Example usage for java.lang Iterable Iterable

Introduction

In this page you can find the example usage for java.lang Iterable Iterable.

Prototype

Iterable

Source Link

Usage

From source file:org.apache.flink.runtime.executiongraph.ExecutionGraph.java

@Override
public Iterable<ExecutionVertex> getAllExecutionVertices() {
    return new Iterable<ExecutionVertex>() {
        @Override// w w w  .  java  2  s .co  m
        public Iterator<ExecutionVertex> iterator() {
            return new AllVerticesIterator(getVerticesTopologically().iterator());
        }
    };
}

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From source file:org.apache.accumulo.shell.Shell.java

public ClassLoader getClassLoader(final CommandLine cl, final Shell shellState) throws AccumuloException,
        TableNotFoundException, AccumuloSecurityException, IOException, FileSystemException {

    boolean tables = cl.hasOption(OptUtil.tableOpt().getOpt()) || !shellState.getTableName().isEmpty();
    boolean namespaces = cl.hasOption(OptUtil.namespaceOpt().getOpt());

    String classpath = null;//from  ww  w. j  av a  2  s  .c om
    Iterable<Entry<String, String>> tableProps;

    if (namespaces) {
        try {
            tableProps = shellState.getConnector().namespaceOperations()
                    .getProperties(OptUtil.getNamespaceOpt(cl, shellState));
        } catch (NamespaceNotFoundException e) {
            throw new IllegalArgumentException(e);
        }
    } else if (tables) {
        tableProps = shellState.getConnector().tableOperations()
                .getProperties(OptUtil.getTableOpt(cl, shellState));
    } else {
        throw new IllegalArgumentException("No table or namespace specified");
    }
    for (Entry<String, String> entry : tableProps) {
        if (entry.getKey().equals(Property.TABLE_CLASSPATH.getKey())) {
            classpath = entry.getValue();
        }
    }

    ClassLoader classloader;

    if (classpath != null && !classpath.equals("")) {
        shellState.getConnector().instanceOperations().getSystemConfiguration()
                .get(Property.VFS_CONTEXT_CLASSPATH_PROPERTY.getKey() + classpath);

        try {
            AccumuloVFSClassLoader.getContextManager().setContextConfig(
                    new ContextManager.DefaultContextsConfig(new Iterable<Map.Entry<String, String>>() {
                        @Override
                        public Iterator<Entry<String, String>> iterator() {
                            try {
                                return shellState.getConnector().instanceOperations().getSystemConfiguration()
                                        .entrySet().iterator();
                            } catch (AccumuloException e) {
                                throw new RuntimeException(e);
                            } catch (AccumuloSecurityException e) {
                                throw new RuntimeException(e);
                            }
                        }
                    }));
        } catch (IllegalStateException ise) {
        }

        classloader = AccumuloVFSClassLoader.getContextManager().getClassLoader(classpath);
    } else {
        classloader = AccumuloVFSClassLoader.getClassLoader();
    }
    return classloader;
}

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From source file:org.apache.jackrabbit.oak.plugins.document.util.Utils.java

/**
 * Wraps the given iterable and aborts iteration over elements when the
 * predicate on an element evaluates to {@code false}.
 *
 * @param iterable the iterable to wrap.
 * @param p the predicate./*  w  w w .ja  v a 2  s . c om*/
 * @return the aborting iterable.
 */
public static <T> Iterable<T> abortingIterable(final Iterable<T> iterable, final Predicate<T> p) {
    checkNotNull(iterable);
    checkNotNull(p);
    return new Iterable<T>() {
        @Override
        public Iterator<T> iterator() {
            final Iterator<T> it = iterable.iterator();
            return new AbstractIterator<T>() {
                @Override
                protected T computeNext() {
                    if (it.hasNext()) {
                        T next = it.next();
                        if (p.apply(next)) {
                            return next;
                        }
                    }
                    return endOfData();
                }
            };
        }
    };
}

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From source file:org.apache.hama.graph.GraphJobRunner.java

public Iterable<Writable> getIterableMessages(final byte[] valuesBytes, final int numOfValues) {

    return new Iterable<Writable>() {
        DataInputStream dis;/*w w w.j av a  2  s .  co  m*/

        @Override
        public Iterator<Writable> iterator() {
            if (!conf.getBoolean("hama.use.unsafeserialization", false)) {
                dis = new DataInputStream(new ByteArrayInputStream(valuesBytes));
            } else {
                dis = new DataInputStream(new UnsafeByteArrayInputStream(valuesBytes));
            }

            return new Iterator<Writable>() {
                int index = 0;

                @Override
                public boolean hasNext() {
                    return (index < numOfValues) ? true : false;
                }

                @Override
                public Writable next() {
                    Writable v = createVertexValue();
                    try {
                        v.readFields(dis);
                    } catch (IOException e) {
                        throw new RuntimeException(e);
                    }
                    index++;
                    return v;
                }

                @Override
                public void remove() {
                }
            };
        }
    };
}

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From source file:uniol.apt.adt.automaton.FiniteAutomatonUtility.java

static private <S extends State> Iterable<S> statesIterable(final S initialState) {
    return new Iterable<S>() {
        @Override// w ww .  j a  va2 s  .  co  m
        public Iterator<S> iterator() {
            final Deque<State> unhandled = new LinkedList<>();
            final Set<State> seen = new HashSet<>();
            unhandled.add(initialState);
            seen.add(initialState);
            return new Iterator<S>() {
                @Override
                public boolean hasNext() {
                    return !unhandled.isEmpty();
                }

