[Android]Android端ORM框架——RapidORM(v2.0)

2021-06-30 01:12:43



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来自天天博客：http://www.cnblogs.com/tiantianbyconan/p/5626716.html

[Android]Android端ORM框架——RapidORM(v2.0)

RapidORM：Android端轻量高性能的ORM框架

GitHub: https://github.com/wangjiegulu/RapidORM

1. RapidORM v1.0

v1.0博客文档：http://www.cnblogs.com/tiantianbyconan/p/4748077.html

v1.0版本支持使用反射和非反射（模版生成）两种方式实现执行SQL。

1.1. v1.0缺点：

  1. 其中默认为反射实现，对性能有一定的影响。

  2. 而如果要采用非反射实现，则需要使用RapidORM提供的模版工具类手动生成相关的帮助类，当数据表需要修改时，必须要手动手动生成帮助类，有潜在的风险。

  3. 非反射时生成的文件是通过getter/setter方法调用的，但是getter/setter方法名可能会不一致，导致需要手动调整setter/getter方法名称。

2. RapidORM v2.0

相比较于v1.0版本，v2.0版本则更加侧重于非反射操作，所有默认都是非反射的。

通过在编译时期根据@Table、@Column等注解自动生成辅助类Xxx_RORM.java文件，RapidORM库会使用这些生成的辅助类来进行数据表的初始化、执行SQL等操作，如果数据表有结构有改动，则会自动重新生成或者rebuild来手动生成。

2.1 v2.0 使用指南

与v1.0相同部分省略。

2.1.1 同样，创建持久类Person 

/**

 * Author: wangjie

 * Email: tiantian.china.2@gmail.com

 * Date: 6/25/15.

 */

@Table

public class Person implements Serializable {

    @Column(primaryKey = true)

    Integer id;

    @Column(primaryKey = true, name = "type_id")

    Integer typeId;

    @Column

    String name;

    @Column

    int age;

    @Column

    String address;

    @Column

    Long birth;

    @Column

    Boolean student;

    @Column(name = "is_succeed")

    boolean isSucceed;

    // getter/setter

}

注意，v2.0版本不支持变量为private类型，这是为了避免使用getter/setter方法来进行数据绑定。如果变量为private类型，则编译会报错，如下：

Error:Execution failed for task ':example:compileDebugJavaWithJavac'.

> java.lang.RuntimeException: id in com.wangjie.rapidorm.example.database.model.Person can not be private!

2.1.2 Rebuild Project

Android Studio -> Build -> Rebuild Project

Build成功后，在主项目build/generated/source/apt/目录下会生成Person_RORM类, 如下：

// GENERATED CODE BY RapidORM. DO NOT MODIFY! "2016-06-29 14:08:504", Source table: "com.wangjie.rapidorm.example.database.model.Person"

package com.wangjie.rapidorm.example.database.model;

import android.database.Cursor;

import com.wangjie.rapidorm.core.config.ColumnConfig;

import com.wangjie.rapidorm.core.config.TableConfig;

import java.util.List;

public class Person_RORM extends TableConfig<Person> {

  /**

   * Column name: "id", field name: {@link Person#id}

   */

  public static final String ID = "id";

  /**

   * Column name: "type_id", field name: {@link Person#typeId}

   */

  public static final String TYPE_ID = "type_id";

  /**

   * Column name: "name", field name: {@link Person#name}

   */

  public static final String NAME = "name";

  /**

   * Column name: "age", field name: {@link Person#age}

   */

  public static final String AGE = "age";

  /**

   * Column name: "address", field name: {@link Person#address}

   */

  public static final String ADDRESS = "address";

  /**

   * Column name: "birth", field name: {@link Person#birth}

   */

  public static final String BIRTH = "birth";

  /**

   * Column name: "student", field name: {@link Person#student}

   */

  public static final String STUDENT = "student";

  /**

   * Column name: "is_succeed", field name: {@link Person#isSucceed}

   */

  public static final String IS_SUCCEED = "is_succeed";

  public Person_RORM() {

    super(Person.class);

  }

  @Override

  protected void parseAllConfigs() {

    tableName = "Person";

