[RF1] Remove files that don't match the expected format, step 1

This implements the skeleton implementation, and enables a
fallback implementation in the case the file is coming from the
dictionary provider.
- A better scheme should be used for provider-supplied dicts.
- This does not implement the solution for device-generated
    dicts yet. This will come in a future change.
- This does not implement the checking process on the native
    side yet. This will come in a future change.

Bug: 11281748
Change-Id: Ifa6e237d19dfbffe503e3674915480ea867b0ddf

1 files changed, 13 insertions, 0 deletions

diff --git a/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp b/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
index c6a5900e7..87d482be1 100644
--- a/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
+++ b/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
@@ -135,6 +135,14 @@ static void latinime_BinaryDictionary_close(JNIEnv *env, jclass clazz, jlong dic
     delete dictionary;
 }
 
+static bool latinime_BinaryDictionary_hasValidContents(JNIEnv *env, jclass clazz,
+        jlong dict) {
+    Dictionary *dictionary = reinterpret_cast<Dictionary *>(dict);
+    if (!dictionary) return false;
+    // TODO: check format version
+    return true;
+}
+
 static int latinime_BinaryDictionary_getFormatVersion(JNIEnv *env, jclass clazz, jlong dict) {
     Dictionary *dictionary = reinterpret_cast<Dictionary *>(dict);
     if (!dictionary) return 0;
@@ -438,6 +446,11 @@ static const JNINativeMethod sMethods[] = {
         reinterpret_cast<void *>(latinime_BinaryDictionary_close)
     },
     {
+        const_cast<char *>("hasValidContentsNative"),
+        const_cast<char *>("(J)Z"),
+        reinterpret_cast<void *>(latinime_BinaryDictionary_hasValidContents)
+    },
+    {
         const_cast<char *>("getFormatVersionNative"),
         const_cast<char *>("(J)I"),
         reinterpret_cast<void *>(latinime_BinaryDictionary_getFormatVersion)