ariba.util.fieldtype
Class NullTypeInfo

java.lang.Object
  ariba.util.fieldtype.NullTypeInfo

All Implemented Interfaces:

TypeInfo

public class NullTypeInfo
extends java.lang.Object
implements TypeInfo

Field Summary

static NullTypeInfo

instance

Fields inherited from interface ariba.util.fieldtype.TypeInfo

AccessibilityPrivate, AccessibilityPublic, AccessibilitySafe

Constructor Summary

NullTypeInfo()

Method Summary

int	getAccessibility() Return the accessiblity code of this type.
java.util.Set	getAllMethods(TypeRetriever retriever) Get all methods belong to this type.
TypeInfo	getElementType() If this type is a collection of element type, this method returns the TypeInfo of the element type.
TypeInfo	getElementTypeInfo(TypeRetriever retriever)
FieldInfo	getField(TypeRetriever retriever, java.lang.String name) Get the field belongs to this type.
java.lang.String	getImplementationName() Get the implementation name.
MethodInfo	getMethodForName(TypeRetriever retriever, java.lang.String name, java.util.List<java.lang.String> parameters, boolean staticOnly) Get the method belongs to this type.
java.lang.String	getName() Get the type name.
PropertyResolver	getPropertyResolver() Create a PropertyResolver that can be used to resolve property name.
boolean	isAssignableFrom(TypeInfo other) This method tests if this type is asssignable from other type.
boolean	isCollection()
boolean	isCompatible(TypeInfo other) This method returns true if one type is assignable to another.
boolean	isWideningTypeOf(TypeInfo other) This method returns true if one type can be widening to another.

Methods inherited from class java.lang.Object

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

Field Detail

instance

public static final NullTypeInfo instance

Constructor Detail

NullTypeInfo

public NullTypeInfo()

Method Detail

getName

public java.lang.String getName()

Description copied from interface: TypeInfo

Get the type name.

Specified by:

getName in interface TypeInfo

Returns:

the name of the type

getImplementationName

public java.lang.String getImplementationName()

Description copied from interface: TypeInfo

Get the implementation name.

Specified by:

getImplementationName in interface TypeInfo

Returns:

the implementation name of the type. It is typically the class name of the type.

getElementType

public TypeInfo getElementType()

Description copied from interface: TypeInfo

If this type is a collection of element type, this method returns the TypeInfo of the element type. Otherwise, this method return false.

Specified by:

getElementType in interface TypeInfo

Returns:

the TypeInfo of element type. Otherwise, return null.

getAccessibility

public int getAccessibility()

Description copied from interface: TypeInfo

Return the accessiblity code of this type.

Specified by:

getAccessibility in interface TypeInfo

Returns:

Return the value of AccessibilityPrivate, AccessibilityPublic, or AccessibilitySafe.

isCollection

public boolean isCollection()

isAssignableFrom

public boolean isAssignableFrom(TypeInfo other)

Description copied from interface: TypeInfo

This method tests if this type is asssignable from other type. This method should also handle auto-boxing and auto-unboxing for primitive types.

Specified by:

isAssignableFrom in interface TypeInfo

Parameters:

other - - the type to assign to this type.

Returns:

true if the test condition passes.

isWideningTypeOf

public boolean isWideningTypeOf(TypeInfo other)

Description copied from interface: TypeInfo

This method returns true if one type can be widening to another. This typically checks using referencing widening where this type is a superclass of other type. For primitive type, this method can also return true if the other type can be promoted to this type using java primitive widening. This method should also handle auto-boxing and auto-unboxing for primitive types.

Specified by:

isWideningTypeOf in interface TypeInfo

Parameters:

other - - the other type to compare with this type.

Returns:

true if the test condition passes.

isCompatible

public boolean isCompatible(TypeInfo other)

Description copied from interface: TypeInfo

This method returns true if one type is assignable to another. This implies that one type is convertible to another through reference widening or narrowing. For primitive type, this method can also return true if the two types can be promoted into a common type. This method should also handle auto-boxing and auto-unboxing for primitive types.

Specified by:

isCompatible in interface TypeInfo

Parameters:

other - - the other type to compare with this type.

Returns:

true if the test condition passes.

getField

public FieldInfo getField(TypeRetriever retriever,
                          java.lang.String name)

Description copied from interface: TypeInfo

Get the field belongs to this type.

Specified by:

getField in interface TypeInfo

Parameters:

retriever - - A TypeRetriever for retriever type information.

name - - the name of the field

Returns:

A FieldInfo object representing the field.

getMethodForName

public MethodInfo getMethodForName(TypeRetriever retriever,
                                   java.lang.String name,
                                   java.util.List<java.lang.String> parameters,
                                   boolean staticOnly)

Description copied from interface: TypeInfo

Get the method belongs to this type.

Specified by:

getMethodForName in interface TypeInfo

Parameters:

retriever - - A TypeRetriever for retriever type information.

name - - the name of the method

parameters - - list of parameter type names

staticOnly - will be true when used in a class static context such as className.staticMethod(), will be false for non static usages e.g. instance.staticMethod() or instance.nonStaticMethod()

Returns:

A MethodInfo object representing the method.

getAllMethods

public java.util.Set getAllMethods(TypeRetriever retriever)

Description copied from interface: TypeInfo

Get all methods belong to this type.

Specified by:

getAllMethods in interface TypeInfo

Parameters:

retriever - - A TypeRetriever for retriever type information.

Returns:

A Set of MethodInfo objects representing all methods.

getElementTypeInfo

public TypeInfo getElementTypeInfo(TypeRetriever retriever)

getPropertyResolver

public PropertyResolver getPropertyResolver()

Description copied from interface: TypeInfo

Create a PropertyResolver that can be used to resolve property name.

Specified by:

getPropertyResolver in interface TypeInfo

Returns:

A PropertyResovler