List of usage examples for com.google.common.collect Iterators concat
public static <T> Iterator<T> concat(final Iterator<? extends Iterator<? extends T>> inputs)
From source file:org.fcrepo.kernel.rdf.impl.NodeTypeRdfContext.java
/** * Convert a NodeType into an RDF stream by capturing the supertypes, node * definitions, and property definitions of the type as RDFS triples. * * @param nodeType/* ww w .j a va 2 s . c om*/ * @throws RepositoryException */ public NodeTypeRdfContext(final NodeType nodeType) throws RepositoryException { super(); final Node nodeTypeResource = getResource(nodeType).asNode(); final String nodeTypeName = nodeType.getName(); LOGGER.trace("Adding triples for nodeType: {} with URI: {}", nodeTypeName, nodeTypeResource.getURI()); concat(map(nodeType.getDeclaredSupertypes(), new Function<NodeType, Triple>() { @Override public Triple apply(final NodeType input) { final Node supertypeNode; try { supertypeNode = getResource(input).asNode(); LOGGER.trace("Adding triple for nodeType: {} with subclass: {}", nodeTypeName, supertypeNode.getURI()); return create(nodeTypeResource, subClassOf.asNode(), supertypeNode); } catch (final RepositoryException e) { throw propagate(e); } } })); concat(Iterators .concat(Iterators.transform( Iterators.filter(forArray(nodeType.getDeclaredChildNodeDefinitions()), not(isWildcardResidualDefinition)), new NodeDefinitionToTriples(nodeTypeResource)))); concat(Iterators .concat(Iterators.transform( Iterators.filter(forArray(nodeType.getDeclaredPropertyDefinitions()), not(isWildcardResidualDefinition)), new PropertyDefinitionToTriples(nodeTypeResource)))); concat(create(nodeTypeResource, type.asNode(), Class.asNode()), create(nodeTypeResource, label.asNode(), createLiteral(nodeTypeName))); }
From source file:com.sk89q.worldedit.regions.RegionIntersection.java
@SuppressWarnings({ "unchecked", "rawtypes" })
@Override/*from w w w .jav a 2 s. c o m*/
public Iterator<BlockVector> iterator() {
Iterator<BlockVector>[] iterators = (Iterator<BlockVector>[]) new Iterator[regions.size()];
for (int i = 0; i < regions.size(); i++) {
iterators[i] = regions.get(i).iterator();
}
return Iterators.concat(iterators);
}
From source file:org.fcrepo.kernel.rdf.impl.HierarchyRdfContext.java
private Iterator<Triple> childrenContext() throws RepositoryException { final Iterator<javax.jcr.Node> niceChildren = Iterators.filter(new NodeIterator(node().getNodes()), not(nastyChildren));/*from ww w . ja va 2s . c om*/ final Iterator<javax.jcr.Node> salientChildren; if (options.hasOffset()) { int offset = options.getOffset(); Iterators.advance(niceChildren, offset); } if (options.hasLimit()) { salientChildren = Iterators.limit(niceChildren, options.getLimit()); } else { salientChildren = niceChildren; } return Iterators.concat(Iterators.transform(salientChildren, child2triples())); }
From source file:org.apache.mahout.common.iterator.sequencefile.SequenceFileDirIterator.java
private void init(FileStatus[] statuses, final boolean reuseKeyValueInstances, final Configuration conf) { /*/*from w w w .java2s . c o m*/ * prevent NPEs. Unfortunately, Hadoop would return null for list if nothing * was qualified. In this case, which is a corner case, we should assume an * empty iterator, not an NPE. */ if (statuses == null) { statuses = NO_STATUSES; } Iterator<FileStatus> fileStatusIterator = Iterators.forArray(statuses); Iterator<Iterator<Pair<K, V>>> fsIterators = Iterators.transform(fileStatusIterator, new Function<FileStatus, Iterator<Pair<K, V>>>() { @Override public Iterator<Pair<K, V>> apply(FileStatus from) { try { SequenceFileIterator<K, V> iterator = new SequenceFileIterator<K, V>(from.getPath(), reuseKeyValueInstances, conf); iterators.add(iterator); return iterator; } catch (IOException ioe) { throw new IllegalStateException(from.getPath().toString(), ioe); } } }); Collections.reverse(iterators); // close later in reverse order delegate = Iterators.concat(fsIterators); }
From source file:org.fcrepo.kernel.impl.rdf.impl.HierarchyRdfContext.java
private Iterator<Triple> childrenContext() throws RepositoryException { final Iterator<javax.jcr.Node> niceChildren = Iterators.filter(new NodeIterator(node().getNodes()), not(nastyChildren));// w w w. j av a2 s . c o m final Iterator<javax.jcr.Node> salientChildren; if (options.hasOffset()) { final int offset = options.getOffset(); Iterators.advance(niceChildren, offset); } if (options.hasLimit()) { salientChildren = Iterators.limit(niceChildren, options.getLimit()); } else { salientChildren = niceChildren; } return Iterators.concat(Iterators.transform(salientChildren, child2triples())); }
From source file:org.fcrepo.kernel.impl.rdf.impl.NodeTypeRdfContext.java
