org.datanucleus.store.rdbms.sql.expression

Class StringSubqueryExpression

java.lang.Object

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

org.datanucleus.store.rdbms.sql.expression.StringExpression

org.datanucleus.store.rdbms.sql.expression.StringSubqueryExpression

All Implemented Interfaces:

SubqueryExpressionComponent

public class StringSubqueryExpression
extends StringExpression
implements SubqueryExpressionComponent

String expression to wrap a subquery. The subquery SQLStatement should return a String value.

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
StringSubqueryExpression(SQLStatement stmt, SQLStatement subStmt)

Method Summary

Modifier and Type	Method and Description
BooleanExpression	eq(SQLExpression expr) Equality operator (equals to)
BooleanExpression	ge(SQLExpression expr) Relational operator (greater than or equals)
SQLStatement	getSubqueryStatement() Accessor for the subquery.
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)
void	setKeyword(String keyword)

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

add, in

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

and, cast, com, distinct, div, encloseInParentheses, eor, getJavaTypeMapping, getLowestOperator, getNumberOfSubExpressions, getParameterName, getSQLStatement, getSQLTable, getSubExpression, ior, is, isParameter, mod, mul, neg, not, setJavaTypeMapping, sub, toSQLText

Methods inherited from class java.lang.Object

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

Constructor Detail

StringSubqueryExpression

public StringSubqueryExpression(SQLStatement stmt,
                                SQLStatement subStmt)

Method Detail

getSubqueryStatement

public SQLStatement getSubqueryStatement()

Description copied from interface: SubqueryExpressionComponent

Accessor for the subquery.

Specified by:

getSubqueryStatement in interface SubqueryExpressionComponent

Returns:

The subquery statement

setKeyword

public void setKeyword(String keyword)

eq

public BooleanExpression eq(SQLExpression expr)

Description copied from class: SQLExpression

Equality operator (equals to)

Overrides:

eq in class StringExpression

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 StringExpression

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 StringExpression

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 StringExpression

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 StringExpression

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 StringExpression

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 StringExpression

Parameters:

methodName - name of the method to invoke

args - Args to this method (if any)

Returns:

the converted value