Package org.apache.commons.compress.harmony.unpack200

# Class SegmentConstantPoolArrayCache.CachedArray

java.lang.Object
org.apache.commons.compress.harmony.unpack200.SegmentConstantPoolArrayCache.CachedArray

Enclosing class:
  SegmentConstantPoolArrayCache

protected class SegmentConstantPoolArrayCache.CachedArray extends Object
Keeps track of the last known size of an array as well as a HashMap that knows the mapping from element values to the indices of the array which contain that value.

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `CachedArray(String[] array)`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `protected void`
  `cacheIndexes()`
  Given a primaryArray, cache its values in a HashMap to provide a backwards mapping from element values to element indexes.
  `List<Integer>`
  `indexesForKey(String key)`
  Given a particular key, answer a List of index locations in the array which contain that key.
  `int`
  `lastKnownSize()`
  Answer the last known size of the array cached.

  ### Methods inherited from class java.lang.Object

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

- ## Constructor Details

  - ### CachedArray

    public CachedArray(String[] array)

- ## Method Details

  - ### cacheIndexes

    protected void cacheIndexes()
    Given a primaryArray, cache its values in a HashMap to provide a backwards mapping from element values to element indexes. For instance, a primaryArray of: {"Zero", "Foo", "Two", "Foo"} would yield a HashMap of: "Zero" -> 0 "Foo" -> 1, 3 "Two" -> 2 which is then cached.

  - ### indexesForKey

    public List<Integer> indexesForKey(String key)
    Given a particular key, answer a List of index locations in the array which contain that key. If no elements are found, answer an empty list.
    Parameters:
      `key` - String element of the array
    Returns:
      List of indexes containing that key in the array.

  - ### lastKnownSize

    public int lastKnownSize()
    Answer the last known size of the array cached. If the last known size is not the same as the current size, the array must have changed.
    Returns:
      int last known size of the cached array