CPFile (Apache Derby V10.14 Internals)

java.lang.Object
- org.apache.derby.impl.io.InputStreamFile<CPStorageFactory>
- - org.apache.derby.impl.io.CPFile

All Implemented Interfaces:

StorageFile
```
class CPFile
extends InputStreamFile<CPStorageFactory>
```
This class provides a class path based implementation of the StorageFile interface. It is used by the database engine to access persistent data and transaction logs under the classpath subsubprotocol.

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)`	`CPFile(CPFile dir, java.lang.String name)`
`(package private)`	`CPFile(CPStorageFactory storageFactory, java.lang.String path)`
`private`	`CPFile(CPStorageFactory storageFactory, java.lang.String child, int pathLen)`
`(package private)`	`CPFile(CPStorageFactory storageFactory, java.lang.String parent, java.lang.String name)`

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`exists()`	Tests whether the named file exists.
`private static java.lang.ClassLoader`	`getContextClassLoader(java.lang.Thread thread)`	Privileged wrapper for `Thread.getContextClassLoader()`.
`java.io.InputStream`	`getInputStream()`	Creates an input stream from a file name.
`(package private) StorageFile`	`getParentDir(int pathLen)`	Get the parent of this file.
`private static java.net.URL`	`getResource(java.lang.ClassLoader cl, java.lang.String name)`	Privileged wrapper for `ClassLoader.getResource(String)`.
`private static java.io.InputStream`	`getResourceAsStream(java.lang.ClassLoader cl, java.lang.String name)`	Privileged wrapper for `ClassLoader.getResourceAsStream(String)`.
`private static java.net.URL`	`getSystemResource(java.lang.String name)`	Privileged wrapper for `ClassLoader.getSystemResource(String)`.
`private static java.io.InputStream`	`getSystemResourceAsStream(java.lang.String name)`	Privileged wrapper for `ClassLoader.getSystemResourceAsStream(String)`.
`private java.net.URL`	`getURL()`	Return a URL for this file (resource).

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
  - CPFile
```
CPFile(CPStorageFactory storageFactory,
       java.lang.String path)
```
  - CPFile
```
CPFile(CPStorageFactory storageFactory,
       java.lang.String parent,
       java.lang.String name)
```
  - CPFile
```
CPFile(CPFile dir,
       java.lang.String name)
```
  - CPFile
```
private CPFile(CPStorageFactory 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<CPStorageFactory>
    
    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<CPStorageFactory>
    
    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<CPStorageFactory>
    
    Returns:
    
    an input stream suitable for reading from the file.
    
    Throws:
    
    java.io.FileNotFoundException - if the file is not found.
  - getURL
```
private java.net.URL getURL()
```
    Return a URL for this file (resource).
  - getContextClassLoader
```
private static java.lang.ClassLoader getContextClassLoader(java.lang.Thread thread)
```
    Privileged wrapper for Thread.getContextClassLoader().
  - getResource
```
private static java.net.URL getResource(java.lang.ClassLoader cl,
                                        java.lang.String name)
```
    Privileged wrapper for ClassLoader.getResource(String).
  - getSystemResource
```
private static java.net.URL getSystemResource(java.lang.String name)
```
    Privileged wrapper for ClassLoader.getSystemResource(String).
  - getResourceAsStream
```
private static java.io.InputStream getResourceAsStream(java.lang.ClassLoader cl,
                                                       java.lang.String name)
```
    Privileged wrapper for ClassLoader.getResourceAsStream(String).
  - getSystemResourceAsStream
```
private static java.io.InputStream getSystemResourceAsStream(java.lang.String name)
```
    Privileged wrapper for ClassLoader.getSystemResourceAsStream(String).

Class CPFile

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

CPFile

CPFile

CPFile

CPFile

Method Detail

exists

getParentDir

getInputStream

getURL

getContextClassLoader

getResource

getSystemResource

getResourceAsStream

getSystemResourceAsStream