Module jdk.scripting.nashorn

Package jdk.nashorn.api.scripting

Class URLReader

java.lang.Object

java.io.Reader

jdk.nashorn.api.scripting.URLReader

All Implemented Interfaces:

Closeable, AutoCloseable, Readable

public final class URLReader
extends Reader

A Reader that reads from a URL. Used to make sure that the reader reads content from given URL and can be trusted to do so.

Since:

1.8u40

Field Summary

Fields inherited from class java.io.Reader

lock

Constructor Summary

Constructors

Constructor	Description
URLReader(URL url)	Constructor
URLReader(URL url, String charsetName)	Constructor
URLReader(URL url, Charset cs)	Constructor

Method Summary

Modifier and Type	Method	Description
void	close()	Closes the stream and releases any system resources associated with it.
Charset	getCharset()	Charset used by this reader
URL	getURL()	URL of this reader
int	read(char[] cbuf, int off, int len)	Reads characters into a portion of an array.

Methods inherited from class java.lang.Object

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

Methods inherited from class java.io.Reader

mark, markSupported, read, read, read, ready, reset, skip

Constructor Detail

URLReader

public URLReader(URL url)

Constructor

Parameters:

url - URL for this URLReader

Throws:

NullPointerException - if url is null

URLReader

public URLReader(URL url,
                 String charsetName)

Constructor

Parameters:

url - URL for this URLReader

charsetName - Name of the Charset used to convert bytes to chars

Throws:

NullPointerException - if url is null

URLReader

public URLReader(URL url,
                 Charset cs)

Constructor

Parameters:

url - URL for this URLReader

cs - Charset used to convert bytes to chars

Throws:

NullPointerException - if url is null

Method Detail

read

public int read(char[] cbuf,
                int off,
                int len)
         throws IOException

Description copied from class: java.io.Reader

Reads characters into a portion of an array. This method will block until some input is available, an I/O error occurs, or the end of the stream is reached.

Specified by:

read in class Reader

Parameters:

cbuf - Destination buffer

off - Offset at which to start storing characters

len - Maximum number of characters to read

Returns:

The number of characters read, or -1 if the end of the stream has been reached

Throws:

IOException - If an I/O error occurs

close

public void close()
           throws IOException

Description copied from class: java.io.Reader

Closes the stream and releases any system resources associated with it. Once the stream has been closed, further read(), ready(), mark(), reset(), or skip() invocations will throw an IOException. Closing a previously closed stream has no effect.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Specified by:

close in class Reader

Throws:

IOException - If an I/O error occurs

getURL

public URL getURL()

URL of this reader

Returns:

the URL from which this reader reads.

getCharset

public Charset getCharset()

Charset used by this reader

Returns:

the Charset used to convert bytes to chars