oracle.jdeveloper.cm.ds.db
Class PKConstraint
java.lang.Object
oracle.jdeveloper.cm.ds.db.AbstractDBObject
oracle.jdeveloper.cm.ds.db.Constraint
oracle.jdeveloper.cm.ds.db.ColumnConstraint
oracle.jdeveloper.cm.ds.db.UniqueConstraint
oracle.jdeveloper.cm.ds.db.PKConstraint
- All Implemented Interfaces:
- Copyable, DBObject, Subject
- public class PKConstraint
- extends UniqueConstraint
A PKConstraint
represents a Primary Key constraint. A Primary Key combines a NOT NULL constraint and a unique constraint in a single declaration. That is, it prohibits multiple rows from having the same value in the same column or combination of columns and prohibits values from being null.
Fields inherited from class oracle.jdeveloper.cm.ds.db.Constraint |
TYPE |
Fields inherited from interface oracle.jdeveloper.cm.ds.db.DBObject |
COMMENT |
Constructor Summary |
PKConstraint()
Constructs a new PKConstraint. |
PKConstraint(java.lang.String name, Relation relation)
Constructs a new PKConstraint on the specified Relation with the specified name. |
Method Summary |
java.lang.Object |
copyTo(java.lang.Object target)
Copies the state of this DBObject to another instance. |
boolean |
equals(java.lang.Object target)
|
java.lang.String |
getConstraintType()
Retrieves the type of constraint represented by this instance. |
Methods inherited from class oracle.jdeveloper.cm.ds.db.AbstractDBObject |
attach, compareToImpl, copyToImpl, detach, equalsImpl, getID, getName, getProperties, getProperty, hashCode, notifyObservers, setID, setName, setProperties, setProperty, toString |
Methods inherited from class java.lang.Object |
clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
CONSTRAINT_TYPE
public static final java.lang.String CONSTRAINT_TYPE
-
- See Also:
- Constant Field Values
PKConstraint
public PKConstraint()
- Constructs a new PKConstraint.
PKConstraint
public PKConstraint(java.lang.String name,
Relation relation)
- Constructs a new PKConstraint on the specified Relation with the specified name.
- Parameters:
relation
- the relation on which this constraint acts
copyTo
public java.lang.Object copyTo(java.lang.Object target)
- Description copied from interface:
DBObject
- Copies the state of this DBObject to another instance. If
null
is specified for the target, a new instance will be created.
The entire state of the object will be copied, with a few exceptions. In particular, any observers registered will NOT be copied. In cases where this instance contains child DBObjects, new instances of those children will be created, and the state copied to them. The copy will thus contain its own unique state; after making the copy, changing one instance will not cause any changes to occur to the copy. The properties will be copied; however, copies will not be made of the values referenced by the properties - thus, the copy will refer to the same instance as the original. Child objects that are copied will still point to the original parent; it is the responsibility of a copied parent to update the parent of copies of its children point to the copy of itself.
The ID associated with this object will not be copied. If the copy is intended to be a temporary copy of this object (to be used in a dialog editing the object for example), then the caller should explicitly set the ID of the copy to be the same as on this object. However, if the new object is intended to exist separately from this object, the caller should ensure that the new object have a different ID from this object.
-
- Specified by:
copyTo
in interface DBObject
- Overrides:
copyTo
in class UniqueConstraint
equals
public boolean equals(java.lang.Object target)
-
- Overrides:
equals
in class UniqueConstraint
getConstraintType
public java.lang.String getConstraintType()
- Description copied from class:
Constraint
- Retrieves the type of constraint represented by this instance. Valid constraint types can vary depending on the database. Examples of constraint types include primary key constraints, foreign key constraints, and check constraints.
-
- Overrides:
getConstraintType
in class UniqueConstraint
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