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:eu.eidas.auth.commons.PersonalAttributeList.java

/**
 * {@inheritDoc}/*  w w w  . j  a v a2  s. c o  m*/
 */
@Nonnull
@Override
public Iterator<PersonalAttribute> iterator() {
    final Iterator<ConcurrentLinkedQueue<PersonalAttribute>> outerIterator = map.values().iterator();
    Iterator<PersonalAttribute> personalAttributeIterator = new Iterator<PersonalAttribute>() {

        Iterator<PersonalAttribute> currentInnerIterator;

        @Override
        public boolean hasNext() {
            return (currentInnerIterator != null && currentInnerIterator.hasNext()) || outerIterator.hasNext();
        }

        @Override
        public PersonalAttribute next() {
            if (null == currentInnerIterator || !currentInnerIterator.hasNext()) {
                currentInnerIterator = outerIterator.next().iterator();

            }
            return currentInnerIterator.next();
        }

        @Override
        public void remove() {
            if (null != currentInnerIterator) {
                currentInnerIterator.remove();
            }
            if (null != currentInnerIterator && !currentInnerIterator.hasNext() && null != outerIterator) {
                outerIterator.remove();
            }
        }
    };
    return personalAttributeIterator;
}

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

/**
 * This iterator acts on the underlying collection of scans in
 * Chromatogram1D, so be careful with concurrent access / modification!
 */// w ww .  j  av  a 2 s .c  om
@Override
public Iterator<IScan1D> iterator() {

    final Iterator<IScan1D> iter = new Iterator<IScan1D>() {
        private int currentPos = 0;

        @Override
        public boolean hasNext() {
            return this.currentPos < getScans().size() - 1;
        }

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

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

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From source file:WeakValueHashMap.java

/**
 * Returns a <code>Collection</code> view of the values contained
 * in this map.<p>/*  w ww . j av a 2s.  c om*/
 * @return a <code>Collection</code> view of the values contained
 * in this map.
 */
public Collection values() {
    // delegates to entrySet, because super method returns
    // WeakValues instead of value objects
    if (values == null) {
        values = new AbstractCollection() {
            public Iterator iterator() {
                return new Iterator() {
                    private Iterator i = entrySet().iterator();

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

                    public Object next() {
                        return ((Entry) i.next()).getValue();
                    }

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

            public int size() {
                return WeakValueHashMap.this.size();
            }

            public boolean contains(Object v) {
                return WeakValueHashMap.this.containsValue(v);
            }
        };
    }
    return values;
}

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From source file:org.deegree.feature.persistence.geocouch.GeoCouchFeatureStore.java

@Override
public FeatureInputStream query(final Query[] queries) throws FeatureStoreException, FilterEvaluationException {

    // check for most common case: multiple featuretypes, same bbox (WMS), no filter
    boolean wmsStyleQuery = false;
    Envelope env = queries[0].getPrefilterBBoxEnvelope();
    if (queries[0].getFilter() == null && queries[0].getSortProperties().length == 0) {
        wmsStyleQuery = true;//from  w  w  w. j a v  a2s.  c om
        for (int i = 1; i < queries.length; i++) {
            Envelope queryBBox = queries[i].getPrefilterBBoxEnvelope();
            if (queryBBox != env && queries[i].getFilter() != null && queries[i].getSortProperties() != null) {
                wmsStyleQuery = false;
                break;
            }
        }
    }

    if (wmsStyleQuery) {
        // return queryMultipleFts( queries, env );
    }

    Iterator<FeatureInputStream> rsIter = new Iterator<FeatureInputStream>() {
        int i = 0;

        @Override
        public boolean hasNext() {
            return i < queries.length;
        }

        @Override
        public FeatureInputStream next() {
            if (!hasNext()) {
                throw new NoSuchElementException();
            }
            FeatureInputStream rs;
            try {
                rs = query(queries[i++]);
            } catch (Throwable e) {
                LOG.debug(e.getMessage(), e);
                throw new RuntimeException(e.getMessage(), e);
            }
            return rs;
        }

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

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From source file:com.slytechs.capture.file.editor.AbstractRawIterator.java

public Iterator<ByteBuffer> iterator() {
    final RawIterator i = this;
    return new Iterator<ByteBuffer>() {

        /* (non-Javadoc)
        * @see java.util.Iterator#hasNext()
        *//*from  w  w  w .jav a  2 s .  com*/
        public boolean hasNext() {
            try {
                return i.hasNext();
            } catch (IOException e) {
                throw new RuntimeIOException(e);
            }
        }

        /* (non-Javadoc)
        * @see java.util.Iterator#next()
        */
        public ByteBuffer next() {
            try {
                return i.next();
            } catch (IOException e) {
                throw new RuntimeIOException(e);
            }
        }

