#584 Consider Jython addToPath command which downloads jars

[Jeremy Faden]

It would be nice to have a command to download a jar file and put it on the path. Right now, one must download and unzip the jar file, and then add the unzip directory to the jython path.

 # cd /tmp/jcodec/
 # wget -N http://jcodec.org/downloads/jcodec-0.1.9.jar
 # jar xvf jcodec-0.1.9.jar
 import sys
 sys.path.append("/tmp/jcodec/")  

instead:

 addToSearchPath( sys.path, 'http://jcodec.org/downloads/jcodec-0.1.9.jar', monitor )

[Jeremy Faden]

See the cookbook entry about "Jython Search Path"

[Jeremy Faden]

This should allow a zip containing a .jar to be accessed, for example:
addToSearchPath('http://www.trieuvan.com/apache//commons/math/binaries/commons-math3-3.6.1-bin.zip/commons-math3-3.6.1/commons-math3-3.6.1.jar', monitor )

This would contain the logic to extract the jar, if necessary unpack the jar, and then put it on the search path.

[Jeremy Faden]

Note the code should work with any Autoplot:

import sys
addToSearchPath( sys.path, 'http://www-us.apache.org/dist//commons/math/binaries/commons-math3-3.6.1-bin.zip/commons-math3-3.6.1/commons-math3-3.6.1.jar', monitor )
from org.apache.commons.math3.distribution import BetaDistribution
beta= BetaDistribution(2,5)

xx= linspace(0,1.0,100)
yy= zeros(100)
for i in indgen(100):
    yy[i]= beta.density(xx[i].value())
#yy= map( xx, beta.density )
plot( xx, yy )

[Jeremy Faden]

See also https://sourceforge.net/p/autoplot/feature-requests/583/

[Jeremy Faden]

I needed something to decode ico files:

path= 'http://jfaden.net/~jbf/autoplot/lib/image4j-0.7.2.jar'
from org.autoplot.datasource import FileSystemUtil
jarFile= FileSystemUtil.doDownload( path, monitor )
import sys
sys.path.append( jarFile.toString() )

ff= downloadResourceAsTempFile(URL('http://cottagesystems.com/favicon.ico'),monitor)

from  net.sf.image4j.codec.ico import ICODecoder
imgs= ICODecoder.read(ff)

from javax.swing import JPanel,JLabel,ImageIcon,JOptionPane,BoxLayout
list= JPanel()
list.setLayout( BoxLayout(list,BoxLayout.Y_AXIS) )
for i in imgs:
    l= JLabel('icon %dx%d' % ( i.getWidth(), i.getHeight() ) )
    print ImageIcon(i)
    l.setIcon( ImageIcon( i ) )
    list.add( l )
list.revalidate()
JOptionPane.showMessageDialog(None,list)

[Jeremy Faden]

For some reason the above script works with a fresh Autoplot launch, but this script doesn't:

#f1= getFile('http://central.maven.org/maven2/org/jcodec/jcodec/0.2.2/jcodec-0.2.2.jar',monitor.getSubtaskMonitor('load jar'))
#f2= getFile('http://central.maven.org/maven2/org/jcodec/jcodec-javase/0.2.2/jcodec-javase-0.2.2.jar',monitor.getSubtaskMonitor('load BufferedImage support jar'))

from org.autoplot.datasource import FileSystemUtil
f1= FileSystemUtil.doDownload( 'http://central.maven.org/maven2/org/jcodec/jcodec/0.2.2/jcodec-0.2.2.jar',monitor.getSubtaskMonitor('load jar') )
f2= FileSystemUtil.doDownload( 'http://central.maven.org/maven2/org/jcodec/jcodec-javase/0.2.2/jcodec-javase-0.2.2.jar',monitor.getSubtaskMonitor('load BI jar') )

