mondrian.rolap.aggmatcher
Class DefaultRecognizer

java.lang.Object
  mondrian.rolap.aggmatcher.Recognizer
      mondrian.rolap.aggmatcher.DefaultRecognizer

 class DefaultRecognizer
extends Recognizer

This is the default Recognizer. It uses the rules found in the file DefaultRules.xml to find aggregate tables and there columns.

Author:

Richard M. Emberson

Nested Class Summary

Nested classes/interfaces inherited from class mondrian.rolap.aggmatcher.Recognizer

Recognizer.Matcher

Field Summary

Fields inherited from class mondrian.rolap.aggmatcher.Recognizer

aggTable, dbFactTable, msgRecorder, returnValue, star

Constructor Summary

DefaultRecognizer(DefaultRules aggDefault, RolapStar star, JdbcSchema.Table dbFactTable, JdbcSchema.Table aggTable, MessageRecorder msgRecorder)

Method Summary

protected int	checkMeasures() Create measures for an aggregate table.
protected Recognizer.Matcher	getFactCountMatcher() Get the Matcher to be used to match the column which is the fact count column.
protected Recognizer.Matcher	getIgnoreMatcher() Get the Matcher to be used to match columns to be ignored.
protected Recognizer.Matcher	getMeasureMatcher(JdbcSchema.Table.Column.Usage factUsage) Get the Match used to identify columns that are measures.
(package private) DefaultRules	getRules() Get the DefaultRules instance associated with this object.
protected int	matchForeignKey(JdbcSchema.Table.Column.Usage factUsage) This creates a foreign key usage.
protected void	matchLevels(Hierarchy hierarchy, HierarchyUsage hierarchyUsage) Create level usages.

Methods inherited from class mondrian.rolap.aggmatcher.Recognizer

check, checkFactCount, checkForeignKeys, checkIgnores, checkLevels, checkNosMeasures, checkUnusedColumns, convertAggregator, convertAggregator, findCubes, generateImpliedMeasures, getColumnName, inNotSeenForeignKeys, lookupInChildren, makeFactCount, makeForeignKey, makeIgnore, makeLevel, makeMeasure, makeMeasure

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultRecognizer

DefaultRecognizer(DefaultRules aggDefault,
                  RolapStar star,
                  JdbcSchema.Table dbFactTable,
                  JdbcSchema.Table aggTable,
                  MessageRecorder msgRecorder)

Method Detail

getRules

DefaultRules getRules()

Get the DefaultRules instance associated with this object.

getIgnoreMatcher

protected Recognizer.Matcher getIgnoreMatcher()

Get the Matcher to be used to match columns to be ignored.

Specified by:

getIgnoreMatcher in class Recognizer

getFactCountMatcher

protected Recognizer.Matcher getFactCountMatcher()

Get the Matcher to be used to match the column which is the fact count column.

Specified by:

getFactCountMatcher in class Recognizer

getMeasureMatcher

protected Recognizer.Matcher getMeasureMatcher(JdbcSchema.Table.Column.Usage factUsage)

Get the Match used to identify columns that are measures.

checkMeasures

protected int checkMeasures()

Create measures for an aggregate table.

First, iterator through all fact table measure usages. Create a Matcher for each such usage. Iterate through all aggregate table columns. For each column that matches create a measure usage.

Per fact table measure usage, at most only one aggregate measure should be created.

Specified by:

checkMeasures in class Recognizer

Returns:

number of measures created.

matchForeignKey

protected int matchForeignKey(JdbcSchema.Table.Column.Usage factUsage)

This creates a foreign key usage.

Using the foreign key Matcher with the fact usage's column name the aggregate table's columns are searched for one that matches. For each that matches a foreign key usage is created (thought if more than one is created its is an error which is handled in the calling code.

Specified by:

matchForeignKey in class Recognizer

matchLevels

protected void matchLevels(Hierarchy hierarchy,
                           HierarchyUsage hierarchyUsage)

Create level usages.

A Matcher is created using the Hierarchy's name, the RolapLevel name, and the column name associated with the RolapLevel's key expression. The aggregate table columns are search for the first match and, if found, a level usage is created for that column.

Specified by:

matchLevels in class Recognizer