Class CompoundExpression
- java.lang.Object
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- org.eclipse.persistence.jpa.jpql.parser.AbstractExpression
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- org.eclipse.persistence.jpa.jpql.parser.CompoundExpression
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- 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
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Field Summary
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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
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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
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Method Summary
All Methods Instance Methods Abstract Methods Concrete Methods Modifier and Type Method Description void
acceptChildren(ExpressionVisitor visitor)
Visits the children of thisExpression
.JPQLQueryBNF
findQueryBNF(Expression expression)
Retrieves theJPQLQueryBNF
that represents the fragment of thisExpression
that was used when parsing the givenExpression
.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 theExpression
that represents the first expression, which is before the identifier.abstract String
getLeftExpressionQueryBNFId()
Returns the unique identifier of theJPQLQueryBNF
for the left expression.Expression
getRightExpression()
Returns theExpression
that represents the second expression, which is after the identifier.abstract String
getRightExpressionQueryBNFId()
Returns the unique identifier of theJPQLQueryBNF
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
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Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait
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Methods inherited from interface org.eclipse.persistence.jpa.jpql.parser.Expression
accept, getQueryBNF
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Method Detail
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acceptChildren
public void acceptChildren(ExpressionVisitor visitor)
Visits the children of thisExpression
. This method can be used to optimize traversing the children since a new list is not created every timeExpression.children()
is called.This does not traverse the
Expression
sub-hierarchy, use a subclass ofAbstractTraverseChildrenVisitor
in order to traverse the entire sub-hierarchy.- Parameters:
visitor
- Thevisitor
to visit the children of this object.
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findQueryBNF
public JPQLQueryBNF findQueryBNF(Expression expression)
Retrieves theJPQLQueryBNF
that represents the fragment of thisExpression
that was used when parsing the givenExpression
.- Specified by:
findQueryBNF
in interfaceExpression
- Overrides:
findQueryBNF
in classAbstractExpression
- Parameters:
expression
- TheExpression
that is a descendant of this one- Returns:
- The
JPQLQueryBNF
that was used to parse the given expression
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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
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getIdentifier
public String getIdentifier()
Returns the JPQL identifier of this expression.- Returns:
- The JPQL identifier
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getLeftExpression
public final Expression getLeftExpression()
Returns theExpression
that represents the first expression, which is before the identifier.- Returns:
- The expression that was parsed representing the first expression
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getLeftExpressionQueryBNFId
public abstract String getLeftExpressionQueryBNFId()
Returns the unique identifier of theJPQLQueryBNF
for the left expression.- Returns:
- The ID of the BNF used when parsing the expression before the identifier
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getRightExpression
public final Expression getRightExpression()
Returns theExpression
that represents the second expression, which is after the identifier.- Returns:
- The expression that was parsed representing the second expression
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getRightExpressionQueryBNFId
public abstract String getRightExpressionQueryBNFId()
Returns the unique identifier of theJPQLQueryBNF
for the right expression.- Returns:
- The ID of the BNF used when parsing the expression after the identifier
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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
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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
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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
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