                @Override
                public S next() {
                    State state = unhandled.pollFirst();
                    if (state == null)
                        throw new NoSuchElementException();
                    for (State next : state.getFollowingStates(Symbol.EPSILON))
                        if (seen.add(next))
                            unhandled.add(next);
                    for (Symbol symbol : state.getDefinedSymbols())
                        for (State next : state.getFollowingStates(symbol))
                            if (seen.add(next))
                                unhandled.add(next);
                    @SuppressWarnings("unchecked")
                    S ret = (S) state;
                    return ret;
                }

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

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From source file:com.basho.riak.client.RiakObject.java

/**
 * A thread safe, snapshot Iterable view of the state of this RiakObject's {@link RiakLink}s at call time.
 * Modifications are *NOT* supported./*from  w  w  w .  j  ava 2s. c om*/
 * @return Iterable<RiakLink> for this RiakObject's {@link RiakLink}s
 */
public Iterable<RiakLink> iterableLinks() {
    return new Iterable<RiakLink>() {
        public Iterator<RiakLink> iterator() {
            return links.iterator();
        }
    };
}

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From source file:org.apache.sling.resourceresolver.impl.ResourceResolverImpl.java

/**
 * @see org.apache.sling.api.resource.Resource#getChildren()
 *//*from  w w  w  . ja va 2 s  .c  o  m*/
@Override
public Iterable<Resource> getChildren(final Resource parent) {
    return new Iterable<Resource>() {

        @Override
        public Iterator<Resource> iterator() {
            return listChildren(parent);
        }
    };
}

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From source file:com.cloudbees.plugins.credentials.CredentialsProvider.java

/**
 * Returns a lazy {@link Iterable} of all the {@link CredentialsStore} instances contributing credentials to the
 * supplied object./*from  w  w  w .j  a  v  a  2s .  co m*/
 *
 * @param context the {@link Item} or {@link ItemGroup} or {@link User} to get the {@link CredentialsStore}s of.
 * @return a lazy {@link Iterable} of all {@link CredentialsStore} instances.
 * @since 1.8
 */
public static Iterable<CredentialsStore> lookupStores(final ModelObject context) {
    final ExtensionList<CredentialsProvider> providers = all();
    return new Iterable<CredentialsStore>() {
        public Iterator<CredentialsStore> iterator() {
            return new Iterator<CredentialsStore>() {
                private ModelObject current = context;
                private Iterator<CredentialsProvider> iterator = providers.iterator();
                private CredentialsStore next;

                public boolean hasNext() {
                    if (next != null) {
                        return true;
                    }
                    while (current != null) {
                        while (iterator.hasNext()) {
                            CredentialsProvider p = iterator.next();
                            if (!p.isEnabled(context)) {
                                continue;
                            }
                            next = p.getStore(current);
                            if (next != null) {
                                return true;
                            }
                        }
                        // now walk up the model object tree
                        // TODO make this an extension point perhaps ContextResolver could help
                        if (current instanceof Item) {
                            current = ((Item) current).getParent();
                            iterator = providers.iterator();
                        } else if (current instanceof User) {
                            Jenkins jenkins = Jenkins.getActiveInstance();
                            Authentication a;
                            if (jenkins.hasPermission(USE_ITEM) && current == User.current()) {
                                // this is the fast path for the 99% of cases
                                a = Jenkins.getAuthentication();
                            } else {
                                try {
                                    a = ((User) current).impersonate();
                                } catch (UsernameNotFoundException e) {
                                    a = null;
                                }
                            }
                            if (current == User.current() && jenkins.getACL().hasPermission(a, USE_ITEM)) {
                                current = jenkins;
                                iterator = providers.iterator();
                            } else {
                                current = null;
                            }
                        } else if (current instanceof Jenkins) {
                            // escape
                            current = null;
                        } else if (current instanceof ComputerSet) {
                            current = Jenkins.getActiveInstance();
                            iterator = providers.iterator();
                        } else if (current instanceof Computer) {
                            current = Jenkins.getActiveInstance();
                            iterator = providers.iterator();
                        } else if (current instanceof Node) {
                            current = Jenkins.getActiveInstance();
                            iterator = providers.iterator();
                        } else {
                            // fall back to Jenkins as the ultimate parent of everything else
                            current = Jenkins.getActiveInstance();
                            iterator = providers.iterator();
                        }
                    }
                    return false;
                }

                public CredentialsStore next() {
                    if (!hasNext()) {
                        throw new NoSuchElementException();
                    }
                    try {
                        return next;
                    } finally {
                        next = null;
                    }
                }

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

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From source file:org.apache.taverna.scufl2.api.common.Scufl2Tools.java

private <T> Iterable<T> iterable(final Iterator<T> it) {
    return new Iterable<T>() {
        @Override//from  w  ww. j av a  2  s  .c  om
        public Iterator<T> iterator() {
            return it;
        }
    };
}

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From source file:org.nuclos.common.collection.CollectionUtils.java

/**
 * Wraps an Enumeration (often used in older libraries) in an iterable.
 * (Probably every library nowadays has such a wrapper...)
 *
 * @param e the enum//w ww. ja  v a  2s.co m
 * @return an iterable of the same type
 */
public static <T> Iterable<T> iterableEnum(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 UnsupportedOperationException();
                }
            };
        }
    };
}

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