java.lang.Object
- org.eclipse.persistence.jpa.jpql.tools.resolver.Declaration

All Implemented Interfaces:

JPQLQueryDeclaration

Direct Known Subclasses:

AbstractRangeDeclaration, CollectionDeclaration, SubqueryDeclaration, TableDeclaration, UnknownDeclaration
```
public abstract class Declaration
extends Object
implements JPQLQueryDeclaration
```
The abstract definition of JPQLQueryDeclaration.

Since:

2.5

Version:

2.5

Author:

Pascal Filion

Nested Class Summary
- Nested classes/interfaces inherited from interface org.eclipse.persistence.jpa.jpql.JPQLQueryDeclaration
  JPQLQueryDeclaration.Type

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Expression`	`getBaseExpression()`	Returns the range variable declaration if this is a range declaration otherwise the collection-valued path expression when this is a collection member declaration.
`Expression`	`getDeclarationExpression()`	Returns the declaration expression, which is either an `IdentificationVariableDeclaration` or a `CollectionMemberDeclaration` when part of a FROM clause, otherwise it's either the `DeleteClause` or the `UpdateClause`.
`IdentificationVariable`	`getIdentificationVariable()`	Returns the `IdentificationVariable` used to declare the "root" object.
`List<Join>`	`getJoins()`	Returns the `JOIN` expressions defined with this declaration, if supported.
`String`	`getRootPath()`	Returns the "root" object for objects which may not be reachable by navigation, it is either the abstract schema name (entity name), a derived path expression (which is only defined in a subquery) or `null` if this `Declaration` is a collection member declaration.
`String`	`getVariableName()`	Returns the identification variable name that is defining either the abstract schema name or the collection-valued path expression
`boolean`	`hasJoins()`	Determines whether the declaration contains JOIN expressions.
`String`	`toString()`

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.eclipse.persistence.jpa.jpql.JPQLQueryDeclaration
getType

- Method Detail
  - getBaseExpression
```
public Expression getBaseExpression()
```
    Returns the range variable declaration if this is a range declaration otherwise the collection-valued path expression when this is a collection member declaration.
    
    Specified by:
    
    getBaseExpression in interface JPQLQueryDeclaration
    
    Returns:
    
    Either the range variable declaration or the collection-valued path expression
  - getDeclarationExpression
```
public Expression getDeclarationExpression()
```
    Returns the declaration expression, which is either an IdentificationVariableDeclaration or a CollectionMemberDeclaration when part of a FROM clause, otherwise it's either the DeleteClause or the UpdateClause.
    
    Specified by:
    
    getDeclarationExpression in interface JPQLQueryDeclaration
    
    Returns:
    
    The root of the declaration expression
  - getIdentificationVariable
```
public IdentificationVariable getIdentificationVariable()
```
    Returns the IdentificationVariable used to declare the "root" object.
    
    Returns:
    
    The alias for the "root" object
  - getJoins
```
public List<Join> getJoins()
```
    Returns the JOIN expressions defined with this declaration, if supported. The list contains the JOIN expressions in ordered they were declared.
    
    Specified by:
    
    getJoins in interface JPQLQueryDeclaration
    
    Returns:
    
    The JOIN expressions defined with this declaration or an empty list if this declaration does not support it
  - getRootPath
```
public String getRootPath()
```
    Returns the "root" object for objects which may not be reachable by navigation, it is either the abstract schema name (entity name), a derived path expression (which is only defined in a subquery) or null if this Declaration is a collection member declaration.
    
    Returns:
    
    The "root" object for objects which may not be reachable by navigation or null if this Declaration is a collection member declaration
  - getVariableName
```
public String getVariableName()
```
    Returns the identification variable name that is defining either the abstract schema name or the collection-valued path expression
    
    Specified by:
    
    getVariableName in interface JPQLQueryDeclaration
    
    Returns:
    
    The identification variable or an empty string if none was defined
  - hasJoins
```
public boolean hasJoins()
```
    Determines whether the declaration contains JOIN expressions. This can be true only when JPQLQueryDeclaration.Type.isRange() returns true. A collection member declaration does not have JOIN expressions.
    
    Specified by:
    
    hasJoins in interface JPQLQueryDeclaration
    
    Returns:
    
    true if at least one JOIN expression was parsed; otherwise false
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object

Class Declaration

Nested Class Summary

Nested classes/interfaces inherited from interface org.eclipse.persistence.jpa.jpql.JPQLQueryDeclaration

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface org.eclipse.persistence.jpa.jpql.JPQLQueryDeclaration

Method Detail

getBaseExpression

getDeclarationExpression

getIdentificationVariable

getJoins

getRootPath

getVariableName

hasJoins

toString