de.mguennewig.pobjects.metadata
Class PrimaryKeyConstraint

java.lang.Object
  de.mguennewig.pobjects.metadata.Constraint
      de.mguennewig.pobjects.metadata.UniqueConstraint
          de.mguennewig.pobjects.metadata.PrimaryKeyConstraint

public class PrimaryKeyConstraint
extends UniqueConstraint

A primary key constraint is a UniqueConstraint which also forbids null values.

Author:

Michael Günnewig

Field Summary

Fields inherited from class de.mguennewig.pobjects.metadata.Constraint

MEMBER_NAME

Constructor Summary

PrimaryKeyConstraint(java.lang.String schemaName, Field[] fields)
Creates a new primary-key constraint.

PrimaryKeyConstraint(java.lang.String schemaName, IdField idfield)
Creates the implicit primary-key constraint for the id field.

Method Summary

void	check(Record obj) Checks whether the constraint is fulfilled for the given Record.
java.lang.String	name(ClassDecl cl, int variant) Returns different names depending on variant for the code generator.

Methods inherited from class de.mguennewig.pobjects.metadata.UniqueConstraint

getApplyFunction, getField, getFields, getImplicitIndex, getNumFields

Methods inherited from class de.mguennewig.pobjects.metadata.Constraint

getSchemaName, isImplicit

Methods inherited from class java.lang.Object

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

Constructor Detail

PrimaryKeyConstraint

public PrimaryKeyConstraint(java.lang.String schemaName,
                            Field[] fields)

Creates a new primary-key constraint.

Parameters:

schemaName - The constraint name within the database schema.

fields - The fields belonging to this constraint.

PrimaryKeyConstraint

public PrimaryKeyConstraint(java.lang.String schemaName,
                            IdField idfield)

Creates the implicit primary-key constraint for the id field.

Method Detail

check

public void check(Record obj)
           throws PObjConstraintException

Checks whether the constraint is fulfilled for the given Record.

As we can't check for uniqueness we only check whether each field is NOT NULL.

Overrides:

check in class UniqueConstraint

Throws:

PObjConstraintException - when the constraint isn't fulfilled.

name

public java.lang.String name(ClassDecl cl,
                             int variant)

Returns different names depending on variant for the code generator.

Overrides:

name in class UniqueConstraint

Returns:

variant	return value
Constraint.MEMBER_NAME	pk<TableName><Fields>