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/*
* MappingClassElement.java
*
* Created on March 3, 2000, 1:11 PM
*/
package com.sun.jdo.api.persistence.model.mapping;
import java.util.List;
import java.util.ArrayList;
import org.netbeans.modules.dbschema.TableElement;
import org.netbeans.modules.dbschema.SchemaElement;
import com.sun.jdo.api.persistence.model.ModelException;
/**
*
* @author raccah
* @version %I%
*/
public interface MappingClassElement extends MappingElement
{
/** Constant representing mapping file extension. */
public static final String MAPPING_EXTENSION = "mapping"; // NOI18N
/** Constant representing Consistency level.
* NONE_CONSISTENCY implies that no consistency semantics are enforced.
*/
public static final int NONE_CONSISTENCY = 0x0;
/** Constant representing Consistency level.
* CHECK_MODIFIED_AT_COMMIT_CONSISTENCY implies that at commit,
* consistency check is enforced for all fetched fields of modified
* objects.
*/
public static final int CHECK_MODIFIED_AT_COMMIT_CONSISTENCY = 0x1;
/** Constant representing Consistency level.
* CHECK_ALL_AT_COMMIT_CONSISTENCY implies that at commit, consistency
* check is enforced for all the fields of objects at this consistency
* level.
* Please note that this level is not supported in the current release.
*/
public static final int CHECK_ALL_AT_COMMIT_CONSISTENCY = 0x2;
/** Constant representing Consistency level.
* LOCK_WHEN_MODIFIED_CONSISTENCY implies exclusive lock is obtained for
* data corresponding to this object when an attempt to modify the object
* is made.
* Please note that this level is not supported in the current release.
*/
public static final int LOCK_WHEN_MODIFIED_CONSISTENCY = 0x4;
/** Constant representing Consistency level.
* LOCK_WHEN_MODIFIED_CHECK_ALL_AT_COMMIT_CONSISTENCY implies exclusive
* lock is obtained for data corresponding to this object when an attempt
* to modify the object is made. Also at commit, consistency check is
* enforced for all the fields of objects at this consistency level.
* Please note that this level is not supported in the current release.
*/
public static final int LOCK_WHEN_MODIFIED_CHECK_ALL_AT_COMMIT_CONSISTENCY =
CHECK_ALL_AT_COMMIT_CONSISTENCY | LOCK_WHEN_MODIFIED_CONSISTENCY;
/** Constant representing Consistency level.
* LOCK_WHEN_LOADED_CONSISTENCY implies that exclusive lock is
* obtained for data corresponding to this object before accessing it.
*/
public static final int LOCK_WHEN_LOADED_CONSISTENCY = 0x8;
/** Constant representing Consistency level.
* VERSION_CONSISTENCY implies that no lock is obtained for data
* corresponding to this object until it will be updated.
*/
public static final int VERSION_CONSISTENCY = 0x10;
// TBD
// clears out fields -- equiv to new, can take it out
// public void clear ();
// public boolean mapFieldToTable (MappingFieldElement field,
// TableElement table);
/** Returns the version number of this MappingClassElement object.
* Please note, the returned version number reflects the version number at
* the last save, NOT the version number of the memory representation.
* @return version number
*/
public int getVersionNumber ();
/** Returns true if the version number of this MappingClassElement object
* is older than the current version number of the archiving scheme.
* @see #getVersionNumber
* @return true if it is in need of updating, false otherwise
*/
public boolean hasOldVersionNumber ();
/** This method is called after a MappingClassElement is unarchived
* from a .mapping file. This method provides a hook to do any checking
* (version number checking) and conversion after unarchiving.
* @exception ModelException if impossible
*/
public void postUnarchive () throws ModelException;
/** This method is called prior to storing a MappingClassElement in a
* .mapping file. This method provides a hook to do any conversion
* before archiving.
* @exception ModelException if impossible
*/
public void preArchive () throws ModelException;
/** Gets the modified flag for this mapping class.
* @return <code>true</code> if there have been (property) changes to this
* class, <code>false</code> otherwise.
*/
public boolean isModified ();
/** Set the modified flag for this mapping class to flag. This is usually
* set to <code>true</code> by property changes and <code>false</code>
* after a save.
* @param flag if <code>true</code>, this class is marked as modified;
* if <code>false</code>, it is marked as unmodified.
*/
public void setModified (boolean flag);
/** Gets the consistency level of this mapping class.
