1 files changed, 150 insertions, 0 deletions
diff --git a/service/java/com/android/server/deviceconfig/db/DeviceConfigDbAdapter.java b/service/java/com/android/server/deviceconfig/db/DeviceConfigDbAdapter.java
new file mode 100644
index 0000000..52ee5bd
--- /dev/null
+++ b/service/java/com/android/server/deviceconfig/db/DeviceConfigDbAdapter.java
@@ -0,0 +1,150 @@
+/*
+ * Copyright (C) 2023 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.server.deviceconfig.db;
+
+import android.content.ContentValues;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import android.text.TextUtils;
+
+import com.android.server.deviceconfig.db.DeviceConfigDbHelper.Contract.DeviceConfigEntry;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * @hide
+ */
+public class DeviceConfigDbAdapter {
+
+    private final SQLiteDatabase mDb;
+
+    public DeviceConfigDbAdapter(SQLiteDatabase db) {
+        mDb = db;
+    }
+
+    public Map<String, String> getValuesForNamespace(String namespace, String... keys) {
+
+        String[] projection = {
+                DeviceConfigEntry.COLUMN_NAME_KEY,
+                DeviceConfigEntry.COLUMN_NAME_VALUE
+        };
+
+        String selection;
+        String[] selectionArgs;
+        if (keys != null && keys.length > 0) {
+            selection = DeviceConfigEntry.COLUMN_NAME_NAMESPACE + " = ? "
+                    + "and " + DeviceConfigEntry.COLUMN_NAME_KEY + " in ( ? ) ";
+            String keySelection = TextUtils.join(",", keys);
+            selectionArgs = new String[]{namespace, keySelection};
+        } else {
+            selection = DeviceConfigEntry.COLUMN_NAME_NAMESPACE + " = ?";
+            selectionArgs = new String[]{namespace};
+        }
+        Cursor cursor = mDb.query(
+                DeviceConfigEntry.TABLE_NAME,
+                projection,
+                selection,
+                selectionArgs,
+                null,
+                null,
+                null
+        );
+
+        Map<String, String> map = new HashMap<>(cursor.getCount());
+        while (cursor.moveToNext()) {
+            String key = cursor.getString(
+                    cursor.getColumnIndexOrThrow(DeviceConfigEntry.COLUMN_NAME_KEY));
+            String value = cursor.getString(
+                    cursor.getColumnIndexOrThrow(DeviceConfigEntry.COLUMN_NAME_VALUE));
+            map.put(key, value);
+        }
+        cursor.close();
+        return map;
+    }
+
+    /**
+     *
+     * @return true if the data was inserted or updated in the database
+     */
+    private boolean insertOrUpdateValue_inTransaction(String namespace, String key, String value) {
+        // TODO(b/265948914): see if this is the most performant way to either insert or update a record
+        ContentValues values = new ContentValues();
+        values.put(DeviceConfigEntry.COLUMN_NAME_NAMESPACE, namespace);
+        values.put(DeviceConfigEntry.COLUMN_NAME_KEY, key);
+        values.put(DeviceConfigEntry.COLUMN_NAME_VALUE, value);
+
+        String where = DeviceConfigEntry.COLUMN_NAME_NAMESPACE + " = ? "
+                + "and " + DeviceConfigEntry.COLUMN_NAME_VALUE + " = ? ";
+
+        String[] whereArgs = {namespace, key};
+        int updatedRows = mDb.update(DeviceConfigEntry.TABLE_NAME, values, where, whereArgs);
+        if (updatedRows == 0) {
+            // this is a new row, we need to insert it
+            long id = mDb.insert(DeviceConfigEntry.TABLE_NAME, null, values);
+            return id != -1;
+        }
+        return updatedRows > 0;
+    }
+
+    /**
+     * Set or update the values in the map into the namespace.
+     *
+     * @return true if all values were set. Returns true if the map is empty.
+     */
+    public boolean setValues(String namespace, Map<String, String> map) {
+        if (map.size() == 0) {
+            return true;
+        }
+        boolean allSucceeded = true;
+        try {
+            mDb.beginTransaction();
+            for (Map.Entry<String, String> entry : map.entrySet()) {
+                // TODO(b/265948914) probably should call yieldIfContendedSafely in this loop
+                allSucceeded &= insertOrUpdateValue_inTransaction(namespace, entry.getKey(),
+                        entry.getValue());
+            }
+            mDb.setTransactionSuccessful();
+        } finally {
+            mDb.endTransaction();
+        }
+        return allSucceeded;
+    }
+
+    /**
+     *
+     * @return true if the value was set
+     */
+    public boolean setValue(String namespace, String key, String value, boolean makeDefault) {
+        HashMap<String, String> map = new HashMap<>();
+        map.put(key, value);
+        return setValues(namespace, map);
+        // TODO(b/265948914) implement make default!
+    }
+
+    /**
+     *
+     * @return true if any value was deleted
+     */
+    public boolean deleteValue(String namespace, String key) {
+        String where = DeviceConfigEntry.COLUMN_NAME_NAMESPACE + " = ? "
+                + "and " + DeviceConfigEntry.COLUMN_NAME_KEY + " = ? ";
+        String[] whereArgs = { namespace, key };
+        int count = mDb.delete(DeviceConfigEntry.TABLE_NAME, where, whereArgs);
+        return count > 0;
+    }
+}