Examples of org.apache.commons.collections.MapIterator

org.apache.commons.collections.MapIterator
Defines an iterator that operates over a Map.
This iterator is a special version designed for maps. It can be more efficient to use this rather than an entry set iterator where the option is available, and it is certainly more convenient.
A map that provides this interface may not hold the data internally using Map Entry objects, thus this interface can avoid lots of object creation.
In use, this iterator iterates through the keys in the map. After each call to next(), the getValue() method provides direct access to the value. The value can also be set using setValue().
```
 MapIterator it = map.mapIterator(); while (it.hasNext()) { Object key = it.next(); Object value = it.getValue(); it.setValue(newValue); } 
```
@since Commons Collections 3.0 @version $Revision: 1.7 $ $Date: 2004/02/18 01:15:42 $ @author Stephen Colebourne

     * @param key2  the second key
     * @return true if any elements were removed
     */
    public boolean removeAll(Object key1, Object key2) {
        boolean modified = false;
        MapIterator it = mapIterator();
        while (it.hasNext()) {
            MultiKey multi = (MultiKey) it.next();
            if (multi.size() >= 2 &&
                (key1 == null ? multi.getKey(0) == null : key1.equals(multi.getKey(0))) &&
                (key2 == null ? multi.getKey(1) == null : key2.equals(multi.getKey(1)))) {
                it.remove();
                modified = true;
            }
        }
        return modified;
    }

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     * @param key3  the third key
     * @return true if any elements were removed
     */
    public boolean removeAll(Object key1, Object key2, Object key3) {
        boolean modified = false;
        MapIterator it = mapIterator();
        while (it.hasNext()) {
            MultiKey multi = (MultiKey) it.next();
            if (multi.size() >= 3 &&
                (key1 == null ? multi.getKey(0) == null : key1.equals(multi.getKey(0))) &&
                (key2 == null ? multi.getKey(1) == null : key2.equals(multi.getKey(1))) &&
                (key3 == null ? multi.getKey(2) == null : key3.equals(multi.getKey(2)))) {
                it.remove();
                modified = true;
            }
        }
        return modified;
    }

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     * @param key4  the fourth key
     * @return true if any elements were removed
     */
    public boolean removeAll(Object key1, Object key2, Object key3, Object key4) {
        boolean modified = false;
        MapIterator it = mapIterator();
        while (it.hasNext()) {
            MultiKey multi = (MultiKey) it.next();
            if (multi.size() >= 4 &&
                (key1 == null ? multi.getKey(0) == null : key1.equals(multi.getKey(0))) &&
                (key2 == null ? multi.getKey(1) == null : key2.equals(multi.getKey(1))) &&
                (key3 == null ? multi.getKey(2) == null : key3.equals(multi.getKey(2))) &&
                (key4 == null ? multi.getKey(3) == null : key4.equals(multi.getKey(3)))) {
                it.remove();
                modified = true;
            }
        }
        return modified;
    }

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        }
        Map map = (Map) obj;
        if (map.size() != size()) {
            return false;
        }
        MapIterator it = mapIterator();
        try {
            while (it.hasNext()) {
                Object key = it.next();
                Object value = it.getValue();
                if (value == null) {
                    if (map.get(key) != null || map.containsKey(key) == false) {
                        return false;
                    }
                } else {

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            return "{}";
        }
        StringBuffer buf = new StringBuffer(32 * size());
        buf.append('{');


        MapIterator it = mapIterator();
        boolean hasNext = it.hasNext();
        while (hasNext) {
            Object key = it.next();
            Object value = it.getValue();
            buf.append(key == this ? "(this Map)" : key)
               .append('=')
               .append(value == this ? "(this Map)" : value);


            hasNext = it.hasNext();
            if (hasNext) {
                buf.append(',').append(' ');
            }
        }

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    public Object removeValue(Object value) {
        throw new UnsupportedOperationException();
    }


    public MapIterator mapIterator() {
        MapIterator it = getBidiMap().mapIterator();
        return UnmodifiableMapIterator.decorate(it);
    }

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            throw new ArrayStoreException();
        }
        if (a.length < size()) {
            a = new ChildNodeEntry[size()];
        }
        MapIterator iter = entries.mapIterator();
        int i = 0;
        while (iter.hasNext()) {
            iter.next();
            a[i] = entries.getValue(i);
            i++;
        }
        while (i < a.length) {
            a[i++] = null;

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        map = (Map) in.readObject();
    }


    //-----------------------------------------------------------------------
    public MapIterator mapIterator() {
        MapIterator it = getOrderedMap().mapIterator();
        return UnmodifiableMapIterator.decorate(it);
    }

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   */
  public static int[] events() {
    int[] events = new int[EVENTS.size()];
    int i = 0;


    MapIterator it = EVENTS.mapIterator();
    while (it.hasNext()) {
      it.next();
      Integer value = (Integer) it.getValue();
      events[i++] = value.intValue();
    }


    return events;
  }

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   * Lists by type should probably just be cached in static variables.
   * @param collection - collection to fill
   * @param clazz - array of class types
   */
  public void populateListWithFieldsOfType(List list, Class[] clazz) {
    MapIterator i = map.mapIterator();
    while (i.hasNext()) {
      Object key = i.next();
      Field field = (Field) i.getValue();
      if (field.isApplicable(clazz))
        list.add(field);
     }
    Collections.sort(list);
  }

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