Examples of org.apache.commons.collections4.MultiMap

org.apache.commons.collections4.FunctorException
Defines a map that holds a collection of values against each key.
A MultiMap is a Map with slightly different semantics. Putting a value into the map will add the value to a Collection at that key. Getting a value will return a Collection, holding all the values put to that key.
For example:
```
 MultiMap mhm = new MultiValueMap(); mhm.put(key, "A"); mhm.put(key, "B"); mhm.put(key, "C"); Collection coll = (Collection) mhm.get(key);
```
coll will be a collection containing "A", "B", "C".
NOTE: Additional methods were added to this interface in Commons Collections 3.1. These were added solely for documentation purposes and do not change the interface as they were defined in the superinterface Map anyway. @since 2.0 @version $Id: MultiMap.java 1477779 2013-04-30 18:55:24Z tn $

     * map.
     *
     * @return the map to be tested
     */
    public MultiMap makeFullMap() {
        MultiMap m = makeEmptyMap();
        addSampleMappings(m);
        return m;
    }

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    /**
     * Test to ensure that makeEmptyMap and makeFull returns a new non-null
     * map with each invocation.
     */
    public void testMakeMap() {
        MultiMap em = makeEmptyMap();
        assertTrue("failure in test: makeEmptyMap must return a non-null map.", em != null);


        MultiMap em2 = makeEmptyMap();
        assertTrue("failure in test: makeEmptyMap must return a non-null map.", em != null);


        assertTrue("failure in test: makeEmptyMap must return a new map " + "with each invocation.", em != em2);


        MultiMap fm = makeFullMap();
        assertTrue("failure in test: makeFullMap must return a non-null map.", fm != null);


        MultiMap fm2 = makeFullMap();
        assertTrue("failure in test: makeFullMap must return a non-null map.", fm != null);


        assertTrue("failure in test: makeFullMap must return a new map " + "with each invocation.", fm != fm2);
    }

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     * Tests Map.putAll(map)
     */
    public void testMapPutAll() {
        if (!isPutAddSupported()) {
            if (!isPutChangeSupported()) {
                MultiMap temp = makeFullMap();
                resetEmpty();
                try {
                    map.putAll(temp);
                    fail("Expected UnsupportedOperationException on putAll");
                } catch (UnsupportedOperationException ex) {
                }
            }
            return;
        }


        resetEmpty();


        MultiMap m2 = makeFullMap();


        map.putAll(m2);
        confirmed.putAll(m2);
        verify();


        resetEmpty();


        m2 = makeConfirmedMap();
        Object[] keys = getSampleKeys();
        Object[] values = getSampleValues();
        for (int i = 0; i < keys.length; i++) {
            m2.put(keys[i], values[i]);
        }


        map.putAll(m2);
        confirmed.putAll(m2);
        verify();

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     * @return an array of Map.Entry of those keys to those values
     */
    private Map.Entry[] makeEntryArray(Object[] keys, Object[] values) {
        Map.Entry[] result = new Map.Entry[keys.length];
        for (int i = 0; i < keys.length; i++) {
            MultiMap map = makeConfirmedMap();
            map.put(keys[i], values[i]);
            result[i] = (Map.Entry) map.entrySet().iterator().next();
        }
        return result;
    }

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  }


  //loads the files and removes words which occur less than 5 tims
  public void loadProgram() throws FileNotFoundException
  {
    Bag wordBag = new HashBag();


    //Load all the medical files in the directory
    File[] fileList = new File(recordsDir).listFiles();
    for (int i = 0; i<fileList.length; i++) {
      loadFile(fileList[i].toString(), wordBag);
    }


    //dump bag into frequent who appear in 5 or more medical records
    for (Object obj : wordBag.uniqueSet()) {
      if (wordBag.getCount(obj) > 4){
        frequent.add((String)obj);
      }
    }


  }

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     * @param object  the input object
     * @return never
     * @throws FunctorException always
     */
    public boolean evaluate(final T object) {
        throw new FunctorException("ExceptionPredicate invoked");
    }

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     *
     * @return never
     * @throws FunctorException always
     */
    public T create() {
        throw new FunctorException("ExceptionFactory invoked");
    }

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        public T create() {
            try {
                return clazz.newInstance();
            } catch (final Exception ex) {
                throw new FunctorException("Cannot instantiate class: " + clazz, ex);
            }
        }

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        try {
            final Class<?> cls = input.getClass();
            final Method method = cls.getMethod(iMethodName, iParamTypes);
            return (O) method.invoke(input, iArgs);
        } catch (final NoSuchMethodException ex) {
            throw new FunctorException("InvokerTransformer: The method '" + iMethodName + "' on '" +
                                       input.getClass() + "' does not exist");
        } catch (final IllegalAccessException ex) {
            throw new FunctorException("InvokerTransformer: The method '" + iMethodName + "' on '" +
                                       input.getClass() + "' cannot be accessed");
        } catch (final InvocationTargetException ex) {
            throw new FunctorException("InvokerTransformer: The method '" + iMethodName + "' on '" +
                                       input.getClass() + "' threw an exception", ex);
        }
    }

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     * @param input  the input object to transform
     * @return never
     * @throws FunctorException always
     */
    public O transform(final I input) {
        throw new FunctorException("ExceptionTransformer invoked");
    }

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