/*
* Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package javax.xml.xpath;
import java.io.PrintWriter;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.ObjectStreamField;
import java.io.InvalidClassException;
/**
* XPathException
represents a generic XPath exception.
Stream Unique Identifier.
*/ private static final long serialVersionUID = -1837080260374986980L; /** *Constructs a new XPathException
* with the specified detail message
.
The cause
is not initialized.
If message
is null
,
* then a NullPointerException
is thrown.
message
is
* null
.
*/
public XPathException(String message) {
super(message);
if ( message == null ) {
throw new NullPointerException ( "message can't be null");
}
}
/**
* Constructs a new XPathException
* with the specified cause
.
If cause
is null
,
* then a NullPointerException
is thrown.
cause
is null
.
*/
public XPathException(Throwable cause) {
super(cause);
if ( cause == null ) {
throw new NullPointerException ( "cause can't be null");
}
}
/**
* Get the cause of this XPathException.
* * @return Cause of this XPathException. */ public Throwable getCause() { return super.getCause(); } /** * Writes "cause" field to the stream. * The cause is got from the parent class. * * @param out stream used for serialization. * @throws IOException thrown byObjectOutputStream
*
*/
private void writeObject(ObjectOutputStream out)
throws IOException
{
ObjectOutputStream.PutField fields = out.putFields();
fields.put("cause", (Throwable) super.getCause());
out.writeFields();
}
/**
* Reads the "cause" field from the stream.
* And initializes the "cause" if it wasn't
* done before.
*
* @param in stream used for deserialization
* @throws IOException thrown by ObjectInputStream
* @throws ClassNotFoundException thrown by ObjectInputStream
*/
private void readObject(ObjectInputStream in)
throws IOException, ClassNotFoundException
{
ObjectInputStream.GetField fields = in.readFields();
Throwable scause = (Throwable) fields.get("cause", null);
if (super.getCause() == null && scause != null) {
try {
super.initCause(scause);
} catch(IllegalStateException e) {
throw new InvalidClassException("Inconsistent state: two causes");
}
}
}
/**
* Print stack trace to specified PrintStream
.
PrintStream
.
*/
public void printStackTrace(java.io.PrintStream s) {
if (getCause() != null) {
getCause().printStackTrace(s);
s.println("--------------- linked to ------------------");
}
super.printStackTrace(s);
}
/**
* Print stack trace to System.err
.
Print stack trace to specified PrintWriter
.
PrintWriter
.
*/
public void printStackTrace(PrintWriter s) {
if (getCause() != null) {
getCause().printStackTrace(s);
s.println("--------------- linked to ------------------");
}
super.printStackTrace(s);
}
}