/** * Convert a NodeType into an RDF stream by capturing the supertypes, node * definitions, and property definitions of the type as RDFS triples. * * @param nodeType the node type//from www . jav a 2s .c om * @throws RepositoryException if repository exception occurred */ public NodeTypeRdfContext(final NodeType nodeType) throws RepositoryException { super(); final Node nodeTypeResource = getResource(nodeType).asNode(); final String nodeTypeName = nodeType.getName(); LOGGER.trace("Adding triples for nodeType: {} with URI: {}", nodeTypeName, nodeTypeResource.getURI()); concat(Collections2.transform(copyOf(nodeType.getDeclaredSupertypes()), new Function<NodeType, Triple>() { @Override public Triple apply(final NodeType input) { final Node supertypeNode; try { supertypeNode = getResource(input).asNode(); LOGGER.trace("Adding triple for nodeType: {} with subclass: {}", nodeTypeName, supertypeNode.getURI()); return create(nodeTypeResource, subClassOf.asNode(), supertypeNode); } catch (final RepositoryException e) { throw propagate(e); } } })); concat(Iterators .concat(Iterators.transform( Iterators.filter(forArray(nodeType.getDeclaredChildNodeDefinitions()), not(isWildcardResidualDefinition)), new NodeDefinitionToTriples(nodeTypeResource)))); concat(Iterators .concat(Iterators.transform( Iterators.filter(forArray(nodeType.getDeclaredPropertyDefinitions()), not(isWildcardResidualDefinition)), new PropertyDefinitionToTriples(nodeTypeResource)))); concat(create(nodeTypeResource, type.asNode(), Class.asNode()), create(nodeTypeResource, label.asNode(), createLiteral(nodeTypeName))); }
From source file:org.gradle.api.internal.tasks.DefaultTaskOutputs.java
@Override public SortedSet<TaskOutputFilePropertySpec> getFileProperties() { if (fileProperties == null) { TaskPropertyUtils.ensurePropertiesHaveNames(filePropertiesInternal); Iterator<TaskOutputFilePropertySpec> flattenedProperties = Iterators .concat(Iterables.transform(filePropertiesInternal, new Function<TaskPropertySpec, Iterator<? extends TaskOutputFilePropertySpec>>() { @Override public Iterator<? extends TaskOutputFilePropertySpec> apply( TaskPropertySpec propertySpec) { if (propertySpec instanceof CompositeTaskOutputPropertySpec) { return ((CompositeTaskOutputPropertySpec) propertySpec) .resolveToOutputProperties(); } else { return Iterators .singletonIterator((TaskOutputFilePropertySpec) propertySpec); }//from www. j a v a2 s.c o m } }).iterator()); fileProperties = TaskPropertyUtils.collectFileProperties("output", flattenedProperties); } return fileProperties; }
From source file:org.apache.mahout.common.iterator.sequencefile.SequenceFileDirValueIterator.java
private void init(FileStatus[] statuses, Comparator<FileStatus> ordering, final boolean reuseKeyValueInstances, final Configuration conf) throws IOException { /*/* w w w . ja va2 s . c o m*/ * prevent NPEs. Unfortunately, Hadoop would return null for list if nothing * was qualified. In this case, which is a corner case, we should assume an * empty iterator, not an NPE. */ if (statuses == null) { statuses = NO_STATUSES; } if (ordering != null) { Arrays.sort(statuses, ordering); } Iterator<FileStatus> fileStatusIterator = Iterators.forArray(statuses); try { Iterator<Iterator<V>> fsIterators = Iterators.transform(fileStatusIterator, new Function<FileStatus, Iterator<V>>() { @Override public Iterator<V> apply(FileStatus from) { try { SequenceFileValueIterator<V> iterator = new SequenceFileValueIterator<V>( from.getPath(), reuseKeyValueInstances, conf); iterators.add(iterator); return iterator; } catch (IOException ioe) { throw new IllegalStateException(from.getPath().toString(), ioe); } } }); Collections.reverse(iterators); // close later in reverse order delegate = Iterators.concat(fsIterators); } finally { /* * prevent file handle leaks in case one of handles fails to open. If some * of the files fail to open, constructor will fail and close() will never * be called. Thus, those handles that did open in constructor, would leak * out, unless we specifically handle it here. */ IOUtils.close(iterators); } }
From source file:org.bugkillers.bus.eventbus.SubscriberRegistry_.java
/** * Gets an iterator representing an immutable snapshot of all subscribers to the given event at * the time this method is called./*from w w w . java 2 s . co m*/ */ Iterator<Subscriber_> getSubscribers(Object event) { ImmutableSet<Class<?>> eventTypes = flattenHierarchy(event.getClass()); List<Iterator<Subscriber_>> subscriberIterators = Lists.newArrayListWithCapacity(eventTypes.size()); for (Class<?> eventType : eventTypes) { CopyOnWriteArraySet<Subscriber_> eventSubscribers = subscribers.get(eventType); if (eventSubscribers != null) { // eager no-copy snapshot subscriberIterators.add(eventSubscribers.iterator()); } } return Iterators.concat(subscriberIterators.iterator()); }
From source file:co.cask.cdap.etl.common.PipelinePhase.java
@Override public Iterator<StageInfo> iterator() { List<Iterator<StageInfo>> iterators = new ArrayList<>(stages.size()); for (Map.Entry<String, Set<StageInfo>> stagesEntry : stages.entrySet()) { iterators.add(stagesEntry.getValue().iterator()); }/*from w ww . j av a2 s . c o m*/ return Iterators.concat(iterators.iterator()); }