org.jpox.store.expression
Class BooleanCharColumnExpression

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

public class BooleanCharColumnExpression
extends BooleanExpression

Representation of a BooleanChar column expression.

Version:

$Revision: 1.8 $

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

BooleanCharColumnExpression(QueryExpression qs, JavaTypeMapping mapping, LogicSetExpression te)
Constructor.

BooleanCharColumnExpression(QueryExpression qs, JavaTypeMapping mapping, LogicSetExpression te, boolean truthTest)
Constructor.

Method Summary

BooleanExpression	eq(ScalarExpression expr) Equality operator (equals to)
BooleanExpression	in(ScalarExpression expr) In expression.
BooleanExpression	not() Logical complement
BooleanExpression	noteq(ScalarExpression expr) Equality operator (not equals to)
StatementText	toStatementText(int mode) StatementText representation of this expression.

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

and, eor, ior, neg

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, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

BooleanCharColumnExpression

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

Constructor. Perform a positive truth test("this = 1").

Parameters:

qs - the QueryExpression

mapping - the mapping associated to this expression

te - the TableExpression where this expression refers to

BooleanCharColumnExpression

public BooleanCharColumnExpression(QueryExpression qs,
                                   JavaTypeMapping mapping,
                                   LogicSetExpression te,
                                   boolean truthTest)

Constructor. Perform a truth test

Parameters:

qs - the QueryExpression

mapping - the mapping associated to this expression

te - the TableExpression where this expression refers to

truthTest - true for positive ("this = 1"), 0 for negative ("this = 0")

Method Detail

not

public BooleanExpression not()

Description copied from class: ScalarExpression

Logical complement

Overrides:

not in class BooleanExpression

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 BooleanExpression

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 BooleanExpression

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 BooleanExpression

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.

toStatementText

public StatementText toStatementText(int mode)

Description copied from class: ScalarExpression

StatementText representation of this expression. I.E. A Boolean field may be stored in boolean format like 0 or 1, and it can also be stored in other formats, like Y or N, TRUE or FALSE, and so on. The projection mode for the boolean field is the real content of the value stored, (e.g. Y or N), and opposed to that the filter mode for the boolean field is always represented by a boolean expression (e.g. Y=Y or N=N) In SQL, the projection can be exemplified as "SELECT BOOLEAN_FIELD ... " and the filter as "SELECT COLUMNS ... WHERE BOOLEAN_FIELD ='Y'"

Overrides:

toStatementText in class ScalarExpression

Parameters:

mode - (0=PROJECTION;1=FILTER)

Returns:

the StatementText