67 lines
1.8 KiB
Java
67 lines
1.8 KiB
Java
package org.sufficientlysecure.keychain.provider;
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import java.util.ArrayList;
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import java.util.List;
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import android.arch.persistence.db.SupportSQLiteDatabase;
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import android.arch.persistence.db.SupportSQLiteQuery;
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import android.database.Cursor;
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import org.sufficientlysecure.keychain.provider.KeyRepository.NotFoundException;
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class AbstractDao {
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private final KeychainDatabase db;
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private final DatabaseNotifyManager databaseNotifyManager;
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AbstractDao(KeychainDatabase db, DatabaseNotifyManager databaseNotifyManager) {
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this.db = db;
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this.databaseNotifyManager = databaseNotifyManager;
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}
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SupportSQLiteDatabase getReadableDb() {
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return db.getReadableDatabase();
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}
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SupportSQLiteDatabase getWritableDb() {
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return db.getWritableDatabase();
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}
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DatabaseNotifyManager getDatabaseNotifyManager() {
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return databaseNotifyManager;
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}
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<T> List<T> mapAllRows(SupportSQLiteQuery query, Mapper<T> mapper) {
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ArrayList<T> result = new ArrayList<>();
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try (Cursor cursor = getReadableDb().query(query)) {
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while (cursor.moveToNext()) {
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T item = mapper.map(cursor);
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result.add(item);
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}
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}
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return result;
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}
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<T> T mapSingleRowOrThrow(SupportSQLiteQuery query, Mapper<T> mapper) throws NotFoundException {
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T result = mapSingleRow(query, mapper);
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if (result == null) {
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throw new NotFoundException();
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}
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return result;
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}
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<T> T mapSingleRow(SupportSQLiteQuery query, Mapper<T> mapper) {
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try (Cursor cursor = getReadableDb().query(query)) {
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if (cursor.moveToNext()) {
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return mapper.map(cursor);
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}
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}
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return null;
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}
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interface Mapper<T> {
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T map(Cursor cursor);
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}
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}
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