org.jpox.store.expression
Class BooleanLiteral

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

All Implemented Interfaces:

Literal

Direct Known Subclasses:

BooleanBitColumnLiteral, BooleanCharColumnLiteral

public class BooleanLiteral
extends BooleanExpression
implements Literal

Representation of a Boolean literal in a Query.

Version:

$Revision: 1.5 $

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

BooleanLiteral(QueryExpression qs, JavaTypeMapping mapping, boolean value)
Creates a boolean literal

Method Summary

BooleanExpression	and(ScalarExpression expr) Conditional And.
BooleanExpression	eor(ScalarExpression expr) Exclusive OR
BooleanExpression	eq(ScalarExpression expr) Equality operator (equals to)
protected java.lang.String	getBooleanFalseValue() Return the String value for FALSE in the database.
protected java.lang.String	getBooleanTrueValue() Return the String value for TRUE in the database.
java.lang.Object	getValue() Accessor to the literal value
BooleanExpression	ior(ScalarExpression expr) Conditional OR.
BooleanExpression	not() Logical complement
BooleanExpression	noteq(ScalarExpression expr) Equality operator (not equals to)

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

in, 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, toStatementText, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

BooleanLiteral

public BooleanLiteral(QueryExpression qs,
                      JavaTypeMapping mapping,
                      boolean value)

Creates a boolean literal

Parameters:

qs - the QueryExpression

mapping - the mapping

value - the binary value

Method Detail

getValue

public java.lang.Object getValue()

Description copied from interface: Literal

Accessor to the literal value

Specified by:

getValue in interface Literal

Returns:

the value of the literal

getBooleanTrueValue

protected java.lang.String getBooleanTrueValue()

Return the String value for TRUE in the database. This should be overriden by subclasses for special cases of booleans.

Returns:

The String value for TRUE in the database.

getBooleanFalseValue

protected java.lang.String getBooleanFalseValue()

Return the String value for FALSE in the database. This should be overriden by subclasses for special cases of booleans.

Returns:

The String value for FALSE in the database.

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 BooleanExpression

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 BooleanExpression

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 BooleanExpression

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 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