Example usage for java.util Iterator Iterator

Introduction

In this page you can find the example usage for java.util Iterator Iterator.

Prototype

Iterator

Source Link

Usage

From source file:org.apache.cocoon.components.expression.jxpath.JXPathExpression.java

public Iterator iterate(ExpressionContext context) throws ExpressionException {
    final JXPathContext jxpathContext = getContext(context);
    Object val = this.compiledExpression.getPointer(jxpathContext, this.expression).getNode();
    // FIXME: workaround for JXPath bug
    if (val instanceof NativeArray)
        return new JSIntrospector.NativeArrayIterator((NativeArray) val);
    else/*from   www.  j a v a2 s. c om*/
        return new Iterator() {
            Iterator iter = compiledExpression.iteratePointers(jxpathContext);

            public boolean hasNext() {
                return iter.hasNext();
            }

            public Object next() {
                return ((Pointer) iter.next()).getNode();
            }

            public void remove() {
                iter.remove();
            }
        };
}

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From source file:org.apache.hadoop.hbase.util.PairOfSameType.java

@Override
public Iterator<T> iterator() {
    return new Iterator<T>() {
        private int returned = 0;

        @Override/*from w  w w .  j  ava  2  s .co m*/
        public boolean hasNext() {
            return this.returned < 2;
        }

        @Override
        public T next() {
            if (++this.returned == 1)
                return getFirst();
            else if (this.returned == 2)
                return getSecond();
            else
                throw new IllegalAccessError("this.returned=" + this.returned);
        }

        @Override
        public void remove() {
            throw new NotImplementedException();
        }
    };
}

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From source file:com.indeed.lsmtree.core.TestImmutableBTreeIndex.java

public int[] createTree() throws IOException, InstantiationException, IllegalAccessException {
    Random r = new Random(0);
    final int[] ints = new int[treeSize];
    int previous = 0;
    for (int i = 0; i < ints.length; i++) {
        ints[i] = previous + r.nextInt(10) + 1;
        previous = ints[i];//w  w w .ja va2  s .co m
    }
    Iterator<Generation.Entry<Integer, Long>> iterator = new Iterator<Generation.Entry<Integer, Long>>() {

        int index = 0;

        @Override
        public boolean hasNext() {
            return index < ints.length;
        }

        @Override
        public Generation.Entry<Integer, Long> next() {
            int ret = ints[index];
            index++;
            return Generation.Entry.create(ret, (long) ret);
        }

        @Override
        public void remove() {
            throw new UnsupportedOperationException();
        }
    };
    ImmutableBTreeIndex.Writer.write(tmpDir, iterator, new IntSerializer(), new LongSerializer(), 65536, false);
    return ints;
}

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From source file:org.apache.cocoon.el.impl.jxpath.JXPathExpression.java

public Iterator iterate(ObjectModel objectModel) throws ExpressionException {
    final JXPathContext jxpathContext = getContext(objectModel);
    Object val = this.compiledExpression.getPointer(jxpathContext, this.expression).getNode();
    // FIXME: workaround for JXPath bug
    if (val instanceof NativeArray)
        return new JSIntrospector.NativeArrayIterator((NativeArray) val);
    else// w ww  .  j ava  2  s . c  o  m
        return new Iterator() {
            Iterator iter = compiledExpression.iteratePointers(jxpathContext);

            public boolean hasNext() {
                return iter.hasNext();
            }

            public Object next() {
                return ((Pointer) iter.next()).getNode();
            }

            public void remove() {
                iter.remove();
            }
        };
}

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From source file:org.hippoecm.frontend.plugins.reporting.ReportModel.java

