org.apache.xmlbeans.xml.stream.utils.NestedThrowable Maven / Gradle / Ivy
/* Copyright 2004 The Apache Software Foundation
*
* 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.apache.xmlbeans.xml.stream.utils;
/**
* The interface implemented by NestedException, NestedError, and
* NestedRuntimeException largely so Util can provide a standard
* implementation of toString() and printStackTrace()
*
* @deprecated use JDK 1.4 style nested throwables where possible.
*
*/
import java.io.PrintWriter;
import java.io.PrintStream;
import java.lang.reflect.InvocationTargetException;
public interface NestedThrowable {
/** Get the nested Throwable. */
Throwable getNested();
/** Call super.toString(). [Kludge but necessary.] */
String superToString();
/** Call super.printStackTrace(). [Kludge but necessary.] */
void superPrintStackTrace(PrintStream ps);
/** Call super.printStackTrace(). [Kludge but necessary.] */
void superPrintStackTrace(PrintWriter po);
static class Util {
private static String EOL = System.getProperty("line.separator");
/**
* Prints the exception message and its nested exception message.
*
* @return String representation of the exception
*/
public static String toString(NestedThrowable nt) {
Throwable nested = nt.getNested();
if (nested == null) {
return nt.superToString();
} else {
return nt.superToString() + " - with nested exception:" +
EOL + "[" + nestedToString(nested) + "]";
}
}
private static String nestedToString(Throwable nested) {
if (nested instanceof InvocationTargetException) {
InvocationTargetException ite = (InvocationTargetException) nested;
return nested.toString() + " - with target exception:" +
EOL + "[" + ite.getTargetException().toString() +
"]";
}
return nested.toString();
}
/**
* Prints the stack trace associated with this exception and
* its nested exception.
*
* @param s PrintStream
*/
public static void printStackTrace(NestedThrowable nt, PrintStream s) {
Throwable nested = nt.getNested();
if (nested != null) {
nested.printStackTrace(s);
s.println("--------------- nested within: ------------------");
}
nt.superPrintStackTrace(s);
}
/**
* Prints the stack trace associated with this exception and
* its nested exception.
*
* @param w PrintWriter
*/
public static void printStackTrace(NestedThrowable nt, PrintWriter w) {
Throwable nested = nt.getNested();
if (nested != null) {
nested.printStackTrace(w);
w.println("--------------- nested within: ------------------");
}
nt.superPrintStackTrace(w);
}
}
}