us.codecraft.webmagic.model.annotation

注释类型 ComboExtract

@Retention(value=RUNTIME)
 @Target(value={FIELD,TYPE})
public @interface ComboExtract

Combo 'ExtractBy' extractor with and/or operator.

从以下版本开始:

0.2.1

作者:

code4crafter@gmail.com

必需元素概要

所需元素

限定符和类型	必需的元素和说明
ExtractBy[]	value The extractors to be combined.

可选元素概要

可选元素

限定符和类型	可选元素和说明
boolean	multi 已过时。 since 0.4.2
boolean	notNull Define whether the field can be null.
ComboExtract.Op	op Combining operation of extractors.
ComboExtract.Source	source The source for extracting.

元素详细资料

value

public abstract ExtractBy[] value

The extractors to be combined.

返回:

the extractors to be combined

op

public abstract ComboExtract.Op op

Combining operation of extractors.

返回:

combining operation of extractors

默认值:

us.codecraft.webmagic.model.annotation.ComboExtract.Op.And

notNull

public abstract boolean notNull

Define whether the field can be null.
If set to 'true' and the extractor get no result, the entire class will be discarded.

返回:

whether the field can be null

默认值:

false

source

public abstract ComboExtract.Source source

The source for extracting.
It works only if you already added 'ExtractBy' to Class.

返回:

the source for extracting

默认值:

us.codecraft.webmagic.model.annotation.ComboExtract.Source.SelectedHtml

multi

public abstract boolean multi

已过时。 since 0.4.2

Define whether the extractor return more than one result. When set to 'true', the extractor return a list of string (so you should define the field as List).
Deprecated since 0.4.2. This option is determined automatically by the class of field.

返回:

whether the extractor return more than one result

默认值:

false