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FastChar-ExtJs is a Java Web framework that uses extjs libraries.
There is a newer version: 2.2.2
package com.fastchar.extjs.entity;

import com.fastchar.core.FastChar;
import com.fastchar.database.FastPage;
import com.fastchar.database.info.FastSqlInfo;
import com.fastchar.extjs.entity.abstracts.AbstractExtManagerRoleEntity;
import com.fastchar.utils.FastDateUtils;

public class ExtManagerRoleEntity extends AbstractExtManagerRoleEntity {
    private static final long serialVersionUID = 1L;

    public static ExtManagerRoleEntity getInstance() {
        return FastChar.getOverrides().singleInstance(ExtManagerRoleEntity.class);
    }

    public static ExtManagerRoleEntity dao() {
        return FastChar.getOverrides().singleInstance(ExtManagerRoleEntity.class);
    }
    public static ExtManagerRoleEntity newInstance() {
        return FastChar.getOverrides().newInstance(ExtManagerRoleEntity.class);
    }


    @Override
    public String getTableName() {
        return "ext_manager_role";
    }

    @Override
    public String getEntityCode() {
        return this.getClass().getSimpleName();
    }


    @Override
    public FastPage showList(int page, int pageSize) {
        String sqlStr = "select t.*,child.childCount," +
                " a.roleName as a__roleName," +
                " a.roleMenuPower as a__roleMenuPower," +
                " a.roleExtPower as a__roleExtPower " +
                " from ext_manager_role as t " +
                " left join ext_manager_role as a on a.roleId=t.parentRoleId " +
                " left join (select count(1) as childCount,parentRoleId from ext_manager_role group by parentRoleId) as child on child.parentRoleId=t.roleId ";

        FastSqlInfo sqlInfo = toSelectSql(sqlStr);
        FastPage select = selectBySql(page, pageSize, sqlInfo.getSql(), sqlInfo.toParams());
        for (ExtManagerRoleEntity extManagerRoleEntity : select.getList()) {
            extManagerRoleEntity.put("leaf", extManagerRoleEntity.getInt("childCount") == 0);
        }
        return select;
    }

    @Override
    public void setDefaultValue() {
        set("roleState", 0);
        set("parentRoleId", 0);
        set("roleMenuPower", "NONE");
        set("roleExtPower", "NONE");
        set("roleDateTime", FastDateUtils.getDateString());
    }

    @Override
    public boolean save() {
        ExtManagerRoleEntity parentRole = selectById(getParentRoleId());
        if (parentRole != null) {
            set("roleMenuPower", parentRole.getRoleMenuPower());
            set("roleExtPower", parentRole.getRoleExtPower());
        }
        if (checkName(getParentRoleId(), getRoleName())) {
            setError("同级别下的角色名称不能重复！");
            return false;
        }
        return super.save();
    }

    @Override
    public boolean delete() {
        if (getRoleId() == 1) {
            setError("禁止删除系统默认的【超级系统管理员】角色！");
            return false;
        }

        return super.delete();
    }


    @Override
    public boolean update() {
        if (isNotEmpty("roleName")) {
            ExtManagerRoleEntity managerRoleEntity = selectById(getId());
            if (checkName(managerRoleEntity.getParentRoleId(), getRoleName())) {
                setError("同级别下的角色名称不得重复！");
                return false;
            }
        }
        return super.update();
    }

    public enum RoleStateEnum {
        正常,
        禁用
    }

    public enum RoleTypeEnum{
        系统角色,
        普通角色
    }

    private boolean checkName(int parentId, String roleName) {
        String sqlStr = "select count(1) as c from ext_manager_role where parentRoleId = ? and roleName = ? ";
        ExtManagerRoleEntity result=selectFirstBySql(sqlStr,parentId,roleName);
        if (result != null) {
            return result.getInt("c") > 0;
        }
        return false;
    }
}