Extractor class abstract

Subclasses of this class implement different kinds of extractors. The most common kinds of extractors are:

• HtmlExtractor. An extractor to select a html element, document or event a html string and then extract desire data by using CSS-Selector syntax.

• HtmlIncludeExtractor. An extractor to select element from a html element, document or event a html string by using CSS-Selector syntax.

• HtmlExcludeExtractor. An extractor to exclude element from a html element, document or event a html string by using CSS-Selector syntax.

• HtmlAttributeEditor. An extractor to change HTML's tag attributes of a html element, document or event a html string by using CSS-Selector syntax.

• HtmlRenameExtractor. An extractor to rename HTML's tag

• HtmlDecoderExtractor. Decode HTML special characters.

• NotNullExtractor. An extractor to check if an element is NULL.

• RegexExtractor. An extractor to extract data using Regular Expression.

• RegexReplaceExtractor. An extractor to replace a string using Regular Expression.

• StringTrimExtractor. An extractor to trim a string.

• StringRemoveEmptyExtractor. An extractor to remove all NULL and empty string.

• StringSplitterExtractor. An extractor to split a string into a list.

• StringFilterExtractor. An extractor to filter out unnecessary items.

• SwitchCaseExtractor. An extractor to transform a value to others using switch-case expression.

• DateTimeExtractor. An extractor to extract a date time string to DateTime.

• EpochTimeExtractor. An extractor to convert date time to Unix epoch milliseconds.

Implementers

• ArrayGetExtractor
• ArrayRemoveFirstExtractor
• DateTimeExtractor
• EpochTimeExtractor
• HtmlAttributeEditor
• HtmlContainsExtractor
• HtmlDecoderExtractor
• HtmlExcludeExtractor
• HtmlExtractor
• HtmlIncludeExtractor
• HtmlRenameExtractor
• HtmlSetAttributeEditor
• HtmlTextExtractor
• NotNullExtractor
• RegexExtractor
• RegexMatchExtractor
• RegexReplaceExtractor
• StringFilterExtractor
• StringRemoveEmptyExtractor
• StringSplitterExtractor
• StringTrimExtractor
• SwitchCaseExtractor

Constructors

Extractor(String type)

Extractor.fromJson(Map<String, dynamic> json)

factory

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

type → String

final

Methods

extract(dynamic input) → List

Process input and extract necessary data.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toJson() → Map<String, dynamic>

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited