Joy of Patterns: Using Patterns for Enterprise Development, The

PartList.java

package ProductConfig;
import java.util.*;
public class PartList
{
public PartList()
{
    m_partList = new Hashtable();
}

public Part getPart(String name)
{
    return (Part)(m_partList.get(name));
}

public void addPart(Part part)
{
    m_partList.put(part.getName(),part);
}
public void removePart(Part part)
{
    m_partList.remove(part.getName());
}

private Hashtable m_partList;
}