org.datanucleus.query.expression

Class PrimaryExpression

java.lang.Object

org.datanucleus.query.expression.Expression

org.datanucleus.query.expression.PrimaryExpression

All Implemented Interfaces:

Serializable

public class PrimaryExpression
extends Expression

Expression for a primary object. This may be a field, or an explicit variable/parameter, or a field invoked on an expression.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.datanucleus.query.expression.Expression

Expression.DyadicOperator, Expression.MonadicOperator, Expression.Operator

Field Summary

Fields inherited from class org.datanucleus.query.expression.Expression

alias, left, LOCALISER, op, OP_ADD, OP_AND, OP_CAST, OP_COM, OP_CONCAT, OP_DISTINCT, OP_DIV, OP_EQ, OP_GT, OP_GTEQ, OP_IN, OP_IS, OP_ISNOT, OP_LIKE, OP_LT, OP_LTEQ, OP_MOD, OP_MUL, OP_NEG, OP_NOT, OP_NOTEQ, OP_NOTIN, OP_OR, OP_SUB, parent, right, symbol

Constructor Summary

Constructors

Constructor and Description
PrimaryExpression(Expression left, List<String> tuples) PrimaryExpression on an expression.
PrimaryExpression(List<String> tuples) PrimaryExpression made up of a series of field names.

Method Summary

Methods

Modifier and Type	Method and Description
Symbol	bind(SymbolTable symtbl) Method to bind the expression to the symbol table as appropriate.
String	getId() Accessor for the expression "id".
List<String>	getTuples()
String	toString() Accessor for string form of the expression.

Methods inherited from class org.datanucleus.query.expression.Expression

evaluate, getAlias, getLeft, getOperator, getParent, getRight, getSymbol, setAlias, setLeft, setRight

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

PrimaryExpression

public PrimaryExpression(List<String> tuples)

PrimaryExpression made up of a series of field names. e.g "a.b.c"

Parameters:

tuples - The components of the expression

PrimaryExpression

public PrimaryExpression(Expression left,
                 List<String> tuples)

PrimaryExpression on an expression. e.g "((B)a).c" so the left expression is a CastExpression, and the tuples are "c".

Parameters:

left - The left expression

tuples - The tuples of the primary

Method Detail

getId

public String getId()

Accessor for the expression "id". This will be something like "a.b.c".

Returns:

The id

getTuples

public List<String> getTuples()

bind

public Symbol bind(SymbolTable symtbl)

Method to bind the expression to the symbol table as appropriate.

Specified by:

bind in class Expression

Parameters:

symtbl - Symbol Table

Returns:

The symbol for this expression

toString

public String toString()

Accessor for string form of the expression. Returns something like "PrimaryExpression {a.b.c}" when left is null, or "PrimaryExpression {ParameterExpression {a}.b.c}" when left is the ParameterExpression

Overrides:

toString in class Object