@Override
public Iterator iterator(long first, long count) {
    load();// ww w.j ava 2s  .  c  o m
    if (resultSet != null) {
        try {
            final NodeIterator nodeIterator = resultSet.getNodes();
            return new Iterator<IModel>() {
                public boolean hasNext() {
                    return nodeIterator.hasNext();
                }

                public IModel next() {
                    return new JcrNodeModel(nodeIterator.nextNode());
                }

                public void remove() {
                    throw new UnsupportedOperationException();
                }
            };
        } catch (RepositoryException ex) {
            log.error("Failed to obtain nodes from query result");
        }
    }
    return new ArrayList(0).iterator();
}

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From source file:act.installer.UniprotInstaller.java

public static void main(String[] args)
        throws IOException, SAXException, ParserConfigurationException, CompoundNotFoundException {
    Options opts = new Options();
    for (Option.Builder b : OPTION_BUILDERS) {
        opts.addOption(b.build());/*from   www  .ja  va  2  s .  c  om*/
    }

    CommandLine cl = null;
    try {
        CommandLineParser parser = new DefaultParser();
        cl = parser.parse(opts, args);
    } catch (ParseException e) {
        LOGGER.error("Argument parsing failed: %s", e.getMessage());
        HELP_FORMATTER.printHelp(UniprotInstaller.class.getCanonicalName(), HELP_MESSAGE, opts, null, true);
        System.exit(1);
    }

    if (cl.hasOption("help")) {
        HELP_FORMATTER.printHelp(UniprotInstaller.class.getCanonicalName(), HELP_MESSAGE, opts, null, true);
        System.exit(1);
    }

    File uniprotFile = new File(cl.getOptionValue(OPTION_UNIPROT_PATH));
    String dbName = cl.getOptionValue(OPTION_DB_NAME);

    if (!uniprotFile.exists()) {
        String msg = String.format("Uniprot file path is null");
        LOGGER.error(msg);
        throw new RuntimeException(msg);
    } else {
        MongoDB db = new MongoDB("localhost", 27017, dbName);

        DBIterator iter = db.getDbIteratorOverOrgs();

        Iterator<Organism> orgIterator = new Iterator<Organism>() {
            @Override
            public boolean hasNext() {
                boolean hasNext = iter.hasNext();
                if (!hasNext)
                    iter.close();
                return hasNext;
            }

            @Override
            public Organism next() {
                DBObject o = iter.next();
                return db.convertDBObjectToOrg(o);
            }

        };

        OrgMinimalPrefixGenerator prefixGenerator = new OrgMinimalPrefixGenerator(orgIterator);
        Map<String, String> minimalPrefixMapping = prefixGenerator.getMinimalPrefixMapping();

        UniprotInstaller installer = new UniprotInstaller(uniprotFile, db, minimalPrefixMapping);
        installer.init();
    }
}

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From source file:com.addthis.bundle.core.list.ListBundle.java

@Override
public Iterator<BundleField> iterator() {
    return new Iterator<BundleField>() {
        private final Iterator<BundleField> iter = format.iterator();
        private BundleField peek = null;
        private BundleField prev = null;

        @Override/*w w  w  .jav  a2 s  .  c  o m*/
        public boolean hasNext() {
            while (peek == null && iter.hasNext()) {
                BundleField next = iter.next();
                ValueObject value = getRawValue(next);
                if (value == SKIP) {
                    continue;
                }
                peek = next;
                break;
            }
            return peek != null;
        }

        @Override
        public BundleField next() {
            if (hasNext()) {
                BundleField next = peek;
                prev = next;
                peek = null;
                return next;
            }
            throw new NoSuchElementException();
        }

        @Override
        public void remove() {
            checkState(prev != null, "Next has not yet been called or remove already has");
            removeValue(prev);
            prev = null;
        }
    };
}

