Java 推土机自定义转换器 - 将整个对象作为字段“A”传递
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Dozer custom converter - passing the whole object as field 'A'
提问by lance-java
I'd like to map a CustomConverter in dozer but I'd like to pass the whole current object as the source. All of the examples in the dozer CustomConverter documentation pass a field of the input object as the source and not the whole object.
我想在推土机中映射一个 CustomConverter，但我想将整个当前对象作为源传递。dozer CustomConverter 文档中的所有示例都将输入对象的字段作为源而不是整个对象传递。
I'd like to do something like this:
我想做这样的事情：
<mapping>
<class-a>foo.bar.InputObject</class-a>
<class-b>foo.bar.OutputObject</class-b>
<field custom-converter="foo.bar.MyConverter">
<a>this</a> <!-- how do I access the whole value and not just a field? -->
<b>custom</b>
</field>
<field>
<a>anotherField</a>
<b>anotherField</b>
</field>
</mapping>
And
和
public class MyConverter extends DozerConverter<InputObject, String> {
...
public String convertTo(InputObject input, String custom) {
// do some transformation
}
}
CustomConverter docs here: http://dozer.sourceforge.net/documentation/customconverter.html
CustomConverter 文档在这里：http: //dozer.sourceforge.net/documentation/customconverter.html
回答by Prasann
Try implementing the CustomConverter instead of DozerConverter and try passing it as:
尝试实现 CustomConverter 而不是 DozerConverter 并尝试将其传递为：
<field custom-converter="my.custom.converter">
<a>this</a>
<b>myfield</b>
</field>
回答by fl0w
If you use the field mapping you want to identify the attribute by using "key":
如果您使用字段映射，您希望使用“key”来标识属性：
<field custom-converter="de.xyz.custom.MyConverter">
<a key="variablename">this</a>
<b>targetvariablename</b>
</field>
You can then proceed to implement the converter. You will be given the Object containing the field "variablename" as source. If for example you do not have a setter for a list value (like I had for whatever reason...) you are now able to manipulate the source object the way you need to.
然后，您可以继续实施转换器。您将获得包含字段“变量名”的对象作为源。例如，如果您没有列表值的设置器（就像我出于任何原因那样......），您现在可以按照您需要的方式操作源对象。
