Foreign Key

public class ForeignKey
implements Serializable

Foreign Key describes a foreign key dependency between two relations from the common schema

(sourceRelation[sourceAttriutes] REFERENCES targetRealtion[targetKey])

private long id;
private Relation sourceRelation;
private Relation targetRelation;
private java.util.ArrayList<Integer> sourceAttributes;
private boolean virtual;
private boolean enforced;

public ForeignKey()

Default constructor

public ForeignKey (Relation sourceRelation, 
                   Relation targetRelation,
		   java.util.ArrayList<Integer> sourceAttributes)

Constructor that store also values inside the class attributes.

Called by:

• it.unibz.inf.magik.web.SessionControl
• it.unibz.inf.magik.db.DatabaseConnector
• it.unibz.inf.magik.test.CycleDetectionTest
• it.unibz.inf.magik.test.TestFK
• it.unibz.inf.magik.test.TestFK2
• it.unibz.inf.magik.test.TestHardCaseFDCandFK
• it.unibz.inf.magik.test.TestQueryGeneralization
• it.unibz.inf.magik.test.TCQCReasonerFKandFD
• it.unibz.inf.magik.test.TCQCReasonerTCSuggestions
• it.unibz.inf.magik.test.TestQueryClass

Parameters:

• sourceRelation - source relation
• targetRelation - target relation
• sourceAttributes - source attributes (position)

public java.lang.String printHTML()

This method is used for create a compact view of a foreign key (table[field] → table2[field])

Returns:

• foreign key adapted to the compact view

public Relation getSourceRelation() 
public void setSourceRelation(Relation sourceRelation) 
 
public Relation getTargetRelation() 
public void setTargetRelation(Relation targetRelation) 
 
public java.util.ArrayList<Integer> getSourceAttributes() 
public void setSourceAttributes(java.util.ArrayList<Integer> sourceAttributes) 
 
public long getId() 
public void setId(long id) 
 
public boolean isVirtual()
public void setVirtual(boolean virtual) 
 
public boolean isEnforced() 
public void setEnforced(boolean enforced) 
 
public Integer getTargetKey()

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