/*
* Copyright 2015 Kevin Herron
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.digitalpetri.opcua.stack.core;
import java.util.Optional;
import com.digitalpetri.opcua.stack.core.types.builtin.StatusCode;
public class UaException extends Exception {
private final StatusCode statusCode;
public UaException(long statusCode) {
this.statusCode = new StatusCode(statusCode);
}
public UaException(StatusCode statusCode) {
this.statusCode = statusCode;
}
public UaException(Throwable cause) {
super(cause);
this.statusCode = new StatusCode(StatusCodes.Bad_InternalError);
}
public UaException(long statusCode, Throwable cause) {
super(cause);
this.statusCode = new StatusCode(statusCode);
}
public UaException(long statusCode, String message) {
super(message);
this.statusCode = new StatusCode(statusCode);
}
public UaException(StatusCode statusCode, String message) {
super(message);
this.statusCode = statusCode;
}
public StatusCode getStatusCode() {
return statusCode;
}
@Override
public String getMessage() {
String message = super.getMessage();
if (message == null || message.isEmpty()) {
Optional<String[]> lookup = StatusCodes.lookup(statusCode.getValue());
String status = lookup.map(nd -> nd[0]).orElse(statusCode.toString());
String description = lookup.map(nd -> nd[1]).orElse("");
if (description.isEmpty()) {
message = String.format("status=%s", status);
} else {
message = String.format("status=%s, description=%s", status, description);
}
}
return message;
}
@Override
public String toString() {
String clazzName = getClass().getSimpleName();
Optional<String[]> lookup = StatusCodes.lookup(statusCode.getValue());
String status = lookup.map(nd -> nd[0]).orElse(statusCode.toString());
String message = super.getMessage();
if (message == null) {
message = lookup.map(nd -> nd[1]).orElse("");
}
if (message.isEmpty()) {
return String.format("%s: status=%s", clazzName, status);
} else {
return String.format("%s: status=%s, message=%s", clazzName, status, message);
}
}
/**
* If {@code ex} is a {@link UaException}, or if a {@link UaException} can be found by walking up the exception
* cause chain, return it.
*
* @param ex the {@link Throwable} to extract from.
* @return a {@link UaException} if one was present in the exception chain.
*/
public static Optional<UaException> extract(Throwable ex) {
if (ex instanceof UaException) {
return Optional.of((UaException) ex);
} else {
Throwable cause = ex.getCause();
return cause != null ?
extract(cause) : Optional.empty();
}
}
}