com.metamatrix.query.sql.lang
Class FromClause

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

All Implemented Interfaces:

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

Direct Known Subclasses:

JoinPredicate, SubqueryFromClause, UnaryFromClause

public abstract class FromClause
extends java.lang.Object
implements LanguageObject

A FromClause is an interface for subparts held in a FROM clause. One type of FromClause is UnaryFromClause, which is the more common use and represents a single group. Another, less common type of FromClause is the JoinPredicate which represents a join between two FromClauses and may contain criteria.

See Also:

Serialized Form

Constructor Summary

FromClause()

Method Summary

abstract void	acceptVisitor(LanguageVisitor visitor) Method for accepting a visitor.
abstract java.lang.Object	clone() Implement clone to make objects cloneable.
abstract void	collectGroups(java.util.Collection groups)
boolean	equals(java.lang.Object obj)
boolean	hasHint()
boolean	isMakeDep()
boolean	isMakeNotDep()
boolean	isOptional()
void	setMakeDep(boolean makeDep)
void	setMakeNotDep(boolean makeNotDep)
void	setOptional(boolean optional)

Methods inherited from class java.lang.Object

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

Constructor Detail

FromClause

public FromClause()

Method Detail

isOptional

public boolean isOptional()

setOptional

public void setOptional(boolean optional)

acceptVisitor

public abstract 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

collectGroups

public abstract void collectGroups(java.util.Collection groups)

clone

public abstract java.lang.Object clone()

Description copied from interface: LanguageObject

Implement clone to make objects cloneable.

Specified by:

clone in interface LanguageObject

Overrides:

clone in class java.lang.Object

Returns:

Deep clone of this object

isMakeDep

public boolean isMakeDep()

setMakeDep

public void setMakeDep(boolean makeDep)

isMakeNotDep

public boolean isMakeNotDep()

setMakeNotDep

public void setMakeNotDep(boolean makeNotDep)

hasHint

public boolean hasHint()

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object