Claude
d2c1efc2c4
09 shows which language level each sealed feature needs; 10 runs the Payment model through Jackson 3 (jars fetched and sha1-checked, not committed). Co-Authored-By: Claude Sonnet 5 <[email protected]> Claude-Session: https://claude.ai/code/session_01TF9JWFvJSNm6HVzswzZU5a
26 lines
1.1 KiB
Java
26 lines
1.1 KiB
Java
import com.fasterxml.jackson.annotation.JsonSubTypes;
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import com.fasterxml.jackson.annotation.JsonTypeInfo;
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import tools.jackson.databind.json.JsonMapper;
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public class JsonForgotten {
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// Wallet is a permitted subtype, and the compiler is happy, but nobody told Jackson about it.
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@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, property = "type")
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@JsonSubTypes({
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@JsonSubTypes.Type(value = Card.class, name = "card"),
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@JsonSubTypes.Type(value = Upi.class, name = "upi")})
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sealed interface Payment permits Card, Upi, Wallet {}
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record Card(long amount) implements Payment {}
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record Upi(long amount) implements Payment {}
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record Wallet(long amount) implements Payment {}
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public static void main(String[] args) {
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JsonMapper mapper = JsonMapper.builder().build();
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System.out.println("write : " + mapper.writeValueAsString(new Wallet(500)));
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try {
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mapper.readValue("{\"type\":\"wallet\",\"amount\":500}", Payment.class);
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} catch (Exception e) {
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System.out.println("read : " + e.getClass().getSimpleName() + ": " + e.getMessage().lines().findFirst().orElse(""));
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}
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}
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}
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