Examples of v7db.files.spi.ContentPointer

v7db.files.spi.ContentPointer
A ContentPointer describes how a piece of content is stored, either (for very small data) inlined into the pointer, or inside of the ContentStorage, referenced by a SHA-1 digest (or the content itself or another piece of content that contains it).
ContentPointers are how you interact with the ContentStorage system: When you store some data, you are given a ContentPointer. Hold on to that ContentPointer (can be serialized as a BSON document) to later retrieve your data. @see {@link InlineContent}, {@link StoredContent}

  ContentPointer getContentPointer(BSONObject metaData) {
    return storage.getContentPointer(metaData);
  }


  Content getContent(BSONObject metaData) throws IOException {
    ContentPointer pointer = storage.getContentPointer(metaData);
    return storage.getContent(pointer);
  }

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  public boolean hasContent() {
    return getContentPointer() != null;
  }


  public Long getLength() {
    ContentPointer p = getContentPointer();
    if (p == null)
      return null;
    return p.getLength();
  }

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      return null;
    return p.getLength();
  }


  public String getDigest() {
    ContentPointer contentPointer = getContentPointer();
    if (contentPointer instanceof ContentSHA) {
      return ((ContentSHA) contentPointer).getDigest();
    }
    if (contentPointer instanceof InlineContent) {
      try {
        return DigestUtils.shaHex(((InlineContent) contentPointer)
            .getInputStream());
      } catch (IOException e) {
        throw new RuntimeException(e);
      }
    }
    if (contentPointer.getLength() == 0)
      return ContentSHA.calculate(ArrayUtils.EMPTY_BYTE_ARRAY)
          .getDigest();


    // TODO:
    System.err.println("NO DIGEST!");

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