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

All Implemented Interfaces:

Expression

Direct Known Subclasses:

ArithmeticExpression, ComparisonExpression, LogicalExpression
```
public abstract class CompoundExpression
extends AbstractExpression
```
A compound expression has a left and right expressions combined by an identifier.
BNF: expression ::= left_expression identifier right_expression

Since:

2.3

Version:

2.5

Author:

Pascal Filion

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 Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`acceptChildren(ExpressionVisitor visitor)`	Visits 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`.
`String`	`getActualIdentifier()`	Returns the actual identifier found in the string representation of the JPQL query, which has the actual case that was used.
`String`	`getIdentifier()`	Returns the JPQL identifier of this expression.
`Expression`	`getLeftExpression()`	Returns the `Expression` that represents the first expression, which is before the identifier.
`abstract String`	`getLeftExpressionQueryBNFId()`	Returns the unique identifier of the `JPQLQueryBNF` for the left expression.
`Expression`	`getRightExpression()`	Returns the `Expression` that represents the second expression, which is after the identifier.
`abstract String`	`getRightExpressionQueryBNFId()`	Returns the unique identifier of the `JPQLQueryBNF` for the right expression.
`boolean`	`hasLeftExpression()`	Determines whether the first expression of the query was parsed.
`boolean`	`hasRightExpression()`	Determines whether the second expression of the query was parsed.
`boolean`	`hasSpaceAfterIdentifier()`	Determines whether a whitespace was parsed after the identifier.

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.
  - 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 JPQL identifier that was actually parsed
  - getIdentifier
```
public String getIdentifier()
```
    Returns the JPQL identifier of this expression.
    
    Returns:
    
    The JPQL identifier
  - getLeftExpression
```
public final Expression getLeftExpression()
```
    Returns the Expression that represents the first expression, which is before the identifier.
    
    Returns:
    
    The expression that was parsed representing the first expression
  - getLeftExpressionQueryBNFId
```
public abstract String getLeftExpressionQueryBNFId()
```
    Returns the unique identifier of the JPQLQueryBNF for the left expression.
    
    Returns:
    
    The ID of the BNF used when parsing the expression before the identifier
  - getRightExpression
```
public final Expression getRightExpression()
```
    Returns the Expression that represents the second expression, which is after the identifier.
    
    Returns:
    
    The expression that was parsed representing the second expression
  - getRightExpressionQueryBNFId
```
public abstract String getRightExpressionQueryBNFId()
```
    Returns the unique identifier of the JPQLQueryBNF for the right expression.
    
    Returns:
    
    The ID of the BNF used when parsing the expression after the identifier
  - hasLeftExpression
```
public final boolean hasLeftExpression()
```
    Determines whether the first expression of the query was parsed.
    
    Returns:
    
    true if the first expression was parsed; false if it was not parsed
  - hasRightExpression
```
public final boolean hasRightExpression()
```
    Determines whether the second expression of the query was parsed.
    
    Returns:
    
    true if the second expression was parsed; false if it was not parsed
  - hasSpaceAfterIdentifier
```
public final boolean hasSpaceAfterIdentifier()
```
    Determines whether a whitespace was parsed after the identifier.
    
    Returns:
    
    true if there was a whitespace after the identifier; false otherwise

Class CompoundExpression

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

findQueryBNF

getActualIdentifier

getIdentifier

getLeftExpression

getLeftExpressionQueryBNFId

getRightExpression

getRightExpressionQueryBNFId

hasLeftExpression

hasRightExpression

hasSpaceAfterIdentifier