    ColumnConfig idColumnConfig = buildColumnConfig("id"/*column name*/, false/*autoincrement*/, false/*notNull*/, ""/*defaultValue*/, false/*index*/, false/*unique*/, false/*uniqueCombo*/, true/*primaryKey*/, "INTEGER"/*dbType*/);

    allColumnConfigs.add(idColumnConfig);

    allFieldColumnConfigMapper.put("id"/*field name*/, idColumnConfig);

    pkColumnConfigs.add(idColumnConfig);

    ColumnConfig typeIdColumnConfig = buildColumnConfig("type_id"/*column name*/, false/*autoincrement*/, false/*notNull*/, ""/*defaultValue*/, false/*index*/, false/*unique*/, false/*uniqueCombo*/, true/*primaryKey*/, "INTEGER"/*dbType*/);

    allColumnConfigs.add(typeIdColumnConfig);

    allFieldColumnConfigMapper.put("typeId"/*field name*/, typeIdColumnConfig);

    pkColumnConfigs.add(typeIdColumnConfig);

    ColumnConfig nameColumnConfig = buildColumnConfig("name"/*column name*/, false/*autoincrement*/, false/*notNull*/, ""/*defaultValue*/, false/*index*/, false/*unique*/, false/*uniqueCombo*/, false/*primaryKey*/, "TEXT"/*dbType*/);

    allColumnConfigs.add(nameColumnConfig);

    allFieldColumnConfigMapper.put("name"/*field name*/, nameColumnConfig);

    noPkColumnConfigs.add(nameColumnConfig);

    ColumnConfig ageColumnConfig = buildColumnConfig("age"/*column name*/, false/*autoincrement*/, false/*notNull*/, ""/*defaultValue*/, false/*index*/, false/*unique*/, false/*uniqueCombo*/, false/*primaryKey*/, "INTEGER"/*dbType*/);

    allColumnConfigs.add(ageColumnConfig);

    allFieldColumnConfigMapper.put("age"/*field name*/, ageColumnConfig);

    noPkColumnConfigs.add(ageColumnConfig);

    ColumnConfig addressColumnConfig = buildColumnConfig("address"/*column name*/, false/*autoincrement*/, false/*notNull*/, ""/*defaultValue*/, false/*index*/, false/*unique*/, false/*uniqueCombo*/, false/*primaryKey*/, "TEXT"/*dbType*/);

    allColumnConfigs.add(addressColumnConfig);

    allFieldColumnConfigMapper.put("address"/*field name*/, addressColumnConfig);

    noPkColumnConfigs.add(addressColumnConfig);

    ColumnConfig birthColumnConfig = buildColumnConfig("birth"/*column name*/, false/*autoincrement*/, false/*notNull*/, ""/*defaultValue*/, false/*index*/, false/*unique*/, false/*uniqueCombo*/, false/*primaryKey*/, "LONG"/*dbType*/);

    allColumnConfigs.add(birthColumnConfig);

    allFieldColumnConfigMapper.put("birth"/*field name*/, birthColumnConfig);

    noPkColumnConfigs.add(birthColumnConfig);

    ColumnConfig studentColumnConfig = buildColumnConfig("student"/*column name*/, false/*autoincrement*/, false/*notNull*/, ""/*defaultValue*/, false/*index*/, false/*unique*/, false/*uniqueCombo*/, false/*primaryKey*/, "INTEGER"/*dbType*/);

    allColumnConfigs.add(studentColumnConfig);

    allFieldColumnConfigMapper.put("student"/*field name*/, studentColumnConfig);

    noPkColumnConfigs.add(studentColumnConfig);

    ColumnConfig isSucceedColumnConfig = buildColumnConfig("is_succeed"/*column name*/, false/*autoincrement*/, false/*notNull*/, ""/*defaultValue*/, false/*index*/, false/*unique*/, false/*uniqueCombo*/, false/*primaryKey*/, "INTEGER"/*dbType*/);

    allColumnConfigs.add(isSucceedColumnConfig);

    allFieldColumnConfigMapper.put("isSucceed"/*field name*/, isSucceedColumnConfig);

    noPkColumnConfigs.add(isSucceedColumnConfig);

  }

  @Override

  public void bindInsertArgs(Person model, List<Object> insertArgs) {

    Integer id = model.id;

    insertArgs.add(null == id ? null : id );

    Integer typeId = model.typeId;

    insertArgs.add(null == typeId ? null : typeId );

    String name = model.name;

    insertArgs.add(null == name ? null : name );

    int age = model.age;

    insertArgs.add(age);

    String address = model.address;

    insertArgs.add(null == address ? null : address );

