Example usage for com.google.common.collect Iterators concat

Introduction

In this page you can find the example usage for com.google.common.collect Iterators concat.

Prototype

public static <T> Iterator<T> concat(final Iterator<? extends Iterator<? extends T>> inputs) 

Source Link

Document

Combines multiple iterators into a single iterator.

Usage

From source file:com.facebook.presto.hive.PrestoS3FileSystem.java

private Iterator<LocatedFileStatus> listPrefix(Path path) {
    String key = keyFromPath(path);
    if (!key.isEmpty()) {
        key += "/";
    }/*from   w  ww .  j a  v a  2 s.  c o  m*/

    ListObjectsRequest request = new ListObjectsRequest().withBucketName(uri.getHost()).withPrefix(key)
            .withDelimiter("/");

    STATS.newListObjectsCall();
    Iterator<ObjectListing> listings = new AbstractSequentialIterator<ObjectListing>(s3.listObjects(request)) {
        @Override
        protected ObjectListing computeNext(ObjectListing previous) {
            if (!previous.isTruncated()) {
                return null;
            }
            return s3.listNextBatchOfObjects(previous);
        }
    };

    return Iterators.concat(Iterators.transform(listings, this::statusFromListing));
}

---

From source file:org.pshdl.model.impl.AbstractHDLVariableRef.java

@Override
public Iterator<IHDLObject> deepIterator() {
    return new Iterator<IHDLObject>() {

        private int pos = 0;
        private Iterator<? extends IHDLObject> current;

        @Override//w w w.  java 2 s .c o m
        public boolean hasNext() {
            if ((current != null) && !current.hasNext()) {
                current = null;
            }
            while (current == null) {
                switch (pos++) {
                case 0:
                    if ((array != null) && (array.size() != 0)) {
                        final List<Iterator<? extends IHDLObject>> iters = Lists
                                .newArrayListWithCapacity(array.size());
                        for (final HDLExpression o : array) {
                            iters.add(Iterators.forArray(o));
                            iters.add(o.deepIterator());
                        }
                        current = Iterators.concat(iters.iterator());
                    }
                    break;
                case 1:
                    if ((bits != null) && (bits.size() != 0)) {
                        final List<Iterator<? extends IHDLObject>> iters = Lists
                                .newArrayListWithCapacity(bits.size());
                        for (final HDLRange o : bits) {
                            iters.add(Iterators.forArray(o));
                            iters.add(o.deepIterator());
                        }
                        current = Iterators.concat(iters.iterator());
                    }
                    break;
                default:
                    return false;
                }
            }
            return (current != null) && current.hasNext();
        }

        @Override
        public IHDLObject next() {
            return current.next();
        }

        @Override
        public void remove() {
            throw new IllegalArgumentException("Not supported");
        }

    };
}

---

From source file:com.dataart.spreadsheetanalytics.engine.PoiWorkbookConverters.java

public PoiProxyCellIterator(PoiProxyCell[][][][] tile0) {
    final List<Iterator<PoiProxyCell>> iterators = new ArrayList<>(10);
    for (PoiProxyCell[][][] tile1 : tile0) {
        if (tile1 == null) {
            continue;
        }//ww  w.j a  v a 2s .  c o m

        for (PoiProxyCell[][] tile2 : tile1) {
            if (tile2 == null) {
                continue;
            }

            for (PoiProxyCell[] tile3 : tile2) {
                if (tile3 == null) {
                    continue;
                }

                iterators.add(Iterators.filter(Iterators.forArray(tile3), Predicates.notNull()));
            }
        }
    }

    this.iterator = Iterators.concat(iterators.iterator());
}

---

From source file:org.metastatic.rsync.TwoKeyMap.java

/**
 * Return an unmodifiable set of the SubTable objects in this class.
 *
 * @return A set of all sub-tables from this class.
 * @since 1.1//from  www .  ja  va2  s . com
 */
public Set<Entry<ChecksumPair, T>> entrySet() {
    return new AbstractSet<Entry<ChecksumPair, T>>() {
        @Override
        public Iterator<Entry<ChecksumPair, T>> iterator() {
            Iterator<Iterator<Entry<ChecksumPair, T>>> it = Iterators.transform(map.entrySet().iterator(),
                    new Function<Entry<Integer, Map<StrongKey, Value<T>>>, Iterator<Entry<ChecksumPair, T>>>() {
                        @Override
                        public Iterator<Entry<ChecksumPair, T>> apply(
                                final Entry<Integer, Map<StrongKey, Value<T>>> input) {
                            final Iterator<Entry<StrongKey, Value<T>>> it = input.getValue().entrySet()
                                    .iterator();
                            return new Iterator<Entry<ChecksumPair, T>>() {
                                @Override
                                public boolean hasNext() {
                                    return it.hasNext();
                                }

