de.mguennewig.pobjects.metadata
Class MapType

java.lang.Object
  de.mguennewig.pobjects.metadata.JoinType
      de.mguennewig.pobjects.metadata.MapType

All Implemented Interfaces:

ReferenceToClass

public class MapType
extends JoinType

Rows of the target table represent a map of values associated with the parent table.

Author:

Michael Günnewig

Field Summary

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

CLASS_NAME, TYPE_NAME

Constructor Summary

MapType(java.lang.String targetModule, java.lang.String targetName, ClassDecl targetClass)
Initialize map data.

Method Summary

java.lang.String	name(int variant) Returns different names depending on variant for the code generator.
void	setTargetClass(ClassDecl targetClass) Sets the class declaration of the referenced table.

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

getTargetClass, getTargetModule, getTargetName, setTypeClass

Methods inherited from class java.lang.Object

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

Constructor Detail

MapType

public MapType(java.lang.String targetModule,
               java.lang.String targetName,
               ClassDecl targetClass)

Initialize map data.

Parameters:

targetModule - Module of the target class.

targetName - The name of the class the join refers to.

targetClass - The class declaration of the referenced table. This must be given or null with a later call to setTargetClass(ClassDecl) before any usage of this type.

See Also:

setTargetClass(ClassDecl)

Method Detail

setTargetClass

public void setTargetClass(ClassDecl targetClass)

Sets the class declaration of the referenced table.

A call to this method is only necessary if the class declaration has not been passed to the constructor to solve circle problems.

The referenced table must fulfill a couple of requirements depending on join type. The following requirements are common for all:

• requires a primary key declaration (no id field)
• the first primary key column must refer to the parent class and be defined as `on delete cascade'
• the referenced table must have more columns then just the parent reference

In addition to the generic restrictions a map type adds the following constraint:

• the referenced table must contain at least one column additionally to those that are part of the primary key, which will be the value column(s)

Specified by:

setTargetClass in interface ReferenceToClass

Overrides:

setTargetClass in class JoinType

name

public java.lang.String name(int variant)

Returns different names depending on variant for the code generator.

Overrides:

name in class JoinType