Can be any of the following values:

• AUTO_TYPE_COERCION (default)
• ALLOW_TYPE_COERCION
• DISALLOW_TYPE_COERCION

See below for details.

Controls whether sequence bounds are taken into consideration for type assignability.

If false, a sequence with a larger maximum length may not be assigned to a sequence with a smaller maximum length.

If true, sequences and strings in a DataReader type can have a maximum length smaller than that of the DataWriter type. When the length of the sequence in a particular sample is larger than the maximum length, that sample is discarded.

Default: false

Controls whether string bounds are taken into consideration for type assignability. If false, then a string with a larger maximum length may not be assigned to a string with a smaller maximum length.

Default: false.

Controls whether member names are taken into consideration for type assignability.

If false, members with the same ID and different names are not assignable to each other.

If true, members of a type can change their name while keeping their member ID. For example, MyType and MyTypeSpanish are only assignable if ignore_member_names is true:

struct MyType {

    @id(10) int32 x;

    @id(20) int32 angle;

};

struct MyTypeSpanish {

    @id(10) int32 x;

    @id(20) int32 angulo;

};

Default: false

Controls whether type widening is allowed. A type T2 widens a type T1 when T2 contains required members that are not present in T1. If a DataReader of T2 sets prevent_type_widening to true, then the DataReader will not be matched with a DataWriter of T1 because T1 is not assignable to T2.

Default: false

Controls whether type information must be available in order to complete matching between a DataWriter and this DataReader.

If false, matching may occur as long as the type names match. Note that if the types have the same name but are not assignable, DataReaders may fail to deserialize incoming data samples.

Default: false

When set to 1, samples containing an unknown union discriminator can be successfully deserialized to the default discriminator value. For example, given the following two types:

Publisher Type:

@mutable

union MyUnion switch(int32) {
    case 0:
	int32 m1;
    case 1:
	int16 m2;
    case 2:
	double m3;
}; 

Subscriber Type:

@mutable

union MyUnion switch(int32) {
    case 0: 
	int32 m1;
    case 1:
	int16 m2;
}; 

By default, if the DataWriter sends a union with the discriminator set to 2, the DataReader cannot deserialize the sample. However if this property is set to 1, the Subscribing application will receive a sample with the discriminator set to 0 and member m1 set to the default value for an int32 (0). The default discriminator value is defined as the default element if one is specified, otherwise the lowest value associated with any discriminator value. The member identified by the default discriminator is also initialized to its default value.

You can set this property as part of the Property QoS for either the DomainParticipant or the DataReader. If it is set in both the DomainParticipant and DataReader, the value in the DataReader's QoS will be applied.

This functionality is supported both in generated code as well as when using the DynamicData API.

When set to 1 samples containing an unknown enumerator to be successfully deserialized to the default enumeration value. For example, given the following two types:

Publisher Type:

enum MyEnum {
    ONE = 1,
    TWO = 2,
    THREE = 3
};
struct MyType {
    MyEnum m1;
};

Subscriber Type:

enum MyEnum {
    ONE = 1,
    TWO = 2
};
struct MyType {
    MyEnum m1;
};

By default, if the DataWriter sends m1 = THREE, the DataReader cannot deserialize the sample. However if this property is set to 1 then the Subscribing application will receive a sample with m1 = ONE. The default enumeration value is defined as the first declared member of the enumeration.

You can set this property as part of the Property QoS for either the DomainParticipant or the DataReader. If it is set in both the DomainParticipant and DataReader, the value in the DataReader's QoS will be applied.

This functionality is supported both in generated code as well as when using the DynamicData API.

This property has been replaced with ignore_member_names and ignore_enum_literal_names in the TypeConsistencyEnforcementQosPolicy (see 2.3 Type-Consistency Enforcement), but is still supported for compatibility with previous releases. If this property is set, its value supersedes the values in the QosPolicy.