com.google.appengine.api.files.dev
Class BlobstoreFile

java.lang.Object
  com.google.appengine.api.files.dev.FileMetadata
      com.google.appengine.api.files.dev.BlobstoreFile

public class BlobstoreFile
extends FileMetadata

Represents a file in the local file service that is stored in the BlobStore. For each BlobStore file there are two instances of this class: one corresponding to the creation-handle which is write-only, and one corresponding to the blob key which is read-only. Each instance will eventually contain both the creation handle and the blob key Strings so that it is possible to find one from the other.

Nested Class Summary

Nested classes/interfaces inherited from class com.google.appengine.api.files.dev.FileMetadata

FileMetadata.LockState, FileMetadata.OpenState

Field Summary

static java.lang.String	CREATION_HANDLE_PREFIX
static java.lang.String	FILE_SYSTEM

Fields inherited from class com.google.appengine.api.files.dev.FileMetadata

contentType, finalized

Method Summary

void	append(AppendRequest request) Handle an append request
static java.lang.String	buildFullPath(java.lang.String namePart)
static boolean	isSpecialReadOnlyName(ParsedFileName parsedName)
static FileMetadata	newInstance(LocalFileService localFileService, ParsedFileName parsedName, OpenMode openMode, ContentType contentType, java.util.Map<java.lang.String,java.lang.String> parameters) Creates a new instance.
ByteString	read(ReadRequest request) Handle a Read request
void	setFinalized()

Methods inherited from class com.google.appengine.api.files.dev.FileMetadata

getContentType, getLockState, getOpenState, isFinalized, isOpenInDifferentSession, lock, setState

Methods inherited from class java.lang.Object

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

Field Detail

FILE_SYSTEM

public static final java.lang.String FILE_SYSTEM

CREATION_HANDLE_PREFIX

public static final java.lang.String CREATION_HANDLE_PREFIX

See Also:

Constant Field Values

Method Detail

buildFullPath

public static java.lang.String buildFullPath(java.lang.String namePart)

isSpecialReadOnlyName

public static boolean isSpecialReadOnlyName(ParsedFileName parsedName)

newInstance

public static FileMetadata newInstance(LocalFileService localFileService,
                                       ParsedFileName parsedName,
                                       OpenMode openMode,
                                       ContentType contentType,
                                       java.util.Map<java.lang.String,java.lang.String> parameters)

Creates a new instance. There are two cases: 1) A create request 2) A read request for a special read-only file.

append

public void append(AppendRequest request)

Description copied from class: FileMetadata

Handle an append request

Specified by:

append in class FileMetadata

Parameters:

request - the request

setFinalized

public void setFinalized()

Overrides:

setFinalized in class FileMetadata

read

public ByteString read(ReadRequest request)

Description copied from class: FileMetadata

Handle a Read request

Specified by:

read in class FileMetadata

Parameters:

request - the request

Returns:

A ByteString containing the read bytes