org.datanucleus.query.expression
Class ParameterExpression

java.lang.Object
  org.datanucleus.query.expression.Expression
      org.datanucleus.query.expression.ParameterExpression

public class ParameterExpression
extends Expression

Expression representing an implicit parameter. Explicit parameters will be represented as a PrimaryExpression. TODO Represent explicit parameters using this expression type.

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

left, LOCALISER, lowestOperator, op, OP_ADD, OP_AND, OP_BETWEEN, 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_OR, OP_SUB, right, symbol

Constructor Summary

ParameterExpression(SymbolTable symtbl, java.lang.String name, int position)

Method Summary

Symbol	bind()
java.lang.Object	evaluate(ExpressionEvaluator eval)
java.lang.String	getId()
int	getPosition()
java.lang.String	toString()

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

getLeft, getOperator, getRight, getSymbol

Methods inherited from class java.lang.Object

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

Constructor Detail

ParameterExpression

public ParameterExpression(SymbolTable symtbl,
                           java.lang.String name,
                           int position)

Method Detail

evaluate

public java.lang.Object evaluate(ExpressionEvaluator eval)

Specified by:

evaluate in class Expression

getId

public java.lang.String getId()

getPosition

public int getPosition()

bind

public Symbol bind()

Specified by:

bind in class Expression

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object