Add Java language to compiler_vm

modules/compiler_vm/languages/java.pm

@@ -0,0 +1,18 @@
+#!/usr/bin/env perl
+
+use warnings;
+use strict;
+
+package java;
+use parent '_default';
+
+sub initialize {
+  my ($self, %conf) = @_;
+
+  $self->{sourcefile}      = 'prog.java';
+  $self->{execfile}        = 'prog';
+  $self->{default_options} = '';
+  $self->{cmdline}         = 'javac $options $sourcefile';
+}
+
+1;

modules/compiler_vm/languages/server/java.pm

@@ -0,0 +1,41 @@
+#!/usr/bin/perl
+
+use warnings;
+use strict;
+
+package java; 
+use parent '_default';
+
+sub postprocess {
+  my $self = shift;
+
+  # no errors compiling, but if output contains something, it must be diagnostic messages
+  if(length $self->{output}) {
+    $self->{output} =~ s/^\s+//;
+    $self->{output} =~ s/\s+$//;
+    $self->{output} = "[$self->{output}]\n";
+  }
+
+  print "Executing java\n";
+  my $input_quoted = quotemeta $self->{input};
+  $input_quoted =~ s/\\"/"'\\"'"/g;
+  my ($retval, $result) = $self->execute(60, "bash -c \"date -s \@$self->{date}; ulimit -t 1; echo $input_quoted | java prog > .output\"");
+
+  $result = "";
+  open(FILE, '.output');
+  while(<FILE>) {
+    $result .= $_;
+    last if length $result >= 1024 * 20;
+  }
+  close(FILE);
+
+  $result =~ s/\s+$//;
+
+  if (not length $result) {
+    $self->{no_output} = 1;
+  }
+
+  $self->{output} .= $result;
+}
+
+1;