Class AbstractConditionalClause
- java.lang.Object
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- org.eclipse.persistence.jpa.jpql.parser.AbstractExpression
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- org.eclipse.persistence.jpa.jpql.parser.AbstractConditionalClause
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- 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
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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 Concrete Methods Modifier and Type Method Description void
acceptChildren(ExpressionVisitor visitor)
Visits the children of thisExpression
.CollectionExpression
buildCollectionExpression()
Creates a newCollectionExpression
that will wrap the single select item.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.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
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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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buildCollectionExpression
public CollectionExpression buildCollectionExpression()
Creates a newCollectionExpression
that will wrap the single select item.- Returns:
- The single select item represented by a temporary collection
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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 identifier that was actually parsed
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getConditionalExpression
public final Expression getConditionalExpression()
Returns the expression representing the composition of the conditional expressions.- Returns:
- The actual conditional expression
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getIdentifier
public final String getIdentifier()
Returns the JPQL identifier of this expression.- Returns:
- The JPQL identifier
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hasConditionalExpression
public final boolean hasConditionalExpression()
Determines whether the conditional expression was parsed.- Returns:
true
if there is a conditional expression;false
otherwise
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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
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