MetadataColumn (EclipseLink JPA 4.0.0 API)

java.lang.Object
- org.eclipse.persistence.internal.jpa.metadata.ORMetadata
- - org.eclipse.persistence.internal.jpa.metadata.columns.MetadataColumn

Direct Known Subclasses:

DirectColumnMetadata, DiscriminatorColumnMetadata, RelationalColumnMetadata
```
public abstract class MetadataColumn
extends ORMetadata
```
INTERNAL: Object to process JPA column type into EclipseLink database fields. Key notes: - any metadata mapped from XML to this class must be compared in the equals method. - when loading from annotations, the constructor accepts the metadata accessor this metadata was loaded from. Used it to look up any 'companion' annotation needed for processing. - methods should be preserved in alphabetical order.

Since:

EclipseLink 1.2

Author:

Guy Pelletier

Field Summary
- Fields inherited from class org.eclipse.persistence.internal.jpa.metadata.ORMetadata
  m_project

Constructor Summary

Constructors
Modifier	Constructor	Description
`protected`	`MetadataColumn(String xmlElement)`	INTERNAL: Used for XML loading.
`protected`	`MetadataColumn(MetadataAccessor accessor)`	INTERNAL: Used for defaulting.
`protected`	`MetadataColumn(MetadataAnnotation column, MetadataAccessor accessor)`	INTERNAL: Used for annotation loading.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`equals(Object objectToCompare)`	INTERNAL:
`String`	`getColumnDefinition()`	INTERNAL: Used for OX mapping.
`DatabaseField`	`getDatabaseField()`	INTERNAL: Those objects that need/want to initialize more meta data should override this method.
`String`	`getName()`	INTERNAL: Used for OX mapping.
`int`	`hashCode()`
`void`	`setColumnDefinition(String columnDefinition)`	INTERNAL: Used for OX mapping.
`void`	`setName(String name)`	INTERNAL: Used for OX mapping.

Methods inherited from class org.eclipse.persistence.internal.jpa.metadata.ORMetadata
getAccessibleObject, getAccessibleObjectName, getAnnotation, getBoxedType, getDatabaseTypeEnum, getEntityMappings, getFullyQualifiedClassName, getIdentifier, getJavaClass, getJavaClassName, getLoader, getLocation, getLogger, getMetadataClass, getMetadataClass, getMetadataClass, getMetadataFactory, getName, getPrimitiveClassForName, getProject, getText, getXMLElement, hasIdentifier, hasText, initXMLClassName, initXMLObject, initXMLObject, initXMLObjects, initXMLTextObject, loadedFromAnnotation, loadedFromEclipseLinkXML, loadedFromXML, merge, mergeORObjectLists, mergeORObjects, mergeSimpleObjects, reloadEntity, reloadMappedSuperclass, setAccessibleObject, setEntityMappings, setFieldName, setFieldName, setProject, shouldOverride, valuesMatch, valuesMatch

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - MetadataColumn
```
protected MetadataColumn(MetadataAccessor accessor)
```
    INTERNAL: Used for defaulting.
  - MetadataColumn
```
protected MetadataColumn(MetadataAnnotation column,
                         MetadataAccessor accessor)
```
    INTERNAL: Used for annotation loading.
  - MetadataColumn
```
protected MetadataColumn(String xmlElement)
```
    INTERNAL: Used for XML loading.
- Method Detail
  - equals
```
public boolean equals(Object objectToCompare)
```
    INTERNAL:
    
    Specified by:
    
    equals in class ORMetadata
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class Object
  - getColumnDefinition
```
public String getColumnDefinition()
```
    INTERNAL: Used for OX mapping.
  - getDatabaseField
```
public DatabaseField getDatabaseField()
```
    INTERNAL: Those objects that need/want to initialize more meta data should override this method.
  - getName
```
public String getName()
```
    INTERNAL: Used for OX mapping.
  - setColumnDefinition
```
public void setColumnDefinition(String columnDefinition)
```
    INTERNAL: Used for OX mapping.
  - setName
```
public void setName(String name)
```
    INTERNAL: Used for OX mapping.