URLFile (Apache Derby V10.14 Internals)

java.lang.Object
- org.apache.derby.impl.io.InputStreamFile<URLStorageFactory>
- - org.apache.derby.impl.io.URLFile

All Implemented Interfaces:

StorageFile
```
class URLFile
extends InputStreamFile<URLStorageFactory>
```
This class provides a http based implementation of the StorageFile interface. It is used by the database engine to access persistent data and transaction logs under the http and https subsubprotocols.

Field Summary
- Fields inherited from class org.apache.derby.impl.io.InputStreamFile
  nameStart, path, storageFactory
- Fields inherited from interface org.apache.derby.io.StorageFile
  EXCLUSIVE_FILE_LOCK, EXCLUSIVE_FILE_LOCK_NOT_AVAILABLE, NO_FILE_LOCK_SUPPORT

Constructor Summary

Constructors
Modifier	Constructor	Description
`(package private)`	`URLFile(URLFile dir, java.lang.String name)`
`(package private)`	`URLFile(URLStorageFactory storageFactory, java.lang.String path)`
`private`	`URLFile(URLStorageFactory storageFactory, java.lang.String child, int pathLen)`
`(package private)`	`URLFile(URLStorageFactory storageFactory, java.lang.String parent, java.lang.String name)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`exists()`	Tests whether the named file exists.
`java.io.InputStream`	`getInputStream()`	Creates an input stream from a file name.
`(package private) StorageFile`	`getParentDir(int pathLen)`	Get the parent of this file.

Methods inherited from class org.apache.derby.impl.io.InputStreamFile
canWrite, createNewFile, delete, deleteAll, equals, getCanonicalPath, getExclusiveFileLock, getName, getOutputStream, getOutputStream, getParentDir, getPath, getRandomAccessFile, hashCode, isDirectory, limitAccessToOwner, list, mkdir, mkdirs, releaseExclusiveFileLock, renameTo, setReadOnly, toString

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - URLFile
```
URLFile(URLStorageFactory storageFactory,
        java.lang.String path)
```
  - URLFile
```
URLFile(URLStorageFactory storageFactory,
        java.lang.String parent,
        java.lang.String name)
```
  - URLFile
```
URLFile(URLFile dir,
        java.lang.String name)
```
  - URLFile
```
private URLFile(URLStorageFactory storageFactory,
                java.lang.String child,
                int pathLen)
```
- Method Detail
  - exists
```
public boolean exists()
```
    Tests whether the named file exists.
    
    Specified by:
    
    exists in interface StorageFile
    
    Specified by:
    
    exists in class InputStreamFile<URLStorageFactory>
    
    Returns:
    
    true if the named file exists, false if not.
  - getParentDir
```
StorageFile getParentDir(int pathLen)
```
    Get the parent of this file.
    
    Specified by:
    
    getParentDir in class InputStreamFile<URLStorageFactory>
    
    Parameters:
    
    pathLen - the length of the parent's path name.
  - getInputStream
```
public java.io.InputStream getInputStream()
                                   throws java.io.FileNotFoundException
```
    Creates an input stream from a file name.
    
    Specified by:
    
    getInputStream in interface StorageFile
    
    Specified by:
    
    getInputStream in class InputStreamFile<URLStorageFactory>
    
    Returns:
    
    an input stream suitable for reading from the file.
    
    Throws:
    
    java.io.FileNotFoundException - if the file is not found.

Class URLFile

Field Summary

Fields inherited from class org.apache.derby.impl.io.InputStreamFile

Fields inherited from interface org.apache.derby.io.StorageFile

Constructor Summary

Method Summary

Methods inherited from class org.apache.derby.impl.io.InputStreamFile

Methods inherited from class java.lang.Object

Constructor Detail

URLFile

URLFile

URLFile

URLFile

Method Detail

exists

getParentDir

getInputStream