org.jpox.store.expression
Class BooleanExpression

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

Direct Known Subclasses:

BooleanBitColumnExpression, BooleanCharColumnExpression, BooleanLiteral, ExistsExpression

public class BooleanExpression
extends ScalarExpression

Representation of a Boolean expression in a Query.

Version:

$Revision: 1.12 $

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

protected	BooleanExpression(QueryExpression qs) Constructor
	BooleanExpression(QueryExpression qs, JavaTypeMapping mapping, LogicSetExpression te)
	BooleanExpression(ScalarExpression.MonadicOperator op, ScalarExpression operand) Perform a boolean operator op on a operand operand
	BooleanExpression(ScalarExpression operand1, ScalarExpression.DyadicOperator op, ScalarExpression operand2) Perform a boolean operator op between two operands operand1 and operand2

Method Summary

BooleanExpression	and(ScalarExpression expr) Conditional And.
BooleanExpression	eor(ScalarExpression expr) Exclusive OR
BooleanExpression	eq(ScalarExpression expr) Equality operator (equals to)
BooleanExpression	in(ScalarExpression expr) In expression.
BooleanExpression	ior(ScalarExpression expr) Conditional OR.
ScalarExpression	neg() Unary Minus Operator
BooleanExpression	not() Logical complement
BooleanExpression	noteq(ScalarExpression expr) Equality operator (not equals to)

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

accessField, add, as, callMethod, cast, com, div, encloseWithInParentheses, equals, getAlias, getExpressionList, getLogicSetExpression, getMapping, getNonAliasExpression, getQueryExpression, gt, gteq, instanceOf, lt, lteq, mod, mul, sub, toStatementText, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

BooleanExpression

protected BooleanExpression(QueryExpression qs)

Constructor

Parameters:

qs - the QueryExpression

BooleanExpression

public BooleanExpression(QueryExpression qs,
                         JavaTypeMapping mapping,
                         LogicSetExpression te)

Parameters:

qs - the QueryExpression

mapping - the mapping associated to this expression

te - the TableExpression where this expression refers to

BooleanExpression

public BooleanExpression(ScalarExpression.MonadicOperator op,
                         ScalarExpression operand)

Perform a boolean operator op on a operand operand

Parameters:

op - the operator

operand - the operand

BooleanExpression

public BooleanExpression(ScalarExpression operand1,
                         ScalarExpression.DyadicOperator op,
                         ScalarExpression operand2)

Perform a boolean operator op between two operands operand1 and operand2

Parameters:

op - the operator

operand1 - the operand

operand2 - the operand

Method Detail

and

public BooleanExpression and(ScalarExpression expr)

Description copied from class: ScalarExpression

Conditional And. Evaluates its right-hand operand only if the value of its left-hand operand is true.

Overrides:

and in class ScalarExpression

Parameters:

expr - the right-hand operand

Returns:

the result value is true if both operand values are true; otherwise, the result is false.

eor

public BooleanExpression eor(ScalarExpression expr)

Description copied from class: ScalarExpression

Exclusive OR

Overrides:

eor in class ScalarExpression

Parameters:

expr - the right-hand operand

Returns:

the result value is the bitwise exclusive OR of the operand values.

ior

public BooleanExpression ior(ScalarExpression expr)

Description copied from class: ScalarExpression

Conditional OR. Evaluates its right-hand operand only if the value of its left-hand operand is false.

Overrides:

ior in class ScalarExpression

Parameters:

expr - the right-hand operand

Returns:

the result value is false if both operand values are false; otherwise, the result is true.

not

public BooleanExpression not()

Description copied from class: ScalarExpression

Logical complement

Overrides:

not in class ScalarExpression

Returns:

the result value is false if operand is true; otherwise, the result is true.

eq

public BooleanExpression eq(ScalarExpression expr)

Description copied from class: ScalarExpression

Equality operator (equals to)

Overrides:

eq in class ScalarExpression

Parameters:

expr - the right-hand operand

Returns:

The type of an equality expression is a boolean

noteq

public BooleanExpression noteq(ScalarExpression expr)

Description copied from class: ScalarExpression

Equality operator (not equals to)

Overrides:

noteq in class ScalarExpression

Parameters:

expr - the right-hand operand

Returns:

The type of an equality expression is a boolean

in

public BooleanExpression in(ScalarExpression expr)

Description copied from class: ScalarExpression

In expression. Return true if this is contained by expr

Overrides:

in in class ScalarExpression

Parameters:

expr - the right-hand expression

Returns:

true if the left-hand expression is contained by the right-hand expression. Otherwise the result is false.

neg

public ScalarExpression neg()

Description copied from class: ScalarExpression

Unary Minus Operator

Overrides:

neg in class ScalarExpression

Returns:

the type of the unary minus expression is the promoted type of the operand.