Package org.apache.pekko.protobuf

Class LazyStringArrayList

  • All Implemented Interfaces:
    java.lang.Iterable<java.lang.String>, java.util.Collection<java.lang.String>, java.util.List<java.lang.String>, java.util.RandomAccess, LazyStringList
    public class LazyStringArrayList
extends java.util.AbstractList<java.lang.String>
implements LazyStringList, java.util.RandomAccess
    An implementation of LazyStringList that wraps an ArrayList. Each element is either a ByteString or a String. It caches the last one requested which is most likely the one needed next. This minimizes memory usage while satisfying the most common use cases.

    Note that this implementation is not synchronized. If multiple threads access an ArrayList instance concurrently, and at least one of the threads modifies the list structurally, it must be synchronized externally. (A structural modification is any operation that adds or deletes one or more elements, or explicitly resizes the backing array; merely setting the value of an element is not a structural modification.) This is typically accomplished by synchronizing on some object that naturally encapsulates the list.

    If the implementation is accessed via concurrent reads, this is thread safe. Conversions are done in a thread safe manner. It's possible that the conversion may happen more than once if two threads attempt to access the same element and the modifications were not visible to each other, but this will not result in any corruption of the list or change in behavior other than performance.

    • Field Summary

      Fields 
      Modifier and Type Field Description
      static LazyStringList EMPTY  

      • Fields inherited from class java.util.AbstractList

        modCount

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void add​(int index, java.lang.String element)  
      void add​(ByteString element)
      Appends the specified element to the end of this list (optional operation).
      boolean addAll​(int index, java.util.Collection<? extends java.lang.String> c)  
      boolean addAll​(java.util.Collection<? extends java.lang.String> c)  
      void clear()  
      java.lang.String get​(int index)  
      ByteString getByteString​(int index)
      Returns the element at the specified position in this list as a ByteString.
      java.util.List<?> getUnderlyingElements()
      Returns an unmodifiable List of the underlying elements, each of which is either a String or its equivalent UTF-8 encoded ByteString.
      java.lang.String remove​(int index)  
      java.lang.String set​(int index, java.lang.String s)  
      int size()  

      • Methods inherited from class java.util.AbstractList

        add, equals, hashCode, indexOf, iterator, lastIndexOf, listIterator, listIterator, removeRange, subList

      • Methods inherited from class java.util.AbstractCollection

        contains, containsAll, isEmpty, remove, removeAll, retainAll, toArray, toArray, toString

      • Methods inherited from class java.lang.Object

        clone, finalize, getClass, notify, notifyAll, wait, wait, wait

      • Methods inherited from interface java.util.Collection

        parallelStream, removeIf, stream, toArray

      • Methods inherited from interface java.lang.Iterable

        forEach

      • Methods inherited from interface java.util.List

        add, contains, containsAll, equals, hashCode, indexOf, isEmpty, iterator, lastIndexOf, listIterator, listIterator, remove, removeAll, replaceAll, retainAll, sort, spliterator, subList, toArray, toArray

    • Constructor Detail

      • LazyStringArrayList

        public LazyStringArrayList()

      • LazyStringArrayList

        public LazyStringArrayList​(LazyStringList from)

      • LazyStringArrayList

        public LazyStringArrayList​(java.util.List<java.lang.String> from)

    • Method Detail

      • get

        public java.lang.String get​(int index)
        Specified by:
        get in interface java.util.List<java.lang.String>
        Specified by:
        get in class java.util.AbstractList<java.lang.String>

      • size

        public int size()
        Specified by:
        size in interface java.util.Collection<java.lang.String>
        Specified by:
        size in interface java.util.List<java.lang.String>
        Specified by:
        size in class java.util.AbstractCollection<java.lang.String>

      • set

        public java.lang.String set​(int index,
                            java.lang.String s)
        Specified by:
        set in interface java.util.List<java.lang.String>
        Overrides:
        set in class java.util.AbstractList<java.lang.String>

      • add

        public void add​(int index,
                java.lang.String element)
        Specified by:
        add in interface java.util.List<java.lang.String>
        Overrides:
        add in class java.util.AbstractList<java.lang.String>

      • addAll

        public boolean addAll​(java.util.Collection<? extends java.lang.String> c)
        Specified by:
        addAll in interface java.util.Collection<java.lang.String>
        Specified by:
        addAll in interface java.util.List<java.lang.String>
        Overrides:
        addAll in class java.util.AbstractCollection<java.lang.String>

      • addAll

        public boolean addAll​(int index,
                      java.util.Collection<? extends java.lang.String> c)
        Specified by:
        addAll in interface java.util.List<java.lang.String>
        Overrides:
        addAll in class java.util.AbstractList<java.lang.String>

      • remove

        public java.lang.String remove​(int index)
        Specified by:
        remove in interface java.util.List<java.lang.String>
        Overrides:
        remove in class java.util.AbstractList<java.lang.String>

      • clear

        public void clear()
        Specified by:
        clear in interface java.util.Collection<java.lang.String>
        Specified by:
        clear in interface java.util.List<java.lang.String>
        Overrides:
        clear in class java.util.AbstractList<java.lang.String>

      • add

        public void add​(ByteString element)
        Description copied from interface: LazyStringList
        Appends the specified element to the end of this list (optional operation).
        Specified by:
        add in interface LazyStringList
        Parameters:
        element - element to be appended to this list

      • getByteString

        public ByteString getByteString​(int index)
        Description copied from interface: LazyStringList
        Returns the element at the specified position in this list as a ByteString.
        Specified by:
        getByteString in interface LazyStringList
        Parameters:
        index - index of the element to return
        Returns:
        the element at the specified position in this list

      • getUnderlyingElements

        public java.util.List<?> getUnderlyingElements()
        Description copied from interface: LazyStringList
        Returns an unmodifiable List of the underlying elements, each of which is either a String or its equivalent UTF-8 encoded ByteString. It is an error for the caller to modify the returned List, and attempting to do so will result in an UnsupportedOperationException.
        Specified by:
        getUnderlyingElements in interface LazyStringList