org.eclipse.persistence.jpa.jpql.model.query
Class AbstractSelectStatementStateObject

java.lang.Object
  org.eclipse.persistence.jpa.jpql.model.query.AbstractStateObject
      org.eclipse.persistence.jpa.jpql.model.query.AbstractSelectStatementStateObject

All Implemented Interfaces:

StateObject

Direct Known Subclasses:

SelectStatementStateObject, SimpleSelectStatementStateObject

public abstract class AbstractSelectStatementStateObject
extends AbstractStateObject

This state object represents the select statement, which has at least a SELECT clause and a FROM clause.

Version:

2.4

See Also:

SelectStatementStateObject, FromClauseStateObject, GroupByClauseStateObject, HavingClauseStateObject, SelectClauseStateObject, WhereClauseStateObject, AbstractSelectStatement

Author:

Pascal Filion

Since:

2.4

Field Summary

static java.lang.String	GROUP_BY_CLAUSE_PROPERTY Notify the state object representing the GROUP BY clause has changed.
static java.lang.String	HAVING_CLAUSE_PROPERTY Notify the state object representing the HAVING clause has changed.
static java.lang.String	WHERE_CLAUSE_PROPERTY Notify the state object representing the WHERE clause has changed.

Constructor Summary

protected

AbstractSelectStatementStateObject(StateObject parent) Creates a new AbstractSelectStatementStateObject.

Method Summary

protected void	addChildren(java.util.List<StateObject> children) Adds the children of this StateObject to the given list.
CollectionMemberDeclarationStateObject	addCollectionDeclaration() Adds a new collection declaration to the FROM clause.
CollectionMemberDeclarationStateObject	addCollectionDeclaration(java.lang.String collectionValuedPath, java.lang.String identificationVariable) Adds a new collection declaration to the FROM clause.
GroupByClauseStateObject	addGroupByClause() Adds the GROUP BY clause.
GroupByClauseStateObject	addGroupByClause(java.lang.String jpqlFragment) Adds the GROUP BY clause and parses the given JPQL fragment.
HavingClauseStateObject	addHavingClause() Adds the HAVING clause.
HavingClauseStateObject	addHavingClause(java.lang.String jpqlFragment) Adds the HAVING clause and parses the given JPQL fragment.
IdentificationVariableDeclarationStateObject	addRangeDeclaration() Adds a new range variable declaration to the FROM clause.
IdentificationVariableDeclarationStateObject	addRangeDeclaration(IEntity entity, java.lang.String identificationVariable) Adds to this select statement a new range variable declaration.
IdentificationVariableDeclarationStateObject	addRangeDeclaration(java.lang.String entityName, java.lang.String identificationVariable) Adds to this select statement a new range variable declaration.
WhereClauseStateObject	addWhereClause() Adds the WHERE clause.
WhereClauseStateObject	addWhereClause(java.lang.String jpqlFragment) Adds the WHERE clause and parses the given JPQL fragment.
protected abstract AbstractFromClauseStateObject	buildFromClause() Creates the state object representing the FROM clause.
protected abstract AbstractSelectClauseStateObject	buildSelectClause() Creates the state object representing the SELECT clause.
IterableListIterator<? extends VariableDeclarationStateObject>	declarations() Returns the list of VariableDeclarationStateObject defining the variable declarations, which are mapping an entity to a variable or a collection-valued member to a variable.
IdentificationVariableStateObject	findIdentificationVariable(java.lang.String identificationVariable) Returns the IdentificationVariableStateObject representing the given identification variable.
DeclarationStateObject	getDeclaration() Returns the declaration clause which defines the domain of the query by declaring identification variables.
AbstractSelectStatement	getExpression() Returns the actual parsed object if this StateObject representation of the JPQL query was created by parsing an existing JPQL query.
AbstractFromClauseStateObject	getFromClause() Returns the state object representing the FROM clause.
GroupByClauseStateObject	getGroupByClause() Returns the state object representing the GROUP BY clause.
HavingClauseStateObject	getHavingClause() Returns the state object representing the HAVING clause.
AbstractSelectClauseStateObject	getSelectClause() Returns the state object representing the SELECT clause.
WhereClauseStateObject	getWhereClause() Returns the state object representing the WHERE clause.
boolean	hasGroupByClause() Returns the state object representing the GROUP BY clause.
boolean	hasHavingClause() Returns the state object representing the HAVING clause.
boolean	hasWhereClause() Returns the state object representing the WHERE clause.
java.util.Iterator<IdentificationVariableStateObject>	identificationVariables() Returns the IdentificationVariableStateObjects holding onto the identification variables, which are the variables defined in the FROM clause.
protected void	initialize() Initializes this state object.
boolean	isEquivalent(StateObject stateObject) Determines whether the given StateObject is equivalent to this one, i.e. the information of both StateObject is the same.
void	parseSelect(java.lang.String jpqlFragment) Parses the given JPQL fragment and create the select item.
void	removeGroupByClause() Removes the GROUP BY clause.
void	removeHavingClause() Removes the HAVING clause.
void	removeWhereClause() Removes the WHERE clause.
void	toggleGroupByClause() Either adds or removes the state object representing the GROUP BY clause.
void	toggleHavingClause() Either adds or removes the state object representing the HAVING clause.
void	toggleWhereClause() Either adds or removes the state object representing the WHERE clause.
protected void	toTextInternal(java.lang.Appendable writer) Prints out a string representation of this StateObject, which should not be used to define a true string representation of a JPQL query but should be used for debugging purposes.

