It's tip that write functional code on default script language of mybatis

mybatis.xml

Don't speak English well. Thank you for your patience.

It's functions xml file.
<mapper namespace="org.jacknie.mybatis.Functions">
    <sql id="isBlank">
        <bind name="isBlank" value=":[@org.apache.commons.lang3.StringUtils@isBlank(#this)]" />
    </sql>
    <sql id="sysout">
        <bind name="sysout" value=":[@System@out.println(#this)]" />
    </sql>
</mapper>

It's mapper xml file.
<mapper namespace="org.jacknie.test.TestMapper">
    <select id="selectTest" resultType="_int">
        <include refid="org.jacknie.mybatis.Functions.isBlank" />
        <include refid="org.jacknie.mybatis.Functions.sysout" />
        SELECT '1' FROM DUAL
        <if test="#fn = isBlank, not(#fn(map.name))">
            <bind name="forLogging" value="#fn = sysout, #fn('Hello' + map.name)" />
        </if>
    </select>
</mapper>

How about think this tip...