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com.tangosol.util.processor
Class NumberMultiplier

java.lang.Object
com.tangosol.util.Base
com.tangosol.util.processor.AbstractProcessor
com.tangosol.util.processor.PropertyProcessor
com.tangosol.util.processor.NumberMultiplier

All Implemented Interfaces:

ExternalizableLite, PortableObject, InvocableMap.EntryProcessor, java.io.Serializable

public class NumberMultiplier

extends PropertyProcessor

The NumberMultiplier entry processor is used to multiply a property value of a Number type. Supported types are: Byte, Short, Integer, Long, Float, Double, BigInteger and BigDecimal.

Since:

Coherence 3.1

Author:

gg 2005.10.31

Field Summary

Fields inherited from class com.tangosol.util.processor.PropertyProcessor

m_manipulator

Constructor Summary

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

NumberMultiplier(java.lang.String sName, java.lang.Number numFactor, boolean fPostFactor)
Construct an NumberMultiplier processor that will multiply a property value by a specified factor, returning either the old or the new value as specified.

NumberMultiplier(ValueManipulator manipulator, java.lang.Number numFactor, boolean fPostFactor)
Construct an NumberMultiplier processor that will multiply a property value by a specified factor, returning either the old or the new value as specified.

Method Summary

protected java.lang.String	getDescription() Returns this PropertyProcessor's description.
java.lang.Object	process(InvocableMap.Entry entry) Process a Map.Entry object.
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.
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.

Methods inherited from class com.tangosol.util.processor.PropertyProcessor

equals, get, hashCode, set, toString

Methods inherited from class com.tangosol.util.processor.AbstractProcessor

processAll

Constructor Detail

NumberMultiplier

public NumberMultiplier()

Default constructor (necessary for the ExternalizableLite interface).

NumberMultiplier

public NumberMultiplier(java.lang.String sName,
                        java.lang.Number numFactor,
                        boolean fPostFactor)

Construct an NumberMultiplier processor that will multiply a property value by a specified factor, returning either the old or the new value as specified. The Java type of the original property value will dictate the way the specified factor is interpreted. For example, applying a factor of Double(0.5) to a property value of Integer(4) will result in a new property value of Integer(2).
If the original property value is null, the Java type of the numFactor parameter will dictate the Java type of the new value.

Parameters:

sName - the property name

numFactor - the Number representing the magnitude and sign of the multiplier

fPostFactor - pass true to return the value as it was before it was multiplied, or pass false to return the value as it is after it is multiplied

NumberMultiplier

public NumberMultiplier(ValueManipulator manipulator,
                        java.lang.Number numFactor,
                        boolean fPostFactor)

Construct an NumberMultiplier processor that will multiply a property value by a specified factor, returning either the old or the new value as specified. The Java type of the original property value will dictate the way the specified factor is interpreted. For example, applying a factor of Double(0.5) to a property value of Integer(4) will result in a new property value of Integer(2).
If the original property value is null, the Java type of the numFactor parameter will dictate the Java type of the new value.

Parameters:

manipulator - the ValueManipulator; could be null

numFactor - the Number representing the magnitude and sign of the multiplier

fPostFactor - pass true to return the value as it was before it was multiplied, or pass false to return the value as it is after it is multiplied

Method Detail

process

public java.lang.Object process(InvocableMap.Entry entry)

Process a Map.Entry object.

Parameters:

entry - the Entry to process Note: if this method throws an exception, all modifications to the supplied entry or any other entries retrieved via the BackingMapContext.getBackingMapEntry(java.lang.Object) API will be rolled back leaving all underlying values unchanged.

Returns:

the result of the processing, if any

getDescription

protected java.lang.String getDescription()

Returns this PropertyProcessor's description.

Specified by:

getDescription in class PropertyProcessor

Returns:

this PropertyProcessor's description

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

Overrides:

readExternal in class PropertyProcessor

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

Overrides:

writeExternal in class PropertyProcessor

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

Overrides:

readExternal in class PropertyProcessor

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

Overrides:

writeExternal in class PropertyProcessor

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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