src/edu/mit/csail/sdg/squander/engine/Heap.java

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package edu.mit.csail.sdg.squander.engine;

import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.List;

import edu.mit.csail.sdg.squander.serializer.AbstractHeap;


public class Heap extends AbstractHeap {

    private final LinkedHashMap<Integer, Object> heapObjects;

    public Heap(Object[] objects) {
        heapObjects = new LinkedHashMap<Integer, Object>();
        for (Object obj : objects) 
            if (obj != null) 
                addObject(obj);
    }

    public void addObjects(Iterable<Object> objects) {
        for (Object obj : objects)
            if (obj != null) 
                addObject(obj);
    }
    
    public void addObject(Object obj) {
        if (obj == null)
            return;
        if (obj instanceof String)
            heapObjects.put(obj.hashCode(), obj);
        else
            heapObjects.put(System.identityHashCode(obj), obj);
    }
    
    @Override
    protected List<Object> getHeapObjects() {
        return Collections.unmodifiableList(new ArrayList<Object>(heapObjects.values()));
    }
}

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