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From source file:Main.java

public static Iterable<Node> eval(Node element, String path) throws XPathExpressionException {
    XPathFactory factory = XPathFactory.newInstance();
    XPath xpath = factory.newXPath();
    // xpath.setNamespaceContext(new NamespaceContext() {
    ////from w  ww .jav  a 2s  . co m
    // /**
    // * @WARNING this code will work only if the namespace is present at
    // * each node of the xml dom and within the xpath queries.
    // * Otherwise you can fix like that:
    // *
    // * <pre>
    // * // FIXME: this is a
    // * hack!! if ("atom".equals(prefix)) return
    // * "http://www.w3.org/2005/Atom"; but it wont work with
    // * </pre>
    // *
    // * different namespaces
    // * @see
    // javax.xml.namespace.NamespaceContext#getNamespaceURI(java.lang.String)
    // */
    // public String getNamespaceURI(String prefix) {
    // String namespace = DOMUtil.lookupNamespaceURI(node, prefix);
    // return namespace;
    // }
    //
    // public String getPrefix(String namespaceURI) {
    // String prefix = node.lookupPrefix(namespaceURI);
    // return prefix;
    // }
    //
    // public Iterator<?> getPrefixes(final String namespaceURI) {
    // return new Iterator<String>() {
    // String ns = getPrefix(namespaceURI);
    //
    // public boolean hasNext() {
    // return ns != null;
    // }
    //
    // public String next() {
    // String r = ns;
    // ns = null;
    // return r;
    // }
    //
    // public void remove() {
    // }
    //
    // };
    // }
    // });
    XPathExpression expr = xpath.compile(path);
    final NodeList result = (NodeList) expr.evaluate(element, XPathConstants.NODESET);
    return new Iterable<Node>() {
        public Iterator<Node> iterator() {
            return new Iterator<Node>() {
                int len = result.getLength();

                int pos;

                public boolean hasNext() {
                    return pos < len;
                }

                public Node next() {
                    if (pos >= len) {
                        return null;
                    }
                    return result.item(pos++);
                }

                public void remove() {
                    throw new IllegalAccessError();
                }

            };
        }
    };
}

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From source file:de.icongmbh.oss.maven.plugin.javassist.ClassnameExtractor.java

/**
 * Wrapping the iterator (as reference) of class file names and extract full qualified class name
 * on//  w w  w  .  jav  a 2 s  . c o  m
 * {@link Iterator#next()}.
 * <p>
 * It is possible that {@link Iterator#hasNext()} returns {@code true} and {@link Iterator#next()}
 * returns {@code null}.
 * </p>
 *
 * @param parentDirectory to remove from {@code classFile} and maybe {@code null}.
 * @param classFileIterator to extract the names from. Must not be {@code null}.
 * @return iterator of full qualified class names based on passed classFiles or {@code null}
 * @see #extractClassNameFromFile(File, File)
 */
// DANGEROUS call by reference
public static Iterator<String> iterateClassnames(final File parentDirectory,
        final Iterator<File> classFileIterator) {
    return new Iterator<String>() {

        @Override
        public boolean hasNext() {
            return classFileIterator == null ? false : classFileIterator.hasNext();
        }

        @Override
        public String next() {
            final File classFile = classFileIterator.next();
            try {
                // possible returns null
                return extractClassNameFromFile(parentDirectory, classFile);
            } catch (final IOException e) {
                throw new RuntimeException(e.getMessage());
            }
        }

        @Override
        public void remove() {
            classFileIterator.remove();
        }
    };
}

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From source file:de.escalon.hypermedia.spring.uber.AbstractUberNode.java

/**
 * Allows iterating over children of this uber node which have a data attribute.
 */// w w  w  .j  ava  2 s .co m
@Override
public Iterator<UberNode> iterator() {

    return new Iterator<UberNode>() {

        int index = 0;

        @Override
        public void remove() {
            throw new UnsupportedOperationException("removing from uber node is not supported");
        }

        @Override
        public UberNode next() {
            index = findNextChildWithData();
            return data.get(index++);
        }

        @Override
        public boolean hasNext() {
            return findNextChildWithData() != -1;
        }

        private int findNextChildWithData() {
            for (int i = index; i < data.size(); i++) {
                if (!data.get(i).getData().isEmpty()) {
                    return i;
                }
            }
            return -1;
        }

    };
}

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