org.jpox.store.expression
Class JDOHelperExpression

java.lang.Object
  org.jpox.store.expression.ScalarExpression
      org.jpox.store.expression.JDOHelperExpression

public class JDOHelperExpression
extends ScalarExpression

Representation of JDOHelper in JDOQL

Version:

$Revision: 1.9 $

Nested Class Summary

Nested classes/interfaces inherited from class org.jpox.store.expression.ScalarExpression

ScalarExpression.DyadicOperator, ScalarExpression.ExpressionList, ScalarExpression.FieldExpression, ScalarExpression.IllegalArgumentTypeException, ScalarExpression.IllegalOperationException, ScalarExpression.MethodInvocationException, ScalarExpression.MonadicOperator, ScalarExpression.Operator

Field Summary

Fields inherited from class org.jpox.store.expression.ScalarExpression

aliasIdentifier, expressionList, FILTER, LOCALISER, lowestOperator, mapping, OP_ADD, OP_AND, OP_BETWEEN, OP_COM, OP_CONCAT, 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, PROJECTION, qs, st, te

Constructor Summary

JDOHelperExpression(QueryExpression qs)
Constructor.

Method Summary

ScalarExpression

getObjectIdMethod(ScalarExpression expr) Returns an object expression for the argument.

Methods inherited from class org.jpox.store.expression.ScalarExpression

accessField, add, and, as, callMethod, cast, com, div, encloseWithInParentheses, eor, eq, equals, getAlias, getExpressionList, getLogicSetExpression, getMapping, getNonAliasExpression, getQueryExpression, gt, gteq, in, instanceOf, ior, lt, lteq, mod, mul, neg, not, noteq, sub, toStatementText, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

JDOHelperExpression

public JDOHelperExpression(QueryExpression qs)

Constructor.

Parameters:

qs - The query expression

Method Detail

getObjectIdMethod

public ScalarExpression getObjectIdMethod(ScalarExpression expr)

Returns an object expression for the argument.

Parameters:

expr - the expression

Returns:

the returned value for an object expression argument is the argument itself. The returned for a literal argument is a ObjectLiteral or NullLiteral