Class StrLazy

basex-core/src/main/java/org/basex/query/value/item/StrLazy.java:20–142

Lazy string item (xs:string). @author BaseX Team, BSD License @author Christian Gruen

 * @author Christian Gruen
 */
public final class StrLazy extends AStr implements Lazy {
  /** Input reference. */
  private final IO input;
  /** Encoding (can be {@code null}). */
  private final String encoding;
  /** Error message. */
  private final QueryError error;
  /** Replace invalid input with Unicode replacement character. */
  private final boolean fallback;
  /** Caching flag. */
  private boolean cache;

  /**
   * Constructor.
   * @param input input
   * @param encoding encoding (can be {@code null})
   * @param error error message to be thrown
   * @param fallback fallback flag
   */
  public StrLazy(final IO input, final String encoding, final QueryError error,
      final boolean fallback) {
    this.input = input;
    this.encoding = encoding;
    this.error = error;
    this.fallback = fallback;
  }

  @Override
  public byte[] string(final InputInfo ii) throws QueryException {
    cache(ii);
    return value;
  }

  @Override
  public String toJava() throws QueryException {
    return Token.string(string(null));
  }

  @Override
  public TextInput stringInput(final InputInfo ii) throws IOException, QueryException {
    if(cache) cache(ii);
    return isCached() ? super.stringInput(ii) : get(ii);
  }

  @Override
  public void cache(final  boolean lazy, final InputInfo ii) throws QueryException {
    if(lazy) cache = true;
    else cache(ii);
  }

  @Override
  public void cache(final InputInfo ii) throws QueryException {
    try {
      if(!isCached()) value = get(ii).content();
    } catch(final IOException ex) {
      Util.debug(ex);
      throw error.get(ii,  input);
    }