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java.lang.Objectorg.apache.commons.vfs2.provider.AbstractFileObject
org.apache.commons.vfs2.provider.ram.RamFileObject
public class RamFileObject
A RAM File contains a single RAM FileData instance, it provides methods to access the data by implementing FileObject interface.
Constructor Summary | |
---|---|
protected |
RamFileObject(AbstractFileName name,
RamFileSystem fs)
|
Method Summary | |
---|---|
protected void |
doAttach()
Attaches this file object to its file resource. |
protected void |
doCreateFolder()
Creates this file as a folder. |
protected void |
doDelete()
Deletes the file. |
protected long |
doGetContentSize()
Returns the size of the file content (in bytes). |
protected java.io.InputStream |
doGetInputStream()
Creates an input stream to read the file content from. |
protected long |
doGetLastModifiedTime()
Returns the last modified time of this file. |
protected java.io.OutputStream |
doGetOutputStream(boolean bAppend)
Creates an output stream to write the file content to. |
protected RandomAccessContent |
doGetRandomAccessContent(RandomAccessMode mode)
Creates access to the file for random i/o. |
protected FileType |
doGetType()
Determines the type of this file. |
protected java.lang.String[] |
doListChildren()
Lists the children of this file. |
protected void |
doRename(FileObject newfile)
Renames the file. |
protected boolean |
doSetLastModifiedTime(long modtime)
Sets the last modified time of this file. |
protected void |
endOutput()
Called when the ouput stream for this file is closed. |
protected void |
injectType(FileType fileType)
|
Methods inherited from class org.apache.commons.vfs2.provider.AbstractFileObject |
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canRenameTo, childrenChanged, close, copyFrom, createFile, createFolder, delete, delete, doCreateFileContent, doDetach, doGetAttributes, doGetCertificates, doIsHidden, doIsReadable, doIsSameFile, doIsWriteable, doListChildrenResolved, doRemoveAttribute, doSetAttribute, exists, finalize, findFiles, findFiles, getChild, getChildren, getContent, getFileContentInfoFactory, getFileOperations, getFileSystem, getInputStream, getName, getOutputStream, getOutputStream, getParent, getRandomAccessContent, getType, getURL, handleChanged, handleCreate, handleDelete, holdObject, isAttached, isContentOpen, isHidden, isReadable, isSameFile, isWriteable, moveTo, notifyAllStreamsClosed, onChange, onChildrenChanged, refresh, resolveFile, resolveFile, toString |
Methods inherited from class java.lang.Object |
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clone, equals, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Methods inherited from interface org.apache.commons.vfs2.FileObject |
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canRenameTo, close, copyFrom, createFile, createFolder, delete, delete, exists, findFiles, findFiles, getChild, getChildren, getContent, getFileOperations, getFileSystem, getName, getParent, getType, getURL, isAttached, isContentOpen, isHidden, isReadable, isWriteable, moveTo, refresh, resolveFile, resolveFile |
Constructor Detail |
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protected RamFileObject(AbstractFileName name, RamFileSystem fs)
name
- The name of the file.fs
- The FileSystem.Method Detail |
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protected FileType doGetType() throws java.lang.Exception
AbstractFileObject
doGetType
in class AbstractFileObject
java.lang.Exception
- if an error occurs.protected java.lang.String[] doListChildren() throws java.lang.Exception
AbstractFileObject
AbstractFileObject.doGetType()
returns FileType.FOLDER
. The return value of this method
is cached, so the implementation can be expensive.
doListChildren
in class AbstractFileObject
java.lang.Exception
- if an error occurs.protected long doGetContentSize() throws java.lang.Exception
AbstractFileObject
AbstractFileObject.doGetType()
returns FileType.FILE
.
doGetContentSize
in class AbstractFileObject
java.lang.Exception
- if an error occurs.protected java.io.InputStream doGetInputStream() throws java.lang.Exception
AbstractFileObject
AbstractFileObject.doGetType()
returns FileType.FILE
.
It is guaranteed that there are no open output streams for this file when this method is called.
The returned stream does not have to be buffered.
doGetInputStream
in class AbstractFileObject
java.lang.Exception
- if an error occurs.protected java.io.OutputStream doGetOutputStream(boolean bAppend) throws java.lang.Exception
AbstractFileObject
AbstractFileObject.doIsWriteable()
returns true.
AbstractFileObject.doGetType()
returns FileType.FILE
, or
AbstractFileObject.doGetType()
returns FileType.IMAGINARY
, and the file's
parent exists and is a folder.
It is guaranteed that there are no open stream (input or output) for this file when this method is called.
The returned stream does not have to be buffered.
This implementation throws an exception.
doGetOutputStream
in class AbstractFileObject
bAppend
- true if the file should be appended to, false if it should be overwritten.
java.lang.Exception
- if an error occurs.protected void doDelete() throws java.lang.Exception
AbstractFileObject
AbstractFileObject.doGetType()
does not return FileType.IMAGINARY
.
AbstractFileObject.doIsWriteable()
returns true.
doDelete
in class AbstractFileObject
java.lang.Exception
- if an error occurs.protected long doGetLastModifiedTime() throws java.lang.Exception
AbstractFileObject
AbstractFileObject.doGetType()
does not return FileType.IMAGINARY
.
This implementation throws an exception.
doGetLastModifiedTime
in class AbstractFileObject
java.lang.Exception
- if an error occurs.protected boolean doSetLastModifiedTime(long modtime) throws java.lang.Exception
AbstractFileObject
AbstractFileObject.doGetType()
does not return FileType.IMAGINARY
.
This implementation throws an exception.
doSetLastModifiedTime
in class AbstractFileObject
modtime
- The last modification time.
java.lang.Exception
- if an error occurs.protected void doCreateFolder() throws java.lang.Exception
AbstractFileObject
AbstractFileObject.doGetType()
returns FileType.IMAGINARY
.
doCreateFolder
in class AbstractFileObject
java.lang.Exception
- if an error occurs.protected void doRename(FileObject newfile) throws java.lang.Exception
AbstractFileObject
AbstractFileObject.doIsWriteable()
returns true.
doRename
in class AbstractFileObject
newfile
- A FileObject with the new file name.
java.lang.Exception
- if an error occurs.protected RandomAccessContent doGetRandomAccessContent(RandomAccessMode mode) throws java.lang.Exception
AbstractFileObject
AbstractFileObject.doGetType()
returns FileType.FILE
.
It is guaranteed that there are no open output streams for this file when this method is called.
doGetRandomAccessContent
in class AbstractFileObject
mode
- The mode to access the file.
java.lang.Exception
- if an error occurs.protected void doAttach() throws java.lang.Exception
AbstractFileObject
doAttach
in class AbstractFileObject
java.lang.Exception
- if an error occurs.protected void injectType(FileType fileType)
injectType
in class AbstractFileObject
protected void endOutput() throws java.lang.Exception
AbstractFileObject
endOutput
in class AbstractFileObject
java.lang.Exception
- if an error occurs.
|
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