public final class ComparisonExpression extends CompoundExpression
There is one exception to this rule: it is valid to compare numeric values for which the rules of numeric promotion apply. Conditional expressions attempting to compare non-like type values are disallowed except for this numeric case.
Note that the arithmetic operators and comparison operators are permitted to be applied to state-fields and input parameters of the wrapped Java class equivalents to the primitive numeric Java types. Two entities of the same abstract schema type are equal if and only if they have the same primary key value. Only equality/inequality comparisons over enumeration constants are required to be supported.
JPA 1.0 - BNF:
comparison_expression ::= string_expression comparison_operator {string_expression | all_or_any_expression} |
boolean_expression {=| <>} {boolean_expression | all_or_any_expression} |
enum_expression {=| <>} {enum_expression | all_or_any_expression} |
datetime_expression comparison_operator {datetime_expression | all_or_any_expression} |
entity_expression {=| <>} {entity_expression | all_or_any_expression} |
arithmetic_expression comparison_operator {arithmetic_expression | all_or_any_expression}comparison_expression ::= string_expression comparison_operator {string_expression | all_or_any_expression} |
boolean_expression {=| <>} {boolean_expression | all_or_any_expression} |
enum_expression {=| <>} {enum_expression | all_or_any_expression} |
datetime_expression comparison_operator {datetime_expression | all_or_any_expression} |
entity_expression {=| <>} {entity_expression | all_or_any_expression} |
arithmetic_expression comparison_operator {arithmetic_expression | all_or_any_expression} |
entity_type_expression {=| <>} entity_type_expression}COMMA, DOT, DOUBLE_QUOTE, LEFT_CURLY_BRACKET, LEFT_PARENTHESIS, NOT_DEFINED, RIGHT_CURLY_BRACKET, RIGHT_PARENTHESIS, SINGLE_QUOTE, SPACE, UNDERSCOREABS, 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| Constructor and Description |
|---|
ComparisonExpression(AbstractExpression parent,
java.lang.String identifier)
Creates a new
ComparisonExpression. |
| Modifier and Type | Method and Description |
|---|---|
void |
accept(ExpressionVisitor visitor)
Visits this
Expression by the given visitor. |
java.lang.String |
getComparisonOperator()
Returns the comparison operator, which is either '=', '>', '>=', '<', '<=' or '<>'.
|
java.lang.String |
getLeftExpressionQueryBNFId()
Returns the unique identifier of the
JPQLQueryBNF for the left expression. |
JPQLQueryBNF |
getQueryBNF()
Returns the BNF of this
Expression. |
java.lang.String |
getRightExpressionQueryBNFId()
Returns the unique identifier of the
JPQLQueryBNF for the right expression. |
protected boolean |
isParsingComplete(WordParser wordParser,
java.lang.String word,
Expression expression)
Determines whether the parsing is complete based on what is left in the given text.
|
protected java.lang.String |
parseIdentifier(WordParser wordParser)
Parses the identifier of this expression.
|
acceptChildren, addChildrenTo, addOrderedChildrenTo, findQueryBNF, getActualIdentifier, getIdentifier, getLeftExpression, getRightExpression, hasLeftExpression, hasRightExpression, hasSpaceAfterIdentifier, parse, setLeftExpression, setRightExpression, toParsedTextacceptUnknownVisitor, acceptUnknownVisitor, buildExpressionFromFallingBack, buildNullExpression, buildStringExpression, buildStringExpression, buildUnknownExpression, calculatePosition, children, findFallBackExpressionFactory, getExpressionFactory, getExpressionRegistry, getGrammar, getIdentifierVersion, getJPAVersion, getLength, getOffset, getParent, getQueryBNF, getRoot, getText, handleAggregate, handleCollection, isAncestor, isIdentifier, isNull, isTolerant, isUnknown, isVirtual, orderedChildren, parse, parseUsingExpressionFactory, populatePosition, rebuildActualText, rebuildParsedText, setParent, setText, shouldParseWithFactoryFirst, shouldSkipLiteral, toActualText, toParsedText, toStringpublic ComparisonExpression(AbstractExpression parent, java.lang.String identifier)
ComparisonExpression.parent - The parent of this expressionidentifier - The comparator identifierpublic void accept(ExpressionVisitor visitor)
Expression by the given visitor.visitor - The ExpressionVisitor to visit this objectpublic java.lang.String getComparisonOperator()
public java.lang.String getLeftExpressionQueryBNFId()
JPQLQueryBNF for the left expression.getLeftExpressionQueryBNFId in class CompoundExpressionpublic JPQLQueryBNF getQueryBNF()
Expression.JPQLQueryBNF, which represents the grammar of this Expressionpublic java.lang.String getRightExpressionQueryBNFId()
JPQLQueryBNF for the right expression.getRightExpressionQueryBNFId in class CompoundExpressionprotected boolean isParsingComplete(WordParser wordParser, java.lang.String word, Expression expression)
isParsingComplete in class AbstractExpressionwordParser - The text to parse based on the current position of the cursorword - The word that was retrieved from the given text, which is the first word in the textexpression - The Expression that has already been parsedtrue if the text no longer can't be parsed by the current expression;
false if more can be parsedprotected java.lang.String parseIdentifier(WordParser wordParser)
parseIdentifier in class CompoundExpressionwordParser - The WordParser containing the text to parse, which starts with the identifier