        /* (non-Javadoc)
        * @see java.util.Iterator#remove()
        */
        public void remove() {
            try {
                i.remove();
            } catch (IOException e) {
                throw new RuntimeIOException(e);
            }
        }

    };
}

---

From source file:org.apache.phoenix.util.PhoenixRuntime.java

/**
 * Get the list of uncommitted KeyValues for the connection. Currently used to write an
 * Phoenix-compliant HFile from a map/reduce job.
 * @param conn an open JDBC connection/*  w w  w.ja v a2s.  c  o m*/
 * @return the list of HBase mutations for uncommitted data
 * @throws SQLException
 */
public static Iterator<Pair<byte[], List<KeyValue>>> getUncommittedDataIterator(Connection conn,
        boolean includeMutableIndexes) throws SQLException {
    final PhoenixConnection pconn = conn.unwrap(PhoenixConnection.class);
    final Iterator<Pair<byte[], List<Mutation>>> iterator = pconn.getMutationState()
            .toMutations(includeMutableIndexes);
    return new Iterator<Pair<byte[], List<KeyValue>>>() {

        @Override
        public boolean hasNext() {
            return iterator.hasNext();
        }

        @Override
        public Pair<byte[], List<KeyValue>> next() {
            Pair<byte[], List<Mutation>> pair = iterator.next();
            List<KeyValue> keyValues = Lists.newArrayListWithExpectedSize(pair.getSecond().size() * 5); // Guess-timate 5 key values per row
            for (Mutation mutation : pair.getSecond()) {
                for (List<Cell> keyValueList : mutation.getFamilyCellMap().values()) {
                    for (Cell keyValue : keyValueList) {
                        keyValues.add(org.apache.hadoop.hbase.KeyValueUtil.ensureKeyValue(keyValue));
                    }
                }
            }
            Collections.sort(keyValues, pconn.getKeyValueBuilder().getKeyValueComparator());
            return new Pair<byte[], List<KeyValue>>(pair.getFirst(), keyValues);
        }

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

    };
}

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From source file:Base64InputStream.java

/**
 * Returns an iterator over this buffer's elements.
 *
 * @return an iterator over this buffer's elements
 *///from w w w. j a v  a  2s  . co m
public Iterator<Byte> iterator() {
    return new Iterator<Byte>() {

        private int index = head;
        private int lastReturnedIndex = -1;

        public boolean hasNext() {
            return index != tail;

        }

        public Byte next() {
            if (!hasNext()) {
                throw new NoSuchElementException();
            }
            lastReturnedIndex = index;
            index = increment(index);
            return new Byte(buffer[lastReturnedIndex]);
        }

        public void remove() {
            if (lastReturnedIndex == -1) {
                throw new IllegalStateException();
            }

            // First element can be removed quickly
            if (lastReturnedIndex == head) {
                UnboundedFifoByteBuffer.this.remove();
                lastReturnedIndex = -1;
                return;
            }

            // Other elements require us to shift the subsequent elements
            int i = lastReturnedIndex + 1;
            while (i != tail) {
                if (i >= buffer.length) {
                    buffer[i - 1] = buffer[0];
                    i = 0;
                } else {
                    buffer[i - 1] = buffer[i];
                    i++;
                }
            }

            lastReturnedIndex = -1;
            tail = decrement(tail);
            buffer[tail] = 0;
            index = decrement(index);
        }

    };
}

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

@Override
public Iterable<Properties> getPropertiesSets(String key) {
    try {/*w w  w.j a  v a  2 s . c  o  m*/
        final JSONArray array = obj.getJSONArray(key);

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

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

                    @Override
                    public Properties next() {
                        try {
                            return (n > i) ? new JSONProperties(array.getJSONObject(i++)) : null;
                        } catch (JSONException e) {
                            return null;
                        }
                    }

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

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

---

From source file:com.addthis.hydra.data.io.DiskBackedList2.java

public Iterator<byte[]> getEncodedData() {
    return new Iterator<byte[]>() {
        final Iterator<K> iter = listIterator();

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

        @Override
        public byte[] next() {
            try {
                return codec.encode(iter.next());
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }

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

---

From source file:com.github.jsonj.JsonArray.java

@Override
public Iterator<JsonElement> iterator() {
    if (immutable) {
        Iterator<JsonElement> it = super.iterator();
        return new Iterator<JsonElement>() {

            @Override/* www .ja v a 2  s .c om*/
            public boolean hasNext() {
                return it.hasNext();
            }

            @Override
            public JsonElement next() {
                return it.next();
            }

            @Override
            public void remove() {
                throw new IllegalStateException("object is immutable");
            }
        };
    } else {
        return super.iterator();
    }
}

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