Class MappingOpUnion

java.lang.Object

se.liu.ida.hefquin.mappings.algebra.ops.MappingOpUnion

All Implemented Interfaces:

MappingOperator

public class MappingOpUnion
extends Object
implements MappingOperator

Field Summary

Fields

Modifier and Type	Field	Description
protected static final MappingOpUnion	instance

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	MappingOpUnion()

Method Summary

Modifier and Type	Method	Description
int	getExpectedNumberOfSubExpressions()	Returns the number of sub-expressions that a mapping expression is expected to have if it has this operator as its root operator.
static MappingOpUnion	getInstance()
String	toString()
void	visit(MappingOperatorVisitor visitor)

Methods inherited from class java.lang.Object

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

Field Details

instance

protected static final MappingOpUnion instance

Constructor Details

MappingOpUnion

protected MappingOpUnion()

Method Details

getInstance

public static MappingOpUnion getInstance()

getExpectedNumberOfSubExpressions

public int getExpectedNumberOfSubExpressions()

Description copied from interface: MappingOperator

Returns the number of sub-expressions that a mapping expression is expected to have if it has this operator as its root operator. Hence, for nullary operators, this method returns 0; for unary operators, it returns 1; for binary operators, it returns 2. For n-ary operators (which can be applied to an arbitrary number of sub-expressions), this method returns Integer.MAX_VALUE.

Specified by:

getExpectedNumberOfSubExpressions in interface MappingOperator

visit

public void visit(MappingOperatorVisitor visitor)

Specified by:

visit in interface MappingOperator

toString

public String toString()

Overrides:

toString in class Object