EclipseLink 2.4.2, build 'v20130514-5956486' API Reference

org.eclipse.persistence.jpa.jpql.parser
Class AbsExpression

java.lang.Object
  extended by org.eclipse.persistence.jpa.jpql.parser.AbstractExpression
      extended by org.eclipse.persistence.jpa.jpql.parser.AbstractEncapsulatedExpression
          extended by org.eclipse.persistence.jpa.jpql.parser.AbstractSingleEncapsulatedExpression
              extended by org.eclipse.persistence.jpa.jpql.parser.AbsExpression
All Implemented Interfaces:
Expression

public final class AbsExpression
extends AbstractSingleEncapsulatedExpression

The ABS function removes the minus sign from a specified argument and returns the absolute value, which is always a positive number or zero.

This is one of the JPQL arithmetic functions. The ABS function takes a numeric argument and returns a number (integer, float, or double) of the same type as the argument to the function.

JPA 1.0, 2.0:

BNF: expression ::= ABS(simple_arithmetic_expression)

JPA 2.1:

BNF: expression ::= ABS(arithmetic_expression)

Example: SELECT DISTINCT o FROM Order o WHERE o.totalPrice > ABS(:dbl)

Version:
2.4
Author:
Pascal Filion
Since:
2.3

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, ASC, AVG, BETWEEN, BIT_LENGTH, BOTH, CASE, CAST, CHAR_LENGTH, CHARACTER_LENGTH, CLASS, COALESCE, COLUMN, CONCAT, 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, 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, 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_FIRST, NULLS_LAST, OBJECT, OF, ON, OPERATOR, OR, ORDER_BY, OUTER, PLUS, POSITION, POSITIONAL_PARAMETER, QUOTE, REGEXP, SELECT, SET, SIZE, SOME, SQL, SQRT, SUBSTRING, SUM, TABLE, THEN, TRAILING, TREAT, TRIM, TRUE, TYPE, UNION, UNKNOWN, UPDATE, UPPER, VALUE, WHEN, WHERE
 
Constructor Summary
AbsExpression(AbstractExpression parent)
          Creates a new AbsExpression.
 
Method Summary
 void accept(ExpressionVisitor visitor)
          Visits this Expression by the given visitor.
 java.lang.String encapsulatedExpressionBNF()
          Returns the BNF used to parse the encapsulated expression.
 JPQLQueryBNF getQueryBNF()
          Returns the BNF of this Expression.
protected  java.lang.String parseIdentifier(WordParser wordParser)
          Parses the identifier of this expression.
 
Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.AbstractSingleEncapsulatedExpression
acceptChildren, addChildrenTo, addOrderedEncapsulatedExpressionTo, findQueryBNF, getExpression, hasEncapsulatedExpression, hasExpression, parseEncapsulatedExpression, removeEncapsulatedExpression, setExpression, toParsedTextEncapsulatedExpression
 
Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.AbstractEncapsulatedExpression
addOrderedChildrenTo, areLogicalIdentifiersSupported, getActualIdentifier, getIdentifier, hasLeftParenthesis, hasRightParenthesis, hasSpaceAfterIdentifier, isParsingComplete, parse, shouldParseRightParenthesis, toParsedText
 
Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.AbstractExpression
acceptUnknownVisitor, 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, toString
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

AbsExpression

public AbsExpression(AbstractExpression parent)
Creates a new AbsExpression.

Parameters:
parent - The parent of this expression
Method Detail

accept

public void accept(ExpressionVisitor visitor)
Visits this Expression by the given visitor.

Parameters:
visitor - The ExpressionVisitor to visit this object

encapsulatedExpressionBNF

public java.lang.String encapsulatedExpressionBNF()
Returns the BNF used to parse the encapsulated expression.

Specified by:
encapsulatedExpressionBNF in class AbstractSingleEncapsulatedExpression
Returns:
The BNF used to parse the encapsulated expression

getQueryBNF

public JPQLQueryBNF getQueryBNF()
Returns the BNF of this Expression.

Returns:
The JPQLQueryBNF, which represents the grammar of this Expression

parseIdentifier

protected java.lang.String parseIdentifier(WordParser wordParser)
Parses the identifier of this expression.

Specified by:
parseIdentifier in class AbstractEncapsulatedExpression
Returns:
The identifier for this expression

EclipseLink 2.4.2, build 'v20130514-5956486' API Reference