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java.lang.Objectorg.h2.store.fs.FileSystem
public abstract class FileSystem
The file system is a storage abstraction.
Constructor Summary | |
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FileSystem()
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Method Summary | |
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protected abstract boolean |
accepts(java.lang.String fileName)
Check if the file system is responsible for this file name. |
abstract boolean |
canWrite(java.lang.String fileName)
Check if the file is writable. |
abstract void |
copy(java.lang.String original,
java.lang.String copy)
Copy a file from one directory to another, or to another file. |
abstract void |
createDirs(java.lang.String fileName)
Create all required directories that are required for this file. |
abstract boolean |
createNewFile(java.lang.String fileName)
Create a new file. |
java.lang.String |
createTempFile(java.lang.String prefix,
java.lang.String suffix,
boolean deleteOnExit,
boolean inTempDir)
Create a new temporary file. |
abstract void |
delete(java.lang.String fileName)
Delete a file. |
abstract void |
deleteRecursive(java.lang.String directory,
boolean tryOnly)
Delete a directory or file and all subdirectories and files. |
abstract boolean |
exists(java.lang.String fileName)
Checks if a file exists. |
abstract boolean |
fileStartsWith(java.lang.String fileName,
java.lang.String prefix)
Check if a file starts with a given prefix. |
abstract java.lang.String |
getAbsolutePath(java.lang.String fileName)
Get the absolute file name. |
abstract java.lang.String |
getFileName(java.lang.String name)
Get the file name (without directory part). |
static FileSystem |
getInstance(java.lang.String fileName)
Get the file system object. |
abstract long |
getLastModified(java.lang.String fileName)
Get the last modified date of a file |
protected java.lang.String |
getNextTempFileNamePart(boolean newRandom)
Get the next temporary file name part (the part in the middle). |
abstract java.lang.String |
getParent(java.lang.String fileName)
Get the parent directory of a file or directory. |
abstract boolean |
isAbsolute(java.lang.String fileName)
Check if the file name includes a path. |
abstract boolean |
isDirectory(java.lang.String fileName)
Check if it is a file or a directory. |
abstract boolean |
isReadOnly(java.lang.String fileName)
Check if a file is read-only. |
abstract long |
length(java.lang.String fileName)
Get the length of a file. |
abstract java.lang.String[] |
listFiles(java.lang.String directory)
List the files in the given directory. |
void |
mkdirs(java.lang.String directoryName)
Create all required directories. |
abstract java.lang.String |
normalize(java.lang.String fileName)
Normalize a file name. |
abstract java.io.InputStream |
openFileInputStream(java.lang.String fileName)
Create an input stream to read from the file. |
abstract FileObject |
openFileObject(java.lang.String fileName,
java.lang.String mode)
Open a random access file object. |
abstract java.io.OutputStream |
openFileOutputStream(java.lang.String fileName,
boolean append)
Create an output stream to write into the file. |
static void |
register(FileSystem service)
Register a file system. |
abstract void |
rename(java.lang.String oldName,
java.lang.String newName)
Rename a file if this is allowed. |
abstract boolean |
setReadOnly(java.lang.String fileName)
Disable the ability to write. |
abstract boolean |
tryDelete(java.lang.String fileName)
Try to delete a file. |
static void |
unregister(FileSystem service)
Unregister a file system. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public FileSystem()
Method Detail |
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public static FileSystem getInstance(java.lang.String fileName)
fileName
- the file name or prefix
public static void register(FileSystem service)
service
- the file systempublic static void unregister(FileSystem service)
service
- the file systemprotected abstract boolean accepts(java.lang.String fileName)
fileName
- the file name
public abstract long length(java.lang.String fileName)
fileName
- the file name
public abstract void rename(java.lang.String oldName, java.lang.String newName)
oldName
- the old fully qualified file namenewName
- the new fully qualified file namepublic abstract boolean createNewFile(java.lang.String fileName)
fileName
- the file name
public abstract boolean exists(java.lang.String fileName)
fileName
- the file name
public abstract void delete(java.lang.String fileName)
fileName
- the file namepublic abstract boolean tryDelete(java.lang.String fileName)
fileName
- the file name
public abstract java.lang.String[] listFiles(java.lang.String directory)
directory
- the directory
public abstract void deleteRecursive(java.lang.String directory, boolean tryOnly)
directory
- the directorytryOnly
- whether errors should be ignoredpublic abstract boolean isReadOnly(java.lang.String fileName)
fileName
- the file name
public abstract java.lang.String normalize(java.lang.String fileName)
fileName
- the file name
public abstract java.lang.String getParent(java.lang.String fileName)
fileName
- the file or directory name
public abstract boolean isDirectory(java.lang.String fileName)
fileName
- the file or directory name
public abstract boolean isAbsolute(java.lang.String fileName)
fileName
- the file name
public abstract java.lang.String getAbsolutePath(java.lang.String fileName)
fileName
- the file name
public abstract long getLastModified(java.lang.String fileName)
fileName
- the file name
public abstract boolean canWrite(java.lang.String fileName)
fileName
- the file name
public abstract void copy(java.lang.String original, java.lang.String copy)
original
- the original file namecopy
- the file name of the copypublic void mkdirs(java.lang.String directoryName)
directoryName
- the directory namepublic abstract void createDirs(java.lang.String fileName)
fileName
- the file name (not directory name)public abstract java.lang.String getFileName(java.lang.String name)
name
- the directory and file name
public abstract boolean fileStartsWith(java.lang.String fileName, java.lang.String prefix)
fileName
- the complete file nameprefix
- the prefix
public abstract java.io.OutputStream openFileOutputStream(java.lang.String fileName, boolean append)
fileName
- the file nameappend
- if true, the file will grow, if false, the file will be
truncated first
public abstract FileObject openFileObject(java.lang.String fileName, java.lang.String mode) throws java.io.IOException
fileName
- the file namemode
- the access mode. Supported are r, rw, rws, rwd
java.io.IOException
public abstract java.io.InputStream openFileInputStream(java.lang.String fileName) throws java.io.IOException
fileName
- the file name
java.io.IOException
public abstract boolean setReadOnly(java.lang.String fileName)
fileName
- the file name
protected java.lang.String getNextTempFileNamePart(boolean newRandom)
newRandom
- if the random part of the filename should change
public java.lang.String createTempFile(java.lang.String prefix, java.lang.String suffix, boolean deleteOnExit, boolean inTempDir) throws java.io.IOException
prefix
- the prefix of the file name (including directory name if
required)suffix
- the suffixdeleteOnExit
- if the file should be deleted when the virtual
machine existsinTempDir
- if the file should be stored in the temporary directory
java.io.IOException
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