Merge "Add allowRedundantMoreKeys attribute"

1 files changed, 47 insertions, 0 deletions

diff --git a/java/src/com/android/inputmethod/compat/CharacterCompat.java b/java/src/com/android/inputmethod/compat/CharacterCompat.java
new file mode 100644
index 000000000..609fe1638
--- /dev/null
+++ b/java/src/com/android/inputmethod/compat/CharacterCompat.java
@@ -0,0 +1,47 @@
+/*
+ * 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.compat;
+
+import java.lang.reflect.Method;
+
+public final class CharacterCompat {
+    // Note that Character.isAlphabetic(int), has been introduced in API level 19
+    // (Build.VERSION_CODE.KITKAT).
+    private static final Method METHOD_isAlphabetic = CompatUtils.getMethod(
+            Character.class, "isAlphabetic", int.class);
+
+    private CharacterCompat() {
+        // This utility class is not publicly instantiable.
+    }
+
+    public static boolean isAlphabetic(final int code) {
+        if (METHOD_isAlphabetic != null) {
+            return (Boolean)CompatUtils.invoke(null, false, METHOD_isAlphabetic, code);
+        }
+        switch (Character.getType(code)) {
+        case Character.UPPERCASE_LETTER:
+        case Character.LOWERCASE_LETTER:
+        case Character.TITLECASE_LETTER:
+        case Character.MODIFIER_LETTER:
+        case Character.OTHER_LETTER:
+        case Character.LETTER_NUMBER:
+            return true;
+        default:
+            return false;
+        }
+    }
+}