Dictionary migration in Java side.

Bug: 13406708

Change-Id: If83938e4b4810d2e8353c70cdd8ef3ea97a29571

1 files changed, 27 insertions, 0 deletions

diff --git a/java/src/com/android/inputmethod/latin/utils/BinaryDictionaryUtils.java b/java/src/com/android/inputmethod/latin/utils/BinaryDictionaryUtils.java
index 638830046..b4658b531 100644
--- a/java/src/com/android/inputmethod/latin/utils/BinaryDictionaryUtils.java
+++ b/java/src/com/android/inputmethod/latin/utils/BinaryDictionaryUtils.java
@@ -26,6 +26,8 @@ import java.io.File;
 import java.io.IOException;
 import java.util.Locale;
 import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 
 public final class BinaryDictionaryUtils {
     private static final String TAG = BinaryDictionaryUtils.class.getSimpleName();
@@ -64,6 +66,31 @@ public final class BinaryDictionaryUtils {
         return header;
     }
 
+    public static boolean renameDict(final File dictFile, final File newDictFile) {
+        if (dictFile.isFile()) {
+            return dictFile.renameTo(newDictFile);
+        } else if (dictFile.isDirectory()) {
+            final String dictName = dictFile.getName();
+            final String newDictName = newDictFile.getName();
+            if (newDictFile.exists()) {
+                return false;
+            }
+            for (final File file : dictFile.listFiles()) {
+                if (!file.isFile()) {
+                    continue;
+                }
+                final String fileName = file.getName();
+                final String newFileName = fileName.replaceFirst(
+                        Pattern.quote(dictName), Matcher.quoteReplacement(newDictName));
+                if (!file.renameTo(new File(dictFile, newFileName))) {
+                    return false;
+                }
+            }
+            return dictFile.renameTo(newDictFile);
+        }
+        return false;
+    }
+
     public static boolean createEmptyDictFile(final String filePath, final long dictVersion,
             final Locale locale, final Map<String, String> attributeMap) {
         final String[] keyArray = new String[attributeMap.size()];