Package com.mayam.wf.config.shared

Class HasIdentity.Utilities

java.lang.Object

com.mayam.wf.config.shared.HasIdentity.Utilities

Enclosing interface:

HasIdentity

public static class HasIdentity.Utilities
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static final Comparator<HasIdentity>	COMPARATOR	Comparator for use with objects implementing the HasIdentity interface.

Constructor Summary

Constructors

Constructor	Description
Utilities()

Method Summary

Modifier and Type	Method	Description
static final String	createUniqueId(String sourceId)	Makes a unique identifier based on an existing identifier.
static <T extends HasIdentity> List<String>	identityList(Collection<T> entries)	Extracts a list of identities from a collection of HasIdentity objects.
static <T extends HasIdentity> Set<String>	identitySet(Collection<T> entries)	Extracts a set of identities from a collection of HasIdentity objects.
static <T extends HasIdentity> T	lookup(String id, Collection<T> entries)	Looks up an object implementing HasIdentity by its identitfier within a collection.
static <T extends HasIdentity> List<T>	objectList(Collection<String> needles, Collection<T> haystack)	Compiles a list that is a subset, selected using the provided identifiers, of a collection of HasIdentity objects.

Methods inherited from class java.lang.Object

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

Field Details

COMPARATOR

public static final Comparator<HasIdentity> COMPARATOR

Comparator for use with objects implementing the HasIdentity interface. Equivalent to String.compareTo(String) on HasIdentity.getId().

Constructor Details

Utilities

public Utilities()

Method Details

createUniqueId

public static final String createUniqueId(String sourceId)

Makes a unique identifier based on an existing identifier. Typically used when creating copies. A naive time based algorithm is used, but it should ensure uniqueness within a specific configuration since there is only ever one writer.

Parameters:

sourceId - identifier used as base.

Returns:

newly created unique identifier.

lookup

public static <T extends HasIdentity> T lookup(String id,
 Collection<T> entries)

Looks up an object implementing HasIdentity by its identitfier within a collection.

identityList

public static <T extends HasIdentity> List<String> identityList(Collection<T> entries)

Extracts a list of identities from a collection of HasIdentity objects.

objectList

public static <T extends HasIdentity> List<T> objectList(Collection<String> needles,
 Collection<T> haystack)

Compiles a list that is a subset, selected using the provided identifiers, of a collection of HasIdentity objects.

identitySet

public static <T extends HasIdentity> Set<String> identitySet(Collection<T> entries)

Extracts a set of identities from a collection of HasIdentity objects.