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

Introduction

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

Prototype

public AbstractIteratorDecorator(Iterator iterator) 

Source Link

Document

Constructor that decorates the specified iterator.

Usage

From source file:org.apache.jackrabbit.core.query.lucene.SearchIndex.java

/**
 * This implementation forwards the call to
 * {@link MultiIndex#update(java.util.Iterator, java.util.Iterator)} and
 * transforms the two iterators to the required types.
 *
 * @param remove uuids of nodes to remove.
 * @param add    NodeStates to add. Calls to <code>next()</code> on this
 *               iterator may return <code>null</code>, to indicate that a
 *               node could not be indexed successfully.
 * @throws RepositoryException if an error occurs while indexing a node.
 * @throws IOException         if an error occurs while updating the index.
 *//*from w  w w .j  av  a  2 s .  co  m*/
public void updateNodes(NodeIdIterator remove, NodeStateIterator add) throws RepositoryException, IOException {
    checkOpen();
    final Map aggregateRoots = new HashMap();
    final Set removedNodeIds = new HashSet();
    final Set addedNodeIds = new HashSet();
    index.update(new AbstractIteratorDecorator(remove) {
        public Object next() {
            NodeId nodeId = (NodeId) super.next();
            removedNodeIds.add(nodeId);
            return nodeId.getUUID();
        }
    }, new AbstractIteratorDecorator(add) {
        public Object next() {
            NodeState state = (NodeState) super.next();
            if (state == null) {
                return null;
            }
            addedNodeIds.add(state.getNodeId());
            removedNodeIds.remove(state.getNodeId());
            Document doc = null;
            try {
                doc = createDocument(state, getNamespaceMappings(), index.getIndexFormatVersion());
                retrieveAggregateRoot(state, aggregateRoots);
            } catch (RepositoryException e) {
                log.warn("Exception while creating document for node: " + state.getNodeId() + ": "
                        + e.toString());
            }
            return doc;
        }
    });

    // remove any aggregateRoot nodes that are new
    // and therefore already up-to-date
    aggregateRoots.keySet().removeAll(addedNodeIds);

    // based on removed NodeIds get affected aggregate root nodes
    retrieveAggregateRoot(removedNodeIds, aggregateRoots);

    // update aggregates if there are any affected
    if (aggregateRoots.size() > 0) {
        index.update(new AbstractIteratorDecorator(aggregateRoots.keySet().iterator()) {
            public Object next() {
                return ((NodeId) super.next()).getUUID();
            }
        }, new AbstractIteratorDecorator(aggregateRoots.values().iterator()) {
            public Object next() {
                NodeState state = (NodeState) super.next();
                try {
                    return createDocument(state, getNamespaceMappings(), index.getIndexFormatVersion());
                } catch (RepositoryException e) {
                    log.warn("Exception while creating document for node: " + state.getNodeId() + ": "
                            + e.toString());
                }
                return null;
            }
        });
    }
}

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From source file:org.onehippo.forge.document.commenting.cms.impl.SimpleListDataProvider.java

@Override
public Iterator<? extends T> iterator(final long first, final long count) {
    return new AbstractIteratorDecorator(list.listIterator((int) first)) {
        private int iterationCount;

        @Override/*from   w  ww  .  j  ava 2s  .  co  m*/
        public boolean hasNext() {
            return super.hasNext() && (iterationCount < (int) count);
        }

        @Override
        public Object next() {
            try {
                return super.next();
            } finally {
                iterationCount += 1;
            }
        }
    };
}

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From source file:org.onehippo.forge.exdocpicker.impl.SimpleExternalDocumentCollection.java

@SuppressWarnings("unchecked")
@Override/*  w w w. j a v a  2 s .c  om*/
public Iterator<? extends T> iterator(long first, final long count) {
    return new AbstractIteratorDecorator(list.listIterator((int) first)) {
        private int iterationCount;

        @Override
        public boolean hasNext() {
            return super.hasNext() && (iterationCount < (int) count);
        }

        @Override
        public Object next() {
            try {
                return super.next();
            } finally {
                iterationCount += 1;
            }
        }
    };
}

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From source file:org.paxml.table.AbstractTable.java

@Override
public Iterator<IRow> getRows() {
    ITableRange r = getRange();//from  ww w  .ja v  a  2 s.  c  om
    Iterator<IRow> it;
    if (r == null) {
        it = getAllRows();
    } else {
        it = new RangedIterator<IRow>(r.getFirstRow(), r.getLastRow(), getAllRows());
    }
    return new AbstractIteratorDecorator(it) {

        @Override
        public Object next() {
            Object n = super.next();
            currentRowIndex++;
            return n;
        }

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

    };
}

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From source file:org.paxml.table.csv.CsvRow.java

@Override
protected Iterator<ICell> getAllCells() {
    return new AbstractIteratorDecorator(getTable().getColumnCurrentRow().iterator()) {
        private int index = 0;

        @Override//from w w w . j a v  a  2 s.  c  o  m
        public Object next() {
            return new CsvCell(CsvRow.this, index++);
        }

    };
}

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From source file:org.paxml.table.excel.ExcelRow.java

@Override
protected Iterator<ICell> getAllCells() {

    Iterator<ICell> it;//from w w w .j a  v  a 2  s .c o  m
    if (getTable().isCompact()) {
        it = new AbstractIteratorDecorator(row.cellIterator()) {

            @Override
            public Object next() {
                Cell cell = (Cell) getIterator().next();
                return new ExcelCell(cell, ExcelRow.this);
            }

        };
    } else {
        it = new Iterator<ICell>() {
            private int i;

            @Override
            public boolean hasNext() {
                return i < row.getLastCellNum();
            }

            @Override
            public ICell next() {
                return getCell(i++);
            }

            @Override
            public void remove() {
                Cell c = row.getCell(i);
                if (c != null) {
                    row.removeCell(c);
                }
            }

        };
    }
    return it;
}

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From source file:org.paxml.table.excel.ExcelTable.java

@Override
protected Iterator<IRow> getAllRows() {

    if (compact) {
        Iterator it = sheet.rowIterator();

        return new AbstractIteratorDecorator(it) {

            @Override/* w  w w. j a v  a  2  s. com*/
            public Object next() {

                return new ExcelRow((Row) getIterator().next(), ExcelTable.this);

            }

        };
    } else {
        return new Iterator<IRow>() {

            private int index = 0;

            @Override
            public boolean hasNext() {
                return index <= sheet.getLastRowNum();
            }

            @Override
            public IRow next() {

                ExcelRow r = getRow(index);
                index++;
                return r;

            }

            @Override
            public void remove() {
                Row row = sheet.getRow(index);
                if (row != null) {
                    sheet.removeRow(row);
                }
            }

        };
    }
}

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From source file:org.paxml.table.jdbc.JdbcTable.java

@Override
protected Iterator<IRow> getAllRows() {
    return new AbstractIteratorDecorator(new ResultSetIterator(rs)) {
        private int index;

        @Override//w w w .  ja v  a 2 s .  co m
        public Object next() {

            Object[] row = (Object[]) super.next();
            return new JdbcRow(index++, row, JdbcTable.this);
        }

    };

}

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