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## org.apache.cayenne.map
Class DeleteRule

    java.lang.Object
      org.apache.cayenne.map.DeleteRule

    public class DeleteRule

extends Object

Defines constants for the possible values of ObjRelationship delete rules.

Field Summary
`static int` | `CASCADE` Delete the destination object(s)
`static int` | `DEFAULT_DELETE_RULE_TO_MANY` Default delete rule for one-to-many relationships.
`static int` | `DEFAULT_DELETE_RULE_TO_ONE` Default delete rule for many-to-one relationships.
`static int` | `DENY` If the relationship has any objects (toOne or toMany), deny the delete.
`static int` | `NO_ACTION`
`static int` | `NULLIFY` Remove the reference that the destination has to this source (if the inverse relationship is toOne, nullify, if toMany, remove the source object)

Constructor Summary
`DeleteRule()`

Method Summary
`static int` | `deleteRuleForName(String name)` Translates a possible delete rule name (typically returned from deleteRuleName at some stage), into a deleteRule constant
`static String` | `deleteRuleName(int deleteRule)` Returns String label for a delete rule state.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### NO_ACTION

    public static final int NO_ACTION

See Also:
  Constant Field Values

### NULLIFY

    public static final int NULLIFY

  Remove the reference that the destination has to this source (if the inverse relationship is toOne, nullify, if toMany, remove the source object)

  See Also:
    Constant Field Values

### CASCADE

    public static final int CASCADE

  Delete the destination object(s)

  See Also:
    Constant Field Values

### DENY

    public static final int DENY

  If the relationship has any objects (toOne or toMany), deny the delete. (Destination objects would therefore have to be deleted manually first)

  See Also:
    Constant Field Values

### DEFAULT_DELETE_RULE_TO_MANY

    public static final int DEFAULT_DELETE_RULE_TO_MANY

  Default delete rule for one-to-many relationships. It is used when new rels are created via modeler, or when synchrozining Obj- and DbEntities

  See Also:
    Constant Field Values

### DEFAULT_DELETE_RULE_TO_ONE

    public static final int DEFAULT_DELETE_RULE_TO_ONE

  Default delete rule for many-to-one relationships. It is used when new rels are created via modeler, or when synchrozining Obj- and DbEntities

  See Also:
    Constant Field Values

Constructor Detail

### DeleteRule

    public DeleteRule()

Method Detail

### deleteRuleName

    public static String deleteRuleName(int deleteRule)

  Returns String label for a delete rule state. Used for save/load (xml), display in modeler etc. Must remain the same, or else great care taken with loading old maps.

### deleteRuleForName

    public static int deleteRuleForName(String name)

  Translates a possible delete rule name (typically returned from deleteRuleName at some stage), into a deleteRule constant

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