uk.ac.starlink.util

Class URLDataSource

java.lang.Object

uk.ac.starlink.util.DataSource

uk.ac.starlink.util.URLDataSource

public class URLDataSource
extends DataSource

A DataSource implementation based on a URL.

This uses an AuthManager to manage authentication and redirects.

Author:

Mark Taylor (Starlink), Peter W. Draper (JAC, Durham University)

Field Summary

Fields inherited from class uk.ac.starlink.util.DataSource

DEFAULT_INTRO_LIMIT, MARK_WORKAROUND_PROPERTY

Constructor Summary

Constructors

Constructor and Description
URLDataSource(URL url) Constructs a DataSource from a URL with default content coding and AuthManager.
URLDataSource(URL url, ContentCoding coding) Constructs a DataSource from a URL with given content coding policy.
URLDataSource(URL url, ContentCoding coding, AuthManager authManager) Constructs a DataSource from a URL with given content coding policy and AuthManager.

Method Summary

Modifier and Type	Method and Description
protected InputStream	getRawInputStream() Provides a new InputStream for this data source.
URL	getURL() Returns the URL on which this URLDataSource is based.

Methods inherited from class uk.ac.starlink.util.DataSource

close, forceCompression, getCompression, getHybridInputStream, getInputStream, getInputStream, getIntro, getIntroLimit, getLength, getMarkWorkaround, getName, getPosition, getRawLength, getSystemId, makeDataSource, makeDataSource, makeDataSource, setCompression, setIntroLimit, setMarkWorkaround, setName, setPosition, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

URLDataSource

public URLDataSource(URL url)

Constructs a DataSource from a URL with default content coding and AuthManager. If the URL has a ref part (the bit after the '#') it will be treated as the position attribute of this DataSource.

Parameters:

url - URL

URLDataSource

public URLDataSource(URL url,
                     ContentCoding coding)

Constructs a DataSource from a URL with given content coding policy. If the URL has a ref part (the bit after the '#') it will be treated as the position attribute of this DataSource.

Parameters:

url - URL

coding - configures HTTP compression; may be overridden if inapplicable or security concerns apply

URLDataSource

public URLDataSource(URL url,
                     ContentCoding coding,
                     AuthManager authManager)

Constructs a DataSource from a URL with given content coding policy and AuthManager. If the URL has a ref part (the bit after the '#') it will be treated as the position attribute of this DataSource.

Parameters:

url - URL

coding - configures HTTP compression; may be overridden if inapplicable or security concerns apply

authManager - authentication manager

Method Detail

getRawInputStream

protected InputStream getRawInputStream()
                                 throws IOException

Description copied from class: DataSource

Provides a new InputStream for this data source. This method should be implemented by subclasses to provide a new InputStream giving the raw content of the source each time it is called. The general contract of this method is that each time it is called it will return a stream with the same content.

Specified by:

getRawInputStream in class DataSource

Returns:

an InputStream containing the data of this source

Throws:

IOException

getURL

public URL getURL()

Returns the URL on which this URLDataSource is based.

Overrides:

getURL in class DataSource

Returns:

the URL