org.datanucleus.store.rdbms.sql.expression

Class ByteExpression

java.lang.Object

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

org.datanucleus.store.rdbms.sql.expression.NumericExpression

org.datanucleus.store.rdbms.sql.expression.ByteExpression

public class ByteExpression
extends NumericExpression

Representation of a Byte expression 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

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

Constructor Summary

Constructors

Constructor and Description
ByteExpression(org.datanucleus.query.expression.Expression.MonadicOperator op, SQLExpression expr1) Perform an operation
ByteExpression(SQLExpression expr1, org.datanucleus.query.expression.Expression.DyadicOperator op, SQLExpression expr2) Perform an operation
ByteExpression(SQLStatement stmt, SQLTable table, JavaTypeMapping mapping) Constructor for an SQL expression for a (field) mapping in a specified table.

Method Summary

Methods

Modifier and Type	Method and Description
BooleanExpression	eq(SQLExpression expr) Equality operator (equals to)
BooleanExpression	ge(SQLExpression expr) Relational operator (greater than or equals)
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)
BooleanExpression	ne(SQLExpression expr) Not equality operator (not equals to)

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

add, com, div, in, mod, mul, neg, sub

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, setJavaTypeMapping, toSQLText

Methods inherited from class java.lang.Object

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

Constructor Detail

ByteExpression

public ByteExpression(SQLStatement stmt,
              SQLTable table,
              JavaTypeMapping mapping)

Constructor for an SQL expression for a (field) mapping in a specified table.

Parameters:

stmt - The statement

table - The table in the statement

mapping - The mapping for the field

ByteExpression

public ByteExpression(org.datanucleus.query.expression.Expression.MonadicOperator op,
              SQLExpression expr1)

Perform an operation

op

on expression

expr1

.

Parameters:

op - operator

expr1 - operand

ByteExpression

public ByteExpression(SQLExpression expr1,
              org.datanucleus.query.expression.Expression.DyadicOperator op,
              SQLExpression expr2)

Perform an operation

op

between

expr1

and

expr2

.

Parameters:

expr1 - the first expression

op - the operator between operands

expr2 - the second expression

Method Detail

eq

public BooleanExpression eq(SQLExpression expr)

Description copied from class: SQLExpression

Equality operator (equals to)

Overrides:

eq in class NumericExpression

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 NumericExpression

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 NumericExpression

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 NumericExpression

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 NumericExpression

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 NumericExpression

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.

invoke

public SQLExpression invoke(String methodName,
                   List args)

Description copied from class: SQLExpression

Invocation of a method on this expression.

Overrides:

invoke in class SQLExpression

Parameters:

methodName - name of the method to invoke

args - Args to this method (if any)

Returns:

the converted value