com.tjeannin.provigen.model

Class Constraint

java.lang.Object

com.tjeannin.provigen.model.Constraint

public class Constraint
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	Constraint.OnConflict

Field Summary

Fields

Modifier and Type	Field and Description
String	conflictClause
static String	NOT_NULL A NOT NULL constraint may only be attached to a column definition, not specified as a table constraint.
String	targetColumn
String	type
static String	UNIQUE A UNIQUE constraint is similar to a PRIMARY KEY constraint, except that a single table may have any number of UNIQUE constraints.

Constructor Summary

Constructors

Constructor and Description
Constraint(String targetColumn, String type, String onConflict)

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

UNIQUE

public static final String UNIQUE

A UNIQUE constraint is similar to a PRIMARY KEY constraint, except that a single table may have any number of UNIQUE constraints. For each UNIQUE constraint on the table, each row must feature a unique combination of values in the columns identified by the UNIQUE constraint. As with PRIMARY KEY constraints, for the purposes of UNIQUE constraints NULL values are considered distinct from all other values (including other NULLs). If an INSERT or UPDATE statement attempts to modify the table content so that two or more rows feature identical values in a set of columns that are subject to a UNIQUE constraint, it is a constraint violation.

See Also:

Constant Field Values

NOT_NULL

public static final String NOT_NULL

A NOT NULL constraint may only be attached to a column definition, not specified as a table constraint. Not surprisingly, a NOT NULL constraint dictates that the associated column may not contain a NULL value. Attempting to set the column value to NULL when inserting a new row or updating an existing one causes a constraint violation.

See Also:

Constant Field Values

type

public String type

targetColumn

public String targetColumn

conflictClause

public String conflictClause

Constructor Detail

Constraint

public Constraint(String targetColumn,
          String type,
          String onConflict)