Package com.yahoo.config.application.api

Class ApplicationFile

java.lang.Object

com.yahoo.config.application.api.ApplicationFile

All Implemented Interfaces:

Comparable<ApplicationFile>

public abstract class ApplicationFile
extends Object
implements Comparable<ApplicationFile>

An application file represents a file within an application package. This class can be used to traverse the entire application package file structure, as well as read and write files to it, and create directories.

Author:

Ulf Lilleengen

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ApplicationFile.MetaData
static interface	ApplicationFile.PathFilter

Field Summary

Fields

Modifier and Type	Field	Description
static String	ContentStatusChanged
static String	ContentStatusDeleted
static String	ContentStatusNew
protected com.yahoo.path.Path	path

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ApplicationFile(com.yahoo.path.Path path)

Method Summary

Modifier and Type	Method	Description
abstract ApplicationFile	appendFile(String value)	Appends the given string to this text file.
abstract ApplicationFile	createDirectory()	Create a directory at the path represented by this file.
abstract InputStream	createInputStream()	Create an InputStream for the contents of this file.
abstract Reader	createReader()	Create a Reader for the contents of this file.
abstract ApplicationFile	delete()	Delete the file pointed to by this.
boolean	equals(Object other)
abstract boolean	exists()	Test whether or not this file exists.
abstract ApplicationFile.MetaData	getMetaData()
protected com.yahoo.path.Path	getMetaPath()
com.yahoo.path.Path	getPath()	Get the path that this file represents.
abstract boolean	isDirectory()	Check whether or not this file is a directory.
List<ApplicationFile>	listFiles()	List the files under this directory.
List<ApplicationFile>	listFiles(boolean recurse)	List the files in this directory, optionally list files for subdirectories recursively as well.
abstract List<ApplicationFile>	listFiles(ApplicationFile.PathFilter filter)	List the files under this directory.
String	toString()
abstract ApplicationFile	writeFile(Reader input)	Write the contents from this reader to this file.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Comparable

compareTo

Field Detail

ContentStatusNew

public static final String ContentStatusNew

See Also:

Constant Field Values

ContentStatusChanged

public static final String ContentStatusChanged

See Also:

Constant Field Values

ContentStatusDeleted

public static final String ContentStatusDeleted

See Also:

Constant Field Values

path

protected final com.yahoo.path.Path path

Constructor Detail

ApplicationFile

protected ApplicationFile(com.yahoo.path.Path path)

Method Detail

isDirectory

public abstract boolean isDirectory()

Check whether or not this file is a directory.

Returns:

true if it is, false if not.

exists

public abstract boolean exists()

Test whether or not this file exists.

Returns:

true if it exists, false if not.

createReader

public abstract Reader createReader()
                             throws FileNotFoundException

Create a Reader for the contents of this file.

Returns:

A Reader that should be closed after use.

Throws:

FileNotFoundException - if the file is not found.

createInputStream

public abstract InputStream createInputStream()
                                       throws FileNotFoundException

Create an InputStream for the contents of this file.

Returns:

An InputStream that should be closed after use.

Throws:

FileNotFoundException - if the file is not found.

createDirectory

public abstract ApplicationFile createDirectory()

Create a directory at the path represented by this file. Parent directories will be automatically created.

Returns:

this

Throws:

IllegalArgumentException - if the directory already exists.

writeFile

public abstract ApplicationFile writeFile(Reader input)

Write the contents from this reader to this file. Any existing content will be overwritten!

Parameters:

input - A reader pointing to the content that should be written.

Returns:

this

appendFile

public abstract ApplicationFile appendFile(String value)

Appends the given string to this text file.

Returns:

this

listFiles

public List<ApplicationFile> listFiles()

List the files under this directory. If this is file, an empty list is returned. Only immediate files/subdirectories are returned.

Returns:

a list of files in this directory.

listFiles

public abstract List<ApplicationFile> listFiles(ApplicationFile.PathFilter filter)

List the files under this directory. If this is file, an empty list is returned. Only immediate files/subdirectories are returned.

Parameters:

filter - A filter functor for filtering path names

Returns:

a list of files in this directory.

listFiles

public List<ApplicationFile> listFiles(boolean recurse)

List the files in this directory, optionally list files for subdirectories recursively as well.

Parameters:

recurse - Set to true if all files in the directory tree should be returned.

Returns:

a list of files in this directory.

delete

public abstract ApplicationFile delete()

Delete the file pointed to by this. If it is a non-empty directory, the operation will throw.

Returns:

this.

Throws:

RuntimeException - if the file is a directory and not empty.

getPath

public com.yahoo.path.Path getPath()

Get the path that this file represents.

Returns:

a Path

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object other)

Overrides:

equals in class Object

getMetaPath

protected com.yahoo.path.Path getMetaPath()

getMetaData

public abstract ApplicationFile.MetaData getMetaData()