コード例 #1
0
 /**
  * Construct a new vector from the contents of a map. The key domain is the key set of the map.
  * Therefore, no new keys can be added to this vector.
  *
  * @param keyValueMap A map providing the values for the vector.
  */
 SparseVector(Long2DoubleMap keyValueMap) {
   keys = LongKeyDomain.fromCollection(keyValueMap.keySet(), true);
   final int len = keys.domainSize();
   values = new double[len];
   for (int i = 0; i < len; i++) {
     values[i] = keyValueMap.get(keys.getKey(i));
   }
 }
コード例 #2
0
  /**
   * Check whether an entry is set.
   *
   * @param entry The entry.
   * @return {@code true} if the entry is set in this vector.
   * @throws IllegalArgumentException if the entry is not from this vector or another vector sharing
   *     the same key domain. Only vectors and their side channels share key domains for the
   *     purposes of this check.
   */
  public boolean isSet(VectorEntry entry) {
    final SparseVector evec = entry.getVector();
    final int eind = entry.getIndex();

    if (evec == null) {
      throw new IllegalArgumentException("entry is not associated with a vector");
    } else if (!keys.isCompatibleWith(evec.keys)) {
      throw new IllegalArgumentException("entry does not have safe key domain");
    }
    assert entry.getKey() == keys.getKey(eind);
    return keys.indexIsActive(eind);
  }
コード例 #3
0
  /**
   * Get the value for the entry's key.
   *
   * @param entry A {@code VectorEntry} with the key to look up
   * @return the key's value
   * @throws IllegalArgumentException if the entry is unset, or if it is not from this vector or
   *     another vector sharing the same key domain. Only vectors and their side channels share key
   *     domains for the purposes of this check.
   */
  public double get(VectorEntry entry) {
    final SparseVector evec = entry.getVector();
    final int eind = entry.getIndex();

    if (evec == null) {
      throw new IllegalArgumentException("entry is not associated with a vector");
    } else if (!evec.keys.isCompatibleWith(keys)) {
      throw new IllegalArgumentException("entry does not have safe key domain");
    }
    assert entry.getKey() == keys.getKey(eind);
    if (keys.indexIsActive(eind)) {
      return values[eind];
    } else {
      throw new IllegalArgumentException("Key " + entry.getKey() + " is not set");
    }
  }