Package org.eclipse.persistence.jpa.jpql.parser

Class AndExpression

java.lang.Object

org.eclipse.persistence.jpa.jpql.parser.AbstractExpression

org.eclipse.persistence.jpa.jpql.parser.CompoundExpression

org.eclipse.persistence.jpa.jpql.parser.LogicalExpression

org.eclipse.persistence.jpa.jpql.parser.AndExpression

All Implemented Interfaces:

Expression

public final class AndExpression
extends LogicalExpression

The AND logical operator chains multiple criteria together. A valid operand of an AND operator must be one of: TRUE, FALSE, and NULL. The AND operator has a higher precedence than the OR operator.

NULL represents unknown. Therefore, if one operand is NULL and the other operand is FALSE the result is FALSE, because one FALSE operand is sufficient for a FALSE result. If one operand is NULL and the other operand is either TRUE or NULL, the result is NULL (unknown).

The following table shows how the AND operator is evaluated based on its two operands:

	TRUE	FALSE	NULL
TRUE	TRUE	FALSE	NULL
FALSE	FALSE	FALSE	FALSE
NULL	NULL	FALSE	NULL

BNF: conditional_term ::= conditional_term AND conditional_factor

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

Constructor Summary

Constructors

Constructor	Description
AndExpression(AbstractExpression parent)	Creates a new AndExpression.

Method Summary

Modifier and Type	Method	Description
void	accept(ExpressionVisitor visitor)	Visits this Expression by the given visitor.
String	getLeftExpressionQueryBNFId()	Returns the unique identifier of the JPQLQueryBNF for the left expression.
String	getRightExpressionQueryBNFId()	Returns the unique identifier of the JPQLQueryBNF for the right expression.
protected boolean	isParsingComplete(WordParser wordParser, String word, Expression expression)	Determines whether the parsing is complete based on what is left in the given text.

Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.LogicalExpression

getQueryBNF, parseIdentifier

Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.CompoundExpression

acceptChildren, addChildrenTo, addOrderedChildrenTo, findQueryBNF, getActualIdentifier, getIdentifier, getLeftExpression, getRightExpression, hasLeftExpression, hasRightExpression, hasSpaceAfterIdentifier, parse, setLeftExpression, setRightExpression, 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 Details

AndExpression

public AndExpression(AbstractExpression parent)

Creates a new AndExpression.

Parameters:

parent - The parent of this expression

Method Details

accept

public void accept(ExpressionVisitor visitor)

Visits this Expression by the given visitor.

Parameters:

visitor - The ExpressionVisitor to visit this object

getLeftExpressionQueryBNFId

public String getLeftExpressionQueryBNFId()

Returns the unique identifier of the JPQLQueryBNF for the left expression.

Specified by:

getLeftExpressionQueryBNFId in class CompoundExpression

Returns:

The ID of the BNF used when parsing the expression before the identifier

getRightExpressionQueryBNFId

public String getRightExpressionQueryBNFId()

Returns the unique identifier of the JPQLQueryBNF for the right expression.

Specified by:

getRightExpressionQueryBNFId in class CompoundExpression

Returns:

The ID of the BNF used when parsing the expression after the identifier

isParsingComplete

protected boolean isParsingComplete(WordParser wordParser,
 String word,
 Expression expression)

Determines whether the parsing is complete based on what is left in the given text. The text is never empty.

Overrides:

isParsingComplete in class LogicalExpression

Parameters:

wordParser - The text to parse based on the current position of the cursor

word - The word that was retrieved from the given text, which is the first word in the text

expression - The Expression that has already been parsed

Returns:

true if the text no longer can't be parsed by the current expression; false if more can be parsed