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}

        "v7files.content");
    ContentStorage storage = new MongoContentStorage(contents);


    byte[] data = "abcdefghijklmnopqrstuvwxyz".getBytes();


    ContentPointer pointer = storage.storeContent(new ByteArrayInputStream(
        data));


    DBCollection references = mongo.getDB("test").getCollection(
        "v7files.refs");
    ReferenceTracking refs = new MongoReferenceTracking(references);

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      ZipException, DecoderException {


    ContentStorage storage = new MongoContentStorage(getMongo().getDB(
        "test"));


    ContentPointer zip = storage.storeContent(getClass()
        .getResourceAsStream("mongodb.epub"));


    ContentPointer png = ZipFile.extractFile(storage, zip,
        "images/img0.png");


    assertEquals("fc012bb0439382f709d3caebab958ff592811d17", DigestUtils
        .shaHex(storage.getContent(png).getInputStream()));

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      ZipException, DecoderException {


    ContentStorage storage = new MongoContentStorage(getMongo().getDB(
        "test"));


    ContentPointer zip = storage.storeContent(getClass()
        .getResourceAsStream("mongodb.epub"));


    ZipFile.index(storage, zip);


    assertEquals("fc012bb0439382f709d3caebab958ff592811d17", DigestUtils

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    ContentStorage storage = new MongoContentStorage(mongo.getDB("test")
        .getCollection("v7files.content"));


    byte[] data = "abcdefghijklmnopqrstuvwxyz".getBytes();


    ContentPointer pointer = storage.storeContent(new ByteArrayInputStream(
        data));
    Content check = storage.getContent(pointer);


    assertEquals(new String(data), IOUtils.toString(check.getInputStream()));
    assertEquals(data.length, check.getLength());

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    Mongo mongo = getMongo();
    MongoContentStorage storage = new MongoContentStorage(mongo
        .getDB("test"));


    ContentPointer pointer = storage.storeContent(new ByteArrayInputStream(
        data));


    BSONObject doc = assertMockMongoContainsDocument(
        "test.v7files.content", sha);
    assertEquals("cat", doc.get("store"));

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      refTracking.updateReferences(fileId);
      return makeMetaData(filename, contentType, null);


    }


    ContentPointer p = storage.storeContent(new ByteArrayInputStream(data,
        offset, len));


    refTracking.updateReferences(fileId, p);


    return makeMetaData(filename, contentType, p);

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    if (data == null)
      return insertContentsAndBackRefs(null, 0, 0, fileId, filename,
          contentType);


    ContentPointer p = storage.storeContent(data);


    refTracking.updateReferences(fileId, p);


    return makeMetaData(filename, contentType, p);

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        : contents.length);
  }


  void updateContents(DBObject metaData, ContentPointer newContents)
      throws IOException {
    ContentPointer oldContents = getContentPointer(metaData);


    if (newContents.contentEquals(oldContents))
      return;


    String filename = (String) metaData.get("filename");

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  private void updateContents(DBObject metaData, InputStream contents)
      throws IOException {


    Object fileId = metaData.get("_id");
    ContentPointer oldContents = getContentPointer(metaData);
    String filename = (String) metaData.get("filename");
    String contentType = (String) metaData.get("contentType");


    BSONObject newContent = storage.insertContentsAndBackRefs(contents,
        fileId, filename, contentType);


    // check if it has changed
    ContentPointer newContents = getContentPointer(newContent);
    if (newContents.contentEquals(oldContents))
      return;


    metaData.removeField("sha");
    metaData.removeField("length");
    metaData.removeField("in");

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  private void updateContents(DBObject metaData, byte[] contents, int offset,
      int len) throws IOException {


    Object fileId = metaData.get("_id");
    ContentPointer oldContents = getContentPointer(metaData);
    String filename = (String) metaData.get("filename");
    String contentType = (String) metaData.get("contentType");


    // for up to 55 bytes, storing the complete file inline
    // takes less space than just storing the SHA-1 and length
    // 20 (SHA-1) + 1 (sha - in) + 6 (length) + 4 (int32) + 2*12
    // (ObjectId back-references)
    BSONObject newContent = storage.inlineOrInsertContentsAndBackRefs(55,
        contents, offset, len, fileId, filename, contentType);


    // check if it has changed
    ContentPointer newContents = getContentPointer(newContent);
    if (newContents.contentEquals(oldContents))
      return;


    metaData.removeField("sha");
    metaData.removeField("length");
    metaData.removeField("in");

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Related Classes of v7db.files.spi.ContentPointer

v7db.files.ContentStorageFacade

v7db.files.mongodb.MongoContentStorageTest

v7db.files.mongodb.MongoReferenceTrackingTest

v7db.files.mongodb.V7File

v7db.files.mongodb.V7GridFS

v7db.files.ZipFileTest

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