I would like to set a constant on the field, but with method call, i do not want to create an expression it looks terrible, i would like to simplify this call
@Mapping(target = "channelNotification", expression= "java(new ChannelNotification[]{ " +
"new ChannelNotification(\"email\", 10)})")
to get something like this:
@Mapping(target = "channel", qualifiedByName = "getChannel")
Notification convert(Email emailEntity);
@Named("getChannel")
default Channel[] getChannel() {//with empty params
return new Channel[]{new Channel("email", 10)};
}
Source entity doesn't have field channelNotification, and i don't need to use it. I just want to set a constant like constant = *, but with method call
This is currently not possible. However, what you can do is to use a combination of constant
and qualifiedByName
.
eg
@Mapping(target = "channel", constant = "email" qualifiedByName = "getChannel")
Notification convert(Email emailEntity);
@Named("getChannel")
default Channel[] getChannel(String channelType) {
Channel channel;
if ("email".equals(channelType)) {
channel = new Channel("email", 10);
} else {
throw new IllegalArgumentException("unknown channel type " + channelType);
}
return new Channel[]{channel};
}
What is not known that much is that constant
works in a similar way with qualifiers as other Mapping#source
. Since 1.4 custom mappings between String
(what is in constant
) and the target type will be looked for in order to convert the constant value.
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