TypeConsistencyKind Class Reference

Kinds of type consistency. More...

Inheritance diagram for TypeConsistencyKind:

Static Public Attributes
static final TypeConsistencyKind	DISALLOW_TYPE_COERCION
	The DataWriter and the DataReader must support the same data type in order for them to communicate.
static final TypeConsistencyKind	ALLOW_TYPE_COERCION
	The DataWriter and the DataReader need not support the same data type in order for them to communicate as long as the DataReader's type is assignable from the DataWriter's type.

Additional Inherited Members
Public Member Functions inherited from Enum
final int	ordinal ()
	The integral value of this enumerated constant.
Object	copy_from (Object src)
final String	name ()
	The name of this enum constant, as declared in the enum declaration.
final String	toString ()
	The string value of this enum constant.
Protected Member Functions inherited from Enum
	Enum (String name, int ordinal)
	The constructor.

Detailed Description

Kinds of type consistency.

QoS:

com.rti.dds.infrastructure.TypeConsistencyEnforcementQosPolicy

Member Data Documentation

final TypeConsistencyKind DISALLOW_TYPE_COERCION

static

The DataWriter and the DataReader must support the same data type in order for them to communicate.

This is the degree of type consistency enforcement required by the OMG DDS Specification prior to the OMG Extensible and Dynamic Topic Types for DDS Specification.

final TypeConsistencyKind ALLOW_TYPE_COERCION

static

The DataWriter and the DataReader need not support the same data type in order for them to communicate as long as the DataReader's type is assignable from the DataWriter's type.

For example, the following two extensible types will be assignable to each other since MyDerivedType contains all the members of MyBaseType (member_1) plus some additional elements (member_2).

struct MyBaseType {
     long member_1;
 };
 
 struct MyDerivedType: MyBaseType {
     long member_2;
 };

Even if MyDerivedType was not explicitly inheriting from MyBaseType the types would still be assignable. For example:

struct MyBaseType {
     long member_1;
 };
 
 struct MyDerivedType {
     long member_1;
     long member_2;
 };

For additional information on type assignability refer to the OMG Extensible and Dynamic Topic Types for DDS Specification.

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