org.datanucleus.metadata

Class ElementMetaData

java.lang.Object

org.datanucleus.metadata.MetaData

org.datanucleus.metadata.AbstractElementMetaData

org.datanucleus.metadata.ElementMetaData

All Implemented Interfaces:

Serializable, ColumnMetaDataContainer

public class ElementMetaData
extends AbstractElementMetaData

This element specifies the mapping for the element component of arrays and collections. If only one column is mapped, and no additional information is needed for the column, then the column attribute can be used. Otherwise, the column element(s) are used. The serialised attribute specifies that the key values are to be serialised into the named column. The foreign-key attribute specifies the name of a foreign key to be generated.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.datanucleus.metadata.AbstractElementMetaData

columnName, columns, embeddedMetaData, foreignKeyMetaData, indexed, indexMetaData, mappedBy, table, unique, uniqueMetaData

Fields inherited from class org.datanucleus.metadata.MetaData

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

Constructor Summary

Constructors

Constructor and Description
ElementMetaData() Default constructor.
ElementMetaData(ElementMetaData emd) Constructor to create a copy of the passed metadata using the provided parent.

Method Summary

Modifier and Type	Method and Description
void	populate(ClassLoaderResolver clr, ClassLoader primary, MetaDataManager mmgr) Populate the MetaData.
String	toString(String prefix, String indent) Returns a string representation of the object using a prefix This can be used as part of a facility to output a MetaData file.

Methods inherited from class org.datanucleus.metadata.AbstractElementMetaData

addColumn, getColumnMetaData, getColumnName, getDeleteAction, getEmbeddedMetaData, getForeignKeyMetaData, getIndexed, getIndexMetaData, getMappedBy, getTable, getUniqueMetaData, getUpdateAction, initialise, isUnique, newColumnMetaData, newEmbeddedMetaData, newForeignKeyMetaData, newIndexMetaData, newUniqueMetaData, setColumnName, setDeleteAction, setDeleteAction, setEmbeddedMetaData, setForeignKeyMetaData, setIndexed, setIndexMetaData, setMappedBy, setTable, setUnique, setUniqueMetaData, setUpdateAction, setUpdateAction

Methods inherited from class org.datanucleus.metadata.MetaData

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

Methods inherited from class java.lang.Object

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

Constructor Detail

ElementMetaData

public ElementMetaData(ElementMetaData emd)

Constructor to create a copy of the passed metadata using the provided parent.

Parameters:

emd - The metadata to copy

ElementMetaData

public ElementMetaData()

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

Method Detail

populate

public void populate(ClassLoaderResolver clr,
                     ClassLoader primary,
                     MetaDataManager mmgr)

Populate the MetaData.

Overrides:

populate in class AbstractElementMetaData

Parameters:

clr - Class loader to use

primary - the primary ClassLoader to use (or null)

mmgr - MetaData manager

toString

public String toString(String prefix,
                       String indent)

Returns a string representation of the object using a prefix 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.