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

All Implemented Interfaces:

Expression

Direct Known Subclasses:

HavingClause, OnClause, StartWithClause, WhereClause
```
public abstract class AbstractConditionalClause
extends AbstractExpression
```
Conditional expressions are composed of other conditional expressions, comparison operations, logical operations, path expressions that evaluate to boolean values, boolean literals, and boolean input parameters. Arithmetic expressions can be used in comparison expressions. Arithmetic expressions are composed of other arithmetic expressions, arithmetic operations, path expressions that evaluate to numeric values, numeric literals, and numeric input parameters. Arithmetic operations use numeric promotion. Standard bracketing () for ordering expression evaluation is supported.
BNF: expression ::= identifier conditional_expression

Since:

2.3

Version:

2.5

Author:

Pascal Filion

See Also:

HavingClause, OnClause, StartWithClause, WhereClause

Field Summary
- Fields inherited from class org.eclipse.persistence.jpa.jpql.parser.AbstractExpression
  COMMA, DOT, DOUBLE_QUOTE, LEFT_CURLY_BRACKET, LEFT_PARENTHESIS, NOT_DEFINED, RIGHT_CURLY_BRACKET, RIGHT_PARENTHESIS, SINGLE_QUOTE, SPACE, UNDERSCORE
- 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
`void`	`acceptChildren(ExpressionVisitor visitor)`	Visits the children of this `Expression`.
`CollectionExpression`	`buildCollectionExpression()`	Creates a new `CollectionExpression` that will wrap the single select item.
`JPQLQueryBNF`	`findQueryBNF(Expression expression)`	Retrieves the `JPQLQueryBNF` that represents the fragment of this `Expression` that was used when parsing the given `Expression`.
`String`	`getActualIdentifier()`	Returns the actual identifier found in the string representation of the JPQL query, which has the actual case that was used.
`Expression`	`getConditionalExpression()`	Returns the expression representing the composition of the conditional expressions.
`String`	`getIdentifier()`	Returns the JPQL identifier of this expression.
`boolean`	`hasConditionalExpression()`	Determines whether the conditional expression was parsed.
`boolean`	`hasSpaceAfterIdentifier()`	Determines whether a whitespace was parsed after the identifier or not.

Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.AbstractExpression
children, getGrammar, getIdentifierVersion, getLength, getOffset, getParent, getQueryBNF, getRoot, isAncestor, orderedChildren, populatePosition, toActualText, toParsedText, 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, getQueryBNF

- Method Detail
  - acceptChildren
```
public void acceptChildren(ExpressionVisitor visitor)
```
    Visits the children of this Expression. This method can be used to optimize traversing the children since a new list is not created every time Expression.children() is called.
    This does not traverse the Expression sub-hierarchy, use a subclass of AbstractTraverseChildrenVisitor in order to traverse the entire sub-hierarchy.
    
    Parameters:
    
    visitor - The visitor to visit the children of this object.
  - buildCollectionExpression
```
public CollectionExpression buildCollectionExpression()
```
    Creates a new CollectionExpression that will wrap the single select item.
    
    Returns:
    
    The single select item represented by a temporary collection
  - 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
    
    Overrides:
    
    findQueryBNF in class AbstractExpression
    
    Parameters:
    
    expression - The Expression that is a descendant of this one
    
    Returns:
    
    The JPQLQueryBNF that was used to parse the given expression
  - getActualIdentifier
```
public final String getActualIdentifier()
```
    Returns the actual identifier found in the string representation of the JPQL query, which has the actual case that was used.
    
    Returns:
    
    The identifier that was actually parsed
  - getConditionalExpression
```
public final Expression getConditionalExpression()
```
    Returns the expression representing the composition of the conditional expressions.
    
    Returns:
    
    The actual conditional expression
  - getIdentifier
```
public final String getIdentifier()
```
    Returns the JPQL identifier of this expression.
    
    Returns:
    
    The JPQL identifier
  - hasConditionalExpression
```
public final boolean hasConditionalExpression()
```
    Determines whether the conditional expression was parsed.
    
    Returns:
    
    true if there is a conditional expression; false otherwise
  - hasSpaceAfterIdentifier
```
public final boolean hasSpaceAfterIdentifier()
```
    Determines whether a whitespace was parsed after the identifier or not.
    
    Returns:
    
    true if there was a whitespace after the identifier; false otherwise

Class AbstractConditionalClause

Field Summary

Fields inherited from class org.eclipse.persistence.jpa.jpql.parser.AbstractExpression

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

Method Summary

Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.AbstractExpression

Methods inherited from class java.lang.Object

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

Method Detail

acceptChildren

buildCollectionExpression

findQueryBNF

getActualIdentifier

getConditionalExpression

getIdentifier

hasConditionalExpression

hasSpaceAfterIdentifier