Simple XML validity checker using the `dom` module

Redefined classes

redef class Sys

dom :: checker $ Sys

The main class of the program.

All class definitions

redef class Sys

dom :: checker $ Sys

The main class of the program.

Ancestors

module abstract_collection

core :: abstract_collection

Abstract collection classes and services.

module abstract_text

core :: abstract_text

Abstract class for manipulation of sequences of characters

module array

This module introduces the standard array structure.

module bitset

Services to handle BitSet

module bytes

Services for byte streams and arrays

module caching

serialization :: caching

Services for caching serialization engines

module circular_array

core :: circular_array

Efficient data structure to access both end of the sequence.

module codec_base

core :: codec_base

Base for codecs to use with streams

module codecs

Group module for all codec-related manipulations

module collection

core :: collection

This module define several collection classes.

module core

Standard classes and methods used by default by Nit programs and libraries.

module engine_tools

serialization :: engine_tools

Advanced services for serialization engines

module environ

core :: environ

Access to the environment variables of the process

module error

Standard error-management infrastructure.

module exec

Invocation and management of operating system sub-processes.

module file

File manipulations (create, read, write, etc.)

module fixed_ints

core :: fixed_ints

Basic integers of fixed-precision

module fixed_ints_text

core :: fixed_ints_text

Text services to complement fixed_ints

module flat

All the array-based text representations

module gc

Access to the Nit internal garbage collection mechanism

module hash_collection

core :: hash_collection

Introduce HashMap and HashSet.

module inspect

serialization :: inspect

Refine Serializable::inspect to show more useful information

module iso8859_1

core :: iso8859_1

Codec for ISO8859-1 I/O

module kernel

Most basic classes and methods.

module list

This module handle double linked lists

module math

Mathematical operations

module meta

Simple user-defined meta-level to manipulate types of instances as object.

module native

Native structures for text and bytes

module numeric

core :: numeric

Advanced services for Numeric types

module parser

XML DOM-parsing facilities

module parser_base

parser_base :: parser_base

Simple base for hand-made parsers of all kinds

module protocol

core :: protocol

module queue

Queuing data structures and wrappers

module range

Module for range of discrete objects.

module re

Regular expression support for all services based on Pattern

module ropes

Tree-based representation of a String.

module serialization

serialization :: serialization

General serialization services

module serialization_core

serialization :: serialization_core

Abstract services to serialize Nit objects to different formats

module sorter

This module contains classes used to compare things and sorts arrays.

module stream

Input and output streams of characters

module string_search

core :: string_search

Basic string search, match and replace.

module text

All the classes and methods related to the manipulation of text entities

module time

Management of time and dates

module union_find

core :: union_find

union–find algorithm using an efficient disjoint-set data structure

module utf8

Codec for UTF-8 I/O

module xml_entities

dom :: xml_entities

Basic blocks for DOM-XML representation

Parents

module dom

Easy XML DOM parser

Children

module a_star-m

# Simple XML validity checker using the `dom` module
module checker is example

import dom

# Check arguments
if args.length != 1 then
	print_error "Usage: checker xml_file"
	exit 2
end

var path = args.first
if not path.file_exists then
	print_error "Path '{path}' does not exist"
	exit 3
end

# Read file
var content = path.to_path.read_all

# Parse XML
var xml = content.to_xml

# Check for errors
if xml isa XMLError then
	print_error "XML file at '{path}' is invalid:"
	print_error xml.message
	var loc = xml.location
	if loc != null then print_error loc
	exit 1
else
	print "XML file at '{path}' is valid"
end

lib/dom/examples/checker.nit:11,1--43,3