package org.nutz.dao.impl.jdbc.sqlite;
import java.util.List;
import org.nutz.dao.DB;
import org.nutz.dao.Dao;
import org.nutz.dao.Sqls;
import org.nutz.dao.entity.Entity;
import org.nutz.dao.entity.MappingField;
import org.nutz.dao.entity.PkType;
import org.nutz.dao.impl.entity.macro.SqlFieldMacro;
import org.nutz.dao.impl.jdbc.mysql.MysqlJdbcExpert;
import org.nutz.dao.jdbc.JdbcExpertConfigFile;
import org.nutz.dao.sql.Pojo;
import org.nutz.dao.sql.Sql;
/**
*
* @author wendal
*/
public class SQLiteJdbcExpert extends MysqlJdbcExpert {
public SQLiteJdbcExpert(JdbcExpertConfigFile conf) {
super(conf);
}
@Override
public String getDatabaseType() {
return DB.SQLITE.name();
}
@Override
public boolean createEntity(Dao dao, Entity<?> en) {
StringBuilder sb = new StringBuilder("CREATE TABLE " + en.getTableName() + "(");
if (en.getPks().size() > 1 && en.getPkType() == PkType.ID) {
return false;
}
// 创建字段
boolean mPks = en.getPks().size() > 1;
for (MappingField mf : en.getMappingFields()) {
sb.append('\n').append(mf.getColumnName());
// Sqlite的整数型主键,一般都是自增的,必须定义为(PRIMARY KEY
// AUTOINCREMENT),但这样就无法定义多主键!!
if (mf.isId() && en.getPkType() == PkType.ID) {
sb.append(" INTEGER PRIMARY KEY AUTOINCREMENT,");
continue;
} else
sb.append(' ').append(evalFieldType(mf));
// 非主键的 @Name，应该加入唯一性约束
if (mf.isName() && en.getPkType() != PkType.NAME) {
sb.append(" UNIQUE NOT NULL");
}
// 普通字段
else {
if (mf.isUnsigned())
sb.append(" UNSIGNED");
if (mf.isNotNull())
sb.append(" NOT NULL");
if (mf.isPk() && !mPks) {// 复合主键需要另外定义
sb.append(" PRIMARY KEY");
}
if (mf.hasDefaultValue())
sb.append(" DEFAULT '").append(getDefaultValue(mf)).append('\'');
}
sb.append(',');
}
// 创建主键
List<MappingField> pks = en.getPks();
if (mPks) {
sb.append('\n');
sb.append("constraint pk_").append(en.getTableName()).append(" PRIMARY KEY (");
for (MappingField pk : pks) {
sb.append(pk.getColumnName()).append(',');
}
sb.setCharAt(sb.length() - 1, ')');
sb.append("\n ");
}
// 创建索引
dao.execute(createIndexs(en).toArray(new Sql[0]));
// 结束表字段设置
sb.setCharAt(sb.length() - 1, ')');
// 执行创建语句
dao.execute(Sqls.create(sb.toString()));
// 创建关联表
createRelation(dao, en);
return true;
}
public Pojo fetchPojoId(Entity<?> en, MappingField idField) {
String autoSql = "SELECT MAX($field) AS $field FROM $view";
Pojo autoInfo = new SqlFieldMacro(idField, autoSql);
autoInfo.setEntity(en);
return autoInfo;
}
}