Add the unpackage command

Bug: 7388852
Change-Id: I7e5376f5d646e669884ef78e4e0dee62c99d4d6b

tools/dicttool/src/com/android/inputmethod/latin/dicttool/CommandList.java

@@ -24,6 +24,8 @@ public class CommandList {
         Dicttool.addCommand("uncompress", Compress.Uncompressor.class);
         Dicttool.addCommand("encrypt", Crypt.Encrypter.class);
         Dicttool.addCommand("decrypt", Crypt.Decrypter.class);
+        Dicttool.addCommand("package", Package.Packager.class);
+        Dicttool.addCommand("unpackage", Package.Unpackager.class);
         Dicttool.addCommand("makedict", Makedict.class);
     }
 }

tools/dicttool/src/com/android/inputmethod/latin/dicttool/Compress.java

@@ -28,6 +28,9 @@ import java.util.zip.GZIPInputStream;
 import java.util.zip.GZIPOutputStream;
 
 public class Compress {
+    private Compress() {
+        // This container class is not publicly instantiable.
+    }
 
     public static OutputStream getCompressedStream(final OutputStream out)
         throws java.io.IOException {

tools/dicttool/src/com/android/inputmethod/latin/dicttool/Crypt.java

@@ -20,6 +20,10 @@ import java.io.InputStream;
 import java.io.OutputStream;
 
 public class Crypt {
+    private Crypt() {
+        // This container class is not publicly instantiable.
+    }
+
     public static OutputStream getCryptedStream(final OutputStream out) {
         // Encryption is not supported
         return out;

tools/dicttool/src/com/android/inputmethod/latin/dicttool/Package.java

@@ -0,0 +1,78 @@
+/**
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package com.android.inputmethod.latin.dicttool;
+
+import java.io.BufferedInputStream;
+import java.io.BufferedOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.InputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+
+public class Package {
+    private Package() {
+        // This container class is not publicly instantiable.
+    }
+
+    static public class Packager extends Dicttool.Command {
+        public static final String COMMAND = "package";
+
+        public Packager() {
+        }
+
+        public String getHelp() {
+            return COMMAND + " <src_filename> <dst_filename>: Package a file for distribution";
+        }
+
+        public void run() {
+            // Not implemented yet
+            throw new UnsupportedOperationException();
+        }
+    }
+
+    static public class Unpackager extends Dicttool.Command {
+        public static final String COMMAND = "unpackage";
+
+        public Unpackager() {
+        }
+
+        public String getHelp() {
+            return COMMAND + " <src_filename> <dst_filename>: Detects how a file is packaged and\n"
+                    + "decrypts/uncompresses as necessary to produce a raw binary file.";
+        }
+
+        public void run() throws FileNotFoundException, IOException {
+            if (mArgs.length != 2) {
+                throw new RuntimeException("Too many/too few arguments for command " + COMMAND);
+            }
+            final BinaryDictOffdeviceUtils.DecoderChainSpec decodedSpec =
+                    BinaryDictOffdeviceUtils.getRawBinaryDictionaryOrNull(new File(mArgs[0]));
+            if (null == decodedSpec) {
+                System.out.println(mArgs[0] + " does not seem to be a dictionary");
+                return;
+            }
+            System.out.println("Packaging : " + decodedSpec.describeChain());
+            System.out.println("Uncompressed size : " + decodedSpec.mFile.length());
+            final FileOutputStream dstStream = new FileOutputStream(new File(mArgs[1]));
+            BinaryDictOffdeviceUtils.copy(new BufferedInputStream(
+                    new FileInputStream(decodedSpec.mFile)), new BufferedOutputStream(dstStream));
+        }
+    }
+}