Package org.openprovenance.prov.template.compiler.sql

Class Collections

java.lang.Object
org.openprovenance.prov.template.compiler.sql.Collections
public class Collections extends Object
Provides static utility methods for working with collections.

  • Method Details

    • listOf

      @SafeVarargs public static <E> List<E> listOf(E... elements)
      Creates an immutable list of elements.
      Type Parameters:
      E - The element type.
      Parameters:
      elements - The list elements.
      Returns:
      An immutable list containing the provided elements.

    • mapOf

      @SafeVarargs public static <K, V> Map<K,V> mapOf(Map.Entry<K,V>... entries)
      Creates an immutable map of entries.
      Type Parameters:
      K - The key type.
      V - The value type.
      Parameters:
      entries - The map entries.
      Returns:
      An immutable map containing the provided entries.

    • entry

      public static <K, V> Map.Entry<K,V> entry(K key, V value)
      Creates an immutable map entry.
      Type Parameters:
      K - The key type.
      V - The value type.
      Parameters:
      key - The entry key.
      value - The entry value.
      Returns:
      An immutable map entry containing the provided key/value pair.

    • emptyListOf

      public static <E> List<E> emptyListOf(Class<E> elementType)
      Returns an empty list.
      Type Parameters:
      E - The element type.
      Parameters:
      elementType - The element type.
      Returns:
      An empty list.

    • emptyMapOf

      public static <K, V> Map<K,V> emptyMapOf(Class<K> keyType, Class<V> valueType)
      Returns an empty map.
      Type Parameters:
      K - The key type.
      V - The value type.
      Parameters:
      keyType - The key type.
      valueType - The value type.
      Returns:
      An empty map.

    • firstIndexWhere

      public static <E> int firstIndexWhere(List<E> list, Predicate<E> predicate)
      Returns the index of the first element in a list that matches the given predicate.
      Type Parameters:
      E - The element type.
      Parameters:
      list - The list of elements.
      predicate - The predicate.
      Returns:
      The index of the first matching element, or -1 if no match was found.

    • lastIndexWhere

      public static <E> int lastIndexWhere(List<E> list, Predicate<E> predicate)
      Returns the index of the last element in a list that matches the given predicate.
      Type Parameters:
      E - The element type.
      Parameters:
      list - The list of elements.
      predicate - The predicate.
      Returns:
      The index of the last matching element, or -1 if no match was found.

    • valueAt

      public static Object valueAt(Object root, Object... path)
      Returns the value at a given path.
      Parameters:
      root - The root object.
      path - The path to the value.
      Returns:
      The value at the given path, or null if the value does not exist.