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com.tangosol.util.comparator
Class ExtractorComparator

java.lang.Object
com.tangosol.util.comparator.ExtractorComparator

All Implemented Interfaces:

PortableObject, java.io.Serializable, java.util.Comparator

public class ExtractorComparator

extends java.lang.Object

implements java.util.Comparator, java.io.Serializable, PortableObject

Comparator implementation that uses specified ValueExtractor to extract value(s) to be used for comparison.

Author:

as 2010.09.09

Constructor Summary

ExtractorComparator()
Default constructor (for PortableObject).

ExtractorComparator(ValueExtractor extractor)
Construct a ExtractorComparator with the specified extractor.

Method Summary

int	compare(java.lang.Object o1, java.lang.Object o2) Compares extracted values (by specified ValueExtractor) of given arguments for order.
void	readExternal(PofReader in) Restore the contents of a user type instance by reading its state using the specified PofReader 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 interface java.util.Comparator

equals

Constructor Detail

ExtractorComparator

public ExtractorComparator()

Default constructor (for PortableObject).

ExtractorComparator

public ExtractorComparator(ValueExtractor extractor)

Construct a ExtractorComparator with the specified extractor.

Parameters:

extractor - the ValueExtractor to use by this filter

Method Detail

compare

public int compare(java.lang.Object o1,
                   java.lang.Object o2)

Compares extracted values (by specified ValueExtractor) of given arguments for order.

Specified by:

compare in interface java.util.Comparator

Parameters:

o1 - the first object to be compared

o2 - the second object to be compared

Returns:

a negative integer, zero, or a positive integer as the first argument is less than, equal to, or greater than the second

Throws:

java.lang.ClassCastException - if the arguments' types prevent them from being compared by this Comparator.

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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