On Jul 30, 2010, at 8:42 AM, Martin Gainty wrote:
A great question!
i found 2 items that may help:
1)Javadoc for an Ant Resource:
http://www.docjar.com/docs/api/org/apache/tools/ant/types/
Resource.html
This does communicate the basic idea that a Resource is *like* a File.
2)The folks at Simon Fraser put together this user-friendly
explanation
http://www.sfu.ca/cprost/docs/A%20Brief%20Overview%20of%20ANT.pdf
Okay, this link has nothing to do with Apache Ant. :)
the way I classify a resource is any entity which is not a Java class
so an (ant) java class can be configured by a resource specifically
.properties
or a resource which is used to describe schema could be described
and defined by a resource specifically:
xml/xsd
or documents with or without associated view programmes described
by a resource specifically:
pdf/doc
anyone?
Have you read http://ant.apache.org/manual/Types/resources.html ?
The description of a resourcecollection is on the same page. So to
put it simply, if you use a fileset you _are_ using a
resourcecollection. About the only thing you could use
resourcecollections for might be to <restrict> a bunch of atomically-
specified <file> resources to <exists>; the catch is that <fileset>,
by virtue of the fact that it discovers files by scanning the
filesystem and thus _only_ contains files that exist, more or less
does this for you. Finally, in the case of the copy task, ask
yourself: How would you copy a resource that doesn't exist? By
creating a destination file that doesn't exist? That's crazy
talk! :) So copy simply ignores nonexistent resources. In this
particular example your job of only copying a file that exists has
been done for you first by <fileset> and then by <copy>. You should
be covered. :)
HTH,
Matt
Martin
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Subject: RE: Ant: want to copy a file if it exists
Date: Fri, 30 Jul 2010 08:43:30 -0400
From: eric.w...@thomsonreuters.com
To: user@ant.apache.org
I was curious if resource collections were an option to use. To be
honest, I have never fully appreciated resources. Is there a good
tutorial on resources in ANT?
-----Original Message-----
From: Vimil Saju [mailto:vimils...@yahoo.com]
Sent: Thursday, July 29, 2010 8:27 PM
To: Ant Users List
Subject: Re: Ant: want to copy a file if it exists
Use the 'available' task to check if a file exists. There is also
an 'if' task which is part of antcontrib that you can use to
execute tasks conditionally
--- On Thu, 7/29/10, eric.w...@thomsonreuters.com
<eric.w...@thomsonreuters.com> wrote:
From: eric.w...@thomsonreuters.com <eric.w...@thomsonreuters.com>
Subject: Ant: want to copy a file if it exists
To: user@ant.apache.org
Date: Thursday, July 29, 2010, 2:08 PM
I want to check to see if a file exist and if so then copy it.
What is
the best way for performing this conditional task?
Thanks, eric
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