AbstractFileActivity (OGSA-DAI -- (c) International Business Machines Corporation, 2002-2006, The University of Edinburgh, 2002-2006)

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uk.org.ogsadai.activity.files
Class AbstractFileActivity

java.lang.Object
  |
  +--uk.org.ogsadai.activity.Activity
        |
        +--uk.org.ogsadai.activity.files.AbstractFileActivity

Direct Known Subclasses:: AddAndIndexFileActivity, DirectoryAccessActivity, FileAccessActivity, FileManipulationActivity, FileReadingActivity, FileWritingActivity, SearchIndexedFileActivity

public abstract class AbstractFileActivity
extends Activity

Abstract superclass for all activities which are intended for use with data resources that implement the FileAccessProvider interface.

Sub-classes may override the initialise() method, but call super.initialise() in order to perform some checks on the connection managers's configuration.

Author:: The OGSA-DAI Project Team

Field Summary
`private static java.lang.String`	`COPYRIGHT_NOTICE` Copyright statement
`protected java.lang.String`	`mCredentials` The user's credentials
`protected FileAccessProvider`	`mFileAccessProvider` The file access provider used to authorize file access
`protected java.io.File`	`mTopDir` The directory in the filesystem of the associated file data service resource

Fields inherited from class uk.org.ogsadai.activity.Activity

mContext, mExternalInputs, mExternalOutputs, mInternalInputs, mInternalOutputs

Constructor Summary
`protected`	`AbstractFileActivity(org.w3c.dom.Element element)`

Method Summary
`void`	`initialise()` Gets the data resource accessor for the files data resource according to whether the users credentials permit this access.

Methods inherited from class uk.org.ogsadai.activity.Activity

cleanUp, connectsTo, createOutputPipe, getActivityConfiguration, getActivityName, getCause, getName, getObservableStatus, getProperties, getSession, getStatus, hasActivityConfiguration, hasProperties, process, processBlock, processFirst, setActivityName, setCompleted, setError

Methods inherited from class java.lang.Object

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

Field Detail

COPYRIGHT_NOTICE

private static final java.lang.String COPYRIGHT_NOTICE

See Also:: Constant Field Values

mFileAccessProvider

protected FileAccessProvider mFileAccessProvider

The file access provider used to authorize file access

mTopDir

protected java.io.File mTopDir

The directory in the filesystem of the associated file data service resource

mCredentials

protected java.lang.String mCredentials

The user's credentials

Constructor Detail

AbstractFileActivity

protected AbstractFileActivity(org.w3c.dom.Element element)
                        throws ActivitySpecificationException,
                               ActivityCreationException

Method Detail

initialise

public void initialise()
                throws ActivitySpecificationException,
                       ActivityExecutionException

Gets the data resource accessor for the files data resource according to whether the users credentials permit this access.

Overrides:: initialise in class Activity

Throws:: ActivitySpecificationException - If the user is not permitted to access the resource.; ActivityExecutionException - If some internal problem occurs.
See Also:: Activity.initialise()