org.jadira.cdt.exception.WrappedRuntimeException Maven / Gradle / Ivy
/*
* Copyright 2012 Christopher Pheby
*
* 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 org.jadira.cdt.exception;
/**
* Class for constructing runtime Exceptions with a given root cause.
*/
public abstract class WrappedRuntimeException extends RuntimeException {
private static final long serialVersionUID = 2370572498972367128L;
/**
* Construct a WrappedRuntimeException with the specified
* message.
* @param message the specific message
*/
public WrappedRuntimeException(String message) {
super(message);
}
/**
* Construct a WrappedRuntimeException with the specified
* message and wrapped exception.
* @param message the specific message
* @param cause the wrapped exception
*/
public WrappedRuntimeException(String message, Throwable cause) {
super(message, cause);
}
/**
* Return the detail message, including the message from the wrapped
* exception if there is one.
* @return The message
*/
@Override
public String getMessage() {
return constructMessage(super.getMessage(), getCause());
}
/**
* Constructs an exception String with the given message and incorporating the
* causing exception
* @param message The message
* @param cause The causing exception
* @return The exception String
*/
protected String constructMessage(String message, Throwable cause) {
if (cause != null) {
StringBuilder strBuilder = new StringBuilder();
if (message != null) {
strBuilder.append(message).append(": ");
}
strBuilder.append("Wrapped exception is {").append(cause);
strBuilder.append("}");
return strBuilder.toString();
} else {
return message;
}
}
/**
* Retrieves the ultimate root cause for this exception, or null
* @return The root cause
*/
public Throwable getRootCause() {
Throwable rootCause = null;
Throwable nextCause = getCause();
while (nextCause != null && !nextCause.equals(rootCause)) {
rootCause = nextCause;
nextCause = nextCause.getCause();
}
return rootCause;
}
/**
* Returns the next parent exception of the given type, or null
* @param exceptionType the exception type to match
* @param The exception type
* @return The matched exception of the target type, or null
*/
public E findWrapped(Class exceptionType) {
if (exceptionType == null) {
return null;
}
Throwable cause = getCause();
while (true) {
if (cause == null) {
return null;
}
if (exceptionType.isInstance(cause)) {
@SuppressWarnings("unchecked") E matchedCause = (E) cause;
return matchedCause;
}
if (cause.getCause() == cause) {
return null;
}
if (cause instanceof WrappedRuntimeException) {
return ((WrappedRuntimeException) cause).findWrapped(exceptionType);
}
if (cause instanceof WrappedCheckedException) {
return ((WrappedCheckedException) cause).findWrapped(exceptionType);
}
cause = cause.getCause();
}
}
}