1 files changed, 89 insertions, 0 deletions
diff --git a/native/jni/src/dictionary/utils/entry_counters.h b/native/jni/src/dictionary/utils/entry_counters.h
new file mode 100644
index 000000000..5e443026e
--- /dev/null
+++ b/native/jni/src/dictionary/utils/entry_counters.h
@@ -0,0 +1,89 @@
+/*
+ * 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.
+ */
+
+#ifndef LATINIME_ENTRY_COUNTERS_H
+#define LATINIME_ENTRY_COUNTERS_H
+
+#include <array>
+
+#include "defines.h"
+#include "utils/ngram_utils.h"
+
+namespace latinime {
+
+// Copyable but immutable
+class EntryCounts final {
+ public:
+    EntryCounts() : mEntryCounts({{0, 0, 0, 0}}) {}
+
+    explicit EntryCounts(const std::array<int, MAX_PREV_WORD_COUNT_FOR_N_GRAM + 1> &counters)
+            : mEntryCounts(counters) {}
+
+    int getNgramCount(const NgramType ngramType) const {
+        return mEntryCounts[static_cast<int>(ngramType)];
+    }
+
+    const std::array<int, MAX_PREV_WORD_COUNT_FOR_N_GRAM + 1> &getCountArray() const {
+        return mEntryCounts;
+    }
+
+ private:
+    DISALLOW_ASSIGNMENT_OPERATOR(EntryCounts);
+
+    // Counts from Unigram (0-th element) to (MAX_PREV_WORD_COUNT_FOR_N_GRAM + 1)-gram
+    // (MAX_PREV_WORD_COUNT_FOR_N_GRAM-th element)
+    const std::array<int, MAX_PREV_WORD_COUNT_FOR_N_GRAM + 1> mEntryCounts;
+};
+
+class MutableEntryCounters final {
+ public:
+    MutableEntryCounters() {
+        mEntryCounters.fill(0);
+    }
+
+    explicit MutableEntryCounters(
+            const std::array<int, MAX_PREV_WORD_COUNT_FOR_N_GRAM + 1> &counters)
+            : mEntryCounters(counters) {}
+
+    const EntryCounts getEntryCounts() const {
+        return EntryCounts(mEntryCounters);
+    }
+
+    void incrementNgramCount(const NgramType ngramType) {
+        ++mEntryCounters[static_cast<int>(ngramType)];
+    }
+
+    void decrementNgramCount(const NgramType ngramType) {
+        --mEntryCounters[static_cast<int>(ngramType)];
+    }
+
+    int getNgramCount(const NgramType ngramType) const {
+        return mEntryCounters[static_cast<int>(ngramType)];
+    }
+
+    void setNgramCount(const NgramType ngramType, const int count) {
+        mEntryCounters[static_cast<int>(ngramType)] = count;
+    }
+
+ private:
+    DISALLOW_COPY_AND_ASSIGN(MutableEntryCounters);
+
+    // Counters from Unigram (0-th element) to (MAX_PREV_WORD_COUNT_FOR_N_GRAM + 1)-gram
+    // (MAX_PREV_WORD_COUNT_FOR_N_GRAM-th element)
+    std::array<int, MAX_PREV_WORD_COUNT_FOR_N_GRAM + 1> mEntryCounters;
+};
+} // namespace latinime
+#endif /* LATINIME_ENTRY_COUNTERS_H */