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

acceptUnknownVisitor, acceptUnknownVisitor, addProblems, addPropertyChangeListener, areEquivalent, buildProblem, buildProblem, buildStateObject, buildStateObjects, checkParent, children, decorate, equals, firePropertyChanged, getChangeSupport, getDecorator, getGrammar, getManagedTypeProvider, getParent, getQueryBuilder, getRoot, getType, getType, getTypeHelper, getTypeRepository, hashCode, isDecorated, parent, parent, parent, removePropertyChangeListener, setExpression, setParent, toString, toString, toStringInternal, toStringItems, toText

Methods inherited from class java.lang.Object

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

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

accept

Field Detail

GROUP_BY_CLAUSE_PROPERTY

public static java.lang.String GROUP_BY_CLAUSE_PROPERTY

Notify the state object representing the GROUP BY clause has changed.

HAVING_CLAUSE_PROPERTY

public static java.lang.String HAVING_CLAUSE_PROPERTY

Notify the state object representing the HAVING clause has changed.

WHERE_CLAUSE_PROPERTY

public static java.lang.String WHERE_CLAUSE_PROPERTY

Notify the state object representing the WHERE clause has changed.

Constructor Detail

AbstractSelectStatementStateObject

protected AbstractSelectStatementStateObject(StateObject parent)

Creates a new AbstractSelectStatementStateObject.

Parameters:

parent - The parent of this state object, which cannot be null

Throws:

java.lang.NullPointerException - The given parent cannot be null

Method Detail

addChildren

protected void addChildren(java.util.List<StateObject> children)

Adds the children of this StateObject to the given list.

Overrides:

addChildren in class AbstractStateObject

Parameters:

children - The list used to store the children

addCollectionDeclaration

public CollectionMemberDeclarationStateObject addCollectionDeclaration()

Adds a new collection declaration to the FROM clause.

Returns:

The CollectionMemberDeclarationStateObject representing the collection declaration

addCollectionDeclaration

public CollectionMemberDeclarationStateObject addCollectionDeclaration(java.lang.String collectionValuedPath,
                                                                       java.lang.String identificationVariable)

Adds a new collection declaration to the FROM clause.

Parameters:

collectionValuedPath - The collection-valued path expression

identificationVariable - The variable defining the collection-valued path expression

Returns:

The CollectionMemberDeclarationStateObject representing the collection declaration

addGroupByClause

public GroupByClauseStateObject addGroupByClause()

Adds the GROUP BY clause. The clause is not added if it's already present.

Returns:

The GroupByClauseStateObject

addGroupByClause

public GroupByClauseStateObject addGroupByClause(java.lang.String jpqlFragment)

Adds the GROUP BY clause and parses the given JPQL fragment. The clause is not added if it's already present.

Parameters:

jpqlFragment - The fragment of the JPQL to parse that represents the group by items, the fragment cannot start with GROUP BY

Returns:

The GroupByClauseStateObject

addHavingClause

public HavingClauseStateObject addHavingClause()

Adds the HAVING clause. The clause is not added if it's already present.

Returns:

The GroupByClauseStateObject

addHavingClause

public HavingClauseStateObject addHavingClause(java.lang.String jpqlFragment)

Adds the HAVING clause and parses the given JPQL fragment. The clause is not added if it's already present.

Parameters:

jpqlFragment - The fragment of the JPQL to parse that represents the conditional expression, the fragment cannot start with HAVING

Returns:

The HavingClauseStateObject

addRangeDeclaration

public IdentificationVariableDeclarationStateObject addRangeDeclaration()

Adds a new range variable declaration to the FROM clause.

Returns:

The StateObject representing the new range variable declaration

addRangeDeclaration

public IdentificationVariableDeclarationStateObject addRangeDeclaration(IEntity entity,
                                                                        java.lang.String identificationVariable)

Adds to this select statement a new range variable declaration.

Parameters:

entity - The external form of the entity to add to the declaration list

identificationVariable - The unique identifier identifying the given IEntity

Returns:

The StateObject representing the new range variable declaration

addRangeDeclaration

public IdentificationVariableDeclarationStateObject addRangeDeclaration(java.lang.String entityName,
                                                                        java.lang.String identificationVariable)

Adds to this select statement a new range variable declaration.

Parameters:

entityName - The name of the entity

identificationVariable - The unique identifier identifying the entity

Returns:

The StateObject representing the range variable declaration

addWhereClause

public WhereClauseStateObject addWhereClause()

Adds the WHERE clause. The clause is not added if it's already present.

