com.metamatrix.query.sql.lang
Class SubquerySetCriteria

java.lang.Object
  com.metamatrix.query.sql.lang.Criteria
      com.metamatrix.query.sql.lang.PredicateCriteria
          com.metamatrix.query.sql.lang.AbstractSetCriteria
              com.metamatrix.query.sql.lang.SubquerySetCriteria

All Implemented Interfaces:

SubqueryContainer, LanguageObject, ContextReference, java.io.Serializable, java.lang.Cloneable

public class SubquerySetCriteria
extends AbstractSetCriteria
implements SubqueryContainer, ContextReference

A criteria which is true is the expression's value is a member in a list of values returned from a subquery. This criteria can be represented as " IN (SELECT ...)".

See Also:

Serialized Form

Constructor Summary

SubquerySetCriteria()
Constructor for SubquerySetCriteria.

SubquerySetCriteria(Expression expression, Command subCommand)

Method Summary

void	acceptVisitor(LanguageVisitor visitor) Method for accepting a visitor.
java.lang.Object	clone() Deep copy of object.
boolean	equals(java.lang.Object obj) Override equals() method.
Command	getCommand() Get the subquery command used to produce the values for this SetCriteria.
java.lang.String	getContextSymbol()
Expression	getValueExpression()
int	hashCode() Get hash code.
void	setCommand(Command command) Set the subquery command (either a SELECT or a procedure execution).

Methods inherited from class com.metamatrix.query.sql.lang.AbstractSetCriteria

getExpression, isNegated, setExpression, setNegated

Methods inherited from class com.metamatrix.query.sql.lang.Criteria

combineCriteria, combineCriteria, combineCriteria, separateCriteriaByAnd, toConjunctiveNormalForm, toDisjunctiveNormalForm, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

SubquerySetCriteria

public SubquerySetCriteria()

Constructor for SubquerySetCriteria.

SubquerySetCriteria

public SubquerySetCriteria(Expression expression,
                           Command subCommand)

Method Detail

getContextSymbol

public java.lang.String getContextSymbol()

Specified by:

getContextSymbol in interface ContextReference

getValueExpression

public Expression getValueExpression()

Specified by:

getValueExpression in interface ContextReference

setCommand

public void setCommand(Command command)

Set the subquery command (either a SELECT or a procedure execution).

Specified by:

setCommand in interface SubqueryContainer

Parameters:

command - Command to execute to get the values for the criteria

getCommand

public Command getCommand()

Get the subquery command used to produce the values for this SetCriteria.

Specified by:

getCommand in interface SubqueryContainer

Returns:

Command Command to execute

acceptVisitor

public void acceptVisitor(LanguageVisitor visitor)

Description copied from interface: LanguageObject

Method for accepting a visitor. It is the responsibility of the language object to call back on the visitor.

Specified by:

acceptVisitor in interface LanguageObject

Parameters:

visitor - Visitor being used

hashCode

public int hashCode()

Get hash code. WARNING: The hash code is based on data in the criteria. If data values are changed, the hash code will change - don't hash this object and change values.

Overrides:

hashCode in class java.lang.Object

Returns:

Hash code

equals

public boolean equals(java.lang.Object obj)

Override equals() method.

Overrides:

equals in class java.lang.Object

Parameters:

obj - Other object

Returns:

True if equal

clone

public java.lang.Object clone()

Deep copy of object. The values Iterator of this object will not be cloned - it will be null in the new object (see #setValueIterator setValueIterator}).

Specified by:

clone in interface LanguageObject

Specified by:

clone in class AbstractSetCriteria

Returns:

Deep copy of object