org.eclipse.equinox.internal.p2.metadata.expression

Class CoercingComparator<T>

java.lang.Object

org.eclipse.equinox.internal.p2.metadata.expression.CoercingComparator<T>

Type Parameters:

T - The type for the comparator.

public abstract class CoercingComparator<T>
extends java.lang.Object

A comparator that performs coercion if needed before comparison.

Constructor Summary

Constructors

Constructor and Description
CoercingComparator()

Method Summary

Modifier and Type	Method and Description
static <TA,TB> int	coerceAndCompare(TA o1, TB o2) Finds the comparator for a and b and delegates the coercion/comparison to the comparator according to priority.
static <TA,TB> boolean	coerceAndEquals(TA o1, TB o2) Finds the comparator for a and b and delegates the coercion/equal to the comparator according to priority.
static <V> CoercingComparator<V>	getComparator(V value, java.lang.Object v2) Obtains the coercing comparator for the given value.
protected java.lang.IllegalArgumentException	uncoercable(java.lang.Object v)

Methods inherited from class java.lang.Object

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

Constructor Detail

CoercingComparator

public CoercingComparator()

Method Detail

coerceAndCompare

public static <TA,TB> int coerceAndCompare(TA o1,
                                           TB o2)
                                    throws java.lang.IllegalArgumentException

Finds the comparator for a and b and delegates the coercion/comparison to the comparator according to priority.

Parameters:

o1 - the first object to be compared.

o2 - the second object to be compared.

Returns:

The result of the comparison

Throws:

java.lang.IllegalArgumentException - if no comparator was found or if coercion was impossible

See Also:

Comparator.compare(Object, Object)

coerceAndEquals

public static <TA,TB> boolean coerceAndEquals(TA o1,
                                              TB o2)
                                       throws java.lang.IllegalArgumentException

Finds the comparator for a and b and delegates the coercion/equal to the comparator according to priority.

Parameters:

o1 - the first object to be compared.

o2 - the second object to be compared.

Returns:

The result of the equality test

Throws:

java.lang.IllegalArgumentException - if no comparator was found or if coercion was impossible

See Also:

Object.equals(Object)

getComparator

public static <V> CoercingComparator<V> getComparator(V value,
                                                      java.lang.Object v2)

Obtains the coercing comparator for the given value.

Parameters:

value - The value

Returns:

The coercing comparator

uncoercable

protected java.lang.IllegalArgumentException uncoercable(java.lang.Object v)