70 lines
2.4 KiB
Java
70 lines
2.4 KiB
Java
package fr.pandacube.lib.db;
|
|
|
|
import fr.pandacube.lib.util.Log;
|
|
|
|
/**
|
|
*
|
|
* @author Marc
|
|
*
|
|
* @param <F> the table class of this current foreign key field
|
|
* @param <T> the Java type of this field
|
|
* @param <P> the table class of the targeted primary key
|
|
*/
|
|
public class SQLFKField<F extends SQLElement<F>, T, P extends SQLElement<P>> extends SQLField<F, T> {
|
|
|
|
private SQLField<P, T> sqlPrimaryKeyField;
|
|
private Class<P> sqlForeignKeyElemClass;
|
|
|
|
protected SQLFKField(SQLType<T> t, boolean nul, T deflt, Class<P> fkEl, SQLField<P, T> fkF) {
|
|
super(t, nul, deflt);
|
|
construct(fkEl, fkF);
|
|
}
|
|
|
|
/* package */ static <E extends SQLElement<E>, F extends SQLElement<F>> SQLFKField<E, Integer, F> idFK(boolean nul, Class<F> fkEl) {
|
|
return idFK(nul, null, fkEl);
|
|
}
|
|
|
|
/* package */ static <E extends SQLElement<E>, F extends SQLElement<F>> SQLFKField<E, Integer, F> idFK(boolean nul, Integer deflt, Class<F> fkEl) {
|
|
if (fkEl == null) throw new IllegalArgumentException("foreignKeyElement can't be null");
|
|
try {
|
|
SQLField<F, Integer> f = DB.getSQLIdField(fkEl);
|
|
return new SQLFKField<>(f.type, nul, deflt, fkEl, f);
|
|
} catch (DBInitTableException e) {
|
|
Log.severe("Can't create Foreign key Field targetting id field of '"+fkEl+"'", e);
|
|
return null;
|
|
}
|
|
}
|
|
|
|
/* package */ static <E extends SQLElement<E>, T, F extends SQLElement<F>> SQLFKField<E, T, F> customFK(boolean nul, Class<F> fkEl, SQLField<F, T> fkF) {
|
|
return customFK(nul, null, fkEl, fkF);
|
|
}
|
|
|
|
/* package */ static <E extends SQLElement<E>, T, F extends SQLElement<F>> SQLFKField<E, T, F> customFK(boolean nul, T deflt, Class<F> fkEl, SQLField<F, T> fkF) {
|
|
if (fkEl == null) throw new IllegalArgumentException("foreignKeyElement can't be null");
|
|
return new SQLFKField<>(fkF.type, nul, deflt, fkEl, fkF);
|
|
}
|
|
|
|
private void construct(Class<P> fkEl, SQLField<P, T> fkF) {
|
|
if (fkF == null) throw new IllegalArgumentException("foreignKeyField can't be null");
|
|
try {
|
|
DB.initTable(fkEl);
|
|
} catch (DBInitTableException e) {
|
|
throw new RuntimeException(e);
|
|
}
|
|
|
|
if (fkF.getSQLElementType() == null)
|
|
throw new RuntimeException("Can't initialize foreign key. The primary key in the table " + fkEl.getName() + " is not properly initialized and can't be targetted by a forein key");
|
|
sqlPrimaryKeyField = fkF;
|
|
sqlForeignKeyElemClass = fkEl;
|
|
}
|
|
|
|
public SQLField<P, T> getPrimaryField() {
|
|
return sqlPrimaryKeyField;
|
|
}
|
|
|
|
public Class<P> getForeignElementClass() {
|
|
return sqlForeignKeyElemClass;
|
|
}
|
|
|
|
}
|