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:org.pshdl.model.impl.AbstractHDLVariable.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  v a2s .  c om*/
        public boolean hasNext() {
            if ((current != null) && !current.hasNext()) {
                current = null;
            }
            while (current == null) {
                switch (pos++) {
                case 0:
                    if ((dimensions != null) && (dimensions.size() != 0)) {
                        final List<Iterator<? extends IHDLObject>> iters = Lists
                                .newArrayListWithCapacity(dimensions.size());
                        for (final HDLExpression o : dimensions) {
                            iters.add(Iterators.forArray(o));
                            iters.add(o.deepIterator());
                        }
                        current = Iterators.concat(iters.iterator());
                    }
                    break;
                case 1:
                    if (defaultValue != null) {
                        current = Iterators.concat(Iterators.forArray(defaultValue),
                                defaultValue.deepIterator());
                    }
                    break;
                case 2:
                    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;
                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> createDynamicAccessibleIterable(final Transform<T> transform) {
    return new Iterable<T>() {

        @Override/*from w ww .  jav a  2 s.c o m*/
        public Iterator<T> iterator() {
            Set<Iterable<T>> iterable = BeanManagers.getDirectlyAccessibleComponents(BeanManagerImpl.this,
                    transform);
            return Iterators
                    .concat(Iterators.transform(iterable.iterator(), IterableToIteratorFunction.<T>instance()));
        }

    };
}

---

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

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

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

        @Override/*from w w w  . ja  v  a2  s  .co  m*/
        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 ((stmnts != null) && (stmnts.size() != 0)) {
                        final List<Iterator<? extends IHDLObject>> iters = Lists
                                .newArrayListWithCapacity(stmnts.size());
                        for (final HDLStatement o : stmnts) {
                            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.jeffplaisance.util.fingertree.Deep.java

@Override
public Iterator<T> iterator() {
    final Iterator<T> middleIteratorThunk = new Iterator<T>() {

        Iterator<T> middleIterator = null;

        Iterator<T> getMiddleIterator() {
            if (middleIterator == null) {
                middleIterator = Iterators
                        .concat(Iterators.transform(middle.iterator(), new Function<Node<V, T>, Iterator<T>>() {
                            @Override
                            public Iterator<T> apply(Node<V, T> ts) {
                                return ts.iterator();
                            }//from   w w w . j  av a  2 s .c o m
                        }));
            }
            return middleIterator;
        }

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

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

        @Override
        public void remove() {
            throw new UnsupportedOperationException();
        }
    };
    return Iterators.concat(prefix.iterator(), middleIteratorThunk, suffix.iterator());
}

---

From source file:io.prestosql.plugin.hive.s3.PrestoS3FileSystem.java

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

    ListObjectsRequest request = new ListObjectsRequest().withBucketName(getBucketName(uri)).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.AbstractHDLInterfaceRef.java

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

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

        @Override//from  w w w . j  a  v a 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;
                case 2:
                    if ((ifArray != null) && (ifArray.size() != 0)) {
                        final List<Iterator<? extends IHDLObject>> iters = Lists
                                .newArrayListWithCapacity(ifArray.size());
                        for (final HDLExpression o : ifArray) {
                            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.AbstractHDLUnresolvedFragment.java

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

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

        @Override/*from  w  w  w  .  jav  a  2 s. com*/
        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;
                case 2:
                    if (sub != null) {
                        current = Iterators.concat(Iterators.forArray(sub), sub.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.AbstractHDLUnresolvedFragmentFunction.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 2s  .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;
                case 2:
                    if (sub != null) {
                        current = Iterators.concat(Iterators.forArray(sub), sub.deepIterator());
                    }
                    break;
                case 3:
                    if ((params != null) && (params.size() != 0)) {
                        final List<Iterator<? extends IHDLObject>> iters = Lists
                                .newArrayListWithCapacity(params.size());
                        for (final HDLExpression o : params) {
                            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.diqube.data.types.dbl.dict.FpcDoubleDictionary.java

@Override
public Iterator<Pair<Long, Double>> iterator() {
    List<Iterator<Pair<Long, Double>>> pageIterators = pages.values().stream().map(page -> page.iterator())
            .collect(Collectors.toList());
    return Iterators.concat(pageIterators.iterator());
}

---

From source file:org.pshdl.model.impl.AbstractHDLDirectGeneration.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 . co  m
        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 (var != null) {
                        current = Iterators.concat(Iterators.forArray(var), var.deepIterator());
                    }
                    break;
                case 2:
                    if ((arguments != null) && (arguments.size() != 0)) {
                        final List<Iterator<? extends IHDLObject>> iters = Lists
                                .newArrayListWithCapacity(arguments.size());
                        for (final HDLArgument o : arguments) {
                            iters.add(Iterators.forArray(o));
                            iters.add(o.deepIterator());
                        }
                        current = Iterators.concat(iters.iterator());
                    }
                    break;
                case 3:
                    if (hIf != null) {
                        current = Iterators.concat(Iterators.forArray(hIf), hIf.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");
        }

    };
}

---

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