Returns:

The GroupByClauseStateObject

addWhereClause

public WhereClauseStateObject addWhereClause(java.lang.String jpqlFragment)

Adds the WHERE clause and parses the given JPQL fragment. The clause is not added if it's already present.

Parameters:

jpqlFragment - The fragment of the JPQL to parse that represents the conditional expression, the fragment cannot start with WHERE

Returns:

The WhereClauseStateObject

buildFromClause

protected abstract AbstractFromClauseStateObject buildFromClause()

Creates the state object representing the FROM clause.

Returns:

A concrete instance of AbstractFromClauseStateObject

buildSelectClause

protected abstract AbstractSelectClauseStateObject buildSelectClause()

Creates the state object representing the SELECT clause.

Returns:

A concrete instance of AbstractSelectClauseStateObject

declarations

public IterableListIterator<? extends VariableDeclarationStateObject> declarations()

Returns the list of VariableDeclarationStateObject defining the variable declarations, which are mapping an entity to a variable or a collection-valued member to a variable.

Example:

• Employee e
• IN (e.employees) AS emps

Returns:

The list of VariableDeclarationStateObject

findIdentificationVariable

public IdentificationVariableStateObject findIdentificationVariable(java.lang.String identificationVariable)

Returns the IdentificationVariableStateObject representing the given identification variable.

Specified by:

findIdentificationVariable in interface StateObject

Overrides:

findIdentificationVariable in class AbstractStateObject

Returns:

The IdentificationVariableStateObject defining the given identification variable

getDeclaration

public DeclarationStateObject getDeclaration()

Returns the declaration clause which defines the domain of the query by declaring identification variables.

Specified by:

getDeclaration in interface StateObject

Overrides:

getDeclaration in class AbstractStateObject

Returns:

The declaration clause of which this StateObject is a child; i.e. either the top-level declaration if this is part of the top query or the sub-level declaration if this is part of a subquery

getExpression

public AbstractSelectStatement 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)

getFromClause

public AbstractFromClauseStateObject getFromClause()

Returns the state object representing the FROM clause.

Returns:

The state object representing the FROM clause, which is never null

getGroupByClause

public GroupByClauseStateObject getGroupByClause()

Returns the state object representing the GROUP BY clause.

Returns:

Either the actual state object representing the GROUP BY clause or null if it's not present

getHavingClause

public HavingClauseStateObject getHavingClause()

Returns the state object representing the HAVING clause.

Returns:

Either the actual state object representing the HAVING clause or null if it's not present

getSelectClause

public AbstractSelectClauseStateObject getSelectClause()

Returns the state object representing the SELECT clause.

Returns:

Either the actual state object representing the SELECT clause, which is never null

getWhereClause

public WhereClauseStateObject getWhereClause()

Returns the state object representing the WHERE clause.

Returns:

Either the actual state object representing the WHERE clause or the null state object since null is never returned

hasGroupByClause

public boolean hasGroupByClause()

Returns the state object representing the GROUP BY clause.

Returns:

Either the actual state object representing the GROUP BY clause or null if it's not present

hasHavingClause

public boolean hasHavingClause()

Returns the state object representing the HAVING clause.

Returns:

Either the actual state object representing the HAVING clause or null if it's not present

hasWhereClause

public boolean hasWhereClause()

Returns the state object representing the WHERE clause.

Returns:

Either the actual state object representing the WHERE clause or null if it's not present

identificationVariables

public java.util.Iterator<IdentificationVariableStateObject> identificationVariables()

Returns the IdentificationVariableStateObjects holding onto the identification variables, which are the variables defined in the FROM clause.

Example:

• Employee e; e is returned
• IN (e.employees) AS emps
; emps is returned
• Manager m JOIN m.employees emps; m and emps are returned

Returns:

The list of IdentificationVariableStateObjects

initialize

protected void initialize()

Initializes this state object.

Overrides:

initialize in class AbstractStateObject

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

parseSelect

public void parseSelect(java.lang.String jpqlFragment)

Parses the given JPQL fragment and create the select item. For the top-level query, the fragment can contain several select items but for a subquery, it can represent only one.

Parameters:

jpqlFragment - The portion of the query representing one or several select items

removeGroupByClause

public void removeGroupByClause()

Removes the GROUP BY clause.

removeHavingClause

public void removeHavingClause()

Removes the HAVING clause.

removeWhereClause

public void removeWhereClause()

Removes the WHERE clause.

toggleGroupByClause

public void toggleGroupByClause()

Either adds or removes the state object representing the GROUP BY clause.

toggleHavingClause

public void toggleHavingClause()

Either adds or removes the state object representing the HAVING clause.

toggleWhereClause

public void toggleWhereClause()

Either adds or removes the state object representing the WHERE clause.

toTextInternal

protected void toTextInternal(java.lang.Appendable writer)
                       throws java.io.IOException

Prints out a string representation of this StateObject, which should not be used to define a true string representation of a JPQL query but should be used for debugging purposes.

Specified by:

toTextInternal in class AbstractStateObject

Parameters:

writer - The writer used to print out the string representation

Throws:

java.io.IOException - This should never happens, it is only required because Appendable is used instead of any concrete class