    Long birth = model.birth;

    insertArgs.add(null == birth ? null : birth );

    Boolean student = model.student;

    insertArgs.add(null == student ? null : student  ? 1 : 0);

    boolean isSucceed = model.isSucceed;

    insertArgs.add(isSucceed ? 1 : 0);

  }

  @Override

  public void bindUpdateArgs(Person model, List<Object> updateArgs) {

    String name = model.name;

    updateArgs.add(null == name ? null : name);

    int age = model.age;

    updateArgs.add(age);

    String address = model.address;

    updateArgs.add(null == address ? null : address);

    Long birth = model.birth;

    updateArgs.add(null == birth ? null : birth);

    Boolean student = model.student;

    updateArgs.add(null == student ? null : student ? 1 : 0);

    boolean isSucceed = model.isSucceed;

    updateArgs.add(isSucceed ? 1 : 0);

  }

  @Override

  public void bindPkArgs(Person model, List<Object> pkArgs) {

    Integer id = model.id;

    pkArgs.add(null == id ? null : id);

    Integer typeId = model.typeId;

    pkArgs.add(null == typeId ? null : typeId);

  }

  @Override

  public Person parseFromCursor(Cursor cursor) {

    Person model = new Person();

    int index;

    index = cursor.getColumnIndex("id");

    if(-1 != index) {

      model.id = cursor.isNull(index) ? null : (cursor.getInt(index));

    }

    index = cursor.getColumnIndex("type_id");

    if(-1 != index) {

      model.typeId = cursor.isNull(index) ? null : (cursor.getInt(index));

    }

    index = cursor.getColumnIndex("name");

    if(-1 != index) {

      model.name = cursor.isNull(index) ? null : (cursor.getString(index));

    }

    index = cursor.getColumnIndex("age");

    if(-1 != index) {

      model.age = cursor.isNull(index) ? null : (cursor.getInt(index));

    }

    index = cursor.getColumnIndex("address");

    if(-1 != index) {

      model.address = cursor.isNull(index) ? null : (cursor.getString(index));

    }

    index = cursor.getColumnIndex("birth");

    if(-1 != index) {

      model.birth = cursor.isNull(index) ? null : (cursor.getLong(index));

    }

    index = cursor.getColumnIndex("student");

    if(-1 != index) {

      model.student = cursor.isNull(index) ? null : (cursor.getInt(index) == 1);

    }

    index = cursor.getColumnIndex("is_succeed");

    if(-1 != index) {

      model.isSucceed = cursor.isNull(index) ? null : (cursor.getInt(index) == 1);

    }

    return model;

  }

}

2.1.3 注册持久类

与v1.0一样，新建类DatabaseFactory，继承RapidORMConnection（可参考http://www.cnblogs.com/tiantianbyconan/p/4748077.html）。

需要注意的是需要实现的并不是原来的registerAllTableClass()方法，而是registerTableConfigMapper(HashMap<Class, TableConfig> tableConfigMapper)方法：

// ...

@Override

protected void registerTableConfigMapper(HashMap<Class, TableConfig> tableConfigMapper) {

    tableConfigMapper.put(Person.class, new Person_RORM());

    // register all table config here...

}

// ...

注意：注册Person时，需要连带生成的Person_RORM同时注册。

2.1.4 构建Builder

构建Builder时与v1.0的方式一致，但是可以直接使用Person_RORM中的static变量来作为column name：

PersonDaoImpl:

public List<Person> findPersonsByWhere() throws Exception {

    return queryBuilder()

            .addSelectColumn(Person_RORM.ID, Person_RORM.TYPE_ID, Person_RORM.NAME,

                    Person_RORM.AGE, Person_RORM.BIRTH, Person_RORM.ADDRESS)

            .setWhere(

            	Where.and(

	                Where.like(Person_RORM.NAME, "%wangjie%"),

	                Where.lt(Person_RORM.ID, 200),

	                Where.or(

	                        Where.between(Person_RORM.AGE, 19, 39),

	                        Where.isNull(Person_RORM.ADDRESS)

	                ),

	                Where.eq(Person_RORM.TYPE_ID, 1)

        		)

            )

            .addOrder(Person_RORM.ID, false)

            .addOrder(Person_RORM.NAME, true)

            .setLimit(10)

            .query(this);

}

2.1.5 兼容SqlCipher

与v1.0一致.

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