java.lang.Object
- org.eclipse.persistence.jpa.jpql.parser.AbstractExpression

All Implemented Interfaces:

Expression

Direct Known Subclasses:

AbstractConditionalClause, AbstractEncapsulatedExpression, AbstractFromClause, AbstractOrderByClause, AbstractPathExpression, AbstractSchemaName, AbstractSelectClause, AbstractSelectStatement, ArithmeticFactor, AsOfClause, BadExpression, BetweenExpression, CaseExpression, CollectionExpression, CollectionMemberDeclaration, CollectionMemberExpression, CompoundExpression, ConnectByClause, ConstructorExpression, DateTime, DefaultStringExpression, DeleteClause, DeleteStatement, EmptyCollectionComparisonExpression, EntityTypeLiteral, GroupByClause, HierarchicalQueryClause, IdentificationVariable, IdentificationVariableDeclaration, InExpression, InputParameter, Join, JPQLExpression, KeywordExpression, LikeExpression, NotExpression, NullComparisonExpression, NullExpression, NumericLiteral, OrderByItem, RangeVariableDeclaration, RegexpExpression, ResultVariable, StringLiteral, TableVariableDeclaration, UnionClause, UnknownExpression, UpdateClause, UpdateItem, UpdateStatement, WhenClause
```
public abstract class AbstractExpression
extends Object
implements Expression
```
This is the abstract definition of all the parts used to create the tree hierarchy representing the parsed JPQL query.

Since:

2.3

Version:

2.6

Author:

Pascal Filion

See Also:

ExpressionFactory, JPQLGrammar

Field Summary

Fields
Modifier and Type	Field	Description
`static char`	`COMMA`	The constant for ','.
`static char`	`DOT`	The constant for '.'.
`static char`	`DOUBLE_QUOTE`	The constant for '"'.
`static char`	`LEFT_CURLY_BRACKET`	The constant for '{'.
`static char`	`LEFT_PARENTHESIS`	The constant for '('.
`static char`	`NOT_DEFINED`	The constant for a character that is not defined.
`static char`	`RIGHT_CURLY_BRACKET`	The constant for '}'.
`static char`	`RIGHT_PARENTHESIS`	The constant for ')'.
`static char`	`SINGLE_QUOTE`	The constant for '''.
`static char`	`SPACE`	The constant for ' '.
`static char`	`UNDERSCORE`	The constant for '_'.

Fields inherited from interface org.eclipse.persistence.jpa.jpql.parser.Expression
ABS, ALL, AND, ANY, AS, AS_OF, ASC, AVG, BETWEEN, BIT_LENGTH, BOTH, CASE, CAST, CHAR_LENGTH, CHARACTER_LENGTH, CLASS, COALESCE, COLUMN, CONCAT, CONNECT_BY, COUNT, CURRENT_DATE, CURRENT_TIME, CURRENT_TIMESTAMP, DELETE, DELETE_FROM, DESC, DIFFERENT, DISTINCT, DIVISION, ELSE, EMPTY, END, ENTRY, EQUAL, ESCAPE, EXCEPT, EXISTS, EXTRACT, FALSE, FETCH, FIRST, FROM, FUNC, FUNCTION, GREATER_THAN, GREATER_THAN_OR_EQUAL, GROUP_BY, HAVING, IN, INDEX, INNER, INNER_JOIN, INNER_JOIN_FETCH, INTERSECT, IS, IS_EMPTY, IS_NOT_EMPTY, IS_NOT_NULL, IS_NULL, JOIN, JOIN_FETCH, KEY, LAST, LEADING, LEFT, LEFT_JOIN, LEFT_JOIN_FETCH, LEFT_OUTER_JOIN, LEFT_OUTER_JOIN_FETCH, LENGTH, LIKE, LOCATE, LOWER, LOWER_THAN, LOWER_THAN_OR_EQUAL, MAX, MEMBER, MEMBER_OF, MIN, MINUS, MOD, MULTIPLICATION, NAMED_PARAMETER, NEW, NOT, NOT_BETWEEN, NOT_EQUAL, NOT_EXISTS, NOT_IN, NOT_LIKE, NOT_MEMBER, NOT_MEMBER_OF, NULL, NULLIF, NULLS, NULLS_FIRST, NULLS_LAST, OBJECT, OF, ON, OPERATOR, OR, ORDER_BY, ORDER_SIBLINGS_BY, OUTER, PLUS, POSITION, POSITIONAL_PARAMETER, QUOTE, REGEXP, SCN, SELECT, SET, SIZE, SOME, SQL, SQRT, START_WITH, SUBSTRING, SUM, TABLE, THEN, TIMESTAMP, TRAILING, TREAT, TRIM, TRUE, TYPE, UNION, UNKNOWN, UPDATE, UPPER, VALUE, WHEN, WHERE

