UserDefinedType (Flink : Table : Common 2.0-preview1 API)

java.lang.Object
- org.apache.flink.table.types.logical.LogicalType
- - org.apache.flink.table.types.logical.UserDefinedType

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

DistinctType, StructuredType
```
@PublicEvolving
public abstract class UserDefinedType
extends LogicalType
```
Logical type of a user-defined representation for one or more built-in types. A user-defined type is either a distinct type or a structured type.
A UserDefinedType instance is the result of a catalog lookup or an anonymous, inline definition (for structured types only). Therefore, the serialized string representation is a unique ObjectIdentifier (if registered) or a representation does not exist (if unregistered).
NOTE: Compared to the SQL standard, this class and subclasses are incomplete. We might add new features such as method declarations in the future.

See Also:

DistinctType, StructuredType, Serialized Form

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`String`	`asSerializableString()`	Returns a string that fully serializes this instance.
`boolean`	`equals(Object o)`
`Optional<String>`	`getDescription()`
`Optional<ObjectIdentifier>`	`getObjectIdentifier()`
`int`	`hashCode()`
`boolean`	`isFinal()`

Methods inherited from class org.apache.flink.table.types.logical.LogicalType
accept, asSummaryString, conversionSet, copy, copy, getChildren, getDefaultConversion, getTypeRoot, is, is, isAnyOf, isAnyOf, isNullable, supportsInputConversion, supportsOutputConversion, toString, withNullability

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Method Detail
  - getObjectIdentifier
```
public Optional<ObjectIdentifier> getObjectIdentifier()
```
  - isFinal
```
public boolean isFinal()
```
  - getDescription
```
public Optional<String> getDescription()
```
  - asSerializableString
```
public String asSerializableString()
```
    Description copied from class: LogicalType
    
    Returns a string that fully serializes this instance. The serialized string can be used for transmitting or persisting a type.
    See LogicalTypeParser for the reverse operation.
    
    Specified by:
    
    asSerializableString in class LogicalType
    
    Returns:
    
    detailed string for transmission or persistence
  - equals
```
public boolean equals(Object o)
```
    Overrides:
    
    equals in class LogicalType
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class LogicalType