Example usage for org.apache.commons.collections.iterators ReverseListIterator ReverseListIterator

Introduction

In this page you can find the example usage for org.apache.commons.collections.iterators ReverseListIterator ReverseListIterator.

Prototype

public ReverseListIterator(List list) 

Source Link

Document

Constructor that wraps a list.

Usage

From source file:com.bigdata.dastor.db.filter.SliceQueryFilter.java

public SuperColumn filterSuperColumn(SuperColumn superColumn, int gcBefore) {
    // we clone shallow, then add, under the theory that generally we're interested in a relatively small number of subcolumns.
    // this may be a poor assumption.
    SuperColumn scFiltered = superColumn.cloneMeShallow();
    Iterator<IColumn> subcolumns;
    if (reversed) {
        List<IColumn> columnsAsList = new ArrayList<IColumn>(superColumn.getSubColumns());
        subcolumns = new ReverseListIterator(columnsAsList);
    } else {/*from  w  w w. jav a  2 s.  co m*/
        subcolumns = superColumn.getSubColumns().iterator();
    }

    // iterate until we get to the "real" start column
    Comparator<byte[]> comparator = reversed ? superColumn.getComparator().getReverseComparator()
            : superColumn.getComparator();
    while (subcolumns.hasNext()) {
        IColumn column = subcolumns.next();
        if (comparator.compare(column.name(), start) >= 0) {
            subcolumns = IteratorUtils.chainedIterator(IteratorUtils.singletonIterator(column), subcolumns);
            break;
        }
    }
    // subcolumns is either empty now, or has been redefined in the loop above.  either is ok.
    collectReducedColumns(scFiltered, subcolumns, gcBefore);
    return scFiltered;
}

---

From source file:com.jaspersoft.jasperserver.api.engine.jasperreports.domain.impl.CompositeReportExecutionListener.java

public void end(boolean success, long time) {
    for (Iterator<?> it = new ReverseListIterator(listeners); it.hasNext();) {
        ReportExecutionListener listener = (ReportExecutionListener) it.next();
        listener.end(success, time);/*from  w ww .  ja  va  2  s.  co m*/
    }
}

---

From source file:org.apache.cassandra.db.filter.SliceQueryFilter.java

public SuperColumn filterSuperColumn(SuperColumn superColumn, int gcBefore) {
    // we clone shallow, then add, under the theory that generally we're interested in a relatively small number of subcolumns.
    // this may be a poor assumption.
    SuperColumn scFiltered = superColumn.cloneMeShallow();
    Iterator<IColumn> subcolumns;
    if (reversed) {
        List<IColumn> columnsAsList = new ArrayList<IColumn>(superColumn.getSubColumns());
        subcolumns = new ReverseListIterator(columnsAsList);
    } else {/*from   w w w . java 2  s. com*/
        subcolumns = superColumn.getSubColumns().iterator();
    }

    // iterate until we get to the "real" start column
    Comparator<ByteBuffer> comparator = reversed ? superColumn.getComparator().reverseComparator
            : superColumn.getComparator();
    while (subcolumns.hasNext()) {
        IColumn column = subcolumns.next();
        if (comparator.compare(column.name(), start) >= 0) {
            subcolumns = IteratorUtils.chainedIterator(IteratorUtils.singletonIterator(column), subcolumns);
            break;
        }
    }
    // subcolumns is either empty now, or has been redefined in the loop above.  either is ok.
    collectReducedColumns(scFiltered, subcolumns, gcBefore);
    return scFiltered;
}

---