Package org.eclipse.jetty.util

Class ArrayTrie<V>

java.lang.Object
org.eclipse.jetty.util.AbstractTrie<V>
org.eclipse.jetty.util.ArrayTrie<V>
Type Parameters:
V - the entry type
All Implemented Interfaces:
Trie<V>
@Deprecated(since="2021-05-27") public class ArrayTrie<V> extends AbstractTrie<V>
Deprecated.
The Eclipse Jetty and Apache Felix Http Jetty packages are no longer supported.

A Trie String lookup data structure using a fixed size array.

This implementation is always case insensitive and is optimal for a small number of fixed strings with few special characters. The Trie is stored in an array of lookup tables, each indexed by the next character of the key. Frequently used characters are directly indexed in each lookup table, whilst infrequently used characters must use a big character table.

This Trie is very space efficient if the key characters are from ' ', '+', '-', ':', ';', '.', 'A' to 'Z' or 'a' to 'z'. Other ISO-8859-1 characters can be used by the key, but less space efficiently.

This Trie is not Threadsafe and contains no mutual exclusion or deliberate memory barriers. It is intended for an ArrayTrie to be built by a single thread and then used concurrently by multiple threads and not mutated during that access. If concurrent mutations of the Trie is required external locks need to be applied.

  • Constructor Details

    • ArrayTrie

      public ArrayTrie()
      Deprecated.

    • ArrayTrie

      public ArrayTrie(int capacity)
      Deprecated.
      Parameters:
      capacity - The capacity of the trie, which at the worst case is the total number of characters of all keys stored in the Trie. The capacity needed is dependent of the shared prefixes of the keys. For example, a capacity of 6 nodes is required to store keys "foo" and "bar", but a capacity of only 4 is required to store "bar" and "bat".

  • Method Details

    • clear

      public void clear()
      Deprecated.

    • put

      public boolean put(String s, V v)
      Deprecated.
      Description copied from interface: Trie
      Put an entry into the Trie
      Parameters:
      s - The key for the entry
      v - The value of the entry
      Returns:
      True if the Trie had capacity to add the field.

    • get

      public V get(String s, int offset, int len)
      Deprecated.
      Description copied from interface: Trie
      Get an exact match from a String key
      Parameters:
      s - The key
      offset - The offset within the string of the key
      len - the length of the key
      Returns:
      the value for the string / offset / length

    • get

      public V get(ByteBuffer b, int offset, int len)
      Deprecated.
      Description copied from interface: Trie
      Get an exact match from a segment of a ByteBuufer as key
      Parameters:
      b - The buffer
      offset - The offset within the buffer of the key
      len - the length of the key
      Returns:
      The value or null if not found

    • getBest

      public V getBest(byte[] b, int offset, int len)
      Deprecated.
      Description copied from interface: Trie
      Get the best match from key in a byte array. The key is assumed to by ISO_8859_1 characters.
      Specified by:
      getBest in interface Trie<V>
      Overrides:
      getBest in class AbstractTrie<V>
      Parameters:
      b - The buffer
      offset - The offset within the array of the key
      len - the length of the key
      Returns:
      The value or null if not found

    • getBest

      public V getBest(ByteBuffer b, int offset, int len)
      Deprecated.
      Description copied from interface: Trie
      Get the best match from key in a byte buffer. The key is assumed to by ISO_8859_1 characters.
      Parameters:
      b - The buffer
      offset - The offset within the buffer of the key
      len - the length of the key
      Returns:
      The value or null if not found

    • getBest

      public V getBest(String s, int offset, int len)
      Deprecated.
      Description copied from interface: Trie
      Get the best match from key in a String.
      Parameters:
      s - The string
      offset - The offset within the string of the key
      len - the length of the key
      Returns:
      The value or null if not found

    • toString

      public String toString()
      Deprecated.
      Overrides:
      toString in class Object

    • keySet

      public Set<String> keySet()
      Deprecated.

    • isFull

      public boolean isFull()
      Deprecated.