Separate utility methods from BinaryDictionary.

Bug: 8187060
Change-Id: Ice2984e332b7bd3bb17174aefc80b5635b72fc50

1 files changed, 85 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
new file mode 100644
index 000000000..6872285ad
--- /dev/null
+++ b/java/src/com/android/inputmethod/latin/utils/BinaryDictionaryUtils.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2014 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.utils;
+
+import com.android.inputmethod.annotations.UsedForTesting;
+import com.android.inputmethod.latin.personalization.PersonalizationHelper;
+
+import java.util.Locale;
+import java.util.Map;
+
+public final class BinaryDictionaryUtils {
+    private static final String TAG = BinaryDictionaryUtils.class.getSimpleName();
+
+    private BinaryDictionaryUtils() {
+        // This utility class is not publicly instantiable.
+    }
+
+    static {
+        JniUtils.loadNativeLibrary();
+    }
+
+    private static native boolean createEmptyDictFileNative(String filePath, long dictVersion,
+            String locale, String[] attributeKeyStringArray, String[] attributeValueStringArray);
+    private static native float calcNormalizedScoreNative(int[] before, int[] after, int score);
+    private static native int editDistanceNative(int[] before, int[] after);
+    private static native int setCurrentTimeForTestNative(int currentTime);
+
+    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()];
+        final String[] valueArray = new String[attributeMap.size()];
+        int index = 0;
+        for (final String key : attributeMap.keySet()) {
+            keyArray[index] = key;
+            valueArray[index] = attributeMap.get(key);
+            index++;
+        }
+        return createEmptyDictFileNative(filePath, dictVersion, locale.toString(), keyArray,
+                valueArray);
+    }
+
+    public static float calcNormalizedScore(final String before, final String after,
+            final int score) {
+        return calcNormalizedScoreNative(StringUtils.toCodePointArray(before),
+                StringUtils.toCodePointArray(after), score);
+    }
+
+    public static int editDistance(final String before, final String after) {
+        if (before == null || after == null) {
+            throw new IllegalArgumentException();
+        }
+        return editDistanceNative(StringUtils.toCodePointArray(before),
+                StringUtils.toCodePointArray(after));
+    }
+
+    /**
+     * Control the current time to be used in the native code. If currentTime >= 0, this method sets
+     * the current time and gets into test mode.
+     * In test mode, set timestamp is used as the current time in the native code.
+     * If currentTime < 0, quit the test mode and returns to using time() to get the current time.
+     *
+     * @param currentTime seconds since the unix epoch
+     * @return current time got in the native code.
+     */
+    @UsedForTesting
+    public static int setCurrentTimeForTest(final int currentTime) {
+        final int currentNativeTimestamp = setCurrentTimeForTestNative(currentTime);
+        PersonalizationHelper.currentTimeChangedForTesting(currentNativeTimestamp);
+        return currentNativeTimestamp;
+    }
+}