Example usage for java.util ListIterator hasPrevious

Introduction

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

Prototype

boolean hasPrevious();

Source Link

Document

Returns true if this list iterator has more elements when traversing the list in the reverse direction.

Usage

From source file:Main.java

public static void main(String[] args) {
    List<String> list = new ArrayList<>();
    list.add("Oracle");
    list.add("SQL");
    list.add("CSS");
    list.add("XML");
    System.out.println("List: " + list);
    // Get the list iterator
    ListIterator<String> iterator = list.listIterator();
    while (iterator.hasNext()) {
        int index = iterator.nextIndex();
        String element = iterator.next();
        System.out.println("Index=" + index + ", Element=" + element);
    }//w w  w .jav a2  s  .  c  o m
    // Reuse the iterator to iterate from the end to the beginning
    while (iterator.hasPrevious()) {
        int index = iterator.previousIndex();
        String element = iterator.previous();
        System.out.println("Index=" + index + ",  Element=" + element);
    }
}

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From source file:IteratorDemo.java

public static void main(String args[]) {
    ArrayList<String> al = new ArrayList<String>();

    al.add("C");/*  w  w  w.j  a  v a  2s  . co  m*/
    al.add("A");
    al.add("E");
    al.add("B");
    al.add("D");
    al.add("F");

    Iterator<String> itr = al.iterator();
    while (itr.hasNext()) {
        String element = itr.next();
        System.out.print(element + " ");
    }

    ListIterator<String> litr = al.listIterator();
    while (litr.hasNext()) {
        String element = litr.next();
        litr.set(element + "+");
    }

    itr = al.iterator();
    while (itr.hasNext()) {
        String element = itr.next();
        System.out.print(element + " ");
    }

    while (litr.hasPrevious()) {
        String element = litr.previous();
        System.out.print(element + " ");
    }
}

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From source file:org.deegree.tools.alkis.BackReferenceFixer.java

public static void main(String[] args) {
    Options opts = initOptions();/*from   w w w  .  ja v  a2 s . c o m*/
    FileInputStream fis = null;
    FileOutputStream fos = null;
    try {
        CommandLine line = new PosixParser().parse(opts, args);
        String input = line.getOptionValue('i');
        String output = line.getOptionValue('o');
        String schema = line.getOptionValue('s');
        fis = new FileInputStream(input);
        fos = new FileOutputStream(output);
        XMLInputFactory xifac = XMLInputFactory.newInstance();
        XMLOutputFactory xofac = XMLOutputFactory.newInstance();
        XMLStreamReader xreader = xifac.createXMLStreamReader(input, fis);
        IndentingXMLStreamWriter xwriter = new IndentingXMLStreamWriter(xofac.createXMLStreamWriter(fos));
        GMLStreamReader reader = GMLInputFactory.createGMLStreamReader(GMLVersion.GML_32, xreader);

        AppSchema appSchema = new GMLAppSchemaReader(null, null, schema).extractAppSchema();
        reader.setApplicationSchema(appSchema);

        GMLStreamWriter writer = GMLOutputFactory.createGMLStreamWriter(GMLVersion.GML_32, xwriter);
        XlinkedObjectsHandler handler = new XlinkedObjectsHandler(true, null, new GmlXlinkOptions());
        writer.setReferenceResolveStrategy(handler);

        QName prop = new QName(ns601, "dientZurDarstellungVon");

        Map<String, List<String>> refs = new HashMap<String, List<String>>();
        Map<String, List<String>> types = new HashMap<String, List<String>>();
        Map<String, String> bindings = null;

        for (Feature f : reader.readFeatureCollectionStream()) {
            if (bindings == null) {
                bindings = f.getType().getSchema().getNamespaceBindings();
            }
            for (Property p : f.getProperties(prop)) {
                FeatureReference ref = (FeatureReference) p.getValue();
                List<String> list = refs.get(ref.getId());
                if (list == null) {
                    list = new ArrayList<String>();
                    refs.put(ref.getId(), list);
                }
                list.add(f.getId());
                list = types.get(ref.getId());
                if (list == null) {
                    list = new ArrayList<String>();
                    types.put(ref.getId(), list);
                }
                list.add("inversZu_dientZurDarstellungVon_" + f.getType().getName().getLocalPart());
            }
        }

        QName[] inversePropNames = new QName[] {
                new QName(ns601, "inversZu_dientZurDarstellungVon_AP_Darstellung"),
                new QName(ns601, "inversZu_dientZurDarstellungVon_AP_LTO"),
                new QName(ns601, "inversZu_dientZurDarstellungVon_AP_PTO"),
                new QName(ns601, "inversZu_dientZurDarstellungVon_AP_FPO"),
                new QName(ns601, "inversZu_dientZurDarstellungVon_AP_KPO_3D"),
                new QName(ns601, "inversZu_dientZurDarstellungVon_AP_LPO"),
                new QName(ns601, "inversZu_dientZurDarstellungVon_AP_PPO") };

        reader.close();
        fis.close();
        writer.setNamespaceBindings(bindings);

        fis = new FileInputStream(input);
        xreader = xifac.createXMLStreamReader(input, fis);
        reader = GMLInputFactory.createGMLStreamReader(GMLVersion.GML_32, xreader);
        reader.setApplicationSchema(appSchema);

        if (bindings != null) {
            for (Map.Entry<String, String> e : bindings.entrySet()) {
                if (!e.getKey().isEmpty()) {
                    xwriter.setPrefix(e.getValue(), e.getKey());
                }
            }
        }
        xwriter.writeStartDocument();
        xwriter.setPrefix("gml", "http://www.opengis.net/gml/3.2");
        xwriter.writeStartElement("http://www.opengis.net/gml/3.2", "FeatureCollection");
        xwriter.writeNamespace("gml", "http://www.opengis.net/gml/3.2");

