Use SevenZip Java LZMA compression library

build.xml

@@ -21,6 +21,7 @@
       <zipfileset src="lib/guava-11.0.1.jar" />
       <zipfileset src="lib/sfntly.jar" />
       <zipfileset src="lib/woffconverter.jar" />
+      <zipfileset src="lib/lzma.jar" />
       <manifest>
         <attribute name="Main-Class" value="com.google.typography.font.compression.CompressionRunner" />
       </manifest>

src/com/google/typography/font/compression/CompressLzma.java

@@ -2,21 +2,41 @@
 
 package com.google.typography.font.compression;
 
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+
+import SevenZip.Compression.LZMA.Encoder;
+
 /**
  * @author raph@google.com (Raph Levien)
  */
 public class CompressLzma {
-  // This is currently implemented by shelling out to a command line helper,
+
-  // which is fine for research purposes, but obviously problematic for
-  // production.
   public static byte[] compress(byte[] input) {
     try {
-      String[] args = {"/usr/bin/lzma"};
+      ByteArrayInputStream in = new ByteArrayInputStream(input);
-      CommandResult result = new Command(args).execute(input);
+      ByteArrayOutputStream out = new ByteArrayOutputStream();
-      return result.getStdout();
+
-    } catch (CommandException e) {
+      Encoder encoder = new Encoder();
+      encoder.SetAlgorithm(2);
+      encoder.SetDictionarySize(1 << 23);
+      encoder.SetNumFastBytes(128);
+      encoder.SetMatchFinder(1);
+      encoder.SetLcLpPb(3, 0, 2);
+      encoder.SetEndMarkerMode(true);
+      encoder.WriteCoderProperties(out);
+      for (int i = 0; i < 8; i++) {
+        out.write((int) ((long) -1 >>> (8 * i)) & 0xFF);
+      }
+      encoder.Code(in, out, -1, -1, null);
+
+      out.flush();
+      out.close();
+
+      return out.toByteArray();
+    } catch (IOException e) {
       throw new RuntimeException(e);
     }
   }
-
 }