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

    /**
     * {@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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      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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    private void initIfNeeded() {
        if ( baseIterator == null ) {
            FilterIterator filtering = new FilterIterator(iterator);
            filtering.setPredicate(predicate == null? TruePredicate.INSTANCE: predicate);
            baseIterator = new TransformIterator(filtering);
            baseIterator.setTransformer(transformer==null? NOPTransformer.INSTANCE:transformer);
        }
    }

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        super((T)first, objects);
    }
    @Override
    protected void setIterator(Object iterator) {
        Iterator<?> iter = extractIterator(iterator);
        TransformIterator transformIterator = new TransformIterator(iter, ReferenceTransformer.INSTANCE);
        super.setIterator(new FilterIterator(transformIterator, NotNullKeyValuePredicate.INSTANCE));
    }

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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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                stale = true;


                NodeId id = getId();
                Path path = id.getPath();


                Iterator propertyIds = new TransformIterator(new FilterIterator(itemInfos.iterator(),
                        new Predicate() {
                            public boolean evaluate(Object object) {
                                return object instanceof PropertyInfo;
                            }
                        }),
                        new Transformer() {
                            public Object transform(Object input) {
                                PropertyInfo info = (PropertyInfo) input;
                                return info.getId();
                            }});


                Iterator childInfos = new TransformIterator(itemInfos.iterator(), new Transformer(){
                    public Object transform(Object input) {
                        ItemInfo info = (ItemInfo) input;
                        Name name = info.getPath().getNameElement().getName();
                        return new ChildInfoImpl(name, null, Path.INDEX_DEFAULT);
                    }});

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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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      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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