From 5339b9050a1e2bae6b8013f72e1a4e43f940290c Mon Sep 17 00:00:00 2001
From: Paul Duncan <pabs@pablotron.org>
Date: Wed, 31 Aug 2016 19:05:56 -0400
Subject: add java, refactor ruby

---
 .gitignore       |   2 ++
 JavaCSVTest.java |  29 +++++++++++++++++++++++++++++
 README.txt       |   3 +++
 bench.rb         |   4 ++++
 opencsv-2.3.jar  | Bin 0 -> 19526 bytes
 rb-test.rb       |  12 +++++++++---
 results.txt      |   8 ++++----
 7 files changed, 51 insertions(+), 7 deletions(-)
 create mode 100644 JavaCSVTest.java
 create mode 100644 opencsv-2.3.jar

diff --git a/.gitignore b/.gitignore
index 72699f7..a9ab7de 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,3 @@
 /*.csv
+/*.class
+/cr-test
diff --git a/JavaCSVTest.java b/JavaCSVTest.java
new file mode 100644
index 0000000..91ee366
--- /dev/null
+++ b/JavaCSVTest.java
@@ -0,0 +1,29 @@
+import au.com.bytecode.opencsv.CSVReader;
+import au.com.bytecode.opencsv.CSVWriter;
+import java.io.FileReader;
+import java.io.FileWriter;
+
+public class JavaCSVTest {
+  private static String[] concat(final String a[], final String b[]) {
+    final String r[] = new String[a.length + b.length];
+
+    System.arraycopy(a, 0, r, 0, a.length);
+    System.arraycopy(b, 0, r, a.length, b.length);
+
+    return r;
+  }
+
+  private static final String FOO[] = { "foo", "foo" };
+
+  public static void main(String args[]) throws Exception {
+    final String src_path = args[0], dst_path = args[1];
+    final CSVReader src = new CSVReader(new FileReader(src_path));
+    final CSVWriter dst = new CSVWriter(new FileWriter(dst_path));
+
+    String row[];
+    while ((row = src.readNext()) != null)
+      dst.writeNext(concat(row, FOO));
+
+    dst.close();
+  }
+}
diff --git a/README.txt b/README.txt
index 1dd6cd9..a82d866 100644
--- a/README.txt
+++ b/README.txt
@@ -5,5 +5,8 @@ Setup:
   # compile crystal test
   crystal build --release cr-test.cr
 
+  # compile java test
+  javac -cp opencsv-2.3.jar JavaCSVTest.java
+
   # compare tests
   ./bench.rb
diff --git a/bench.rb b/bench.rb
index 83f4113..ea983b3 100755
--- a/bench.rb
+++ b/bench.rb
@@ -7,6 +7,10 @@ Benchmark.bm(5) do |bm|
     `python2.7 ./py-test.py test.csv out.csv`
   end
 
+  bm.report('java') do
+    `java -cp opencsv-2.3.jar:. JavaCSVTest test.csv out.csv`
+  end
+
   bm.report('ruby') do
     `ruby ./rb-test.rb test.csv out.csv`
   end
diff --git a/opencsv-2.3.jar b/opencsv-2.3.jar
new file mode 100644
index 0000000..31fcf30
Binary files /dev/null and b/opencsv-2.3.jar differ
diff --git a/rb-test.rb b/rb-test.rb
index 973c8cf..4bd2e57 100644
--- a/rb-test.rb
+++ b/rb-test.rb
@@ -5,8 +5,14 @@ require 'csv'
 # get paths
 src_path, dst_path = ARGV
 
-CSV.open(dst_path, 'wb') do |dst|
-  CSV.foreach(src_path) do |row|
-    dst << (row += %w{foo} * 2)
+File.open(dst_path, 'wb') do |dst_file|
+  CSV(dst_file) do |dst|
+    File.open(src_path, 'rb') do |src_file|
+      CSV(src_file) do |src|
+        src.each do |row|
+          dst << row + (%w{foo} * 2)
+        end
+      end
+    end
   end
 end
diff --git a/results.txt b/results.txt
index 4b530e6..9d1efd3 100644
--- a/results.txt
+++ b/results.txt
@@ -1,5 +1,5 @@
-pabs@meh:~/git/csv-test> ./bench.rb
             user     system      total        real
-python  0.000000   0.000000  15.620000 ( 15.862860)
-ruby    0.000000   0.000000 139.730000 (140.269987)
-crystal  0.000000   0.000000  13.300000 ( 13.153701)
+python  0.000000   0.000000  15.170000 ( 15.388455)
+java    0.000000   0.000000   7.680000 (  7.818470)
+ruby    0.000000   0.000000 132.520000 (133.027950)                             
+crystal  0.000000   0.000000  13.530000 ( 13.249648)
-- 
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