com.tangosol.util.extractor
Class ReflectionUpdater

java.lang.Object
  com.tangosol.util.Base
      com.tangosol.util.extractor.ReflectionUpdater

All Implemented Interfaces:

ExternalizableLite, PortableObject, ValueUpdater, Serializable

public class ReflectionUpdater
extends Base
implements ValueUpdater, ExternalizableLite, PortableObject

Reflection-based ValueUpdater implementation.

Author:

gg 2005.10.27

See Also:

CompositeUpdater

Field Summary

protected String

m_sMethod The name of the method to invoke.

Constructor Summary

ReflectionUpdater()
Default constructor (necessary for the ExternalizableLite interface).

ReflectionUpdater(String sMethod)
Construct a ReflectionUpdater for a given method name.

Method Summary

boolean	equals(Object o) Compare the ReflectionUpdater with another object to determine equality.
String	getMethodName() Determine the name of the method that this extractor is configured to invoke.
int	hashCode() Determine a hash value for the ReflectionUpdater object according to the general Object.hashCode() contract.
void	readExternal(DataInput in) Restore the contents of this object by loading the object's state from the passed DataInput object.
void	readExternal(PofReader in) Restore the contents of a user type instance by reading its state using the specified PofReader object.
String	toString() Provide a human-readable description of this ValueUpdater object.
void	update(Object oTarget, Object oValue) Update the state of the passed target object using the passed value.
void	writeExternal(DataOutput out) Save the contents of this object by storing the object's state into the passed DataOutput object.
void	writeExternal(PofWriter out) Save the contents of a POF user type instance by writing its state using the specified PofWriter object.

Field Detail

m_sMethod

protected String m_sMethod

The name of the method to invoke.

Constructor Detail

ReflectionUpdater

public ReflectionUpdater()

Default constructor (necessary for the ExternalizableLite interface).

ReflectionUpdater

public ReflectionUpdater(String sMethod)

Construct a ReflectionUpdater for a given method name. This implementation assumes that the corresponding classes will have one and only one method with a specified name and this method will have exactly one parameter.

Parameters:

sMethod - the name of the method to invoke via reflection

Method Detail

update

public void update(Object oTarget,
                   Object oValue)

Update the state of the passed target object using the passed value. For intrinsic types, the specified value is expected to be a standard wrapper type in the same manner that reflection works; for example, an int value would be passed as a java.lang.Integer.

Specified by:

update in interface ValueUpdater

Parameters:

oTarget - the Object to update the state of

oValue - the new value to update the state with

getMethodName

public String getMethodName()

Determine the name of the method that this extractor is configured to invoke.

Returns:

the name of the method to invoke using reflection

equals

public boolean equals(Object o)

Compare the ReflectionUpdater with another object to determine equality.

Returns:

true iff this ReflectionUpdater and the passed object are equivalent ReflectionUpdaters

hashCode

public int hashCode()

Determine a hash value for the ReflectionUpdater object according to the general Object.hashCode() contract.

Returns:

an integer hash value for this ReflectionUpdater object

toString

public String toString()

Provide a human-readable description of this ValueUpdater object.

Returns:

a human-readable description of this ValueUpdater object

readExternal

public void readExternal(DataInput in)
                  throws IOException

Restore the contents of this object by loading the object's state from the passed DataInput object.

Specified by:

readExternal in interface ExternalizableLite

Parameters:

in - the DataInput stream to read data from in order to restore the state of this object

Throws:

IOException - if an I/O exception occurs

NotActiveException - if the object is not in its initial state, and therefore cannot be deserialized into

writeExternal

public void writeExternal(DataOutput out)
                   throws IOException

Save the contents of this object by storing the object's state into the passed DataOutput object.

Specified by:

writeExternal in interface ExternalizableLite

Parameters:

out - the DataOutput stream to write the state of this object to

Throws:

IOException - if an I/O exception occurs

readExternal

public void readExternal(PofReader in)
                  throws IOException

Restore the contents of a user type instance by reading its state using the specified PofReader object.

Specified by:

readExternal in interface PortableObject

Parameters:

in - the PofReader from which to read the object's state

Throws:

IOException - if an I/O error occurs

writeExternal

public void writeExternal(PofWriter out)
                   throws IOException

Save the contents of a POF user type instance by writing its state using the specified PofWriter object.

Specified by:

writeExternal in interface PortableObject

Parameters:

out - the PofWriter to which to write the object's state

Throws:

IOException - if an I/O error occurs