# on 2017-11-26, I had to unjar the jar file on Unix.
import sys
#sys.path.append(f1.toString())  
sys.path.append(f2.toString())  
#sys.path.append('/tmp/jcodec/jcodec')  
#sys.path.append('/tmp/jcodec/jcodec-javase')  

from org.jcodec.api.awt import AWTSequenceEncoder
from org.jcodec.common.io import NIOUtils
from javax.imageio import ImageIO
from java.io import File

from org.jcodec.common.model import Rational
from org.jcodec.common.model import ColorSpace, Picture
from org.jcodec.common.Format import MOV,H264

enc = AWTSequenceEncoder.createSequenceEncoder(File("/tmp/filename.mp4"),24)
dir(enc)
dd= '/home/jbf/pngwalk/mms/'
ff= listDirectory(dd+'product_*.png')
for f in ff:
   img= ImageIO.read( File(dd+f) )
   enc.encodeImage(img)
enc.finish()

Actually... Sometimes the above example (2017-10-08) doesn't work. I start a fresh jumbojar version and it's not working.

[Jeremy Faden]

I need to get this into the nightly tests. I was hoping this script would work:

s='https://bitbucket.org/xerial/sqlite-jdbc/downloads/sqlite-jdbc-3.21.0.jar'

import sys
addToSearchPath( sys.path,s,monitor)

from java.sql import DriverManager

import org.sqlite.SQLiteConfig  # load the class
org.sqlite.SQLiteConfig

connection = DriverManager.getConnection("jdbc:sqlite:sample.db")


statement = connection.createStatement()
statement.setQueryTimeout(30)  # set timeout to 30 sec.

statement.executeUpdate("drop table if exists person");
statement.executeUpdate("create table person (id integer, name string)");
statement.executeUpdate("insert into person values(1, 'leo')");
statement.executeUpdate("insert into person values(2, 'yui')");

rs = statement.executeQuery("select * from person");
while(rs.next()):
    print "name = " + rs.getString("name")
    print "id = " + rs.getInt("id")

[Jeremy Faden]

I've spent some time with this this morning. Some commented code, claiming to be unneeded was needed, and single-jar releases support this now.

On webstart I get:
java.security.AccessControlException: java.security.AccessControlException: access denied ("java.io.FilePermission" "/home/jbf/autoplot_data/jython/org/apache/commons/math3/random/Well19937c.class" "read")

Here's the script I was using:

import sys

monitor.started()
d= 'http://central.maven.org/maven2/org/jcodec/'
addToSearchPath( sys.path,d+'jcodec/0.2.2/jcodec-0.2.2.jar',monitor.getSubtaskMonitor('load jar'))
addToSearchPath( sys.path,d+'jcodec-javase/0.2.2/jcodec-javase-0.2.2.jar',monitor.getSubtaskMonitor('load jar'))

from org.jcodec.api.awt import AWTSequenceEncoder
from org.jcodec.common.io import NIOUtils
from javax.imageio import ImageIO
from java.io import File

from org.jcodec.common.model import Rational
from org.jcodec.common.model import ColorSpace, Picture
from org.jcodec.common.Format import MOV,H264

enc = AWTSequenceEncoder.createSequenceEncoder(File("/tmp/filename.mp4"),24)
dir(enc)
dd= '/home/jbf/pngwalk/mms/'
ff= listDirectory(dd+'product_*.png')
monitor.setTaskSize(len(ff))
for f in ff:
   monitor.setProgressMessage( f )
   monitor.setTaskProgress( monitor.getTaskProgress() + 1 )
   img= ImageIO.read( File(dd+f) )
   enc.encodeImage(img)
enc.finish()
monitor.finished()

[Jeremy Faden]

I used this successfully when getting materials ready for Kris' AGU talk.

[Jeremy Faden]

This does not work with github releases, like https://github.com/jamesmudd/jhdf/releases/download/v0.8.3/jhdf-0.8.3.jar:

from java.io import File
import sys

jarfile= 'https://github.com/jamesmudd/jhdf/releases/download/v0.8.3/jhdf-0.8.3.jar'
docfile= 'https://github.com/jamesmudd/jhdf/releases/download/v0.8.3/jhdf-0.8.3-javadoc.jar'
addToSearchPath(sys.path,jarfile,docfile,monitor.getSubtaskMonitor('jhdf'))

[Jeremy Faden]

I fixed the problem with github releases, using downloadFileToTempFile when the FileSystem approach does not work.

[Jeremy Faden]

See also https://sourceforge.net/p/autoplot/bugs/2632/.