com.samskivert.jdbc.depot.operator
Class Conditionals.IsNull

java.lang.Object
  com.samskivert.jdbc.depot.operator.Conditionals.IsNull

All Implemented Interfaces:

SQLExpression, SQLOperator

Enclosing class:

Conditionals

public static class Conditionals.IsNull
extends Object
implements SQLOperator

The SQL 'is null' operator.

Nested Class Summary

Nested classes/interfaces inherited from interface com.samskivert.jdbc.depot.operator.SQLOperator

SQLOperator.BinaryOperator, SQLOperator.MultiOperator

Field Summary

protected ColumnExp

_column

Constructor Summary

Conditionals.IsNull(Class<? extends PersistentRecord> pClass, String pColumn)

Conditionals.IsNull(ColumnExp column)

Conditionals.IsNull(String pColumn)

Method Summary

void	accept(ExpressionVisitor builder) Most uses of this class have been implemented with a visitor pattern.
void	addClasses(Collection<Class<? extends PersistentRecord>> classSet) Adds all persistent classes that are brought into the SQL context by this clause: FROM clauses, JOINs, UPDATEs, anything that could create a new table abbreviation.
ColumnExp	getColumn()

Methods inherited from class java.lang.Object

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

Field Detail

_column

protected ColumnExp _column

Constructor Detail

Conditionals.IsNull

public Conditionals.IsNull(String pColumn)

Conditionals.IsNull

public Conditionals.IsNull(Class<? extends PersistentRecord> pClass,
                           String pColumn)

Conditionals.IsNull

public Conditionals.IsNull(ColumnExp column)

Method Detail

getColumn

public ColumnExp getColumn()

accept

public void accept(ExpressionVisitor builder)
            throws Exception

Description copied from interface: SQLExpression

Most uses of this class have been implemented with a visitor pattern. Create your own ExpressionVisitor and call this method with it.

Specified by:

accept in interface SQLExpression

Throws:

Exception

See Also:

SQLBuilder

addClasses

public void addClasses(Collection<Class<? extends PersistentRecord>> classSet)

Description copied from interface: SQLExpression

Adds all persistent classes that are brought into the SQL context by this clause: FROM clauses, JOINs, UPDATEs, anything that could create a new table abbreviation. This method should recurse into any subordinate state that may in turn bring in new classes so that sub-queries work correctly.

Specified by:

addClasses in interface SQLExpression