Package org.eclipse.persistence.jpa.jpql.tools.model.query

Interface ListHolderStateObject<T>

All Superinterfaces:

StateObject

All Known Implementing Classes:

AbstractFromClauseStateObject, AbstractIdentificationVariableDeclarationStateObject, AbstractListHolderStateObject, AbstractPathExpressionStateObject, CaseExpressionStateObject, CoalesceExpressionStateObject, CollectionValuedPathExpressionStateObject, ConcatExpressionStateObject, ConstructorExpressionStateObject, DerivedPathIdentificationVariableDeclarationStateObject, FromClauseStateObject, FunctionExpressionStateObject, GroupByClauseStateObject, IdentificationVariableDeclarationStateObject, InExpressionStateObject, OrderByClauseStateObject, SelectClauseStateObject, SimpleFromClauseStateObject, StateFieldPathExpressionStateObject, UpdateClauseStateObject

public interface ListHolderStateObject<T>
extends StateObject

A ListHolderStateObject is a StateObject having a list of children and this gives access to some operation over the list.

Version:

2.5

Author:

Pascal Filion

Since:

2.4

Method Summary

Modifier and Type	Method	Description
<S extends T> S	addItem(S item)	Adds the given StateObject as a child of this one.
void	addItems(java.util.List<? extends T> items)	Adds the given list of StateObjects as children of this one.
void	addListChangeListener(java.lang.String listName, IListChangeListener<T> listener)	Registers the given IListChangeListener for the specified list.
boolean	canMoveDown(T item)	Determines whether the given StateObject can be moved down by one position in the list owned by its parent.
boolean	canMoveUp(T item)	Determines whether the given StateObject can be moved up by one position in the list owned by its parent.
T	getItem(int index)	Returns the StateObject at the given positions from the list
boolean	hasItems()	Determines whether this StateObject has any children.
ListIterable<? extends T>	items()	Returns an ListIterable over the children.
int	itemsSize()	Returns the number of children this list holder has.
T	moveDown(T item)	Moves the given StateObject down by one position in the list owned by its parent.
T	moveUp(T item)	Moves the given StateObject up by one position in the list owned by its parent.
void	removeItem(T item)	Removes the given StateObject from the list of children.
void	removeItems(java.util.Collection<T> items)	Removes the given StateObject from the list of children.
void	removeListChangeListener(java.lang.String listName, IListChangeListener<T> listener)	Unregisters the given IListChangeListener that was registered for the specified list.

Methods inherited from interface org.eclipse.persistence.jpa.jpql.tools.model.query.StateObject

accept, addPropertyChangeListener, children, decorate, findIdentificationVariable, getDeclaration, getDecorator, getExpression, getGrammar, getManagedTypeProvider, getParent, getQueryBuilder, getRoot, isDecorated, isEquivalent, removePropertyChangeListener, setParent, toString, toText

Method Detail

addItem

<S extends T> S addItem(S item)

Adds the given StateObject as a child of this one.

Parameters:

item - The child StateObject to become a child of this one return The given item

addItems

void addItems(java.util.List<? extends T> items)

Adds the given list of StateObjects as children of this one.

Parameters:

items - The StateObjects to become children of this one

addListChangeListener

void addListChangeListener(java.lang.String listName,
                           IListChangeListener<T> listener)

Registers the given IListChangeListener for the specified list. The listener will be notified only when items are added, removed, moved from the list.

Parameters:

listName - The name of the list for which the listener will be notified when the content of the list has changed

listener - The listener to be notified upon changes

Throws:

java.lang.NullPointerException - IListChangeListener cannot be null

java.lang.IllegalArgumentException - The listener is already registered with the list name

canMoveDown

boolean canMoveDown(T item)

Determines whether the given StateObject can be moved down by one position in the list owned by its parent.

Parameters:

item - The StateObject that could potentially be moved down

Returns:

true if the object can be moved down by one unit; false otherwise

canMoveUp

boolean canMoveUp(T item)

Determines whether the given StateObject can be moved up by one position in the list owned by its parent.

Parameters:

item - The StateObject that could potentially be moved up

Returns:

true if the object can be moved up by one unit; false otherwise

getItem

T getItem(int index)

Returns the StateObject at the given positions from the list

Parameters:

index - The position of the StateObject to retrieve

Returns:

The StateObject at the given position

hasItems

boolean hasItems()

Determines whether this StateObject has any children.

Returns:

true if this StateObject has children; false otherwise

items

ListIterable<? extends T> items()

Returns an ListIterable over the children.

Returns:

An ListIterable that is iterating over the children

itemsSize

int itemsSize()

Returns the number of children this list holder has.

Returns:

The count of StateObjects that are children of this one

moveDown

T moveDown(T item)

Moves the given StateObject down by one position in the list owned by its parent.

Parameters:

item - The StateObject to move down in the list

Returns:

The given item

moveUp

T moveUp(T item)

Moves the given StateObject up by one position in the list owned by its parent.

Parameters:

item - The StateObject to move up in the list

Returns:

The given item

removeItem

void removeItem(T item)

Removes the given StateObject from the list of children.

Parameters:

item - The child StateObject to not longer be a child

removeItems

void removeItems(java.util.Collection<T> items)

Removes the given StateObject from the list of children.

Parameters:

items - The StateObjects to remove from this one

removeListChangeListener

void removeListChangeListener(java.lang.String listName,
                              IListChangeListener<T> listener)

Unregisters the given IListChangeListener that was registered for the specified list. The listener will no longer be notified only when items are added, removed, moved from the list.

Parameters:

listName - The name of the list for which the listener was registered

listener - The listener to unregister

Throws:

java.lang.NullPointerException - IListChangeListener cannot be null

java.lang.IllegalArgumentException - The listener was never registered with the list name