org.tm4j.topicmap.utils .XTMUtils

Utility class containing methods to reduce the number of objects in a TM4J topic map.

The static methods contained in this class implement one or more of the XTM duplicate suppression rules. This class also contains an implementation of the XTM topic merging rules.

The implementations in this class are safe to use with any TM4J backend.

Warning Many of the duplicate suppression algorithms are brute-force algorithms and may take some time to execute against large topic maps.

java.lang.Object

XTMUtils

Field Summary
m_log

Method Summary
void	flattenTopicRefs(org.tm4j.topicmap.TopicMap tm) Performs a single pass through the topic map, replacing all topic references with a reference to the base topic of the merged topic set.
org.tm4j.topicmap.TopicMap	makeConsistent(org.tm4j.topicmap.TopicMap tm) Creates a "consistent" topic map representation by applying the duplicate suppression rules of XTM 1.0 Annex F (section 6) This means that 1) All topics which are merged together are replaced by a single topic having the characteristics of all the merged ones (XTM 1.0 F.5.1) 2) Duplicate subject indicators on the same topic are collapsed into a single subject indicator (XTM 1.0 F.6.1) 3) Duplicate names in the same scope on the same topic are collapsed into a single name (XTM 1.0 F.6.2) 4) Duplicate role players in associations are removed (XTM 1.0 F.6.4) 5) Duplicate associations are collapsed into a single association (XTM 1.0 F.6.3) Note that F.6.4 is applied before F.6.3 as the XTM definition of a duplicate association uses a definition of equivalence which is affected by the aplication as F.6.4.
void	removeDuplicateAssociations(java.util.Collection assocs,org.tm4j.topicmap.TopicMapUtils utils)
void	removeDuplicateAssociations(org.tm4j.topicmap.TopicMap tm)
void	removeDuplicateNames(org.tm4j.topicmap.Topic t)
void	removeDuplicateOccurrences(org.tm4j.topicmap.Topic t)
void	removeDuplicateSubjectIndicators(org.tm4j.topicmap.Topic t)
org.tm4j.topicmap.Topic	staticMerge(org.tm4j.topicmap.Topic t) Takes all topics merged with `t` and adds their characteristics to `t`.
org.tm4j.topicmap.Topic	staticMerge(org.tm4j.topicmap.Topic t,boolean swapTopics) Internal implementation of the static merge algorithm.
void	swapTopic(org.tm4j.topicmap.Topic from,org.tm4j.topicmap.Topic to) Exchanges all uses of the topic `from to use the topic to.`