FieldMetaData (libthrift 0.15.0 API)

java.lang.Object
- org.apache.thrift.meta_data.FieldMetaData

All Implemented Interfaces:

java.io.Serializable
```
public class FieldMetaData
extends java.lang.Object
implements java.io.Serializable
```
This class is used to store meta data about thrift fields. Every field in a a struct should have a corresponding instance of this class describing it. The meta data is registered by ALL Thrift struct classes via a static {...} initializer block in the generated Thrift code. Since different threads could be initializing different Thrift classes, calls to the public static methods of this class could be racy. All methods of this class should be made thread safe.

See Also:

Serialized Form

Field Summary

Fields
Modifier and Type Field Description

java.lang.String fieldName

byte requirementType

FieldValueMetaData valueMetaData

Constructor Summary

Constructors
Constructor Description

FieldMetaData(java.lang.String name, byte req, FieldValueMetaData vMetaData)

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static void`	`addStructMetaDataMap(java.lang.Class<? extends TBase> sClass, java.util.Map<? extends TFieldIdEnum,FieldMetaData> map)`
`static java.util.Map<? extends TFieldIdEnum,FieldMetaData>`	`getStructMetaDataMap(java.lang.Class<? extends TBase> sClass)`	Returns a map with metadata (i.e. instances of FieldMetaData) that describe the fields of the given class.

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

Field Detail

fieldName

public final java.lang.String fieldName

requirementType
```
public final byte requirementType
```

valueMetaData

public final FieldValueMetaData valueMetaData

Constructor Detail

FieldMetaData

public FieldMetaData(java.lang.String name,
                     byte req,
                     FieldValueMetaData vMetaData)

Method Detail
- addStructMetaDataMap
```
public static void addStructMetaDataMap(java.lang.Class<? extends TBase> sClass,
                                        java.util.Map<? extends TFieldIdEnum,FieldMetaData> map)
```
- getStructMetaDataMap
```
public static java.util.Map<? extends TFieldIdEnum,FieldMetaData> getStructMetaDataMap(java.lang.Class<? extends TBase> sClass)
```
  Returns a map with metadata (i.e. instances of FieldMetaData) that describe the fields of the given class.
  
  Parameters:
  
  sClass - The TBase class for which the metadata map is requested. It is not guaranteed that sClass will have been statically initialized before this method is called. A racy call to addStructMetaDataMap(Class, Map) from a different thread during static initialization of the Thrift class is possible.