        GmlDocumentIdContext ctx = new GmlDocumentIdContext(GMLVersion.GML_32);

        for (Feature f : reader.readFeatureCollectionStream()) {
            if (refs.containsKey(f.getId())) {
                List<Property> props = new ArrayList<Property>(f.getProperties());
                ListIterator<Property> iter = props.listIterator();
                String name = iter.next().getName().getLocalPart();
                while (name.equals("lebenszeitintervall") || name.equals("modellart") || name.equals("anlass")
                        || name.equals("zeigtAufExternes") || name.equals("istTeilVon")
                        || name.equals("identifier")) {
                    if (iter.hasNext()) {
                        name = iter.next().getName().getLocalPart();
                    } else {
                        break;
                    }
                }
                if (iter.hasPrevious()) {
                    iter.previous();
                }
                for (QName propName : inversePropNames) {
                    Iterator<String> idIter = refs.get(f.getId()).iterator();
                    Iterator<String> typeIter = types.get(f.getId()).iterator();
                    while (idIter.hasNext()) {
                        String id = idIter.next();
                        if (typeIter.next().equals(propName.getLocalPart())) {
                            PropertyType pt = f.getType().getPropertyDeclaration(propName);
                            Property p = new GenericProperty(pt, new FeatureReference(ctx, "#" + id, null));
                            iter.add(p);
                        }
                    }
                }
                f.setProperties(props);

            }
            xwriter.writeStartElement("http://www.opengis.net/gml/3.2", "featureMember");
            writer.write(f);
            xwriter.writeEndElement();
        }

        xwriter.writeEndElement();
        xwriter.close();
    } catch (Throwable e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } finally {
        IOUtils.closeQuietly(fis);
        IOUtils.closeQuietly(fos);
    }
}

---

From source file:Main.java

/**
 * Returns the last non-null element in the given list; or, if
 * there is no non-null element, it returns null.
 *
 * @param l The list. It may be null, in which case null is
 * returned.//  w w w.  j a  v a 2  s.  c o  m
 *
 * @return The element.
 */

public static <E> E getLastNonNull(List<E> l) {
    if (l == null) {
        return null;
    }
    ListIterator<E> i = l.listIterator(l.size());
    while (i.hasPrevious()) {
        E e = i.previous();
        if (e != null) {
            return e;
        }
    }
    return null;
}

---

From source file:Main.java

/**
 * Remove all null elements at the end of the list.
 *///from   www  . ja  v a2  s .c om
public static <T> void trimTail(List<T> l) {
    final ListIterator<T> it = l.listIterator(l.size());
    while (it.hasPrevious()) {
        if (it.previous() != null)
            return;
        it.remove();
    }
}

---

From source file:Main.java

private static <T> T findPrevious(ListIterator<T> iter) {
    T prev = null;/*from w w  w .  ja  v  a  2s  .  co m*/
    iter.previous(); // rewind
    if (iter.hasPrevious()) {
        prev = iter.previous();
        iter.next(); // come back
    }
    iter.next(); // come back
    return prev;
}

---

From source file:org.mule.util.ExceptionUtils.java

/**
 * This method returns the throwable closest to the root cause that matches the
 * specified class or subclass. Any null argument will make the method return
 * null.// w  w  w  . j a va 2  s  . c o m
 * 
 * @param throwable the throwable to inspect, may be null
 * @param type the type to search for, subclasses match, null returns null
 * @return the throwablethat is closest to the root in the throwable chain that
 *         matches the type or subclass of that type.
 */
public static Throwable getDeepestOccurenceOfType(Throwable throwable, Class<?> type) {
    if (throwable == null || type == null) {
        return null;
    }
    @SuppressWarnings("unchecked")
    List<Throwable> throwableList = getThrowableList(throwable);
    ListIterator<Throwable> listIterator = throwableList.listIterator(throwableList.size());
    while (listIterator.hasPrevious()) {
        Throwable candidate = listIterator.previous();
        if (type.isAssignableFrom(candidate.getClass())) {
            return candidate;
        }
    }
    return null;
}

---

From source file:Main.java

public static <T> Iterator<T> getReverseIterator(final ListIterator<T> iter) {
    return new Iterator<T>() {
        public boolean hasNext() {
            return iter.hasPrevious();
        }/*from  w  w  w  . j a va 2s .co m*/

        public T next() {
            return iter.previous();
        }

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

---

From source file:org.grails.datastore.mapping.query.order.ManualEntityOrdering.java

/**
 * Reverses the list.  The result is a new List with the identical contents
 * in reverse order.//ww  w.j a v a 2  s. com
 *
 * @param list a List
 * @return a reversed List
 */
private static List reverse(List list) {
    int size = list.size();
    List answer = new ArrayList(size);
    ListIterator iter = list.listIterator(size);
    while (iter.hasPrevious()) {
        answer.add(iter.previous());
    }
    return answer;
}

---

From source file:Main.java

public static <T> Iterable<T> reverse(final List<T> list) {
    return new Iterable<T>() {
        public Iterator<T> iterator() {
            final ListIterator<T> listIterator = list.listIterator(list.size());

            return new Iterator<T>() {
                public boolean hasNext() {
                    return listIterator.hasPrevious();
                }//  ww w.j  a  v a2  s  . co m

                public T next() {
                    return listIterator.previous();
                }

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

---

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