Package org.datanucleus.query.expression

Package providing expressions from which a (generically) compiled query is made up.

Interface Summary

Interface	Description
ExpressionEvaluator	Interface for an evaluator of an expression.

Class Summary

Class	Description
AbstractExpressionEvaluator	Abstract evaluator for an expression.
ArrayExpression	Expression representing an input array of expressions (or at least some of the array is of expressions).
CaseExpression	Expression representing a case series of when expressions and their action expressions.
ClassExpression	Expression representing a candidate in a FROM clause.
CreatorExpression	Expression representing something like "new X.Y.Z([param1[,param2[,param3]]])".
DyadicExpression	Expression between two other expressions and an operation.
Expression	A Scalar expression in a Query.
Expression.DyadicOperator	"Dyadic" operator performs operation on one or two operands.
Expression.MonadicOperator	"Monadic" operator performs a function on one operand.
Expression.Operator	Representation of an Operator.
ExpressionCompiler	Compiler for expressions.
InvokeExpression	Expression representing invocation of a method.
JoinExpression	Expression representing a join between a candidate class, and the class of a field of the first class.
Literal	Literal of some type (String, Double, Long, BigDecimal, etc).
OrderExpression	Expression as part of an ordering clause.
ParameterExpression	Expression representing a parameter.
PrimaryExpression	Expression for a primary object.
SubqueryExpression	Expression containing a subquery.
TypeExpression	Expression representing a the type of the contained expression.
VariableExpression	Expression representing a variable.

Enum Summary

Enum	Description
JoinExpression.JoinType

Exception Summary

Exception	Description
PrimaryExpressionIsClassLiteralException	Exception thrown when compiling a PrimaryExpression and we find that it really represents a Class literal, and so should be swapped in the expression tree.
PrimaryExpressionIsClassStaticFieldException	Exception thrown when compiling a PrimaryExpression and we find that it really represents a static field of a Class (literal), and so should be swapped in the Node tree.
PrimaryExpressionIsInvokeException	Exception thrown when compiling a PrimaryExpression and we find that it really represents an invocation of a method, and so should be swapped in the expression tree.
PrimaryExpressionIsVariableException	Exception thrown when compiling a PrimaryExpression and we find that it really represents an implicit variable, and so should be swapped in the expression tree.