import java.io.*;
import java.util.zip.*;

File attachedJarFile = new File( basedir, "jar-with-unusual.ext" );
System.out.println( "Checking for existence of " + attachedJarFile );
if ( !attachedJarFile.isFile() )
{
    throw new Exception( "missing " + attachedJarFile );
}

ZipFile attachedJar = new ZipFile( attachedJarFile );
System.out.println( "Checking for existence of " + attachedJarFile.getName() + "!/META-INF/TESTING.SF" );
if ( attachedJar.getEntry( "META-INF/TESTING.SF" ) == null )
{
    throw new Exception( "missing " + attachedJarFile.getName() + "!/META-INF/TESTING.SF" );
}
System.out.println( "Checking for existence of " + attachedJarFile.getName() + "!/META-INF/TESTING.DSA" );
if ( attachedJar.getEntry( "META-INF/TESTING.DSA" ) == null )
{
    throw new Exception( "missing " + attachedJarFile.getName() + "!/META-INF/TESTING.DSA" );
}
attachedJar.close();

File attachedZipFile = new File( basedir, "some.zip" );
System.out.println( "Checking for existence of " + attachedZipFile );
if ( !attachedZipFile.isFile() )
{
    throw new Exception( "missing " + attachedZipFile );
}

ZipFile attachedZip = new ZipFile( attachedZipFile );
System.out.println( "Checking for existence of " + attachedZipFile.getName() + "!/META-INF/TESTING.SF" );
if ( attachedZip.getEntry( "META-INF/TESTING.SF" ) == null )
{
    throw new Exception( "missing " + attachedZipFile.getName() + "!/META-INF/TESTING.SF" );
}
System.out.println( "Checking for existence of " + attachedZipFile.getName() + "!/META-INF/TESTING.DSA" );
if ( attachedZip.getEntry( "META-INF/TESTING.DSA" ) == null )
{
    throw new Exception( "missing " + attachedZipFile.getName() + "!/META-INF/TESTING.DSA" );
}
attachedZip.close();

return true;