org.datanucleus.query.expression
Class ParameterExpression

java.lang.Object
  extended by org.datanucleus.query.expression.Expression
      extended by 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


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