fish.payara.ejb.http.protocol.InvokeMethodResponse Maven / Gradle / Ivy
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package fish.payara.ejb.http.protocol;
import jakarta.json.bind.annotation.JsonbPropertyOrder;
import jakarta.json.bind.annotation.JsonbTypeDeserializer;
import jakarta.json.bind.serializer.DeserializationContext;
import jakarta.json.bind.serializer.JsonbDeserializer;
import jakarta.json.stream.JsonParser;
import java.io.Serializable;
import java.lang.reflect.Type;
/**
* Result of invoking an EJB method.
*
* @author Jan Bernitt
*/
@JsonbPropertyOrder({"type", "result"})
@JsonbTypeDeserializer(InvokeMethodResponse.Deserializer.class)
public class InvokeMethodResponse implements Serializable {
private static final long serialVersionUID = 1L;
/**
* Actual type of the result
*/
public final String type;
public final Object result;
public InvokeMethodResponse(Object result) {
this(result == null ? "" : result.getClass().getName(), result);
}
public InvokeMethodResponse(String type, Object result) {
this.type = type;
this.result = result;
}
// This deserializer is only fit for limited use cases. Client should employ different deserialization means,
// that make use of the expected return type as well (especially to support Optional returns)
public static class Deserializer implements JsonbDeserializer {
@Override
public InvokeMethodResponse deserialize(JsonParser parser, DeserializationContext ctx, Type rtType) {
String type = null;
Object result = null;
while (parser.hasNext()) {
JsonParser.Event event = parser.next();
if (event == JsonParser.Event.KEY_NAME && parser.getString().equals("type")) {
parser.next();
type = parser.getString();
} else if (event == JsonParser.Event.KEY_NAME && parser.getString().equals("result")) {
Class resultClass = determineClass(type);
result = ctx.deserialize(resultClass, parser);
}
}
return new InvokeMethodResponse(result);
}
private static Class determineClass(String type) {
if (type == null) {
throw new IllegalArgumentException("Type was not specified");
}
try {
return Class.forName(type);
} catch (ClassNotFoundException e) {
throw new IllegalArgumentException("Could not find class for type "+type, e);
}
}
}
}