@InterfaceAudience.Public @InterfaceStability.Stable public abstract class AbstractMapWritable extends Object implements Writable, Configurable
| Modifier | Constructor and Description | 
|---|---|
| protected  | AbstractMapWritable()constructor. | 
| Modifier and Type | Method and Description | 
|---|---|
| protected void | addToMap(Class<?> clazz)Add a Class to the maps if it is not already present. | 
| protected void | copy(Writable other)Used by child copy constructors. | 
| protected Class<?> | getClass(byte id)the Class class for the specified id. | 
| Configuration | getConf()Return the configuration used by this object. | 
| protected byte | getId(Class<?> clazz)get id. | 
| void | readFields(DataInput in)Deserialize the fields of this object from  in. | 
| void | setConf(Configuration conf)Set the configuration to be used by this object. | 
| void | write(DataOutput out)Serialize the fields of this object to  out. | 
protected void addToMap(Class<?> clazz)
clazz - clazz.protected Class<?> getClass(byte id)
id - id.protected byte getId(Class<?> clazz)
clazz - clazz.protected void copy(Writable other)
other - other.public Configuration getConf()
ConfigurablegetConf in interface Configurablepublic void setConf(Configuration conf)
ConfigurablesetConf in interface Configurableconf - the conf to setpublic void write(DataOutput out) throws IOException
Writableout.write in interface Writableout - DataOuput to serialize this object into.IOException - any other problem for write.public void readFields(DataInput in) throws IOException
Writablein.  
 
 For efficiency, implementations should attempt to re-use storage in the existing object where possible.
readFields in interface Writablein - DataInput to deseriablize this object from.IOException - any other problem for readFields.Copyright © 2023 Apache Software Foundation. All rights reserved.