ComboExtract (webmagic 0.10.3 API)

```
@Retention(RUNTIME)
@Target({FIELD,TYPE})
public @interface ComboExtract
```
Combo 'ExtractBy' extractor with and/or operator.

Since:

0.2.1

Author:

code4crafter@gmail.com

Required Element Summary

Required Elements
Modifier and Type Required Element Description

ExtractBy[] value
The extractors to be combined.

Optional Element Summary

Optional Elements
Modifier and Type	Optional Element	Description
`boolean`	`multi`	Deprecated. since 0.4.2
`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.
`ComboExtract.Op`	`op`	Combining operation of extractors.
`ComboExtract.Source`	`source`	The source for extracting.

- Element Detail
  - value
```
ExtractBy[] value
```
    The extractors to be combined.
    
    Returns:
    
    the extractors to be combined
- - op
```
ComboExtract.Op op
```
    Combining operation of extractors.
    
    Returns:
    
    combining operation of extractors
    
    Default:
    
    us.codecraft.webmagic.model.annotation.ComboExtract.Op.And
- - notNull
```
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.
    
    Returns:
    
    whether the field can be null
    
    Default:
    
    false
- - source
```
ComboExtract.Source source
```
    The source for extracting.
    It works only if you already added 'ExtractBy' to Class.
    
    Returns:
    
    the source for extracting
    
    Default:
    
    us.codecraft.webmagic.model.annotation.ComboExtract.Source.SelectedHtml
- - multi
```
boolean multi
```
    Deprecated.
    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.
    
    Returns:
    
    whether the extractor return more than one result
    
    Default:
    
    false