/* * $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//httpclient/src/java/org/apache/commons/httpclient/HttpException.java,v 1.19 2004/09/30 18:53:20 olegk Exp $ * $Revision: 480424 $ * $Date: 2006-11-29 06:56:49 +0100 (Wed, 29 Nov 2006) $ * * ==================================================================== * *  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. * ==================================================================== * * This software consists of voluntary contributions made by many * individuals on behalf of the Apache Software Foundation.  For more * information on the Apache Software Foundation, please see * <http://www.apache.org/>. * */package org.apache.commons.httpclient;import java.io.IOException;import java.io.PrintStream;import java.io.PrintWriter;import java.lang.reflect.Method;/** * Signals that an HTTP or HttpClient exception has occurred. *  * @author Laura Werner *  * @version $Revision: 480424 $ $Date: 2006-11-29 06:56:49 +0100 (Wed, 29 Nov 2006) $ */public class HttpException extends IOException {    /**     * Creates a new HttpException with a <tt>null</tt> detail message.     */    public HttpException() {        super();        this.cause = null;    }    /**     * Creates a new HttpException with the specified detail message.     *     * @param message the exception detail message     */    public HttpException(String message) {        super(message);        this.cause = null;    }    /**     * Creates a new HttpException with the specified detail message and cause.     *      * @param message the exception detail message     * @param cause the <tt>Throwable</tt> that caused this exception, or <tt>null</tt>     * if the cause is unavailable, unknown, or not a <tt>Throwable</tt>     *      * @since 3.0     */    public HttpException(String message, Throwable cause) {        super(message);        this.cause = cause;                // If we're running on JDK 1.4 or later, tell Throwable what the cause was        try {            Class[] paramsClasses = new Class[] { Throwable.class };            Method initCause = Throwable.class.getMethod("initCause", paramsClasses);            initCause.invoke(this, new Object[] { cause });        } catch (Exception e) {            // The setCause method must not be available        }    }    /**     * Return the <tt>Throwable</tt> that caused this exception, or <tt>null</tt>     *         if the cause is unavailable, unknown, or not a <tt>Throwable</tt>.     *      * @return the <tt>Throwable</tt> that caused this exception, or <tt>null</tt>     *         if the cause is unavailable, unknown, or not a <tt>Throwable</tt>     *      * @since 3.0     */    public Throwable getCause() {        return cause;    }    /**     * Print this HttpException and its stack trace to the standard error stream.     *      * @since 3.0     */    public void printStackTrace() {        printStackTrace(System.err);    }    /**     * Print this HttpException and its stack trace to the specified print stream.     *      * @param s the <tt>PrintStream</tt> to which the exception and its stack trace     * should be written     *      * @since 3.0     */    public void printStackTrace(PrintStream s) {        try {            // JDK 1.4 has a nice printStackTrace method that prints the cause's stack            // trace too and prunes out duplicate stack frames.  Call it if possible,            // which is determined by checking whether JDK 1.4's getStackTrace method is present             Class[] paramsClasses = new Class[] {  };            this.getClass().getMethod("getStackTrace", paramsClasses);            super.printStackTrace(s);        } catch (Exception ex) {            // If that didn't work, print it out ourselves            // First print this exception's stack trace.            super.printStackTrace(s);            if (cause != null) {                // Print out the exception that caused this one.                // This will recurse if the cause is another HttpException.                s.print("Caused by: ");                cause.printStackTrace(s);            }        }    }    /**     * Print this HttpException and its stack trace to the specified print writer.     *      * @param s the <tt>PrintWriter</tt> to which the exception and its stack trace     * should be written     *      * @since 3.0     */    public void printStackTrace(PrintWriter s) {        try {            // JDK 1.4 has a nice printStackTrace method that prints the cause's stack            // trace too and prunes out duplicate stack frames.  Call it if possible,            // which is determined by checking whether JDK 1.4's getStackTrace method is present             Class[] paramsClasses = new Class[] {  };            this.getClass().getMethod("getStackTrace", paramsClasses);            super.printStackTrace(s);        } catch (Exception ex) {            // If that didn't work, print it out ourselves            // First print this exception's stack trace.            super.printStackTrace(s);            if (cause != null) {                // Print out the exception that caused this one.                // This will recurse if the cause is another HttpException.                s.print("Caused by: ");                cause.printStackTrace(s);            }        }    }    /**     * Sets the text description of the reason for an exception.     *     * @param reason The reason for the exception.     *     * @deprecated HttpClient no longer uses this for itself.  It is only     * provided for compatibility with existing clients, and will be removed     * in a future release.     */    public void setReason(String reason) {        this.reason = reason;    }    /**     * Get the text description of the reason for an exception.     *     * @deprecated HttpClient no longer uses this for itself.  It is only     * provided for compatibility with existing clients, and will be removed     * in a future release.     */    public String getReason() {        return reason;    }    /**     * Sets the status code description of the reason for an exception.     *     * @param code The reason for the exception.  This is intended to be an     *  HTTP status code.     *     * @deprecated HttpClient no longer uses this for itself.  It is only     * provided for compatibility with existing clients, and will be removed     * in a future release.     */    public void setReasonCode(int code) {        reasonCode = code;    }    /**     * Get the status code description of the reason for an exception.     *     * @deprecated HttpClient no longer uses this for itself.  It is only     * provided for compatibility with existing clients, and will be removed     * in a future release.     */    public int getReasonCode() {        return this.reasonCode;    }    /**     * A "reason" string provided for compatibility with older clients.     *     * @deprecated HttpClient no longer uses this field for itself.  It     * is only provided for compatibility with existing clients.     */    private String reason;    /**     * Reason code for compatibility with older clients.     *     * @deprecated  HttpClient no longer uses this field for itself.     *  It is only provided for compatibility with existing clients.     */    private int reasonCode = HttpStatus.SC_OK;    /** The original Throwable representing the cause of this error */    private final Throwable cause;}