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oracle.toplink.sessions
Class DatabaseRecord

java.lang.Object
oracle.toplink.internal.sessions.AbstractRecord
oracle.toplink.sessions.DatabaseRecord

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.util.Map, Record

Direct Known Subclasses:

DatabaseRow

public class DatabaseRecord

extends oracle.toplink.internal.sessions.AbstractRecord

Purpose: Define a representation of a database row as field=>value pairs. This is the database row implementation class, the Record or java.util.Map interfaces should be used to access this class instead of the implemention class.

Responsibilities:

• Implement the common hashtable collection protocol.
• Allow get and put on the field or field name.

See Also:

oracle.toplink.internal.helper.DatabaseField, Record, Map, Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.Map

java.util.Map.Entry<K,V>

Method Summary

void	clear() Clears the contents of the database row, both fields and values.
boolean	contains(java.lang.Object value) Checks if the given Object value is contained in the values held in the database row.
boolean	containsKey(java.lang.Object key) Checks if a key (ie. the field) is contained in the database row.
boolean	containsKey(java.lang.String fieldName) Checks if a given field is contained in the database row.
boolean	containsValue(java.lang.Object value) Checks if the given Object value is contained in the values held in the database row.
java.util.Enumeration	elements() Returns an Enumeration of the values in the database row.
java.util.Set	entrySet() Returns a set of map entries (ie. field-value pairs)in the database row with the DatabaseFields as keys and the value Objects as values.
java.lang.Object	get(java.lang.Object key) Retrieves the value for the given key.
java.lang.Object	get(java.lang.String fieldName) Retrieves the value with the given name of the DatabaseField.
java.lang.Object	getIndicatingNoEntry(java.lang.String fieldName) Retrieves the value with the given field name.
java.lang.Object	getValues(DatabaseField key) Returns the Object associated with the given key (null if the key does not map to an Object.)
java.lang.Object	getValues(java.lang.String key) Returns the Object associated with the given key (null if the key does not map to an Object.)
boolean	isEmpty() Checks if the database row is empty (ie. there are no field-value pairs.)
java.util.Enumeration	keys() Returns an Enumeration of the DatabaseField Objects.
java.util.Set	keySet() Returns a set of the keys, the DatabaseField Objects, for the database row.
java.lang.Object	put(java.lang.Object key, java.lang.Object value) Adds a field-value pair to the row.
java.lang.Object	put(java.lang.String key, java.lang.Object value) Adds a field-value pair to the row.
void	putAll(java.util.Map map) Adds all of the elements in the given map to the database row.
int	size() Returns the number of field-value pairs in the database row.
java.util.Collection	values() Returns a collection of the values held in the database row.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Map

equals, hashCode

Method Detail

clear

public void clear()

Clears the contents of the database row, both fields and values.

Specified by:

clear in interface java.util.Map

Overrides:

clear in class oracle.toplink.internal.sessions.AbstractRecord

contains

public boolean contains(java.lang.Object value)

Checks if the given Object value is contained in the values held in the database row.

Overrides:

contains in class oracle.toplink.internal.sessions.AbstractRecord

Parameters:

value - the Object to be considered

Returns:

boolean - true if the Object value is in the row.

containsKey

public boolean containsKey(java.lang.Object key)

Checks if a key (ie. the field) is contained in the database row. Conforms to a hashtable interface.

Specified by:

containsKey in interface java.util.Map

Overrides:

containsKey in class oracle.toplink.internal.sessions.AbstractRecord

Parameters:

key - an Object, either String or DatabaseField

Returns:

boolean - true if the row with the corresponding key is in the row.

containsKey

public boolean containsKey(java.lang.String fieldName)

Checks if a given field is contained in the database row.

Overrides:

containsKey in class oracle.toplink.internal.sessions.AbstractRecord

Parameters:

key - String, the DatabaseField name

Returns:

boolean - true if the row contains the key with the corresponding fieldName.

containsValue

public boolean containsValue(java.lang.Object value)

Checks if the given Object value is contained in the values held in the database row.

Specified by:

containsValue in interface java.util.Map

Overrides:

containsValue in class oracle.toplink.internal.sessions.AbstractRecord

Parameters:

value - the Object under consideration

Returns:

boolean - true if the row contains the Object as a value

elements

public java.util.Enumeration elements()

Returns an Enumeration of the values in the database row.

