org.apache.cayenne.ejbql

Interface EJBQLExpression

All Known Subinterfaces:

Node

All Known Implementing Classes:

AggregateConditionNode, EJBQLAbs, EJBQLAbstractSchemaName, EJBQLAdd, EJBQLAggregate, EJBQLAggregateColumn, EJBQLAll, EJBQLAnd, EJBQLAny, EJBQLAscending, EJBQLAverage, EJBQLBetween, EJBQLBooleanLiteral, EJBQLClassName, EJBQLConcat, EJBQLConstructor, EJBQLConstructorParameter, EJBQLConstructorParameters, EJBQLCount, EJBQLCurrentDate, EJBQLCurrentTime, EJBQLCurrentTimestamp, EJBQLDbPath, EJBQLDecimalLiteral, EJBQLDelete, EJBQLDescending, EJBQLDistinct, EJBQLDivide, EJBQLEquals, EJBQLEscapeCharacter, EJBQLExists, EJBQLFrom, EJBQLFromItem, EJBQLGreaterOrEqual, EJBQLGreaterThan, EJBQLGroupBy, EJBQLHaving, EJBQLIdentificationVariable, EJBQLIdentifier, EJBQLIn, EJBQLInnerFetchJoin, EJBQLInnerJoin, EJBQLIntegerLiteral, EJBQLIsEmpty, EJBQLIsNull, EJBQLJoin, EJBQLLength, EJBQLLessOrEqual, EJBQLLessThan, EJBQLLike, EJBQLLocate, EJBQLLower, EJBQLMax, EJBQLMemberOf, EJBQLMin, EJBQLMod, EJBQLMultiply, EJBQLNamedInputParameter, EJBQLNegative, EJBQLNot, EJBQLNotEquals, EJBQLOr, EJBQLOrderBy, EJBQLOrderByItem, EJBQLOuterFetchJoin, EJBQLOuterJoin, EJBQLPath, EJBQLPatternValue, EJBQLPositionalInputParameter, EJBQLSelect, EJBQLSelectClause, EJBQLSelectExpression, EJBQLSelectExpressions, EJBQLSize, EJBQLSqrt, EJBQLStringLiteral, EJBQLSubselect, EJBQLSubstring, EJBQLSubtract, EJBQLSum, EJBQLTok, EJBQLTrim, EJBQLTrimBoth, EJBQLTrimCharacter, EJBQLTrimLeading, EJBQLTrimSpecification, EJBQLTrimTrailing, EJBQLUpdate, EJBQLUpdateField, EJBQLUpdateItem, EJBQLUpdateValue, EJBQLUpper, EJBQLWhere, SimpleNode

public interface EJBQLExpression

An abstract EJBQL expression interface.

Since:

3.0

Method Summary

Modifier and Type	Method and Description
EJBQLExpression	getChild(int index) Returns a child expression node at the specified index.
int	getChildrenCount() Returns a number of child operands of this expression node.
String	getText() Returns a text property of the node.
boolean	isNegated() Returns an optional boolean flag that negates the value of the expression.
void	visit(EJBQLExpressionVisitor visitor) Accepts a visitor, calling appropriate visitor method.

Method Detail

visit

void visit(EJBQLExpressionVisitor visitor)

Accepts a visitor, calling appropriate visitor method. If the visitor method returns true, visits all children, otherwise stops.

getChildrenCount

int getChildrenCount()

Returns a number of child operands of this expression node.

getChild

EJBQLExpression getChild(int index)

Returns a child expression node at the specified index.

getText

String getText()

Returns a text property of the node.

isNegated

boolean isNegated()

Returns an optional boolean flag that negates the value of the expression.