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

   {
      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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        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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            public Object transform(Object input) {
                return ((DataDomain) input).getName();
            }
        };
        return new TransformIterator(config.getDomains().iterator(), tr);
    }

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            public Object transform(Object input) {
                return ((DataMap) input).getName();
            }
        };
        return new TransformIterator(maps.iterator(), tr);
    }

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                String name2 = (o1 != null) ? ((DataNode) o2).getName() : null;
                return Util.nullSafeCompare(true, name1, name2);
            }
        });
        
        return new TransformIterator(nodes.iterator(), tr);
    }

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                return ((DataMap) input).getName();
            }
        };


        Collection maps = findNode(domainName, nodeName).getDataMaps();
        return new TransformIterator(maps.iterator(), tr);
    }

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     */
    @SuppressWarnings("unchecked")
    public static <T, R, S extends T> Iterator<R> transformIterator(Iterator<? extends T> iterator,
            final Transformer<S, ? super R> transformer) {


        return new TransformIterator(iterator, new org.apache.commons.collections.Transformer() {
            public Object transform(Object input) {
                return transformer.transform((S) input);
            }
        });
    }

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            public Object transform(Object input) {
                return ((DataDomain) input).getName();
            }
        };
        return new TransformIterator(config.getDomains().iterator(), tr);
    }

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            public Object transform(Object input) {
                return ((DataMap) input).getName();
            }
        };
        return new TransformIterator(maps.iterator(), tr);
    }

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