WritablePdxInstance (VMware GemFire 9.15.15)

All Superinterfaces:

PdxInstance, java.io.Serializable
```
public interface WritablePdxInstance
extends PdxInstance
```
WritablePdxInstance is a PdxInstance that also supports field modification using the setField method. To get a WritablePdxInstance call createWriter.

Since:

GemFire 6.6

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`setField(java.lang.String fieldName, java.lang.Object value)`	Set the existing named field to the given value.

Methods inherited from interface org.apache.geode.pdx.PdxInstance
createWriter, equals, getClassName, getField, getFieldNames, getObject, hasField, hashCode, isDeserializable, isEnum, isIdentityField, toString

- Method Detail
  - setField
```
void setField(java.lang.String fieldName,
              java.lang.Object value)
```
    Set the existing named field to the given value. The setField method has copy-on-write semantics. So for the modifications to be stored in the cache the WritablePdxInstance must be put into a region after setField has been called one or more times.
    
    Parameters:
    
    fieldName - name of the field whose value will be set
    
    value - value that will be assigned to the field
    
    Throws:
    
    PdxFieldDoesNotExistException - if the named field does not exist
    
    PdxFieldTypeMismatchException - if the type of the value is not compatible with the field