// *************************************************************************************************************************** | |
// * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file * | |
// * distributed with this work for additional information regarding copyright ownership. The ASF licenses this file * | |
// * to you 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.apache.juneau.http.exception; | |
import static org.apache.juneau.internal.StringUtils.*; | |
import java.lang.reflect.*; | |
import java.text.*; | |
import java.util.*; | |
import org.apache.juneau.*; | |
import org.apache.juneau.annotation.*; | |
import org.apache.juneau.collections.*; | |
import org.apache.juneau.http.annotation.*; | |
import org.apache.juneau.internal.*; | |
/** | |
* Exception thrown to trigger an error HTTP status. | |
* | |
* <p> | |
* REST methods on subclasses of <c>RestServlet</c> can throw this exception to trigger an HTTP status other than the | |
* automatically-generated <c>404</c>, <c>405</c>, and <c>500</c> statuses. | |
*/ | |
@Response | |
public class HttpException extends BasicRuntimeException { | |
private static final long serialVersionUID = 1L; | |
private int status; | |
private AMap<String,Object> headers = AMap.create(); | |
/** | |
* Constructor. | |
* | |
* @param cause The cause of this exception. | |
* @param status The HTTP status code. | |
* @param msg The status message. | |
* @param args Optional {@link MessageFormat}-style arguments. | |
*/ | |
public HttpException(Throwable cause, int status, String msg, Object...args) { | |
super(cause, message(cause, msg, args)); | |
this.status = status; | |
} | |
/** | |
* Constructor. | |
* | |
* @param msg The status message. | |
*/ | |
public HttpException(String msg) { | |
this((Throwable)null, 0, msg); | |
} | |
/** | |
* Constructor. | |
* @param cause The root exception. | |
* @param status The HTTP status code. | |
*/ | |
public HttpException(Throwable cause, int status) { | |
this(cause, status, null); | |
} | |
/** | |
* Constructor. | |
* | |
* @param status The HTTP status code. | |
* @param msg The status message. | |
* @param args Optional {@link MessageFormat}-style arguments. | |
*/ | |
public HttpException(int status, String msg, Object...args) { | |
this(null, status, msg, args); | |
} | |
/** | |
* Returns the root cause of this exception. | |
* | |
* <p> | |
* The root cause is the first exception in the init-cause parent chain that's not one of the following: | |
* <ul> | |
* <li>{@link HttpException} | |
* <li>{@link InvocationTargetException} | |
* </ul> | |
* | |
* @return The root cause of this exception, or <jk>null</jk> if no root cause was found. | |
*/ | |
public Throwable getRootCause() { | |
Throwable t = this; | |
while(t != null) { | |
if (! (t instanceof HttpException || t instanceof InvocationTargetException)) | |
return t; | |
t = t.getCause(); | |
} | |
return null; | |
} | |
/** | |
* Returns all error messages from all errors in this stack. | |
* | |
* <p> | |
* Typically useful if you want to render all the error messages in the stack, but don't want to render all the | |
* stack traces too. | |
* | |
* @param scrubForXssVulnerabilities | |
* If <jk>true</jk>, replaces <js>'<'</js>, <js>'>'</js>, and <js>'&'</js> characters with spaces. | |
* @return All error messages from all errors in this stack. | |
*/ | |
public String getFullStackMessage(boolean scrubForXssVulnerabilities) { | |
String msg = getMessage(); | |
StringBuilder sb = new StringBuilder(); | |
if (msg != null) { | |
if (scrubForXssVulnerabilities) | |
msg = msg.replace('<', ' ').replace('>', ' ').replace('&', ' '); | |
sb.append(msg); | |
} | |
Throwable e = getCause(); | |
while (e != null) { | |
msg = e.getMessage(); | |
if (msg != null && scrubForXssVulnerabilities) | |
msg = msg.replace('<', ' ').replace('>', ' ').replace('&', ' '); | |
String cls = e.getClass().getSimpleName(); | |
if (msg == null) | |
sb.append(format("\nCaused by ({0})", cls)); | |
else | |
sb.append(format("\nCaused by ({0}): {1}", cls, msg)); | |
e = e.getCause(); | |
} | |
return sb.toString(); | |
} | |
@Override /* Object */ | |
public int hashCode() { | |
int i = 0; | |
Throwable t = this; | |
while (t != null) { | |
for (StackTraceElement e : t.getStackTrace()) | |
i ^= e.hashCode(); | |
t = t.getCause(); | |
} | |
return i; | |
} | |
/** | |
* Set the status code on this exception. | |
* | |
* @param status The status code. | |
* @return This object (for method chaining). | |
*/ | |
public HttpException setStatus(int status) { | |
this.status = status; | |
return this; | |
} | |
/** | |
* Returns the HTTP status code. | |
* | |
* @return The HTTP status code. | |
*/ | |
@ResponseStatus | |
public int getStatus() { | |
return status; | |
} | |
/** | |
* Add an HTTP header to this exception. | |
* | |
* @param name The header name. | |
* @param val The header value. | |
* @return This object (for method chaining). | |
*/ | |
@FluentSetter | |
public HttpException header(String name, Object val) { | |
headers.a(name, val); | |
return this; | |
} | |
/** | |
* Returns the headers associated with this exception. | |
* | |
* @return The headers associated with this exception. | |
*/ | |
@ResponseHeader("*") | |
@BeanIgnore | |
public Map<String,Object> getHeaders() { | |
return headers; | |
} | |
private static String message(Throwable cause, String msg, Object...args) { | |
if (msg == null && cause != null) | |
return firstNonEmpty(cause.getLocalizedMessage(), cause.getClass().getName()); | |
return format(msg, args); | |
} | |
// When serialized, just serialize the message itself. | |
@Override /* Object */ | |
public String toString() { | |
return emptyIfNull(getLocalizedMessage()); | |
} | |
// <FluentSetters> | |
// </FluentSetters> | |
} |