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

Class CompoundExpressionStateObject

java.lang.Object

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

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

All Implemented Interfaces:

StateObject

Direct Known Subclasses:

ArithmeticExpressionStateObject, ComparisonExpressionStateObject, LogicalExpressionStateObject

public abstract class CompoundExpressionStateObject
extends AbstractStateObject

A compound StateObject has a left and right expressions combined by an identifier.

BNF: expression ::= left_expression <identifier> right_expression

Since:

2.4

Version:

2.4

Author:

Pascal Filion

See Also:

CompoundExpression

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	LEFT_STATE_OBJECT_PROPERTY Notifies the left state object property has changed.
static java.lang.String	RIGHT_STATE_OBJECT_PROPERTY Notifies the right state object property has changed.

Method Summary

Modifier and Type	Method and Description
CompoundExpression	getExpression() Returns the actual parsed object if this StateObject representation of the JPQL query was created by parsing an existing JPQL query.
abstract java.lang.String	getIdentifier() Returns the identifier joining the two StateObjects.
StateObject	getLeft() Returns the StateObject that represents the left expression.
StateObject	getRight() Returns the StateObject that represents the right expression.
boolean	hasLeft() Determines whether there is a StateObject that represents the left expression.
boolean	hasRight() Determines whether there is a StateObject that represents the right expression.
boolean	isEquivalent(StateObject stateObject) Determines whether the given StateObject is equivalent to this one, i.e.
void	parseLeft(java.lang.String jpqlFragment) Parses the given JPQL fragment and update the left side of the compound expression.
void	parseRight(java.lang.String jpqlFragment) Parses the given JPQL fragment and update the right side of the compound expression.
void	setLeft(StateObject leftStateObject) Sets the left StateObject to become the given object.
void	setRight(StateObject rightStateObject) Sets the right StateObject to become the given object.

Methods inherited from class org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractStateObject

addPropertyChangeListener, children, decorate, equals, findIdentificationVariable, getDeclaration, getDecorator, getGrammar, getManagedTypeProvider, getParent, getQueryBuilder, getRoot, getType, getType, getTypeHelper, getTypeRepository, hashCode, isDecorated, removePropertyChangeListener, setExpression, setParent, toString, toString, toText

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

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

accept

Field Detail

LEFT_STATE_OBJECT_PROPERTY

public static final java.lang.String LEFT_STATE_OBJECT_PROPERTY

Notifies the left state object property has changed.

See Also:

Constant Field Values

RIGHT_STATE_OBJECT_PROPERTY

public static final java.lang.String RIGHT_STATE_OBJECT_PROPERTY

Notifies the right state object property has changed.

See Also:

Constant Field Values

Method Detail

getExpression

public CompoundExpression getExpression()

Returns the actual parsed object if this StateObject representation of the JPQL query was created by parsing an existing JPQL query.

Specified by:

getExpression in interface StateObject

Overrides:

getExpression in class AbstractStateObject

Returns:

The parsed object when a JPQL query is parsed and converted into a StateObject or null when the JPQL query is manually created (i.e. not from a string)

getIdentifier

public abstract java.lang.String getIdentifier()

Returns the identifier joining the two StateObjects.

Returns:

The JPQL identifier join two expressions

getLeft

public StateObject getLeft()

Returns the StateObject that represents the left expression.

Returns:

The StateObject representing the left expression

getRight

public StateObject getRight()

Returns the StateObject that represents the right expression.

Returns:

The StateObject representing the right expression

hasLeft

public boolean hasLeft()

Determines whether there is a StateObject that represents the left expression.

Returns:

true if there is a left StateObject; false if it is null

hasRight

public boolean hasRight()

Determines whether there is a StateObject that represents the right expression.

Returns:

true if there is a right StateObject; false if it is null

isEquivalent

public boolean isEquivalent(StateObject stateObject)

Determines whether the given StateObject is equivalent to this one, i.e. the information of both StateObject is the same.

Specified by:

isEquivalent in interface StateObject

Overrides:

isEquivalent in class AbstractStateObject

Parameters:

stateObject - The StateObject to compare its content to this one

Returns:

true if both object are equivalent; false otherwise

parseLeft

public void parseLeft(java.lang.String jpqlFragment)

Parses the given JPQL fragment and update the left side of the compound expression.

Parameters:

jpqlFragment - The portion of the query to become the left side of the compound expression

parseRight

public void parseRight(java.lang.String jpqlFragment)

Parses the given JPQL fragment and update the right side of the compound expression.

Parameters:

jpqlFragment - The portion of the query to become the right side of the compound expression

setLeft

public void setLeft(StateObject leftStateObject)

Sets the left StateObject to become the given object.

Parameters:

leftStateObject - The StateObject representing the left expression

setRight

public void setRight(StateObject rightStateObject)

Sets the right StateObject to become the given object.

Parameters:

rightStateObject - The StateObject representing the right expression