add complete java side of sqlite implementation

Mostly taken from https://www.sqlite.org/android which is forked from
AOSPs implementation

src/api-impl/android/database/sqlite/SQLiteDatabaseConfiguration.java

@@ -0,0 +1,177 @@
+/*
+ * Copyright (C) 2011 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.
+ */
+/*
+** Modified to support SQLite extensions by the SQLite developers: 
+** sqlite-dev@sqlite.org.
+*/
+
+package android.database.sqlite;
+
+import java.util.ArrayList;
+import java.util.Locale;
+import java.util.regex.Pattern;
+
+/**
+ * Describes how to configure a database.
+ * <p>
+ * The purpose of this object is to keep track of all of the little
+ * configuration settings that are applied to a database after it
+ * is opened so that they can be applied to all connections in the
+ * connection pool uniformly.
+ * </p><p>
+ * Each connection maintains its own copy of this object so it can
+ * keep track of which settings have already been applied.
+ * </p>
+ *
+ * @hide
+ */
+public final class SQLiteDatabaseConfiguration {
+	// The pattern we use to strip email addresses from database paths
+	// when constructing a label to use in log messages.
+	private static final Pattern EMAIL_IN_DB_PATTERN =
+			Pattern.compile("[\\w\\.\\-]+@[\\w\\.\\-]+");
+
+	/**
+	 * Special path used by in-memory databases.
+	 */
+	public static final String MEMORY_DB_PATH = ":memory:";
+
+	/**
+	 * The database path.
+	 */
+	public final String path;
+
+	/**
+	 * The label to use to describe the database when it appears in logs.
+	 * This is derived from the path but is stripped to remove PII.
+	 */
+	public final String label;
+
+	/**
+	 * The flags used to open the database.
+	 */
+	public int openFlags;
+
+	/**
+	 * The maximum size of the prepared statement cache for each database connection.
+	 * Must be non-negative.
+	 *
+	 * Default is 25.
+	 */
+	public int maxSqlCacheSize;
+
+	/**
+	 * The database locale.
+	 *
+	 * Default is the value returned by {@link Locale#getDefault()}.
+	 */
+	public Locale locale;
+
+	/**
+	 * True if foreign key constraints are enabled.
+	 *
+	 * Default is false.
+	 */
+	public boolean foreignKeyConstraintsEnabled;
+
+	/**
+	 * The custom functions to register.
+	 */
+	public final ArrayList<SQLiteCustomFunction> customFunctions =
+			new ArrayList<SQLiteCustomFunction>();
+
+	/**
+	 * Creates a database configuration with the required parameters for opening a
+	 * database and default values for all other parameters.
+	 *
+	 * @param path The database path.
+	 * @param openFlags Open flags for the database, such as {@link SQLiteDatabase#OPEN_READWRITE}.
+	 */
+	public SQLiteDatabaseConfiguration(String path, int openFlags) {
+		if (path == null) {
+			throw new IllegalArgumentException("path must not be null.");
+		}
+
+		this.path = path;
+		label = stripPathForLogs(path);
+		this.openFlags = openFlags;
+
+		// Set default values for optional parameters.
+		maxSqlCacheSize = 25;
+		locale = Locale.getDefault();
+	}
+
+	/**
+	 * Creates a database configuration as a copy of another configuration.
+	 *
+	 * @param other The other configuration.
+	 */
+	public SQLiteDatabaseConfiguration(SQLiteDatabaseConfiguration other) {
+		if (other == null) {
+			throw new IllegalArgumentException("other must not be null.");
+		}
+
+		this.path = other.path;
+		this.label = other.label;
+		updateParametersFrom(other);
+	}
+
+	/**
+	 * Updates the non-immutable parameters of this configuration object
+	 * from the other configuration object.
+	 *
+	 * @param other The object from which to copy the parameters.
+	 */
+	public void updateParametersFrom(SQLiteDatabaseConfiguration other) {
+		if (other == null) {
+			throw new IllegalArgumentException("other must not be null.");
+		}
+		if (!path.equals(other.path)) {
+			throw new IllegalArgumentException("other configuration must refer to "
+					+ "the same database.");
+		}
+
+		openFlags = other.openFlags;
+		maxSqlCacheSize = other.maxSqlCacheSize;
+		locale = other.locale;
+		foreignKeyConstraintsEnabled = other.foreignKeyConstraintsEnabled;
+		customFunctions.clear();
+		customFunctions.addAll(other.customFunctions);
+	}
+
+	/**
+	 * Returns true if the database is in-memory.
+	 * @return True if the database is in-memory.
+	 */
+	public boolean isInMemoryDb() {
+		return path.equalsIgnoreCase(MEMORY_DB_PATH);
+	}
+
+	private static String stripPathForLogs(String path) {
+		/* Strip off all URI parameters. This is in case a SEE database is
+		 * opened with the password specified as a URI parameter. We do not
+		 * want the password to appear in any log files.  */
+		int iIdx = path.indexOf('?');
+		if( iIdx>=0 ){
+			path = (String) path.subSequence(0, iIdx);
+		}
+
+		if (path.indexOf('@') == -1) {
+			return path;
+		}
+		return EMAIL_IN_DB_PATTERN.matcher(path).replaceAll("XX@YY");
+	}
+}