org.apache.jetspeed.portal.expire
Class FileWatcher

java.lang.Object
  org.apache.jetspeed.portal.expire.FileWatcher

All Implemented Interfaces:

java.io.Serializable

public class FileWatcher

extends java.lang.Object

implements java.io.Serializable

A generic class for watching a file and determining if it has changed.

Version:

$Id: FileWatcher.java,v 1.16 2004/02/23 03:24:40 jford Exp $

Author:

Kevin A. Burton

See Also:

Serialized Form

Field Summary

static java.lang.String	EXCEPTION_URL_NOT_IN_CACHE
static java.lang.String	EXCEPTION_URL_NOT_NULL

Constructor Summary

FileWatcher(java.lang.String url)
Create a FileWatcher with no parent info.

FileWatcher(java.lang.String url, java.lang.String parent)
Create a new FileWatcher to watch the given URL.

Method Summary

boolean

hasChanged() Return true if the URL on which this is based has changed.

Methods inherited from class java.lang.Object

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

Field Detail

EXCEPTION_URL_NOT_NULL

public static final java.lang.String EXCEPTION_URL_NOT_NULL

See Also:

Constant Field Values

EXCEPTION_URL_NOT_IN_CACHE

public static final java.lang.String EXCEPTION_URL_NOT_IN_CACHE

See Also:

Constant Field Values

Constructor Detail

FileWatcher

public FileWatcher(java.lang.String url)
            throws java.io.IOException

Create a FileWatcher with no parent info.

See Also:

FileWatcher( String, String )

FileWatcher

public FileWatcher(java.lang.String url,
                   java.lang.String parent)
            throws java.io.IOException

Create a new FileWatcher to watch the given URL.

Method Detail

hasChanged

public boolean hasChanged()

Return true if the URL on which this is based has changed.