Package org.datanucleus.store.rdbms.sql.expression

Class BooleanLiteral

java.lang.Object

org.datanucleus.store.rdbms.sql.expression.SQLExpression

org.datanucleus.store.rdbms.sql.expression.BooleanExpression

org.datanucleus.store.rdbms.sql.expression.BooleanLiteral

All Implemented Interfaces:

SQLLiteral

public class BooleanLiteral
extends BooleanExpression
implements SQLLiteral

Representation of a Boolean literal in a Query.

Nested Class Summary

Nested classes/interfaces inherited from class org.datanucleus.store.rdbms.sql.expression.SQLExpression

SQLExpression.ColumnExpressionList

Field Summary

Fields inherited from class org.datanucleus.store.rdbms.sql.expression.SQLExpression

lowestOperator, mapping, parameterName, st, stmt, subExprs, table

Constructor Summary

Constructors

Constructor	Description
BooleanLiteral(SQLStatement stmt, JavaTypeMapping mapping, Boolean value)	Creates a boolean literal with the specified value, using the provided mapping.
BooleanLiteral(SQLStatement stmt, JavaTypeMapping mapping, Object value, String parameterName)	Creates a boolean literal with the specified value, using the provided mapping.

Method Summary

Modifier and Type	Method	Description
BooleanExpression	and(SQLExpression expr)	Conditional AND.
BooleanExpression	eor(SQLExpression expr)	Exclusive OR
BooleanExpression	eq(SQLExpression expr)	Equality operator (equals to)
Object	getValue()	Accessor to the literal value
BooleanExpression	ior(SQLExpression expr)	Conditional OR.
BooleanExpression	ne(SQLExpression expr)	Not equality operator (not equals to)
BooleanExpression	not()	Logical complement
void	setJavaTypeMapping(JavaTypeMapping mapping)
void	setNotParameter()	Method to set this literal as not being a parameter.
protected void	setStatement()

Methods inherited from class org.datanucleus.store.rdbms.sql.expression.BooleanExpression

hasClosure, in, invoke, neg

Methods inherited from class org.datanucleus.store.rdbms.sql.expression.SQLExpression

add, bitAnd, bitOr, cast, com, distinct, div, encloseInParentheses, ge, getJavaTypeMapping, getLowestOperator, getNumberOfSubExpressions, getParameterName, getSQLStatement, getSQLTable, getSubExpression, gt, is, isParameter, le, lt, mod, mul, sub, toSQLText, unDistinct

Methods inherited from class java.lang.Object

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

Constructor Detail

BooleanLiteral

public BooleanLiteral(SQLStatement stmt,
                      JavaTypeMapping mapping,
                      Object value,
                      String parameterName)

Creates a boolean literal with the specified value, using the provided mapping. The boolean literal DOESN'T have closure using this constructor. This constructor will use the provided mapping in determining whether to put "TRUE"/"1=0", or "1"/"0" or "Y"/"N" in the SQL.

Parameters:

stmt - The SQL statement

mapping - the mapping

value - the value

parameterName - Parameter name (represented as JDBC "?")

BooleanLiteral

public BooleanLiteral(SQLStatement stmt,
                      JavaTypeMapping mapping,
                      Boolean value)

Creates a boolean literal with the specified value, using the provided mapping. The boolean expression has closure using this constructor. This constructor doesn't take into account the type of the mapping and how a boolean may be stored, just creating a literal (TRUE) and the SQL will simply be "TRUE"/"1=0".

Parameters:

stmt - The SQL statement

mapping - the mapping

value - the boolean value

Method Detail

setJavaTypeMapping

public void setJavaTypeMapping(JavaTypeMapping mapping)

Overrides:

setJavaTypeMapping in class SQLExpression

getValue

public Object getValue()

Description copied from interface: SQLLiteral

Accessor to the literal value

Specified by:

getValue in interface SQLLiteral

Returns:

the value of the literal

and

public BooleanExpression and(SQLExpression expr)

Description copied from class: SQLExpression

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(SQLExpression expr)

Description copied from class: SQLExpression

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(SQLExpression expr)

Description copied from class: SQLExpression

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: SQLExpression

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(SQLExpression expr)

Description copied from class: SQLExpression

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

ne

public BooleanExpression ne(SQLExpression expr)

Description copied from class: SQLExpression

Not equality operator (not equals to)

Overrides:

ne in class BooleanExpression

Parameters:

expr - the right-hand operand

Returns:

The type of an equality expression is a boolean

setNotParameter

public void setNotParameter()

Description copied from interface: SQLLiteral

Method to set this literal as not being a parameter. If the literal if not currently a parameter then does nothing. Updates any underlying SQL to have the value.

Specified by:

setNotParameter in interface SQLLiteral

setStatement

protected void setStatement()