Always get a return value when using a custom interceptor for query

[chenmin...@gmail.com]

I am using spring boot 2.0.3.RELEASE. I tried to write an interceptor when the query is executed.When I finished writing, I found that although the code of the interceptor was implemented, I still couldn’t get the return value.

This  is the code.

```java

@Intercepts({

        @Signature(

                type = Executor.class,method = "query",

                args = {MappedStatement.class,Object.class,RowBounds.class,ResultHandler.class}

        )

})

@Component

public class PageInterceptor implements Interceptor {

    @Override

    public Object intercept(Invocation invocation) throws Throwable {

        final Object[] args = invocation.getArgs();

        ResultHandler handler = e ->{

            System.out.println(e.getResultObject());

        };

        args[3] =  handler;

        Object proceed = invocation.proceed();

        return proceed;

    }

    ...

}

```

The data is printed, but the result is empty.

When I debug the code i have some questions.This is the code of mybatis

```java

package org.apache.ibatis.executor.resultset;

DefaultResultSetHandler

private void handleResultSet(ResultSetWrapper rsw, ResultMap resultMap, List<Object> multipleResults, ResultMapping parentMapping) throws SQLException {

    try {

      if (parentMapping != null) {

        handleRowValues(rsw, resultMap, null, RowBounds.DEFAULT, parentMapping);

      } else {

        //When no ResultHandler is specified   multipleResults.add(defaultResultHandler.getResultList());

        if (resultHandler == null) {

          DefaultResultHandler defaultResultHandler = new DefaultResultHandler(objectFactory);

          handleRowValues(rsw, resultMap, defaultResultHandler, rowBounds, null);

          multipleResults.add(defaultResultHandler.getResultList());

        } else {

          //this  multipleResults is empty

          handleRowValues(rsw, resultMap, resultHandler, rowBounds, null);

        }

      }

    } finally {

      // issue #228 (close resultsets)

      closeResultSet(rsw.getResultSet());

    }

  }

```

I don't know if it is caused by this reason.When I specified the DefaultResultSetHandler.How to get the results?

[Erwan Letessier]

Custom ResultHandler here writes only in the console unlike default result handler that indirectly writes in a list that is eventually returned.

It would to know what you want to achieve by using interceptor.

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