Overrides:

elements in class oracle.toplink.internal.sessions.AbstractRecord

Returns:

Enumeration

entrySet

public java.util.Set entrySet()

Returns a set of map entries (ie. field-value pairs)in the database row with the DatabaseFields as keys and the value Objects as values.

Specified by:

entrySet in interface java.util.Map

Overrides:

entrySet in class oracle.toplink.internal.sessions.AbstractRecord

Returns:

Set - the set of all the field-value entries (see java.util.Map.Entry)

See Also:

Map.entrySet()

get

public java.lang.Object get(java.lang.Object key)

Retrieves the value for the given key. A field is constructed with the key to check the hash table. If missing, null is returned.

Specified by:

get in interface java.util.Map

Overrides:

get in class oracle.toplink.internal.sessions.AbstractRecord

Parameters:

key - Object, either String or DatabaseField

Returns:

Object

get

public java.lang.Object get(java.lang.String fieldName)

Retrieves the value with the given name of the DatabaseField. A field is constructed on the name to check the hash table. If missing, null is returned.

Overrides:

get in class oracle.toplink.internal.sessions.AbstractRecord

Parameters:

fieldName - String, the DatabaseField name

Returns:

Object - the value

getIndicatingNoEntry

public java.lang.Object getIndicatingNoEntry(java.lang.String fieldName)

Retrieves the value with the given field name. A field is constructed on the name to check the hash table. If missing, DatabaseRow.noEntry is returned.

Overrides:

getIndicatingNoEntry in class oracle.toplink.internal.sessions.AbstractRecord

Parameters:

fieldName - String, the DatabaseField name

Returns:

Object - the value

getValues

public java.lang.Object getValues(DatabaseField key)

Returns the Object associated with the given key (null if the key does not map to an Object.)

Overrides:

getValues in class oracle.toplink.internal.sessions.AbstractRecord

Parameters:

key - DatabaseField

Returns:

Object - the value associated with the key

getValues

public java.lang.Object getValues(java.lang.String key)

Returns the Object associated with the given key (null if the key does not map to an Object.)

Overrides:

getValues in class oracle.toplink.internal.sessions.AbstractRecord

Parameters:

key - String

Returns:

Object - the value associated with the key

isEmpty

public boolean isEmpty()

Checks if the database row is empty (ie. there are no field-value pairs.)

Specified by:

isEmpty in interface java.util.Map

Overrides:

isEmpty in class oracle.toplink.internal.sessions.AbstractRecord

Returns:

boolean - true if the database row is empty

keys

public java.util.Enumeration keys()

Returns an Enumeration of the DatabaseField Objects.

Overrides:

keys in class oracle.toplink.internal.sessions.AbstractRecord

Returns:

Enumeration

keySet

public java.util.Set keySet()

Returns a set of the keys, the DatabaseField Objects, for the database row.

Specified by:

keySet in interface java.util.Map

Overrides:

keySet in class oracle.toplink.internal.sessions.AbstractRecord

Returns:

Set of the keys

put

public java.lang.Object put(java.lang.Object key,
                            java.lang.Object value)
                     throws ValidationException

Adds a field-value pair to the row.

Specified by:

put in interface java.util.Map

Overrides:

put in class oracle.toplink.internal.sessions.AbstractRecord

Parameters:

key - Object, either String or DatabaseField

value - Object

Returns:

Object - the previous Object with that key, could be null

Throws:

ValidationException - if inappropriate key is used

put

public java.lang.Object put(java.lang.String key,
                            java.lang.Object value)

Adds a field-value pair to the row.

Overrides:

put in class oracle.toplink.internal.sessions.AbstractRecord

Parameters:

key - String

value - Object

Returns:

Object - the previous Object with that key, could be null

putAll

public void putAll(java.util.Map map)

Adds all of the elements in the given map to the database row.

Specified by:

putAll in interface java.util.Map

Overrides:

putAll in class oracle.toplink.internal.sessions.AbstractRecord

Parameters:

map - Map of all the field-value elements to be added

size

public int size()

Returns the number of field-value pairs in the database row.

Specified by:

size in interface java.util.Map

Overrides:

size in class oracle.toplink.internal.sessions.AbstractRecord

Returns:

int

values

public java.util.Collection values()

Returns a collection of the values held in the database row.

Specified by:

values in interface java.util.Map

Overrides:

values in class oracle.toplink.internal.sessions.AbstractRecord

Returns:

Collection of value Objects

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