* @return the consistency level, one of {@link #NONE_CONSISTENCY},
* {@link #CHECK_MODIFIED_AT_COMMIT_CONSISTENCY},
* {@link #CHECK_ALL_AT_COMMIT_CONSISTENCY},
* {@link #LOCK_WHEN_MODIFIED_CONSISTENCY},
* {@link #LOCK_WHEN_MODIFIED_CHECK_ALL_AT_COMMIT_CONSISTENCY},
* {@link #LOCK_WHEN_LOADED_CONSISTENCY}, or
* {@link #VERSION_CONSISTENCY}.
*/
public int getConsistencyLevel ();
/** Set the consistency level of this mapping class.
* @param level an integer indicating the consistency level, one of:
* {@link #NONE_CONSISTENCY},{@link #CHECK_MODIFIED_AT_COMMIT_CONSISTENCY},
* {@link #CHECK_ALL_AT_COMMIT_CONSISTENCY},
* {@link #LOCK_WHEN_MODIFIED_CONSISTENCY},
* {@link #LOCK_WHEN_MODIFIED_CHECK_ALL_AT_COMMIT_CONSISTENCY},
* {@link #LOCK_WHEN_LOADED_CONSISTENCY}, or
* {@link #VERSION_CONSISTENCY}.
* @exception ModelException if impossible.
*/
public void setConsistencyLevel (int level) throws ModelException;
//======================= schema handling ===========================
/** Returns the name of the SchemaElement which represents the
* database used by the tables mapped to this mapping class element.
* @return the name of the database root for this mapping class
*/
public String getDatabaseRoot ();
/** Set the database root for this MappingClassElement.
* The root represents the database used by the tables mapped to
* this mapping class.
* @param root the new database root
* @exception ModelException if impossible
*/
public void setDatabaseRoot (SchemaElement root) throws ModelException;
//======================= table handling ===========================
/** Returns the list of tables (MappingTableElements) used by this mapping
* class.
* @return the meta data tables for this mapping class
*/
public ArrayList getTables ();
/** Scans through this mapping class looking for a table whose
* name matches the name passed in.
* @param name name of the table to find.
* @return the meta data table whose name matches the name parameter
*/
public MappingTableElement getTable (String name);
/** Convenience method which accepts a table element and attempts to add
* it as either a primary or secondary table depending on the existing list
* of tables and the foreign keys for the table.
* @param table table element to be added as either a primary or secondary
* table.
* @exception ModelException if impossible
*/
public void addTable (TableElement table) throws ModelException;
/** Set the primary table for this mapping class to the supplied table.
* @param table table element to be used as the primary table.
* @exception ModelException if impossible
*/
public void setPrimaryTable (TableElement table) throws ModelException;
/** Adds a reference to the supplied table as a secondary table for this
* mapping class. It creates a MappingReferenceKeyElement for the supplied
* primary/secondary table pair.
* @param parent mapping table element which should also be the primary
* table.
* @param table table element to be used as a secondary table.
* @exception ModelException if impossible
*/
public MappingReferenceKeyElement addSecondaryTable (MappingTableElement
parentTable, TableElement table) throws ModelException;
/** Removes the reference to the supplied table as a mapped table for this
* mapping class. This works whether the table is the primary table or a
* secondary table.
* @param table mapping table element to be removed from this mapping class.
* @exception ModelException if impossible
*/
public void removeTable (MappingTableElement table) throws ModelException;
//======================= field handling ===========================
/** Returns the list of fields (MappingFieldElements) in this mapping
* class. This list includes both local and relationship fields.
* @return the mapping fields in this mapping class
*/
public ArrayList getFields ();
/** Scans through this mapping class looking for a field whose
* name matches the name passed in.
* @param name name of the field to find.
* @return the mapping field whose name matches the name parameter
*/
public MappingFieldElement getField (String name);
/** Adds a field to the list of fields in this mapping class.
* @param field field element to be added
* @exception ModelException if impossible
*/
public void addField (MappingFieldElement field) throws ModelException;
/** Removes a field from the list of fields in this mapping class.
* @param field field element to be removed
* @exception ModelException if impossible
*/
public void removeField (MappingFieldElement field) throws ModelException;
/** Returns the list of version fields (MappingFieldElements) in this
* mapping class. This list only includes fields if the consistency
* level is {@link #VERSION_CONSISTENCY}.
* @return the version fields in this mapping class
*/
public List getVersionFields ();
/** Gets the navigable flag for this mapping class.
* @return <code>true</code> if lazy initialization will be used,
* <code>false</code> if access to a non-fetched field will result in an
* exception. The default is <code>true</code>.
*/
public boolean isNavigable ();
/** Set the navigable flag for this mapping class to flag.
* @param flag if <code>true</code>, lazy initialization will be used;
* if <code>false</code>, access to a non-fetched field will result in an
* exception.
* @exception ModelException if impossible
*/
public void setNavigable (boolean flag) throws ModelException;
}
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