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:net.sf.maltcms.chromaui.project.spi.descriptors.CachingChromatogram1D.java

@Override
public Iterable<IScan1D> subsetByScanAcquisitionTime(double startSat, double stopSat) {
    final int startIndex = getIndexFor(startSat);
    if (startIndex < 0) {
        throw new ArrayIndexOutOfBoundsException(startIndex);
    }/*w w w.  j ava 2 s. co  m*/
    final int stopIndex = getIndexFor(stopSat);
    if (stopIndex > getNumberOfScans() - 1) {
        throw new ArrayIndexOutOfBoundsException(stopIndex);
    }
    final Iterator<IScan1D> iter = new Iterator<IScan1D>() {
        private int currentPos = startIndex;

        @Override
        public boolean hasNext() {
            return this.currentPos < stopIndex;
        }

        @Override
        public IScan1D next() {
            return getScan(this.currentPos++);
        }

        @Override
        public void remove() {
            throw new UnsupportedOperationException("Can not remove scans with iterator!");
        }
    };
    return new Iterable<IScan1D>() {
        @Override
        public Iterator<IScan1D> iterator() {
            return iter;
        }
    };
}

From source file:oculus.aperture.common.JSONProperties.java

@Override
public Iterable<Float> getFloats(String key) {
    try {/*from   w w  w .  j  ava  2  s. c  om*/
        final JSONArray array = obj.getJSONArray(key);

        return new Iterable<Float>() {
            @Override
            public Iterator<Float> iterator() {
                return new Iterator<Float>() {
                    private final int n = array.length();
                    private int i = 0;

                    @Override
                    public boolean hasNext() {
                        return n > i;
                    }

                    @Override
                    public Float next() {
                        try {
                            return (n > i) ? (float) array.getDouble(i++) : null;
                        } catch (JSONException e) {
                            return null;
                        }
                    }

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

    } catch (JSONException e) {
        return EmptyIterable.instance();
    }
}

From source file:org.briljantframework.array.AbstractComplexArray.java

@Override
public Stream<Complex> stream() {
    return StreamSupport.stream(Spliterators.spliterator(new Iterator<Complex>() {
        int current = 0;

        @Override//from   w  w  w. j a  v a 2 s  .  c  o  m
        public boolean hasNext() {
            return current < size();
        }

        @Override
        public Complex next() {
            return get(current++);
        }
    }, size(), Spliterator.SIZED), false);
}

From source file:com.aliyun.odps.mapred.local.LocalTaskContext.java

@Override
public Iterator<Record> readResourceTable(String tbl) throws IOException {
    if (StringUtils.isEmpty(tbl)) {
        throw new IOException("Table resouce name is empty or null");
    }//from w  w  w.j  a v a2  s.c  o m

    if (!jobDirecotry.hasResource(tbl)) {
        String project = SessionState.get().getOdps().getDefaultProject();
        try {
            WareHouse.getInstance().copyResource(project, tbl, jobDirecotry.getResourceDir(),
                    WareHouse.getInstance().getLimitDownloadRecordCount(),
                    WareHouse.getInstance().getInputColumnSeperator());
        } catch (OdpsException e) {
        }
    }

    File dir = new File(jobDirecotry.getResourceDir(), tbl);
    LOG.info("Reading resource table from " + dir);
    final List<File> datafiles = new ArrayList<File>();

    LocalRunUtils.listAllDataFiles(dir, datafiles);

    final TableMeta tableMeta = SchemaUtils.readSchema(dir);

    return new Iterator<Record>() {
        RecordReader reader;
        Record current;
        boolean fetched;

        @Override
        public boolean hasNext() {
            if (fetched) {
                return current != null;
            }
            // Fetch new one
            try {
                fetch();
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
            return current != null;

        }

        private void fetch() throws IOException {

            // first time
            if (reader == null) {
                if (datafiles.isEmpty()) {
                    current = null;
                    fetched = true;
                    return;
                }

                File f = datafiles.remove(0);
                reader = new CSVRecordReader(new FileSplit(f, tableMeta.getCols(), 0, f.getTotalSpace()),
                        tableMeta, LocalJobRunner.EMPTY_COUNTER, LocalJobRunner.EMPTY_COUNTER, counters,
                        WareHouse.getInstance().getInputColumnSeperator());
                current = reader.read();
                fetched = true;
                return;
            }

            current = reader.read();
            if (current == null && !datafiles.isEmpty()) {
                File f = datafiles.remove(0);
                reader = new CSVRecordReader(new FileSplit(f, tableMeta.getCols(), 0, f.getTotalSpace()),
                        tableMeta, LocalJobRunner.EMPTY_COUNTER, LocalJobRunner.EMPTY_COUNTER, counters,
                        WareHouse.getInstance().getInputColumnSeperator());
                current = reader.read();
                fetched = true;
                return;
            }

            fetched = true;
        }

        @Override
        public Record next() {
            if (!hasNext()) {
                throw new NoSuchElementException();
            }
            fetched = false;
            return current;
        }

