org.datanucleus.metadata

Class IndexMetaData

java.lang.Object

org.datanucleus.metadata.MetaData

org.datanucleus.metadata.AbstractConstraintMetaData

org.datanucleus.metadata.IndexMetaData

All Implemented Interfaces:

Serializable, ColumnMetaDataContainer

public class IndexMetaData
extends AbstractConstraintMetaData
implements ColumnMetaDataContainer

For schema generation, it might be useful to specify that a column or columns be indexed, and to provide the name of the index. For this purpose, an index element can be contained within a field, element, key, value, or join element, and this indicates that the column(s) associated with the referenced element should be indexed. Indexes can also be specified at the class level, by including index elements containing column elements. In this case, the column elements are mapped elsewhere, and the column elements contain only the column name.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.datanucleus.metadata.AbstractConstraintMetaData

columns, memberNames, name, table

Fields inherited from class org.datanucleus.metadata.MetaData

extensions, LOCALISER, METADATA_CREATED_STATE, METADATA_INITIALISED_STATE, METADATA_POPULATED_STATE, METADATA_USED_STATE, metaDataState, parent, VENDOR_NAME, VENDOR_NAME_OLD

Constructor Summary

Constructors

Constructor and Description
IndexMetaData() Default constructor.
IndexMetaData(IndexMetaData imd) Constructor to create a copy of the passed metadata.

Method Summary

Modifier and Type	Method and Description
String	getName()
String	getTable()
boolean	isUnique()
void	setName(String name)
void	setTable(String table)
IndexMetaData	setUnique(boolean unique)
String	toString(String prefix, String indent) Returns a string representation of the object.

Methods inherited from class org.datanucleus.metadata.AbstractConstraintMetaData

addColumn, addMember, getColumnMetaData, getMemberNames, getNumberOfColumns, getNumberOfMembers, newColumnMetaData

Methods inherited from class org.datanucleus.metadata.MetaData

addExtension, addExtension, assertIfInitialised, getExtensions, getNoOfExtensions, getParent, getValueForExtension, getValuesForExtension, hasExtension, initialise, isInitialised, isPopulated, isUsed, newExtensionMetaData, removeExtension, setParent, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.datanucleus.metadata.ColumnMetaDataContainer

addColumn, getColumnMetaData

Constructor Detail

IndexMetaData

public IndexMetaData(IndexMetaData imd)

Constructor to create a copy of the passed metadata.

Parameters:

imd - The metadata to copy

IndexMetaData

public IndexMetaData()

Default constructor. Set fields using setters, before populate().

Method Detail

getName

public String getName()

setName

public void setName(String name)

getTable

public String getTable()

setTable

public void setTable(String table)

isUnique

public final boolean isUnique()

setUnique

public IndexMetaData setUnique(boolean unique)

toString

public String toString(String prefix,
                       String indent)

Returns a string representation of the object. This can be used as part of a facility to output a MetaData file.

Overrides:

toString in class MetaData

Parameters:

prefix - prefix string

indent - indent string

Returns:

a string representation of the object.