Examples of org.apache.commons.collections.iterators.TransformIterator

Package org.apache.commons.collections.iterators

Examples of org.apache.commons.collections.iterators.TransformIterator

org.apache.commons.collections.iterators.TransformIterator
Decorates an iterator such that each element returned is transformed. @since Commons Collections 1.0 @version $Revision: 1.9 $ $Date: 2004/02/18 00:59:50 $ @author James Strachan @author Stephen Colebourne

            public boolean isEmptySet() {
                return authors.length == 0;
            }


            public Iterator iterator() {
                return new TransformIterator(Arrays.asList(authors).iterator(), new Transformer() {
                    @Override
                    public Object transform(final Object inAuthor) {
                        return new ChangeLogSet.Entry() {
                            @Override
                            public String getMsg() {

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      checkOpen();
      final Map<String, NodeData> aggregateRoots = new HashMap<String, NodeData>();
      final Set<String> removedNodeIds = new HashSet<String>();
      final Set<String> addedNodeIds = new HashSet<String>();


      index.update(IteratorUtils.toList(new TransformIterator(remove, new Transformer()
      {
         public Object transform(Object input)
         {
            String uuid = ((String)input);
            removedNodeIds.add(uuid);
            return uuid;
         }
      })), IteratorUtils.toList(new TransformIterator(add, new Transformer()
      {
         public Object transform(Object input)
         {
            NodeData state = (NodeData)input;
            if (state == null)

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   {
      final Map<String, NodeData> aggregateRoots = new HashMap<String, NodeData>();
      final Set<String> removedNodeIds = new HashSet<String>();
      final Set<String> addedNodeIds = new HashSet<String>();


      Collection<String> docIdsToRemove = IteratorUtils.toList(new TransformIterator(remove, new Transformer()
      {
         public Object transform(Object input)
         {
            String uuid = ((String)input);
            removedNodeIds.add(uuid);
            return uuid;
         }
      }));
      Collection<Document> docsToAdd = IteratorUtils.toList(new TransformIterator(add, new Transformer()
      {
         public Object transform(Object input)
         {
            NodeData state = (NodeData)input;
            if (state == null)

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   {
      final Map<String, NodeData> aggregateRoots = new HashMap<String, NodeData>();
      final Set<String> removedNodeIds = new HashSet<String>();
      final Set<String> addedNodeIds = new HashSet<String>();


      Collection<String> docIdsToRemove = IteratorUtils.toList(new TransformIterator(remove, new Transformer()
      {
         public Object transform(Object input)
         {
            String uuid = ((String)input);
            removedNodeIds.add(uuid);
            return uuid;
         }
      }));
      Collection<Document> docsToAdd = IteratorUtils.toList(new TransformIterator(add, new Transformer()
      {
         public Object transform(Object input)
         {
            NodeData state = (NodeData)input;
            if (state == null)

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        public T apply(S s);
    }


    @SuppressWarnings("unchecked")
    private static <S, T> Iterator<T> map(Iterator<S> source, final Function<S, T> f) {
        return new TransformIterator(source, new Transformer() {
            public Object transform(Object o) {
                return f.apply((S) o);
            }
        });
    }

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        return parent.getProperty(getParentKey(key));
    }


    public Iterator getKeys(String prefix)
    {
        return new TransformIterator(parent.getKeys(getParentKey(prefix)), new Transformer()
        {
            public Object transform(Object obj)
            {
                return getChildKey((String) obj);
            }

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        });
    }


    public Iterator getKeys()
    {
        return new TransformIterator(parent.getKeys(prefix), new Transformer()
        {
            public Object transform(Object obj)
            {
                return getChildKey((String) obj);
            }

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    /**
     * {@inheritDoc}
     */
    public Iterator getKeys(String prefix)
    {
        return new TransformIterator(parent.getKeys(getParentKey(prefix)), new Transformer()
        {
            public Object transform(Object obj)
            {
                return getChildKey((String) obj);
            }

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    /**
     * {@inheritDoc}
     */
    public Iterator getKeys()
    {
        return new TransformIterator(parent.getKeys(prefix), new Transformer()
        {
            public Object transform(Object obj)
            {
                return getChildKey((String) obj);
            }

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            throw new NullPointerException("Iterator must not be null");
        }
        if (transform == null) {
            throw new NullPointerException("Transformer must not be null");
        }
        return new TransformIterator(iterator, transform);
    }

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