                                @Override
                                public Entry<ChecksumPair, T> next() {
                                    Entry<StrongKey, Value<T>> next = it.next();
                                    return new AbstractMap.SimpleEntry<ChecksumPair, T>(
                                            new ChecksumPair(next.getValue().weakKey, next.getKey().getBytes()),
                                            next.getValue().value);
                                }

                                @Override
                                public void remove() {
                                    it.remove();
                                }
                            };
                        }
                    });
            return Iterators.concat(it);
        }

        @Override
        public int size() {
            return TwoKeyMap.this.size();
        }
    };
}

---

From source file:com.splicemachine.fs.s3.PrestoS3FileSystem.java

private Iterator<LocatedFileStatus> listPrefix(Path path) {
    String key = keyFromPath(path);
    if (!key.isEmpty()) {
        key += PATH_SEPARATOR;// w w w  .  j av  a2 s.  c o m
    }

    ListObjectsRequest request = new ListObjectsRequest().withBucketName(uri.getHost()).withPrefix(key)
            .withDelimiter(PATH_SEPARATOR);

    STATS.newListObjectsCall();
    Iterator<ObjectListing> listings = new AbstractSequentialIterator<ObjectListing>(s3.listObjects(request)) {
        @Override
        protected ObjectListing computeNext(ObjectListing previous) {
            if (!previous.isTruncated()) {
                return null;
            }
            return s3.listNextBatchOfObjects(previous);
        }
    };

    return Iterators.concat(Iterators.transform(listings, this::statusFromListing));
}

---

From source file:org.pshdl.model.impl.AbstractHDLForLoop.java

@Override
public Iterator<IHDLObject> deepIterator() {
    return new Iterator<IHDLObject>() {

        private int pos = 0;
        private Iterator<? extends IHDLObject> current;

        @Override//  ww  w. j a va  2 s .co m
        public boolean hasNext() {
            if ((current != null) && !current.hasNext()) {
                current = null;
            }
            while (current == null) {
                switch (pos++) {
                case 0:
                    if ((range != null) && (range.size() != 0)) {
                        final List<Iterator<? extends IHDLObject>> iters = Lists
                                .newArrayListWithCapacity(range.size());
                        for (final HDLRange o : range) {
                            iters.add(Iterators.forArray(o));
                            iters.add(o.deepIterator());
                        }
                        current = Iterators.concat(iters.iterator());
                    }
                    break;
                case 1:
                    if (param != null) {
                        current = Iterators.concat(Iterators.forArray(param), param.deepIterator());
                    }
                    break;
                case 2:
                    if ((dos != null) && (dos.size() != 0)) {
                        final List<Iterator<? extends IHDLObject>> iters = Lists
                                .newArrayListWithCapacity(dos.size());
                        for (final HDLStatement o : dos) {
                            iters.add(Iterators.forArray(o));
                            iters.add(o.deepIterator());
                        }
                        current = Iterators.concat(iters.iterator());
                    }
                    break;
                default:
                    return false;
                }
            }
            return (current != null) && current.hasNext();
        }

        @Override
        public IHDLObject next() {
            return current.next();
        }

        @Override
        public void remove() {
            throw new IllegalArgumentException("Not supported");
        }

    };
}

---

From source file:org.pshdl.model.impl.AbstractHDLInlineFunction.java

@Override
public Iterator<IHDLObject> deepIterator() {
    return new Iterator<IHDLObject>() {

        private int pos = 0;
        private Iterator<? extends IHDLObject> current;

        @Override/*  w  w w.j  a va2s  . com*/
        public boolean hasNext() {
            if ((current != null) && !current.hasNext()) {
                current = null;
            }
            while (current == null) {
                switch (pos++) {
                case 0:
                    if ((annotations != null) && (annotations.size() != 0)) {
                        final List<Iterator<? extends IHDLObject>> iters = Lists
                                .newArrayListWithCapacity(annotations.size());
                        for (final HDLAnnotation o : annotations) {
                            iters.add(Iterators.forArray(o));
                            iters.add(o.deepIterator());
                        }
                        current = Iterators.concat(iters.iterator());
                    }
                    break;
                case 1:
                    if ((args != null) && (args.size() != 0)) {
                        final List<Iterator<? extends IHDLObject>> iters = Lists
                                .newArrayListWithCapacity(args.size());
                        for (final HDLFunctionParameter o : args) {
                            iters.add(Iterators.forArray(o));
                            iters.add(o.deepIterator());
                        }
                        current = Iterators.concat(iters.iterator());
                    }
                    break;
                case 2:
                    if (returnType != null) {
                        current = Iterators.concat(Iterators.forArray(returnType), returnType.deepIterator());
                    }
                    break;
                case 3:
                    if (expr != null) {
                        current = Iterators.concat(Iterators.forArray(expr), expr.deepIterator());
                    }
                    break;
                default:
                    return false;
                }
            }
            return (current != null) && current.hasNext();
        }