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`ListIterable<Expression>`	`children()`	Returns the children of this `Expression`.
`JPQLQueryBNF`	`findQueryBNF(Expression expression)`	Retrieves the `JPQLQueryBNF` that represents the fragment of this `Expression` that was used when parsing the given `Expression`.
`JPQLGrammar`	`getGrammar()`	Returns the `JPQLGrammar` that defines how the JPQL query was parsed.
`JPAVersion`	`getIdentifierVersion(String identifier)`	Retrieves the JPA version in which the identifier was first introduced.
`int`	`getLength()`	Returns the length of the string representation of this `Expression`, which is the length of the text generated by `Expression.toActualText()`.
`int`	`getOffset()`	Returns the position of this `Expression` within its parent hierarchy.
`AbstractExpression`	`getParent()`	Returns the parent of this `Expression`.
`JPQLQueryBNF`	`getQueryBNF(String queryBNFID)`	Retrieves the BNF object that was registered for the given unique identifier.
`JPQLExpression`	`getRoot()`	Retrieves the root node of the parsed tree hierarchy.
`boolean`	`isAncestor(Expression expression)`	Determines whether this `Expression` is a parent of the given `Expression`.
`ListIterable<Expression>`	`orderedChildren()`	Returns the list representing this `Expression` and its children.
`void`	`populatePosition(QueryPosition queryPosition, int position)`	Retrieves the `Expression` located at the given position using the actual query, which may have extra whitespace.
`String`	`toActualText()`	Generates a string representation of this `Expression`, which needs to include any characters that are considered virtual, i.e.
`String`	`toParsedText()`	Returns a string representation of this `Expression` and its children.
`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.parser.Expression
accept, acceptChildren, getQueryBNF

- Field Detail
  - COMMA
```
public static final char COMMA
```
    The constant for ','.
    
    See Also:
    
    Constant Field Values
  - DOT
```
public static final char DOT
```
    The constant for '.'.
    
    See Also:
    
    Constant Field Values
  - DOUBLE_QUOTE
```
public static final char DOUBLE_QUOTE
```
    The constant for '"'.
    
    See Also:
    
    Constant Field Values
  - LEFT_CURLY_BRACKET
```
public static final char LEFT_CURLY_BRACKET
```
    The constant for '{'.
    
    See Also:
    
    Constant Field Values
  - LEFT_PARENTHESIS
```
public static final char LEFT_PARENTHESIS
```
    The constant for '('.
    
    See Also:
    
    Constant Field Values
  - NOT_DEFINED
```
public static final char NOT_DEFINED
```
    The constant for a character that is not defined.
    
    See Also:
    
    Constant Field Values
  - RIGHT_CURLY_BRACKET
```
public static final char RIGHT_CURLY_BRACKET
```
    The constant for '}'.
    
    See Also:
    
    Constant Field Values
  - RIGHT_PARENTHESIS
```
public static final char RIGHT_PARENTHESIS
```
    The constant for ')'.
    
    See Also:
    
    Constant Field Values
  - SINGLE_QUOTE
```
public static final char SINGLE_QUOTE
```
    The constant for '''.
    
    See Also:
    
    Constant Field Values
  - SPACE
```
public static final char SPACE
```
    The constant for ' '.
    
    See Also:
    
    Constant Field Values
  - UNDERSCORE
```
public static final char UNDERSCORE
```
    The constant for '_'.
    
    See Also:
    
    Constant Field Values
- Method Detail
  - children
```
public final ListIterable<Expression> children()
```
    Returns the children of this Expression.
    
    Specified by:
    
    children in interface Expression
    
    Returns:
    
    The children of this Expression or an empty ListIterable
  - findQueryBNF
```
public JPQLQueryBNF findQueryBNF(Expression expression)
```
    Retrieves the JPQLQueryBNF that represents the fragment of this Expression that was used when parsing the given Expression.
    
