velosurf.context
Class Instance

java.lang.Object
  |
  +--java.util.AbstractMap
        |
        +--java.util.HashMap
              |
              +--velosurf.context.Instance

All Implemented Interfaces:

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

public class Instance

extends java.util.HashMap

implements DataAccessor

An Instance provides field values by their name, choosing in a transparent way between the associated RowIterator or the Map its implement.

Author:

Claude Brisson

See Also:

Serialized Form

Inner classes inherited from class java.util.Map

java.util.Map.Entry

Field Summary

protected DBConnection	mDB the main database connection
protected Entity	mEntity this Instance's Entity
protected RowIterator	mRowIterator the associated RowIterator

Fields inherited from class java.util.HashMap

count, emptyHashIterator, ENTRIES, entrySet, KEYS, keySet, loadFactor, modCount, serialVersionUID, table, threshold, values, VALUES

Constructor Summary

Instance(Entity inEntity)
Build an empty instance for the given entity

Method Summary

boolean	delete() Delete the row associated with this Instance.
java.lang.Object	get(java.lang.Object inKey) Generic getter, used to access this instance properties by their name.
java.lang.String	getEntity() Get the name of this Instance's Entity.
java.lang.Object	getInternal(java.lang.Object inKey) Internal getter : access only Map interface
java.util.List	getKeys() Deprecated. As of Velosurf version 0.9, replaced by getPrimaryKey Returns an ArrayList of two-entries maps ('name' & 'value'), meant to be use in a #foreach loop to build form fields, like : #foreach ($field in $product.keys) <input type=hidden name='$field.name' value='$field.value'> #end
java.util.List	getPrimaryKey() Returns an ArrayList of two-entries maps ('name' & 'value'), meant to be use in a #foreach loop to build form fields, like :
protected java.lang.String	getTable() Get the name of the table mapped by this Instance's Entity.
void	initialize() Meant to be overloaded
boolean	insert() Insert a new row corresponding to this Instance.
void	setRowIterator(RowIterator inRowIterator) Set the RowIterator this Instance is bound to, when used in a #foreach directive.
boolean	update() Update the row associated with this Instance from passed values
boolean	update(java.util.Map inValues) Update the row associated with this Instance from actual values

Methods inherited from class java.util.HashMap

, capacity, clear, clone, containsKey, containsValue, entrySet, getHashIterator, isEmpty, keySet, loadFactor, put, putAll, readObject, rehash, remove, size, values, writeObject

Methods inherited from class java.util.AbstractMap

equals, hashCode, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

equals, hashCode

Field Detail

mRowIterator

protected RowIterator mRowIterator

the associated RowIterator

mEntity

protected Entity mEntity

this Instance's Entity

mDB

protected DBConnection mDB

the main database connection

Constructor Detail

Instance

public Instance(Entity inEntity)

Build an empty instance for the given entity

Parameters:

inEntity - Entity this instance is a realisation of

Method Detail

initialize

public void initialize()

Meant to be overloaded

setRowIterator

public void setRowIterator(RowIterator inRowIterator)

Set the RowIterator this Instance is bound to, when used in a #foreach directive. Called by the framework.

Parameters:

inRowIterator - the RowIterator this Instance is bound to.

getEntity

public java.lang.String getEntity()

Get the name of this Instance's Entity.

Returns:

The name of this Instance's Entity.

getTable

protected java.lang.String getTable()

Get the name of the table mapped by this Instance's Entity.

Returns:

The name of the table mapped by this Instance's Entity.

getKeys

public java.util.List getKeys()

Deprecated. As of Velosurf version 0.9, replaced by getPrimaryKey Returns an ArrayList of two-entries maps ('name' & 'value'), meant to be use in a #foreach loop to build form fields, like :

#foreach ($field in $product.keys)

<input type=hidden name='$field.name' value='$field.value'> #end

Returns:

an ArrayList of two-entries maps ('name' & 'value')

getPrimaryKey

public java.util.List getPrimaryKey()

Returns an ArrayList of two-entries maps ('name' & 'value'), meant to be use in a #foreach loop to build form fields, like :

#foreach ($field in $product.primaryKey)

<input type=hidden name='$field.name' value='$field.value'> #end

Returns:

an ArrayList of two-entries maps ('name' & 'value')

get

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

Generic getter, used to access this instance properties by their name.

Asked property is first searched in the Map, then as a column of the bound RowIterator (if present), and at least among Attributes defined for the entity.

Specified by:

get in interface DataAccessor

Overrides:

get in class java.util.HashMap

Parameters:

inKey - key of the property to be returned

Returns:

a String, an Instance, an AttributeReference or null if an error occurs

getInternal

public java.lang.Object getInternal(java.lang.Object inKey)

Internal getter : access only Map interface

Parameters:

inKey - key of the property to be returned

Returns:

a String, an Instance, an AttributeReference or null if an error occurs

update

public boolean update()

Update the row associated with this Instance from passed values

Velosurf will ensure all key columns are specified, to avoid an accidental massive update.

Returns:

true if successfull, false if an error occurs (in which case $db.lastError can be checked).

update

public boolean update(java.util.Map inValues)

Update the row associated with this Instance from actual values

Velosurf will ensure all key columns are specified, to avoid an accidental massive update.

Parameters:

inValues - values to be used for the update

Returns:

true if successfull, false if an error occurs (in which case $db.lastError can be checked).

delete

public boolean delete()

Delete the row associated with this Instance.

Velosurf will ensure all key columns are specified, to avoid an accidental massive update.

Returns:

true if successfull, false if an error occurs (in which case $db.lastError can be checked).

insert

public boolean insert()

Insert a new row corresponding to this Instance.

Returns:

true if successfull, false if an error occurs (in which case $db.lastError can be checked).