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/*
* MappingFieldElement.java
*
* Created on March 3, 2000, 1:11 PM
*/
package com.sun.jdo.api.persistence.model.mapping;
import java.util.ArrayList;
import org.netbeans.modules.dbschema.DBMemberElement;
import com.sun.jdo.api.persistence.model.ModelException;
/**
*
* @author raccah
* @version %I%
*/
public interface MappingFieldElement extends MappingMemberElement
{
/** Constant representing the jdo default fetch group.
* This is what used to be mandatory for SynerJ.
*/
public static final int GROUP_DEFAULT = 1;
/** Constant representing no fetch group. */
public static final int GROUP_NONE = 0;
/** Constant representing an independent fetch group. All independent
* fetch groups must have a value less than or equal to this constant.
*/
public static final int GROUP_INDEPENDENT = -1;
// TBD:unmap all components, if remove from class remove here too
//public void clear ();
/** Determines whether this field element is read only or not.
* @return true if the field is read only,
* false otherwise
*/
public boolean isReadOnly ();
/** Set whether this field element is read only or not.
* @param flag - if true, the field element is marked as
* read only; otherwise, it is not
* @exception ModelException if impossible
*/
public void setReadOnly (boolean flag) throws ModelException;
/** Determines whether this field element is in a concurrency check or not.
* @return true if the field is in a concurrency check,
* false otherwise
*/
public boolean isInConcurrencyCheck ();
/** Set whether this field element is in a concurrency check or not.
* @param flag - if true, the field element is marked as
* being in a concurrency check; otherwise, it is not
* @exception ModelException if impossible
*/
public void setInConcurrencyCheck (boolean flag) throws ModelException;
/** Determines whether this field element is a version field or not.
* @return true if the field is a version field,
* false otherwise
*/
public boolean isVersion ();
/** Set whether this field element is a version field or not.
* @param flag - if true, the field element is marked
* as a version field; otherwise, it is not
* @exception ModelException if impossible
*/
public void setVersion (boolean flag) throws ModelException;
//====================== fetch group handling ==========================
/** Get the fetch group of this field element.
* @return the fetch group, one of {@link #GROUP_DEFAULT},
* {@link #GROUP_NONE}, or anything less than or equal to
* {@link #GROUP_INDEPENDENT}
*/
public int getFetchGroup ();
/** Set the fetch group of this field element.
* @param group - an integer indicating the fetch group, one of:
* {@link #GROUP_DEFAULT}, {@link #GROUP_NONE}, or anything less than or
* equal to {@link #GROUP_INDEPENDENT}
* @exception ModelException if impossible
*/
public void setFetchGroup (int group) throws ModelException;
//======================= column handling ===========================
/** Returns the list of column names to which this mapping field is
* mapped.
* @return the names of the columns mapped by this mapping field
*/
public ArrayList getColumns ();
/** Adds a column to the list of columns mapped by this mapping field.
* @param column column element to be added to the mapping
* @exception ModelException if impossible
*/
public void addColumn (DBMemberElement column) throws ModelException;
/** Removes a column from the list of columns mapped by this mapping field.
* @param columnName the relative name of the column to be removed from
* the mapping
* @exception ModelException if impossible
*/
public void removeColumn (String columnName) throws ModelException;
}