Answered: Please identify two types of…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Please identify two types of antipatterns (also called code smells) in the following source code:

public abstract class AbstractCollection implements Collection {
public void addAll (AbstractCollection c) {
if (c instanceof Set) {
Set s = (Set) c;
for (int i=0; i < s.size () ; i ++) {
if (!contains (s.getElementAt (i) )) {
add (s.getElementAt(i) );
}
}
} else if (c instanceof List) {
List l = (List) c;
for ( int i=0; i < l.size() ; i++) {
if ( !contains l.get (i) )) {
add (l.get(i) );
}
}
} else if ( c instanceof Map) {
Map m = (Map) c;
for (int i=0; i<m.size () ; i++)
add (m.key[i] , m.values [i] );
}
}
}

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