VMware GemFire Java API Reference

ObjectType (Tanzu GemFire 10.2.2)

All Superinterfaces:

DataSerializable, java.io.Serializable

All Known Subinterfaces:

CollectionType, MapType, StructType
```
public interface ObjectType
extends DataSerializable
```
An ObjectType represents the type of an object in a query. An ObjectType is similar to a Class, except unlike a Class it can be extended to add more information such as a subtype for collection Classes, a key type for a map class, or a field information for structs. Note that multiple instances of are allowed of the same type, so ObjectTypes should always be compared using equals.

Since:

GemFire 4.0

See Also:

StructType, CollectionType, MapType

Nested Class Summary
- Nested classes/interfaces inherited from interface org.apache.geode.DataSerializable
  DataSerializable.Replaceable

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`java.lang.String`	`getSimpleClassName()`
`boolean`	`isCollectionType()`	Return true if this is a CollectionType.
`boolean`	`isMapType()`	Return true if this is a MapType
`boolean`	`isStructType()`	Return true if this is a StructType
`java.lang.Class`	`resolveClass()`

Methods inherited from interface org.apache.geode.DataSerializable
fromData, toData

- Method Detail
  - isCollectionType
```
boolean isCollectionType()
```
    Return true if this is a CollectionType. Note that MapTypes, Region types, and array types are also considered CollectionTypes in the context of the query language and therefore return true to this method.
    
    Returns:
    
    whether this is a CollectionType
  - isMapType
```
boolean isMapType()
```
    Return true if this is a MapType
    
    Returns:
    
    whether this is a MapType
  - isStructType
```
boolean isStructType()
```
    Return true if this is a StructType
    
    Returns:
    
    whether this is a StructType
  - getSimpleClassName
```
java.lang.String getSimpleClassName()
```
    Returns:
    
    the simple name for the class this resolves to without including the package
  - resolveClass
```
java.lang.Class resolveClass()
```
    Returns:
    
    the Class that this type corresponds to.