errors.md

Gotable error types

In this section, we introduce the error types defined in gotable. By default, we will still return the original Error interface. The following code demonstrates how to properly handle errors returned by gotable.

package main

import (
	"fmt"
	"github.com/liushuochen/gotable"
	"github.com/liushuochen/gotable/exception"
)

func main() {
	table, err := gotable.ReadFromJSONFile("cmd/fun.csv")
	if err != nil {
		switch err.(type) {
		case *exception.FileDoNotExistError:
			exp, _ := err.(*exception.FileDoNotExistError)
			fmt.Printf("file %s dot exit: %s", exp.Filename(), err.Error())
		default:
			fmt.Println(err.Error())
		}
		return
	}
	fmt.Println(table)
}

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FileDoNotExistError

This error type indicates that the filename was not found in the server. It has a public method *FileDoNotExistError.Filename() string that returns the wrong filename.

NotARegularCSVFileError

This error type indicates that the given filename is not a valid csv. It has a public method *NotARegularCSVFileError.Filename() string that returns the wrong CSV filename.

NotARegularJSONFileError

This error type indicates that the given filename is not a valid JSON. It has a public method *NotARegularJSONFileError.Filename() string that returns the wrong JSON filename.

NotGotableJSONFormatError

This error type indicates that the data format stored in the JSON file can not be parsed as a table. It has a public method *NotGotableJSONFormatError.Filename() string that returns the wrong JSON filename.

UnsupportedRowTypeError

This error type indicates that the row data structure is not support. It has a public method *UnsupportedRowTypeError.Type() string that returns the wrong type name.

ColumnsLengthError

This error type indicates that column's length not greater than 0.

ColumnDoNotExistError

A nonexistent column was found while adding a row. It has a public method *ColumnDoNotExistError.Name() string that returns the nonexistent column name.

RowLengthNotEqualColumnsError

This error is raised when adding a row from a Slice when the length of the Slice is not equal with the length of the table column.

UnSupportedFileTypeError

When the file type read is not supported. It has a public mnethod *UnSupportedFileTypeError.Filename() string that returns the wrong filename.