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

    };
}

From source file:org.libreplan.business.planner.chart.ContiguousDaysLine.java

@Override
public Iterator<OnDay<T>> iterator() {
    final Iterator<T> iterator = values.iterator();
    return new Iterator<OnDay<T>>() {

        private LocalDate current = startInclusive;

        @Override//from   w  w w. j  a va  2  s.c o  m
        public boolean hasNext() {
            return iterator.hasNext();
        }

        @Override
        public OnDay<T> next() {
            T next = iterator.next();
            OnDay<T> result = new OnDay<T>(current, next);
            current = current.plusDays(1);
            return result;
        }

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

From source file:org.briljantframework.array.AbstractBooleanArray.java

@Override
public Stream<Boolean> stream() {
    return StreamSupport.stream(Spliterators.spliterator(new Iterator<Boolean>() {
        int current = 0;

        @Override//from www. j a v  a  2s.c o m
        public boolean hasNext() {
            return current < size();
        }

        @Override
        public Boolean next() {
            return get(current++);
        }
    }, size(), Spliterator.SIZED), false);
}

From source file:com.oltpbenchmark.util.CollectionUtil.java

/**
 * Wrap an Iterable around an Enumeration
 * @param <T>//  www . j a v a 2s .c om
 * @param e
 * @return
 */
public static <T> Iterable<T> iterable(final Enumeration<T> e) {
    return (new Iterable<T>() {
        @Override
        public Iterator<T> iterator() {
            return new Iterator<T>() {
                @Override
                public boolean hasNext() {
                    return (e.hasMoreElements());
                }

                @Override
                public T next() {
                    return (e.nextElement());
                }

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

From source file:org.apache.taverna.scufl2.translator.t2flow.t23activities.ExternalToolActivityParser.java

@SuppressWarnings("unused")
private Iterable<Element> elementIter(final NodeList nodeList) {
    return new Iterable<Element>() {
        @Override/*from  w  w  w  . j a  v  a2  s  .c om*/
        public Iterator<Element> iterator() {
            return new Iterator<Element>() {
                int position = 0;

                @Override
                public boolean hasNext() {
                    return nodeList.getLength() > position;
                }

                @Override
                public Element next() {
                    return (Element) nodeList.item(position++);
                }

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

From source file:org.apache.spark.sql.execution.vectorized.ColumnarBatch.java

/**
 * Returns an iterator over the rows in this batch. This skips rows that are filtered out.
 *///from   ww w  .  java  2 s. co m
public Iterator<Row> rowIterator() {
    final int maxRows = ColumnarBatch.this.numRows();
    final Row row = new Row(this);
    return new Iterator<Row>() {
        int rowId = 0;

        @Override
        public boolean hasNext() {
            while (rowId < maxRows && ColumnarBatch.this.filteredRows[rowId]) {
                ++rowId;
            }
            return rowId < maxRows;
        }

        @Override
        public Row next() {
            while (rowId < maxRows && ColumnarBatch.this.filteredRows[rowId]) {
                ++rowId;
            }
            if (rowId >= maxRows) {
                throw new NoSuchElementException();
            }
            row.rowId = rowId++;
            return row;
        }

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

From source file:net.sf.maltcms.chromaui.project.spi.descriptors.CachingChromatogram1D.java

@Override
public Iterable<IScan1D> subsetByScanIndex(final int startIndex, final int stopIndex) {
    if (startIndex < 0) {
        throw new ArrayIndexOutOfBoundsException(startIndex);
    }//from  w w  w.  j  a v  a  2s. co  m
    if (stopIndex > getNumberOfScans() - 1) {
        throw new ArrayIndexOutOfBoundsException(stopIndex);
    }
    final Iterator<IScan1D> iter = new Iterator<IScan1D>() {
        private int currentPos = startIndex;

        @Override
        public boolean hasNext() {
            return this.currentPos < stopIndex;
        }

        @Override
        public IScan1D next() {
            return getScan(this.currentPos++);
        }

        @Override
        public void remove() {
            throw new UnsupportedOperationException("Can not remove scans with iterator!");
        }
    };
    return new Iterable<IScan1D>() {
        @Override
        public Iterator<IScan1D> iterator() {
            return iter;
        }
    };
}