Package com.thebuzzmedia.exiftool.commons.iterables

Class Collections

  • public final class Collections
extends Object
    Static Collection Utilities.

    • Method Detail

      • isEmpty

        public static <T> boolean isEmpty​(Collection<T> values)
        Check if collection is empty (null or empty).
        Type Parameters:
        T - Type of element in collection.
        Parameters:
        values - Collection of values.
        Returns:
        true if collection is empty (null or empty), false otherwise.

      • isNotEmpty

        public static <T> boolean isNotEmpty​(Collection<T> values)
        Check if collection is not empty (not null and not empty).
        Type Parameters:
        T - Type of element in collection.
        Parameters:
        values - Collection of values.
        Returns:
        true if collection is not empty (not null and not empty), false otherwise.

      • size

        public static <T> int size​(Collection<T> values)
        Get size of collection. If collection is empty (null or empty), zero will be returned.
        Type Parameters:
        T - Type of element in collection.
        Parameters:
        values - Collection of values.
        Returns:
        Size of collection.

      • toCollection

        public static <T> Collection<T> toCollection​(Iterable<T> iterables)
        Create in memory collection from given iterable elements.
        • If iterables is null, an empty array list is returned.
        • If iterables is already an instance of Collection, it is returned.
        • Otherwise, iterable structure is iterated and loaded into an ArrayList.
        Type Parameters:
        T - Type of element in iterable structure.
        Parameters:
        iterables - Given iterable.
        Returns:
        The collection result.

      • join

        public static <T> String join​(Collection<T> values,
                              String separator)
        Join elements of collection to a final string. If collection is empty (null or empty), an empty string is returned.
        Type Parameters:
        T - Type of element in collection.
        Parameters:
        values - Collection of values.
        separator - Separator, use to separate each elements.
        Returns:
        Final string.

      • map

        public static <T,​U> List<U> map​(Collection<T> inputs,
                                      Mapper<T,​U> mapper)
        Map list of inputs to a new list of outputs.
        Type Parameters:
        T - Type of input.
        U - Type of output.
        Parameters:
        inputs - Input list.
        mapper - Mapper used to transform inputs.
        Returns:
        New list of outputs.

      • addAll

        public static <T> void addAll​(Collection<T> collection,
                              Iterable<T> iterable)
        Add all elements of given iterable structure to given collection.
        Type Parameters:
        T - Type of elements.
        Parameters:
        collection - The collection.
        iterable - The iterable structure.