Package org.eclipse.rdf4j.common.iterator

Class Iterators

java.lang.Object
org.eclipse.rdf4j.common.iterator.Iterators
public class Iterators extends Object
This class consists exclusively of static methods that operate on or return iterators. It is the Iterator-equivalent of Collections.

  • Constructor Summary

    Constructors
    Constructor
    Description
    Iterators()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static <E, C extends Collection<E>>
    C
    addAll(Iterator<? extends E> iter, C collection)
    Adds all elements from the supplied iterator to the specified collection.
    static <E> List<E>
    asList(Iterator<? extends E> iter)
    Get a List containing all elements obtained from the specified iterator.
    static void
    close(Iterator<?> iter)
    Closes the given iterator if it implements Closeable else do nothing.
    static void
    closeSilently(Iterator<?> iter)
    Closes the given iterator, swallowing any IOExceptions, if it implements Closeable else do nothing.
    static String
    toString(Iterator<?> iter, String separator)
    Converts an iterator to a string by concatenating all of the string representations of objects in the iterator, divided by a separator.
    static void
    toString(Iterator<?> iter, String separator, StringBuilder sb)
    Converts an iterator to a string by concatenating all of the string representations of objects in the iterator, divided by a separator.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • Iterators

      public Iterators()

  • Method Details

    • asList

      public static <E> List<E> asList(Iterator<? extends E> iter)
      Get a List containing all elements obtained from the specified iterator.
      Parameters:
      iter - the iterator to get the elements from
      Returns:
      a List containing all elements obtained from the specified iterator.

    • addAll

      public static <E, C extends Collection<E>> C addAll(Iterator<? extends E> iter, C collection)
      Adds all elements from the supplied iterator to the specified collection.
      Parameters:
      iter - An iterator containing elements to add to the container.
      collection - The collection to add the elements to.
      Returns:
      The collection object that was supplied to this method.

    • toString

      public static String toString(Iterator<?> iter, String separator)
      Converts an iterator to a string by concatenating all of the string representations of objects in the iterator, divided by a separator.
      Parameters:
      iter - An iterator over arbitrary objects that are expected to implement Object.toString().
      separator - The separator to insert between the object strings.
      Returns:
      A String representation of the objects provided by the supplied iterator.

    • toString

      public static void toString(Iterator<?> iter, String separator, StringBuilder sb)
      Converts an iterator to a string by concatenating all of the string representations of objects in the iterator, divided by a separator.
      Parameters:
      iter - An iterator over arbitrary objects that are expected to implement Object.toString().
      separator - The separator to insert between the object strings.
      sb - A StringBuilder to append the iterator string to.

    • close

      public static void close(Iterator<?> iter) throws IOException
      Closes the given iterator if it implements Closeable else do nothing.
      Parameters:
      iter - The iterator to close.
      Throws:
      IOException - If an underlying I/O error occurs.

    • closeSilently

      public static void closeSilently(Iterator<?> iter)
      Closes the given iterator, swallowing any IOExceptions, if it implements Closeable else do nothing.
      Parameters:
      iter - The iterator to close.