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java.lang.Objectorg.apache.mahout.cf.taste.impl.common.jdbc.AbstractJDBCComponent
org.apache.mahout.cf.taste.impl.model.jdbc.AbstractJDBCDataModel
org.apache.mahout.cf.taste.impl.model.jdbc.AbstractBooleanPrefJDBCDataModel
org.apache.mahout.cf.taste.impl.model.jdbc.SQL92BooleanPrefJDBCDataModel
org.apache.mahout.cf.taste.impl.model.jdbc.PostgreSQLBooleanPrefJDBCDataModel
public class PostgreSQLBooleanPrefJDBCDataModel
See also PostgreSQLJDBCDataModel
--
same except deals with a table without preference info:
CREATE TABLE taste_preferences ( user_id BIGINT NOT NULL, item_id BIGINT NOT NULL, PRIMARY KEY (user_id, item_id) ); CREATE INDEX taste_preferences_user_id_index ON taste_preferences (user_id); CREATE INDEX taste_preferences_item_id_index ON taste_preferences (item_id);
PostgreSQLJDBCDataModel
,
Serialized FormField Summary |
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Fields inherited from class org.apache.mahout.cf.taste.impl.model.jdbc.AbstractJDBCDataModel |
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DEFAULT_ITEM_ID_COLUMN, DEFAULT_PREFERENCE_COLUMN, DEFAULT_PREFERENCE_TABLE, DEFAULT_PREFERENCE_TIME_COLUMN, DEFAULT_USER_ID_COLUMN |
Fields inherited from class org.apache.mahout.cf.taste.impl.common.jdbc.AbstractJDBCComponent |
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DEFAULT_DATASOURCE_NAME |
Constructor Summary | |
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PostgreSQLBooleanPrefJDBCDataModel()
Creates a using the default DataSource (named
AbstractJDBCComponent.DEFAULT_DATASOURCE_NAME and default table/column names. |
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PostgreSQLBooleanPrefJDBCDataModel(DataSource dataSource)
Creates a using the given DataSource and default
table/column names. |
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PostgreSQLBooleanPrefJDBCDataModel(DataSource dataSource,
String preferenceTable,
String userIDColumn,
String itemIDColumn,
String timestampColumn)
Creates a using the given DataSource and default
table/column names. |
|
PostgreSQLBooleanPrefJDBCDataModel(String dataSourceName)
Creates a using the default DataSource found
under the given name, and using default table/column names. |
Method Summary | |
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void |
setPreference(long userID,
long itemID,
float value)
Override since PostgreSQL doesn't have the same non-standard capability that MySQL has, to optionally ignore an insert that fails since the row exists already. |
Methods inherited from class org.apache.mahout.cf.taste.impl.model.jdbc.SQL92BooleanPrefJDBCDataModel |
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getVerifyPreferenceSQL |
Methods inherited from class org.apache.mahout.cf.taste.impl.model.jdbc.AbstractBooleanPrefJDBCDataModel |
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buildPreference, getMaxPreference, getMinPreference, hasPreferenceValues |
Methods inherited from class org.apache.mahout.cf.taste.impl.model.jdbc.AbstractJDBCDataModel |
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doGetPreferencesForItem, exportWithIDsOnly, exportWithPrefs, getDataSource, getItemIDColumn, getItemIDs, getItemIDsFromUser, getLongColumn, getNumItems, getNumUsers, getNumUsersWithPreferenceFor, getNumUsersWithPreferenceFor, getPreferenceColumn, getPreferencesForItem, getPreferencesFromUser, getPreferenceTable, getPreferenceTime, getPreferenceValue, getUserIDColumn, getUserIDs, refresh, removePreference, setLongParameter |
Methods inherited from class org.apache.mahout.cf.taste.impl.common.jdbc.AbstractJDBCComponent |
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checkNotNullAndLog, checkNotNullAndLog, getFetchSize, lookupDataSource |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public PostgreSQLBooleanPrefJDBCDataModel() throws TasteException
Creates a using the default DataSource
(named
AbstractJDBCComponent.DEFAULT_DATASOURCE_NAME
and default table/column names.
TasteException
- if DataSource
can't be foundpublic PostgreSQLBooleanPrefJDBCDataModel(String dataSourceName) throws TasteException
Creates a using the default DataSource
found
under the given name, and using default table/column names.
dataSourceName
- name of DataSource
to look up
TasteException
- if DataSource
can't be foundpublic PostgreSQLBooleanPrefJDBCDataModel(DataSource dataSource)
Creates a using the given DataSource
and default
table/column names.
dataSource
- DataSource
to usepublic PostgreSQLBooleanPrefJDBCDataModel(DataSource dataSource, String preferenceTable, String userIDColumn, String itemIDColumn, String timestampColumn)
Creates a using the given DataSource
and default
table/column names.
dataSource
- DataSource
to usepreferenceTable
- name of table containing preference datauserIDColumn
- user ID column nameitemIDColumn
- item ID column nametimestampColumn
- timestamp column name (may be null)Method Detail |
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public void setPreference(long userID, long itemID, float value) throws TasteException
setPreference
in interface DataModel
setPreference
in class SQL92BooleanPrefJDBCDataModel
TasteException
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