harmony 鸿蒙@ohos.convertxml (XML-to-JavaScript Conversion)

2022-08-09
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@ohos.convertxml (XML-to-JavaScript Conversion)

The convertxml module provides APIs for converting XML text into JavaScript objects.

NOTE

The initial APIs of this module are supported since API version 8. Newly added APIs will be marked with a superscript to indicate their earliest API version.

Modules to Import

import convertxml from '@ohos.convertxml';

ConvertXML

convertToJSObject⁹⁺

convertToJSObject(xml: string, options?: ConvertOptions) : Object

Converts an XML text into a JavaScript object.

System capability: SystemCapability.Utils.Lang

Parameters

Name	Type	Mandatory	Description
xml	string	Yes	XML text to convert.
options	ConvertOptions	No	Options for conversion. The default value is a ConvertOptions object, which consists of the default values of the attributes in the object.

Return value

Type	Description
Object	JavaScript object.

Error codes

For details about the error codes, see Utils Error Codes.

ID	Error Message
10200002	Invalid xml string.

Example

try {
  let xml =
    '<?xml version="1.0" encoding="utf-8"?>' +
      '<note importance="high" logged="true">' +
      '    <title>Happy</title>' +
      '    <todo>Work</todo>' +
      '    <todo>Play</todo>' +
      '</note>';
  let conv = new convertxml.ConvertXML()
  let options: convertxml.ConvertOptions = {
    trim: false, declarationKey: "_declaration",
    instructionKey: "_instruction", attributesKey: "_attributes",
    textKey: "_text", cdataKey: "_cdata", doctypeKey: "_doctype",
    commentKey: "_comment", parentKey: "_parent", typeKey: "_type",
    nameKey: "_name", elementsKey: "_elements"
  }
  let result = JSON.stringify(conv.convertToJSObject(xml, options));
  console.log(result);
} catch (e) {
  console.log((e as Object).toString());
}
// Output (non-compact)
// {"_declaration":{"_attributes":{"version":"1.0","encoding":"utf-8"}},"_elements":[{"_type":"element","_name":"note","_attributes":{"importance":"high","logged":"true"},"_elements":[{"_type":"element","_name":"title","_elements":[{"_type":"text","_text":"Happy"}]},{"_type":"element","_name":"todo","_elements":[{"_type":"text","_text":"Work"}]},{"_type":"element","_name":"todo","_elements":[{"_type":"text","_text":"Play"}]}]}]}

convert^(deprecated)

convert(xml: string, options?: ConvertOptions) : Object

Converts an XML text into a JavaScript object.

NOTE

This API is supported since API version 8 and deprecated since API version 9. You are advised to use convertToJSObject⁹⁺ instead.

System capability: SystemCapability.Utils.Lang

Parameters

Name	Type	Mandatory	Description
xml	string	Yes	XML text to convert.
options	ConvertOptions	No	Options for conversion. The default value is a ConvertOptions object, which consists of the default values of the attributes in the object.

Return value

Type	Description
Object	JavaScript object.

Example

let xml =
  '<?xml version="1.0" encoding="utf-8"?>' +
    '<note importance="high" logged="true">' +
    '    <title>Happy</title>' +
    '    <todo>Work</todo>' +
    '    <todo>Play</todo>' +
    '</note>';
let conv = new convertxml.ConvertXML();
let options: convertxml.ConvertOptions = {trim : false, declarationKey:"_declaration",
  instructionKey : "_instruction", attributesKey : "_attributes",
  textKey : "_text", cdataKey:"_cdata", doctypeKey : "_doctype",
  commentKey : "_comment", parentKey : "_parent", typeKey : "_type",
  nameKey : "_name", elementsKey : "_elements"}
let result = JSON.stringify(conv.convert(xml, options));
console.log(result);
// Output (non-compact)
// {"_declaration":{"_attributes":{"version":"1.0","encoding":"utf-8"}},"_elements":[{"_type":"element","_name":"note","_attributes":{"importance":"high","logged":"true"},"_elements":[{"_type":"element","_name":"title","_elements":[{"_type":"text","_text":"Happy"}]},{"_type":"element","_name":"todo","_elements":[{"_type":"text","_text":"Work"}]},{"_type":"element","_name":"todo","_elements":[{"_type":"text","_text":"Play"}]}]}]}

ConvertOptions

Options for conversion.

System capability: SystemCapability.Utils.Lang

Name	Type	Mandatory	Description
trim	boolean	Yes	Whether to trim the whitespace characters before and after the text. The default value is false.
ignoreDeclaration	boolean	No	Whether to ignore the XML declaration. The default value is false.
ignoreInstruction	boolean	No	Whether to ignore the XML processing instruction. The default value is false.
ignoreAttributes	boolean	No	Whether to print attributes across multiple lines and indent attributes. The default value is false.
ignoreComment	boolean	No	Whether to ignore element comments. The default value is false.
ignoreCDATA	boolean	No	Whether to ignore the element’s CDATA information. The default value is false.
ignoreDoctype	boolean	No	Whether to ignore the element’s Doctype information. The default value is false.
ignoreText	boolean	No	Whether to ignore the element’s text information. The default value is false.
declarationKey	string	Yes	Name of the attribute key for declaration in the output object. The default value is _declaration.
instructionKey	string	Yes	Name of the attribute key for instruction in the output object. The default value is _instruction.
attributesKey	string	Yes	Name of the attribute key for attributes in the output object. The default value is _attributes.
textKey	string	Yes	Name of the attribute key for text in the output object. The default value is _text.
cdataKey	string	Yes	Name of the attribute key for CDATA in the output object. The default value is _cdata.
doctypeKey	string	Yes	Name of the attribute key for Doctype in the output object. The default value is _doctype.
commentKey	string	Yes	Name of the attribute key for comment in the output object. The default value is _comment.
parentKey	string	Yes	Name of the attribute key for parent in the output object. The default value is _parent.
typeKey	string	Yes	Name of the attribute key for type in the output object. The default value is _type.
nameKey	string	Yes	Name of the attribute key for name in the output object. The default value is _name.
elementsKey	string	Yes	Name of the attribute key for elements in the output object. The default value is _elements.