org.springframework.core.NestedIOException Maven / Gradle / Ivy
/*
* Copyright 2002-2006 the original author or authors.
*
* 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.springframework.core;
import java.io.IOException;
import java.io.PrintStream;
import java.io.PrintWriter;
/**
* Subclass of IOException that properly handles a root cause,
* exposing the root cause just like NestedChecked/RuntimeException does.
*
* The similarity between this class and the NestedChecked/RuntimeException
* class is unavoidable, as this class needs to derive from IOException
* and cannot derive from NestedCheckedException.
*
* @author Juergen Hoeller
* @since 2.0
* @see #getMessage
* @see #printStackTrace
* @see org.springframework.core.NestedCheckedException
* @see org.springframework.core.NestedRuntimeException
*/
public class NestedIOException extends IOException {
/** Root cause of this nested exception */
private Throwable cause;
/**
* Construct a NestedServletException with the specified detail message.
* @param msg the detail message
*/
public NestedIOException(String msg) {
super(msg);
}
/**
* Construct a NestedServletException with the specified detail message
* and nested exception.
* @param msg the detail message
* @param cause the nested exception
*/
public NestedIOException(String msg, Throwable cause) {
super(msg);
this.cause = cause;
}
/**
* Return the nested cause, or null if none.
*/
public Throwable getCause() {
// Even if you cannot set the cause of this exception other than through
// the constructor, we check for the cause being "this" here, as the cause
// could still be set to "this" via reflection: for example, by a remoting
// deserializer like Hessian's.
return (this.cause == this ? null : this.cause);
}
/**
* Return the detail message, including the message from the nested exception
* if there is one.
*/
public String getMessage() {
return NestedExceptionUtils.buildMessage(super.getMessage(), getCause());
}
/**
* Print the composite message and the embedded stack trace to the specified stream.
* @param ps the print stream
*/
public void printStackTrace(PrintStream ps) {
if (getCause() == null) {
super.printStackTrace(ps);
}
else {
ps.println(this);
ps.print("Caused by: ");
getCause().printStackTrace(ps);
}
}
/**
* Print the composite message and the embedded stack trace to the specified print writer.
* @param pw the print writer
*/
public void printStackTrace(PrintWriter pw) {
if (getCause() == null) {
super.printStackTrace(pw);
}
else {
pw.println(this);
pw.print("Caused by: ");
getCause().printStackTrace(pw);
}
}
}