/* * Copyright (C) 2015 Marten Gajda <[email protected]> * * 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 org.dmfs.provider.tasks.model.adapters; import android.content.ContentValues; import android.database.Cursor; /** * An abstract {@link FieldAdapter} that implements a couple of methods as used by most simple FieldAdapters. * * @author Marten Gajda <[email protected]> * * @param <FieldType> * The Type of the field this adapter handles. * * @param <EntityType> * The type of the entity the field belongs to. */ public abstract class SimpleFieldAdapter<FieldType, EntityType> implements FieldAdapter<FieldType, EntityType> { /** * Returns the sole field name of this adapter. * * @return */ abstract String fieldName(); @Override public boolean existsIn(ContentValues values) { return values.get(fieldName()) != null; } @Override public boolean isSetIn(ContentValues values) { return values.containsKey(fieldName()); } @Override public boolean existsIn(Cursor cursor) { int columnIdx = cursor.getColumnIndex(fieldName()); if (columnIdx < 0) { throw new IllegalArgumentException("The column '" + fieldName() + "' is missing in cursor."); } return !cursor.isNull(columnIdx); } @Override public FieldType getFrom(Cursor cursor, ContentValues values) { return values.containsKey(fieldName()) ? getFrom(values) : getFrom(cursor); } @Override public boolean existsIn(Cursor cursor, ContentValues values) { return existsIn(values) || existsIn(cursor); } @Override public void removeFrom(ContentValues values) { values.remove(fieldName()); } @Override public void copyValue(Cursor cursor, ContentValues values) { setIn(values, getFrom(cursor)); } @Override public void copyValue(ContentValues oldValues, ContentValues newValues) { setIn(newValues, getFrom(oldValues)); } }