package org.acme;

import com.fasterxml.jackson.annotation.JsonFormat;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.annotation.JsonPropertyOrder;

import java.util.Objects;

@JsonFormat(shape = JsonFormat.Shape.ARRAY)
@JsonPropertyOrder({"from", "to", "message"})
public class GreetingItem {
    final String from;
    final String to;
    final String message;

    public GreetingItem(@JsonProperty("from") String from,
                        @JsonProperty("to") String to,
                        @JsonProperty("message") String message) {
        this.from = from;
        this.to = to;
        this.message = message;
    }

    public String getFrom() {
        return from;
    }

    public String getTo() {
        return to;
    }

    public String getMessage() {
        return message;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        GreetingItem that = (GreetingItem) o;
        return Objects.equals(from, that.from) && Objects.equals(to, that.to) && Objects.equals(message, that.message);
    }

    @Override
    public int hashCode() {
        return Objects.hash(from, to, message);
    }

    @Override
    public String toString() {
        return "GreetingItem{" +
                "from='" + from + '\'' +
                ", to='" + to + '\'' +
                ", message='" + message + '\'' +
                '}';
    }
}

package org.acme;

import com.fasterxml.jackson.annotation.JsonFormat;
import jakarta.ws.rs.GET;
import jakarta.ws.rs.Path;
import jakarta.ws.rs.Produces;
import jakarta.ws.rs.core.MediaType;

@Path("/hello")
public class GreetingResource {

    @GET
    @Produces(MediaType.APPLICATION_JSON)
    public GreetingItem hello() {
        return new GreetingItem("RESTEasy Reactive",
                "You",
                "Hello!");
    }
}