Example usage for java.lang Iterable getClass

Introduction

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

Prototype

@HotSpotIntrinsicCandidate
public final native Class<?> getClass();

Source Link

Document

Returns the runtime class of this Object .

Usage

From source file:com.antsdb.saltedfish.sql.ExternalTable.java

public static <T> ExternalTable wrap(Orca orca, String namespace, Class<T> klass, Iterable<T> iterable) {
    ClassBasedTable<T> table = new ClassBasedTable<>();
    table.source = iterable;/*from  w  w w  .j a  v a 2 s. com*/
    table.meta.setNamespace(namespace).setTableName(iterable.getClass().getSimpleName());
    List<ColumnMeta> columns = new ArrayList<>();
    for (Field i : klass.getFields()) {
        ColumnMeta column = new ColumnMeta(orca.getTypeFactory(), new SlowRow(0));
        column.setColumnName(i.getName()).setId(table.meta.getColumns().size());
        if (i.getType() == String.class) {
            column.setType(DataType.varchar());
        } else if (i.getType() == int.class) {
            column.setType(DataType.integer());
        } else if (i.getType() == long.class) {
            column.setType(DataType.longtype());
        } else {
            throw new NotImplementedException();
        }
        columns.add(column);
        table.fields.add(i);
    }
    table.meta.setColumns(columns);
    return table;
}

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From source file:com.bitranger.parknshop.common.recommend.collections.CollectionUtils.java

@SuppressWarnings({ "unchecked", "rawtypes" })
public static <E> Iterable<E> fast(final Iterable<E> iter) {
    if (iter instanceof FastIterable) {
        return new Iterable<E>() {
            @Override//from  w  w w. j ava  2  s  . com
            public Iterator<E> iterator() {
                return ((FastIterable) iter).fastIterator();
            }
        };
    } else if (iter instanceof Cursor) {
        throw new IllegalArgumentException();
    } else {
        Optional<Method> fastMethod = fastIteratorMethods.getUnchecked(iter.getClass());
        if (fastMethod.isPresent()) {
            final Method method = fastMethod.get();
            return new Iterable<E>() {
                @Override
                public Iterator<E> iterator() {
                    try {
                        return (Iterator<E>) method.invoke(iter);
                    } catch (IllegalAccessException e) {
                        return iter.iterator();
                    } catch (InvocationTargetException e) {
                        throw Throwables.propagate(e.getCause());
                    }
                }
            };
        } else {
            return iter;
        }
    }
}

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From source file:net.orfjackal.retrolambda.test.DefaultMethodsTest.java

/**
 * We're unable to backport default methods if we cannot modify the interface,
 * e.g. if it's part of the standard library or a third-party library.
 *//*  w w  w.  j  a  v  a  2s  . co m*/
@Test
public void default_methods_of_library_interfaces_are_ignored_silently() throws Exception {
    @SuppressWarnings("unchecked")
    Iterator<String> dummy = mock(Iterator.class);

    // the Iterable interface has default methods in Java 8, but that
    // should not prevent us from using it in previous Java versions
    Iterable<String> it = new Iterable<String>() {
        @Override
        public Iterator<String> iterator() {
            return dummy;
        }
    };

    assertThat("interface should work as usual", it.iterator(), is(dummy));
    assertThat("should not copy default methods from library interfaces", it.getClass().getDeclaredMethods(),
            arrayWithSize(1));
}

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From source file:org.grouplens.lenskit.collections.CollectionUtils.java

/**
 * Use the fast iterator of an iterable, if available.
 *
 * @param <E>  The type of object to iterate.
 * @param iter An iterable to wrap/*from w w  w .  j a v  a 2s. c o m*/
 * @return An iterable using the underlying iterable's fast iterator, if present,
 *         to do iteration. Fast iteration is detected by looking for a {@code fastIterator()}
 *         method, like is present in {@link FastEntrySet}.
 */
@SuppressWarnings({ "unchecked", "rawtypes" })
public static <E> Iterable<E> fast(final Iterable<E> iter) {
    if (iter instanceof FastIterable) {
        return new Iterable<E>() {
            @Override
            public Iterator<E> iterator() {
                return ((FastIterable) iter).fastIterator();
            }
        };
    } else if (iter instanceof Cursor) {
        return ((Cursor<E>) iter).fast();
    } else {
        Optional<Method> fastMethod = fastIteratorMethods.getUnchecked(iter.getClass());
        if (fastMethod.isPresent()) {
            final Method method = fastMethod.get();
            return new Iterable<E>() {
                @Override
                public Iterator<E> iterator() {
                    try {
                        return (Iterator<E>) method.invoke(iter);
                    } catch (IllegalAccessException e) {
                        return iter.iterator();
                    } catch (InvocationTargetException e) {
                        throw Throwables.propagate(e.getCause());
                    }
                }
            };
        } else {
            return iter;
        }
    }
}

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