    Specified by:
    
    findQueryBNF in interface Expression
    
    Parameters:
    
    expression - The Expression that is a descendant of this one
    
    Returns:
    
    The JPQLQueryBNF that was used to parse the given expression
  - getGrammar
```
public JPQLGrammar getGrammar()
```
    Returns the JPQLGrammar that defines how the JPQL query was parsed.
    
    Specified by:
    
    getGrammar in interface Expression
    
    Returns:
    
    The JPQLGrammar that was used to parse this Expression
  - getIdentifierVersion
```
public JPAVersion getIdentifierVersion(String identifier)
```
    Retrieves the JPA version in which the identifier was first introduced.
    
    Returns:
    
    The version in which the identifier was introduced
  - getLength
```
public final int getLength()
```
    Returns the length of the string representation of this Expression, which is the length of the text generated by Expression.toActualText().
    
    Specified by:
    
    getLength in interface Expression
    
    Returns:
    
    The length of the string representation of this Expression
  - getOffset
```
public final int getOffset()
```
    Returns the position of this Expression within its parent hierarchy.
    
    Specified by:
    
    getOffset in interface Expression
    
    Returns:
    
    The length of the string representation of what is coming before this object
  - getParent
```
public final AbstractExpression getParent()
```
    Returns the parent of this Expression.
    
    Specified by:
    
    getParent in interface Expression
    
    Returns:
    
    The parent of this Expression, which is never null except for the root of the tree
  - getQueryBNF
```
public JPQLQueryBNF getQueryBNF(String queryBNFID)
```
    Retrieves the BNF object that was registered for the given unique identifier.
    
    Parameters:
    
    queryBNFID - The unique identifier of the JPQLQueryBNF to retrieve
    
    Returns:
    
    The JPQLQueryBNF representing a section of the grammar
  - getRoot
```
public final JPQLExpression getRoot()
```
    Retrieves the root node of the parsed tree hierarchy.
    
    Specified by:
    
    getRoot in interface Expression
    
    Returns:
    
    The root of the Expression tree
  - isAncestor
```
public boolean isAncestor(Expression expression)
```
    Determines whether this Expression is a parent of the given Expression.
    
    Specified by:
    
    isAncestor in interface Expression
    
    Parameters:
    
    expression - The Expression to verify its paternity with this Expression
    
    Returns:
    
    true if this Expression is the same as the given Expression or one of its parent; false otherwise
  - orderedChildren
```
public final ListIterable<Expression> orderedChildren()
```
    Returns the list representing this Expression and its children.
    
    Specified by:
    
    orderedChildren in interface Expression
    
    Returns:
    
    The Expressions representing this Expression
  - populatePosition
```
public void populatePosition(QueryPosition queryPosition,
                             int position)
```
    Retrieves the Expression located at the given position using the actual query, which may have extra whitespace.
    
    Specified by:
    
    populatePosition in interface Expression
    
    position - The array has one element and is the position of the Expression to retrieve
  - toActualText
```
public String toActualText()
```
    Generates a string representation of this Expression, which needs to include any characters that are considered virtual, i.e. that was parsed when the query is incomplete and is needed for functionality like content assist.
    
    Specified by:
    
    toActualText in interface Expression
    
    Returns:
    
    The string representation of this Expression
  - toParsedText
```
public String toParsedText()
```
    Returns a string representation of this Expression and its children. The expression should contain whitespace even if the beautified version would not have any. For instance, "SELECT e " should be returned where Expression.toParsedText() would return "SELECT e".
    
    Specified by:
    
    toParsedText in interface Expression
    
    Returns:
    
    The string representation of this Expression
  - toString
```
public final String toString()
```
    Overrides:
    
    toString in class Object

Class AbstractExpression

Field Summary

Fields inherited from interface org.eclipse.persistence.jpa.jpql.parser.Expression

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface org.eclipse.persistence.jpa.jpql.parser.Expression

Field Detail

COMMA

DOT

DOUBLE_QUOTE

LEFT_CURLY_BRACKET

LEFT_PARENTHESIS

NOT_DEFINED

RIGHT_CURLY_BRACKET

RIGHT_PARENTHESIS

SINGLE_QUOTE

SPACE

UNDERSCORE

Method Detail

children

findQueryBNF

getGrammar

getIdentifierVersion

getLength

getOffset

getParent

getQueryBNF

getRoot

isAncestor

orderedChildren

populatePosition

toActualText

toParsedText

toString