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com.tangosol.util.extractor
Class CompositeUpdater

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

All Implemented Interfaces:

ExternalizableLite, PortableObject, ValueManipulator, ValueUpdater, java.io.Serializable

public class CompositeUpdater

extends Base

implements ValueUpdater, ValueManipulator, ExternalizableLite, PortableObject

A ValueUpdater implementation based on an extractor-updater pair that could also be used as a ValueManipulator.

Author:

gg 2005.10.31

See Also:

ChainedExtractor

Field Summary

protected ValueExtractor	m_extractor The ValueExtractor part.
protected ValueUpdater	m_updater The ValueUpdater part.

Constructor Summary

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

CompositeUpdater(java.lang.String sName)
Construct a CompositeUpdater for a specified method name sequence.

CompositeUpdater(ValueExtractor extractor, ValueUpdater updater)
Construct a CompositeUpdater based on the specified extractor and updater.

Method Summary

ValueExtractor	getExtractor() Retreive the ValueExtractor part.
ValueUpdater	getUpdater() Retreive the ValueUpdator part.
void	readExternal(java.io.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.
java.lang.String	toString() Return a human-readable description for this CompositeUpdater.
void	update(java.lang.Object oTarget, java.lang.Object oValue) Update the state of the passed target object using the passed value.
void	writeExternal(java.io.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_extractor

protected ValueExtractor m_extractor

The ValueExtractor part.

m_updater

protected ValueUpdater m_updater

The ValueUpdater part.

Constructor Detail

CompositeUpdater

public CompositeUpdater()

Default constructor (necessary for the ExternalizableLite interface).

CompositeUpdater

public CompositeUpdater(ValueExtractor extractor,
                        ValueUpdater updater)

Construct a CompositeUpdater based on the specified extractor and updater.

Note: the extractor and updater here are not symmetrical in nature: the extractor is used to "drill-down" to the target object, while the updater will operate on that extracted object.

Parameters:

extractor - the ValueExtractor

updater - the ValueUpdater

CompositeUpdater

public CompositeUpdater(java.lang.String sName)

Construct a CompositeUpdater for a specified method name sequence.

For example: "getAddress.setZip" method name will indicate that the "getAddress()" method should be used to extract an Address object, which will then be used by the "setZip(String)" call.

Parameters:

sName - a dot-delimited sequence of N method names which results in a CompositeUpdater that is based on an chain of (N-1) ReflectionExtractor objects and a single ReflectionUpdater.

Method Detail

update

public void update(java.lang.Object oTarget,
                   java.lang.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

getExtractor

public ValueExtractor getExtractor()

Retreive the ValueExtractor part.

Specified by:

getExtractor in interface ValueManipulator

Returns:

the ValueExtractor

getUpdater

public ValueUpdater getUpdater()

Retreive the ValueUpdator part.

Specified by:

getUpdater in interface ValueManipulator

Returns:

the ValueUpdater

toString

public java.lang.String toString()

Return a human-readable description for this CompositeUpdater.

Returns:

a String description of the CompositeUpdater

readExternal

public void readExternal(java.io.DataInput in)
                  throws java.io.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:

java.io.IOException - if an I/O exception occurs

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

writeExternal

public void writeExternal(java.io.DataOutput out)
                   throws java.io.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:

java.io.IOException - if an I/O exception occurs

readExternal

public void readExternal(PofReader in)
                  throws java.io.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:

java.io.IOException - if an I/O error occurs

writeExternal

public void writeExternal(PofWriter out)
                   throws java.io.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:

java.io.IOException - if an I/O error occurs

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