javax.activation
Class URLDataSource
- java.lang.Object
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- javax.activation.URLDataSource
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- All Implemented Interfaces:
- DataSource
public class URLDataSource extends Object implements DataSource
The URLDataSource class provides an object that wraps aURLobject 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.- Since:
- 1.6
- See Also:
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DataSource,DataHandler
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Constructor Summary
Constructors Constructor and Description URLDataSource(URL url)URLDataSource constructor.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method and Description StringgetContentType()Returns the value of the URL content-type header field.InputStreamgetInputStream()The getInputStream method from the URL.StringgetName()Calls thegetFilemethod on the URL used to instantiate the object.OutputStreamgetOutputStream()The getOutputStream method from the URL.URLgetURL()Return the URL used to create this DataSource.
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Constructor Detail
URLDataSource
public URLDataSource(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:
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url- The URL to be encapsulated in this object.
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Method Detail
getContentType
public String getContentType()
Returns the value of the URL content-type header field. It calls the URL'sURLConnection.getContentTypemethod after retrieving a URLConnection object. Note: this method attempts to call theopenConnectionmethod 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:
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getContentTypein interfaceDataSource - Returns:
- the content type.
getName
public String getName()
Calls thegetFilemethod on the URL used to instantiate the object.- Specified by:
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getNamein interfaceDataSource - Returns:
- the result of calling the URL's getFile method.
getInputStream
public InputStream getInputStream() throws IOException
The getInputStream method from the URL. Calls theopenStreammethod on the URL.- Specified by:
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getInputStreamin interfaceDataSource - Returns:
- the InputStream.
- Throws:
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IOException
getOutputStream
public OutputStream getOutputStream() throws 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:
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getOutputStreamin interfaceDataSource - Returns:
- the OutputStream.
- Throws:
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IOException
getURL
public URL getURL()
Return the URL used to create this DataSource.- Returns:
- The URL.
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For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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