        @Override
        public IHDLObject next() {
            return current.next();
        }

        @Override
        public void remove() {
            throw new IllegalArgumentException("Not supported");
        }

    };
}

---

From source file:org.pshdl.model.impl.AbstractHDLNativeFunction.java

@Override
public Iterator<IHDLObject> deepIterator() {
    return new Iterator<IHDLObject>() {

        private int pos = 0;
        private Iterator<? extends IHDLObject> current;

        @Override/*from   ww  w. j av  a 2s.com*/
        public boolean hasNext() {
            if ((current != null) && !current.hasNext()) {
                current = null;
            }
            while (current == null) {
                switch (pos++) {
                case 0:
                    if ((annotations != null) && (annotations.size() != 0)) {
                        final List<Iterator<? extends IHDLObject>> iters = Lists
                                .newArrayListWithCapacity(annotations.size());
                        for (final HDLAnnotation o : annotations) {
                            iters.add(Iterators.forArray(o));
                            iters.add(o.deepIterator());
                        }
                        current = Iterators.concat(iters.iterator());
                    }
                    break;
                case 1:
                    if ((args != null) && (args.size() != 0)) {
                        final List<Iterator<? extends IHDLObject>> iters = Lists
                                .newArrayListWithCapacity(args.size());
                        for (final HDLFunctionParameter o : args) {
                            iters.add(Iterators.forArray(o));
                            iters.add(o.deepIterator());
                        }
                        current = Iterators.concat(iters.iterator());
                    }
                    break;
                case 2:
                    if (returnType != null) {
                        current = Iterators.concat(Iterators.forArray(returnType), returnType.deepIterator());
                    }
                    break;
                default:
                    return false;
                }
            }
            return (current != null) && current.hasNext();
        }

        @Override
        public IHDLObject next() {
            return current.next();
        }

        @Override
        public void remove() {
            throw new IllegalArgumentException("Not supported");
        }

    };
}

---

From source file:org.pshdl.model.impl.AbstractHDLPackage.java

@Override
public Iterator<IHDLObject> deepIterator() {
    return new Iterator<IHDLObject>() {

        private int pos = 0;
        private Iterator<? extends IHDLObject> current;

        @Override/*  w  w w  .j  av a 2 s. co m*/
        public boolean hasNext() {
            if ((current != null) && !current.hasNext()) {
                current = null;
            }
            while (current == null) {
                switch (pos++) {
                case 0:
                    if ((units != null) && (units.size() != 0)) {
                        final List<Iterator<? extends IHDLObject>> iters = Lists
                                .newArrayListWithCapacity(units.size());
                        for (final HDLUnit o : units) {
                            iters.add(Iterators.forArray(o));
                            iters.add(o.deepIterator());
                        }
                        current = Iterators.concat(iters.iterator());
                    }
                    break;
                case 1:
                    if ((declarations != null) && (declarations.size() != 0)) {
                        final List<Iterator<? extends IHDLObject>> iters = Lists
                                .newArrayListWithCapacity(declarations.size());
                        for (final HDLDeclaration o : declarations) {
                            iters.add(Iterators.forArray(o));
                            iters.add(o.deepIterator());
                        }
                        current = Iterators.concat(iters.iterator());
                    }
                    break;
                default:
                    return false;
                }
            }
            return (current != null) && current.hasNext();
        }

        @Override
        public IHDLObject next() {
            return current.next();
        }

        @Override
        public void remove() {
            throw new IllegalArgumentException("Not supported");
        }

    };
}

---

From source file:org.jboss.weld.manager.BeanManagerImpl.java

private <T> Iterable<T> createDynamicGlobalIterable(final Transform<T> transform) {
    return new Iterable<T>() {
        @Override/*from www . j  av  a 2s  .  com*/
        public Iterator<T> iterator() {
            Set<Iterable<T>> result = new HashSet<Iterable<T>>();
            for (BeanManagerImpl manager : managers) {
                result.add(transform.transform(manager));
            }
            return Iterators
                    .concat(Iterators.transform(result.iterator(), IterableToIteratorFunction.<T>instance()));
        }
    };
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• »