean`	`is(Object o)` Tests for equal references.
	`public Iterator`	`iterator()` iterator() method to be able to iterate on null.
	`public Object`	`plus(Object o)` Fallback for `null+null`.
	`public Object`	`plus(String s)` Allows to add a String to null.
	`public void`	`setProperty(String name, Object value)` Tries to set a property on null, which fails.
	`public String`	`toString()`
`<T>`	`public T`	`with(Closure<T> closure)` Allows the closure to be called for NullObject.

Inherited Methods Summary

Inherited Methods
Methods inherited from class	Name
`class GroovyObjectSupport`	`getMetaClass, setMetaClass`

- Method Detail
  - public boolean asBoolean()
    
    A null object coerces to false.
    Returns:
    false
  - public Object asType(Class c)
    
    Type conversion method for null.
    Returns:
    null
  - @Override
    public Object clone()
    
    Since this is implemented as a singleton, avoid the use of the clone method.
    throws:
    NullPointerException
    
    Returns:
    never
  - @Override
    public boolean equals(Object o)
    
    null is only equal to null.
    Parameters:
    o - the reference object with which to compare
    Returns:
    true if this object is the same as the to argument
  - public static NullObject getNullObject()
    
    Returns the NullObject reference.
    Returns:
    the null object
  - @Override
    public Object getProperty(String name)
    
    Tries to get a property on null, which fails except for "class" and "metaClass".
    throws:
    NullPointerException
    
    Returns:
    never
  - @Override
    public int hashCode()
    
    throws:
    NullPointerException
    
    Returns:
    never
  - @Override
    public Object invokeMethod(String name, Object arguments)
    
    Tries to invoke a method on null, which fails.
    throws:
    NullPointerException
    
    Returns:
    never
  - public boolean is(Object o)
    
    Tests for equal references.
    Returns:
    true if object is null
  - public Iterator iterator()
    
    iterator() method to be able to iterate on null. Note: this part is from Invoker
    Returns:
    an empty iterator
  - public Object plus(Object o)
    
    Fallback for null+null. The plus(java.lang.String) variant catches the case of adding a non-null String to null.
    throws:
    NullPointerException
    
    Returns:
    never
  - public Object plus(String s)
    
    Allows to add a String to null. The result is concatenated String of the result of calling toString() on this object and the String in the parameter.
    Returns:
    the concatenated string
  - @Override
    public void setProperty(String name, Object value)
    
    Tries to set a property on null, which fails.
    throws:
    NullPointerException
  - @Override
    public String toString()
  - <T> @Deprecated(since = "5.0.0")
    public T with(Closure<T> closure)
    
    Allows the closure to be called for NullObject.
    Parameters:
    closure - the closure to call on the object
    Returns:
    result of calling the closure

Summary:
Method

| Detail:
Method

[Java] Class NullObject

Methods Summary

Inherited Methods Summary

Method Detail

public boolean asBoolean()

public Object asType(Class c)

@Override
public Object clone()

@Override
public boolean equals(Object o)

public static NullObject getNullObject()

@Override
public Object getProperty(String name)

@Override
public int hashCode()

@Override
public Object invokeMethod(String name, Object arguments)

public boolean is(Object o)

public Iterator iterator()

public Object plus(Object o)

public Object plus(String s)

@Override
public void setProperty(String name, Object value)

@Override
public String toString()

<T> @Deprecated(since = "5.0.0")
public T with(Closure<T> closure)

[Java] Class NullObject

Methods Summary

Inherited Methods Summary

Method Detail

public boolean asBoolean()

public Object asType(Class c)

@Overridepublic Object clone()

@Overridepublic boolean equals(Object o)

public static NullObject getNullObject()

@Overridepublic Object getProperty(String name)

@Overridepublic int hashCode()

@Overridepublic Object invokeMethod(String name, Object arguments)

public boolean is(Object o)

public Iterator iterator()

public Object plus(Object o)

public Object plus(String s)

@Overridepublic void setProperty(String name, Object value)

@Overridepublic String toString()

<T> @Deprecated(since = "5.0.0")public T with(Closure<T> closure)

@Override
public Object clone()

@Override
public boolean equals(Object o)

@Override
public Object getProperty(String name)

@Override
public int hashCode()

@Override
public Object invokeMethod(String name, Object arguments)

@Override
public void setProperty(String name, Object value)

@Override
public String toString()

<T> @Deprecated(since = "5.0.0")
public T with(Closure<T> closure)