Java 2 Platform EE v1.3: Class URLDataSource - Java Platform, Enterprise Edition v1.3.1 API Specifications

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javax.activation
Class URLDataSource

java.lang.Object
  |
  +--javax.activation.URLDataSource

All Implemented Interfaces:: DataSource

public class URLDataSource
extends java.lang.Object
implements DataSource

The URLDataSource class provides an object that wraps a URL object in a DataSource interface. URLDataSource simplifies the handling of data described by URLs within the JavaBeans Activation Framework because this class can be used to create new DataHandlers. NOTE: The DataHandler object creates a URLDataSource internally, when it is constructed with a URL.

See Also:: DataSource, DataHandler

Constructor Summary

URLDataSource(java.net.URL url)
          URLDataSource constructor.

Method Summary

java.lang.String getContentType()
          Returns the value of the URL content-type header field.

java.io.InputStream getInputStream()
          The getInputStream method from the URL.

java.lang.String getName()
          Calls the getFile method on the URL used to instantiate the object.

java.io.OutputStream getOutputStream()
          The getOutputStream method from the URL.

java.net.URL getURL()
          Return the URL used to create this DataSource.

Methods inherited from class java.lang.Object

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

Constructor Detail

URLDataSource

public URLDataSource(java.net.URL url)

URLDataSource constructor. The URLDataSource class will not open a connection to the URL until a method requiring it to do so is called.

Parameters:: url - The URL to be encapsulated in this object.

Method Detail

getContentType

public java.lang.String getContentType()

Returns the value of the URL content-type header field. It calls the URL's URLConnection.getContentType method after retrieving a URLConnection object. Note: this method attempts to call the openConnection method on the URL. If this method fails, or if a content type is not returned from the URLConnection, getContentType returns "application/octet-stream" as the content type.

Specified by:: getContentType in interface DataSource

Returns:: the content type.

getName

public java.lang.String getName()

Calls the getFile method on the URL used to instantiate the object.

Specified by:: getName in interface DataSource

Returns:: the result of calling the URL's getFile method.

getInputStream

public java.io.InputStream getInputStream()
                                   throws java.io.IOException

The getInputStream method from the URL. Calls the openStream method on the URL.

Specified by:: getInputStream in interface DataSource

Returns:: the InputStream.

getOutputStream

public java.io.OutputStream getOutputStream()
                                     throws java.io.IOException

The getOutputStream method from the URL. First an attempt is made to get the URLConnection object for the URL. If that succeeds, the getOutputStream method on the URLConnection is returned.

Specified by:: getOutputStream in interface DataSource

Returns:: the OutputStream.

getURL

public java.net.URL getURL()

Return the URL used to create this DataSource.

Returns:: The URL.