51 lines
1.2 KiB
Java
51 lines
1.2 KiB
Java
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//: patterns/dynatrash/DynaTrash.java
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// Using a HashMap of ArrayLists and RTTI
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// to automatically sort trash into
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// vectors. This solution, despite the
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// use of RTTI, is extensible.
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package patterns.dynatrash;
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import patterns.trash.*;
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import java.util.*;
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// Generic TypeMap works in any situation:
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class TypeMap {
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private HashMap t = new HashMap();
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public void add(Object o) {
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Class type = o.getClass();
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if(t.containsKey(type))
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((ArrayList)t.get(type)).add(o);
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else {
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ArrayList v = new ArrayList();
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v.add(o);
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t.put(type,v);
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}
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}
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public ArrayList get(Class type) {
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return (ArrayList)t.get(type);
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}
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public Iterator keys() {
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return t.keySet().iterator();
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}
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}
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// Adapter class to allow
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// callbacks from ParseTrash.fillBin():
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class TypeMapAdapter implements Fillable {
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TypeMap map;
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public TypeMapAdapter(TypeMap tm) { map = tm; }
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@Override
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public void addTrash(Trash t) { map.add(t); }
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}
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public class DynaTrash {
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public static void main(String[] args) {
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TypeMap bin = new TypeMap();
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ParseTrash.fillBin("Trash.dat",
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new TypeMapAdapter(bin));
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Iterator keys = bin.keys();
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while(keys.hasNext())
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Trash.sumValue(
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bin.get((Class)keys.next()));
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}
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} ///:~
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