public ForeignKey(Table table, String name, Column[] columns, UniqueKey key, boolean cascade) {
super(table, name, columns);
if (key == null) {
throw new IllegalArgumentException("Unique key cannot be null.");
}
m_key = key;
m_cascade = cascade;
Column[] fk = getColumns();
Column[] uk = m_key.getColumns();
if (fk.length != uk.length) {
throw new IllegalArgumentException(
"Foreign columns don't match unique key: fk = " + getSQL() + " uk = " + key.getSQL());
}
for (int i = 0; i < fk.length; i++) {
if (fk[i].getType() == Integer.MIN_VALUE) {
fk[i].setType(uk[i].getType());
fk[i].setSize(uk[i].getSize());
} else {
if (fk[i].getType() != uk[i].getType() && fk[i].getSize() != uk[i].getSize()) {
throw new IllegalArgumentException("Foreign columns don't match unique key.");
}
}
}
m_key.addForeignKey(this);
}
