org.springframework.xd.integration.hadoop.partition

Class MessagePartitionKeyPropertyAccessor

java.lang.Object

org.springframework.xd.integration.hadoop.partition.MessagePartitionKeyPropertyAccessor

All Implemented Interfaces:

org.springframework.expression.PropertyAccessor

public class MessagePartitionKeyPropertyAccessor
extends java.lang.Object
implements org.springframework.expression.PropertyAccessor

A PropertyAccessor reading values from a backing Message used by a partition key. In a way this is similar than MapAccessor for header but also adds 'payload' and 'headers' to be resolved. Having 'payload' or 'headers' keywords in headers is not possible to access via this accessor.

Author:

Janne Valkealahti

Constructor Summary

Constructors

Constructor and Description
MessagePartitionKeyPropertyAccessor()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	canRead(org.springframework.expression.EvaluationContext context, java.lang.Object target, java.lang.String name)
boolean	canWrite(org.springframework.expression.EvaluationContext context, java.lang.Object target, java.lang.String name)
java.lang.Class<?>[]	getSpecificTargetClasses()
org.springframework.expression.TypedValue	read(org.springframework.expression.EvaluationContext context, java.lang.Object target, java.lang.String name)
void	write(org.springframework.expression.EvaluationContext context, java.lang.Object target, java.lang.String name, java.lang.Object newValue)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MessagePartitionKeyPropertyAccessor

public MessagePartitionKeyPropertyAccessor()

Method Detail

getSpecificTargetClasses

public java.lang.Class<?>[] getSpecificTargetClasses()

Specified by:

getSpecificTargetClasses in interface org.springframework.expression.PropertyAccessor

canRead

public boolean canRead(org.springframework.expression.EvaluationContext context,
              java.lang.Object target,
              java.lang.String name)
                throws org.springframework.expression.AccessException

Specified by:

canRead in interface org.springframework.expression.PropertyAccessor

Throws:

org.springframework.expression.AccessException

read

public org.springframework.expression.TypedValue read(org.springframework.expression.EvaluationContext context,
                                             java.lang.Object target,
                                             java.lang.String name)
                                               throws org.springframework.expression.AccessException

Specified by:

read in interface org.springframework.expression.PropertyAccessor

Throws:

org.springframework.expression.AccessException

canWrite

public boolean canWrite(org.springframework.expression.EvaluationContext context,
               java.lang.Object target,
               java.lang.String name)
                 throws org.springframework.expression.AccessException

Specified by:

canWrite in interface org.springframework.expression.PropertyAccessor

Throws:

org.springframework.expression.AccessException

write

public void write(org.springframework.expression.EvaluationContext context,
         java.lang.Object target,
         java.lang.String name,
         java.lang.Object newValue)
           throws org.springframework.expression.AccessException

Specified by:

write in interface org.springframework.expression.PropertyAccessor

Throws:

org.springframework.expression.AccessException