de.ipk_gatersleben.bit.bi.edal.primary_data.metadata

Class MetaData

java.lang.Object

de.ipk_gatersleben.bit.bi.edal.primary_data.metadata.MetaData

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable

Direct Known Subclasses:

MetaDataImplementation

public class MetaData
extends java.lang.Object
implements java.lang.Cloneable, java.io.Serializable

Basic meta data comprising at least dublin core administrative meta data. Objects of this class can only be instantiated by calling ImplementationProvider.createMetaDataInstance() m which is implemented by the particular eDAL implementation e.g. Instance MetaData or an extended subclass is not supported

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static UntypedData	DIRECTORY constant for directory meta data values
static java.util.EnumMap<EnumDublinCoreElements,java.util.List<java.lang.Class<? extends UntypedData>>>	ELEMENT_TYPE_MAP
static UntypedData	EMPTY constant for empty meta data values
protected java.util.EnumMap<? super EnumDublinCoreElements,UntypedData>	metaDataValues the store of all supported dublin core meta data
static UntypedData	UNKNOWN constant for unknown meta data values
protected static java.lang.String	UNKNOWN_STRING

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	MetaData() Construct empty MetaDataValues and initialize with default MetaDataTypes

Method Summary

Modifier and Type	Method and Description
MetaData	clone() Clone the MetaData object.
boolean	equals(java.lang.Object object)
<T extends UntypedData> T	getElementValue(java.lang.Enum<? extends EnumDublinCoreElements> element) Getter for a value of an element of the MetaData object.
int	hashCode()
void	setElementValue(EnumDublinCoreElements key, UntypedData value) Modify the value of a meta data element
java.lang.String	toString()

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

UNKNOWN_STRING

protected static final java.lang.String UNKNOWN_STRING

See Also:

Constant Field Values

ELEMENT_TYPE_MAP

public static final java.util.EnumMap<EnumDublinCoreElements,java.util.List<java.lang.Class<? extends UntypedData>>> ELEMENT_TYPE_MAP

EMPTY

public static final UntypedData EMPTY

constant for empty meta data values

UNKNOWN

public static final UntypedData UNKNOWN

constant for unknown meta data values

DIRECTORY

public static final UntypedData DIRECTORY

constant for directory meta data values

metaDataValues

protected java.util.EnumMap<? super EnumDublinCoreElements,UntypedData> metaDataValues

the store of all supported dublin core meta data

Constructor Detail

MetaData

protected MetaData()

Construct empty MetaDataValues and initialize with default MetaDataTypes

Method Detail

clone

public MetaData clone()
               throws java.lang.CloneNotSupportedException

Clone the MetaData object.

Overrides:

clone in class java.lang.Object

Returns:

the cloned MetaData object.

Throws:

java.lang.CloneNotSupportedException - if unable to clone.

equals

public boolean equals(java.lang.Object object)

Overrides:

equals in class java.lang.Object

getElementValue

public <T extends UntypedData> T getElementValue(java.lang.Enum<? extends EnumDublinCoreElements> element)
                                          throws MetaDataException

Getter for a value of an element of the MetaData object.

Type Parameters:

T - the UntypedData type

Parameters:

element - the element as EnumDublinCoreElements enum.

Returns:

the value of a meta data element.

Throws:

MetaDataException - if unable to load a value.

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

setElementValue

public void setElementValue(EnumDublinCoreElements key,
                            UntypedData value)
                     throws MetaDataException

Modify the value of a meta data element

Parameters:

key - the element to set.

value - the new value for the element.

Throws:

MetaDataException - if unable to set meta data element.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object