org.entityfs.util.dirdiff
Class EntitySizeAndModificationTimeMatchStrategy

java.lang.Object
  org.entityfs.util.dirdiff.EntitySizeAndModificationTimeMatchStrategy

All Implemented Interfaces:

EntityMatchStrategy

Direct Known Subclasses:

EntitySizeAndFileModificationTimeMatchStrategy, FileSizeAndModificationTimeMatchStrategy

public class EntitySizeAndModificationTimeMatchStrategy
extends Object
implements EntityMatchStrategy

This EntityMatchStrategy matches entities with the same names and types. The modification time of the target entity must be equal to or later than the modification time of the master entity. If the entities are files, their sizes must be equal.

Files with dissimilar contents that happen to have the same size are matched by this filter.

Since objects of this class contains no mutable internal state, the singleton instance INSTANCE may be used instead of instantiating this class.

Since:

1.0

Author:

Karl Gustafsson

In_jar:

entityfs-util

Field Summary

static EntitySizeAndModificationTimeMatchStrategy

INSTANCE

Constructor Summary

EntitySizeAndModificationTimeMatchStrategy()

Method Summary

String

getMatchingEntityName(EntityView ev, Map<String,? extends EntityView> m) Check if there is a matching entity in the supplied entity map.

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final EntitySizeAndModificationTimeMatchStrategy INSTANCE

Constructor Detail

EntitySizeAndModificationTimeMatchStrategy

public EntitySizeAndModificationTimeMatchStrategy()

Method Detail

getMatchingEntityName

public String getMatchingEntityName(EntityView ev,
                                    Map<String,? extends EntityView> m)

Description copied from interface: EntityMatchStrategy

Check if there is a matching entity in the supplied entity map. If there is one, return its name.

When this method is called, the master directory (ev's parent) is locked for reading, and the target directory (the parent of all entities in the map) is locked for writing.

Specified by:

getMatchingEntityName in interface EntityMatchStrategy

Parameters:

ev - The entity to search for a matching entity to.

m - A map containing all remaining entities in the target directory, keyed under their names. Remaining entities are all of the entities in the target directory that has not been matched by a previous invocation of this method.

Returns:

The name of the matching entity, or null if no entity in the target directory matched ev. The returned name, if non-null, must be the same as one of the keys in the map.