Annotation for ContentProvider columns.

package android.provider;

public interface BaseColumns

{

import android.database.Cursor;

public interface BaseColumns {

    /**

     * The unique ID for a row.

     * <P>Type: INTEGER (long)</P>

     */

    @Column(Cursor.FIELD_TYPE_INTEGER)

    public static final String _ID = "_id";

    /**

     * The count of rows in a directory.

     * <P>Type: INTEGER</P>

     */

    // @Column(Cursor.FIELD_TYPE_INTEGER)

    public static final String _COUNT = "_count";

}

/*

 * Copyright (C) 2019 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 android.provider;

import static java.lang.annotation.ElementType.FIELD;

import static java.lang.annotation.RetentionPolicy.RUNTIME;

import android.content.ContentProvider;

import android.content.ContentValues;

import android.database.Cursor;

import java.lang.annotation.Documented;

import java.lang.annotation.Retention;

import java.lang.annotation.Target;

/**

 * Denotes that a field is a {@link ContentProvider} column. It can be used as a

 * key for {@link ContentValues} when inserting or updating data, or as a

 * projection when querying.

 *

 * @hide

 */

@Documented

@Retention(RUNTIME)

@Target({FIELD})

public @interface Column {

    /**

     * The {@link Cursor#getType(int)} of the data stored in this column.

     */

    int value();

    /**

     * This column is read-only and cannot be defined during insert or updates.

     */

    boolean readOnly() default false;

}