Question

我想通过自定义Converter将source中的字段映射到现有对象dest中。您能否建议一种规范的方法来从dest伸出AbstractConverter#convert()对象

请在下面找到代码：

Source source = new Source(xxx);
Dest dest = new Dest(yyy);

modelMapper.addConverter(new AbstractConverter<Source, Dest>() {
  @Override
  protected Dest convert(Source source) {
      // here I need to access 'dest' object in order to manually map fields from 'source'
  });

modelMapper.map(source, dest);

Answer 1

如果要访问目标对象，则不应使用AbstractConverter，而应使用匿名Converter：

modelMapper.addConverter(new Converter<Source, Dest>() {
    public Dest convert(MappingContext<Source, Dest> context) {
         Source s = context.getSource();
         Dest d = context.getDestination();
         d.setYyy(s.getXxx() + d.getYyy()); // example of using dest's existing field
         return d;
     }
});

Answer 2

将Dest dest = new Dest(yyy)移到新的AbstractConvertor主体中。

modelMapper.addConverter(new AbstractConverter<Source, Dest>() {

  private Dest dest = new Dest(yyy);

  @Override
  protected Dest convert(Source source) {
      // here I need to access 'dest' object in order to manually map fields from 'source'
  });

如何在ModelMapper的AbstractConverter.convert（）方法中到达目标对象

2 个答案: