org.datanucleus.store.rdbms.sql.expression

Class CharacterLiteral

java.lang.Object

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

org.datanucleus.store.rdbms.sql.expression.CharacterExpression

org.datanucleus.store.rdbms.sql.expression.CharacterLiteral

All Implemented Interfaces:

SQLLiteral

public class CharacterLiteral
extends CharacterExpression
implements SQLLiteral

Representation of a Character 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 and Description
CharacterLiteral(SQLStatement stmt, JavaTypeMapping mapping, Object value, String parameterName) Constructor for a character literal with a value.

Method Summary

Modifier and Type	Method and Description
SQLExpression	add(SQLExpression expr) Additive Operator.
SQLExpression	com() Bitwise Complement Operator
BooleanExpression	eq(SQLExpression expr) Equality operator (equals to)
BooleanExpression	ge(SQLExpression expr) Relational operator (greater than or equals)
Object	getValue() Accessor to the literal value
BooleanExpression	gt(SQLExpression expr) Relational operator (greater than)
SQLExpression	invoke(String methodName, List args) Invocation of a method on this expression.
BooleanExpression	le(SQLExpression expr) Relational operator (lower than or equals)
BooleanExpression	lt(SQLExpression expr) Relational operator (lower than)
SQLExpression	mod(SQLExpression expr) Method to return a modulus expression.
BooleanExpression	ne(SQLExpression expr) Not equality operator (not equals to)
SQLExpression	neg() Unary Minus Operator
void	setJavaTypeMapping(JavaTypeMapping m)
void	setNotParameter() Method to set this literal as not being a parameter.
protected void	setStatement()
SQLExpression	sub(SQLExpression expr) Additive Operator.

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

div, in, mul

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

and, cast, distinct, encloseInParentheses, eor, getJavaTypeMapping, getLowestOperator, getNumberOfSubExpressions, getParameterName, getSQLStatement, getSQLTable, getSubExpression, ior, is, isParameter, not, toSQLText

Methods inherited from class java.lang.Object

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

Constructor Detail

CharacterLiteral

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

Constructor for a character literal with a value.

Parameters:

stmt - the SQL statement

mapping - the mapping

value - the value

parameterName - Name of the parameter represented if any (JDBC "?")

Method Detail

eq

public BooleanExpression eq(SQLExpression expr)

Description copied from class: SQLExpression

Equality operator (equals to)

Overrides:

eq in class CharacterExpression

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 CharacterExpression

Parameters:

expr - the right-hand operand

Returns:

The type of an equality expression is a boolean

lt

public BooleanExpression lt(SQLExpression expr)

Description copied from class: SQLExpression

Relational operator (lower than)

Overrides:

lt in class CharacterExpression

Parameters:

expr - the right-hand operand

Returns:

true if the value of the left-hand operand is less than the value of the right-hand operand, and otherwise is false.

le

public BooleanExpression le(SQLExpression expr)

Description copied from class: SQLExpression

Relational operator (lower than or equals)

Overrides:

le in class CharacterExpression

Parameters:

expr - the right-hand operand

Returns:

true if the value of the left-hand operand is less than or equal to the value of the right-hand operand, and otherwise is false.

gt

public BooleanExpression gt(SQLExpression expr)

Description copied from class: SQLExpression

Relational operator (greater than)

Overrides:

gt in class CharacterExpression

Parameters:

expr - the right-hand operand

Returns:

true if the value of the left-hand operand is greater than the value of the right-hand operand, and otherwise is false.

ge

public BooleanExpression ge(SQLExpression expr)

Description copied from class: SQLExpression

Relational operator (greater than or equals)

Overrides:

ge in class CharacterExpression

Parameters:

expr - the right-hand operand

Returns:

true if the value of the left-hand operand is greater than or equal the value of the right-hand operand, and otherwise is false.

add

public SQLExpression add(SQLExpression expr)

Description copied from class: SQLExpression

Additive Operator. The binary + operator performs addition when applied to two operands of numeric type, producing the sum of the operands. If the type of either operand of a + operator is String, then the operation is string concatenation.

Overrides:

add in class CharacterExpression

Parameters:

expr - the right-hand operand

Returns:

If one of the operands is String, the returned value is the string concatenation; The sum of two operands of numeric type. The left-hand operand is the minuend and the right-hand operand is the subtrahend;

sub

public SQLExpression sub(SQLExpression expr)

Description copied from class: SQLExpression

Additive Operator. The binary - operator subtracts right-hand operand from left-hand operand.

Overrides:

sub in class CharacterExpression

Parameters:

expr - the right-hand operand

Returns:

The binary - operator performs subtraction when applied to two operands of numeric type producing the difference of its operands; the left-hand operand is the minuend and the right-hand operand is the subtrahend.

mod

public SQLExpression mod(SQLExpression expr)

Description copied from class: CharacterExpression

Method to return a modulus expression.

Overrides:

mod in class CharacterExpression

Parameters:

expr - The expression to modulus against

Returns:

The modulus expression

neg

public SQLExpression neg()

Description copied from class: SQLExpression

Unary Minus Operator

Overrides:

neg in class CharacterExpression

Returns:

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

com

public SQLExpression com()

Description copied from class: SQLExpression

Bitwise Complement Operator

Overrides:

com in class CharacterExpression

Returns:

the type of the unary bitwise complement expression is the promoted type of the operand.

invoke

public SQLExpression invoke(String methodName,
                            List args)

Description copied from class: SQLExpression

Invocation of a method on this expression.

Overrides:

invoke in class CharacterExpression

Parameters:

methodName - name of the method to invoke

args - Args to this method (if any)

Returns:

the converted value

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

setJavaTypeMapping

public void setJavaTypeMapping(JavaTypeMapping m)

Overrides:

setJavaTypeMapping in class SQLExpression

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()