mybatis interceptor does not take effect after modifying sql re-set?

Mybatis use interceptors to do data rights management, sql intercept and analyze, modify and re-set. However, some take effect and some do not take effect. Information console printing means that all sql modifications are successful, then the problem lies in the method of re-set.

The beginning of this method are:

void setCurrentSql Private (Invo the Invocation, String SQL) { 
    MappedStatement mappedStatement = getMappedStatement (Invo); 
    Object [] args = invo.getArgs (); 
    Object args = paramObj [PARAM_OBJ_INDEX]; 
    BoundSql boundSql = mappedStatement.getBoundSql (paramObj); 
    ReflectUtil. SetFieldValue (boundSql, "sql", sql); 
} 

to modify the value of sql boundSql by reflection property, but there are problems. 
Then switch to this method:

private void setCurrentSql(Invocation invo, String sql) {
    BoundSql boundSql = getBoundSql(invo);
    List<ParameterMapping> parameterMappings = boundSql.
            getParameterMappings();
    Object paramObj = boundSql.getParameterObject();
    MappedStatement mappedStatement = getMappedStatement(invo);
    Configuration configuration = mappedStatement.getConfiguration();
    BoundSql newBoundSql = new BoundSql(configuration, sql,
            parameterMappings, paramObj);
    for (ParameterMapping parameterMapping : parameterMappings) {
        String prop = parameterMapping.getProperty();
        if (boundSql.hasAdditionalParameter(prop)) {
            Param = boundSql.getAdditionalParameter Object (prop); 
            newBoundSql.setAdditionalParameter (prop, param); 
        } 
    } 

    BoundSqlSource newSqlSource = new new BoundSqlSource (newBoundSql); 
    MappedStatement newMappedStatement = copyFromMappedStatement ( 
            mappedStatement, newSqlSource); 
    Object [] args = invo.getArgs () ; 
    args [MAPPED_STATEMENT_INDEX] = newMappedStatement; 
} 

problem is solved. There is also a method that looks more concise:

private void setCurrentSql(Invocation invo, String sql) {
    MappedStatement mappedStatement = getMappedStatement(invo);
    Object[] args = invo.getArgs();
    Object paramObj = args[PARAM_OBJ_INDEX];
    BoundSql boundSql = mappedStatement.getBoundSql(paramObj);
    BoundSqlSource boundSqlSource = new BoundSqlSource(boundSql);
    MappedStatement newMappedStatement = copyFromMappedStatement(
            mappedStatement, boundSqlSource);
    MetaObject metaObject = MetaObject.forObject(newMappedStatement,
            new DefaultObjectFactory(), new DefaultObjectWrapperFactory(),
            new DefaultReflectorFactory());
    metaObject.setValue("sqlSource.boundSql.sql", sql);
    args[MAPPED_STATEMENT_INDEX] = newMappedStatement;
}

上面用到的方法getMappedStatement：

private MappedStatement getMappedStatement(Invocation invo) {
    Object[] args = invo.getArgs();
    Object mappedStatement = args[MAPPED_STATEMENT_INDEX];
    return (MappedStatement) mappedStatement;
}

私有内部类BoundSqlSource:

private class BoundSqlSource implements SqlSource {

    private BoundSql boundSql;

    private BoundSqlSource(BoundSql boundSql) {
        this.boundSql = boundSql;
    }

    @Override
    public BoundSql getBoundSql(Object parameterObject) {
        return boundSql;
    }
}

另外还有：

private static final int MAPPED_STATEMENT_INDEX = 0;
private static final int PARAM_OBJ_INDEX = 1;