com.metamatrix.query.sql.lang
Class UnaryFromClause

java.lang.Object
  com.metamatrix.query.sql.lang.FromClause
      com.metamatrix.query.sql.lang.UnaryFromClause

All Implemented Interfaces:

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

public class UnaryFromClause
extends FromClause

A FROM subpart that represents a single group. For example, the FROM clause: "FROM a, b" will have two UnaryFromClause objects, each holding a reference to a GroupSymbol (for a and b).

See Also:

Serialized Form

Constructor Summary

UnaryFromClause()
Construct default object

UnaryFromClause(GroupSymbol group)
Construct object with specified group

Method Summary

void	acceptVisitor(LanguageVisitor visitor) Method for accepting a visitor.
java.lang.Object	clone() Get deep clone of object
void	collectGroups(java.util.Collection groups) Collect all GroupSymbols for this from clause.
boolean	equals(java.lang.Object obj) Check whether objects are equal
Command	getExpandedCommand()
GroupSymbol	getGroup() Get group held by clause
int	hashCode() Get hash code of object
void	setExpandedCommand(Command expandedCommand)
void	setGroup(GroupSymbol group) Set the group held by the clause
java.lang.String	toString() Returns a string representation of an instance of this class.

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

hasHint, isMakeDep, isMakeNotDep, isOptional, setMakeDep, setMakeNotDep, setOptional

Methods inherited from class java.lang.Object

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

Constructor Detail

UnaryFromClause

public UnaryFromClause()

Construct default object

UnaryFromClause

public UnaryFromClause(GroupSymbol group)

Construct object with specified group

Parameters:

group - Group being held

Method Detail

setGroup

public void setGroup(GroupSymbol group)

Set the group held by the clause

Parameters:

group - Group to hold

getGroup

public GroupSymbol getGroup()

Get group held by clause

Returns:

Group held by clause

collectGroups

public void collectGroups(java.util.Collection groups)

Collect all GroupSymbols for this from clause.

Specified by:

collectGroups in class FromClause

Parameters:

groups - Groups to add to

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

Specified by:

acceptVisitor in class FromClause

Parameters:

visitor - Visitor being used

equals

public boolean equals(java.lang.Object obj)

Check whether objects are equal

Overrides:

equals in class FromClause

Parameters:

obj - Other object

Returns:

True if equal

hashCode

public int hashCode()

Get hash code of object

Overrides:

hashCode in class java.lang.Object

Returns:

Hash code

clone

public java.lang.Object clone()

Get deep clone of object

Specified by:

clone in interface LanguageObject

Specified by:

clone in class FromClause

Returns:

Deep copy of the object

toString

public java.lang.String toString()

Returns a string representation of an instance of this class.

Overrides:

toString in class java.lang.Object

Returns:

String representation of object

getExpandedCommand

public Command getExpandedCommand()

Returns:

Returns the expandedCommand.

setExpandedCommand

public void setExpandedCommand(Command expandedCommand)

Parameters:

expandedCommand - The expandedCommand to set.