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Apache XML Security for Java supports XML-Signature Syntax and Processing, W3C Recommendation 12 February 2002, and XML Encryption Syntax and Processing, W3C Recommendation 10 December 2002. As of version 1.4, the library supports the standard Java API JSR-105: XML Digital Signature APIs.

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/**
 * 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.xml.security.exceptions;

import java.text.MessageFormat;

import org.apache.xml.security.utils.I18n;

/**
 * The mother of all Exceptions in this bundle. It allows exceptions to have
 * their messages translated to the different locales.
 *
 * The xmlsecurity_en.properties file contains this line:
 *  * xml.WrongElement = Can't create a {0} from a {1} element
 * 
 *
 * Usage in the Java source is:
 *  * {
 *    Object exArgs[] = { Constants._TAG_TRANSFORMS, "BadElement" };
 *
 *    throw new XMLSecurityException("xml.WrongElement", exArgs);
 * }
 * 
 *
 * Additionally, if another Exception has been caught, we can supply it, too>
 *  * try {
 *    ...
 * } catch (Exception oldEx) {
 *    Object exArgs[] = { Constants._TAG_TRANSFORMS, "BadElement" };
 *
 *    throw new XMLSecurityException("xml.WrongElement", exArgs, oldEx);
 * }
 * 
 *
 *
 * @author Christian Geuer-Pollmann
 */
public class XMLSecurityException extends Exception {

    /**
     * 
     */
    private static final long serialVersionUID = 1L;

    /** Field msgID */
    protected String msgID;

    /**
     * Constructor XMLSecurityException
     *
     */
    public XMLSecurityException() {
        super("Missing message string");

        this.msgID = null;
    }

    /**
     * Constructor XMLSecurityException
     *
     * @param msgID
     */
    public XMLSecurityException(String msgID) {
        super(I18n.getExceptionMessage(msgID));

        this.msgID = msgID;
    }

    /**
     * Constructor XMLSecurityException
     *
     * @param msgID
     * @param exArgs
     */
    public XMLSecurityException(String msgID, Object exArgs[]) {

        super(MessageFormat.format(I18n.getExceptionMessage(msgID), exArgs));

        this.msgID = msgID;
    }

    /**
     * Constructor XMLSecurityException
     *
     * @param originalException
     */
    public XMLSecurityException(Exception originalException) {

        super(originalException.getMessage(), originalException);
    }

    /**
     * Constructor XMLSecurityException
     *
     * @param msgID
     * @param originalException
     */
    public XMLSecurityException(Exception originalException, String msgID) {
        super(I18n.getExceptionMessage(msgID, originalException), originalException);

        this.msgID = msgID;
    }

    /**
     * Constructor XMLSecurityException
     *
     * @param msgID
     * @param exArgs
     * @param originalException
     */
    public XMLSecurityException(Exception originalException, String msgID, Object exArgs[]) {
        super(MessageFormat.format(I18n.getExceptionMessage(msgID), exArgs), originalException);

        this.msgID = msgID;
    }

    /**
     * Method getMsgID
     *
     * @return the messageId
     */
    public String getMsgID() {
        if (msgID == null) {
            return "Missing message ID";
        } 
        return msgID;      
    }

    /** @inheritDoc */
    public String toString() {
        String s = this.getClass().getName();
        String message = super.getLocalizedMessage();

        if (message != null) {
            message = s + ": " + message;
        } else {
            message = s;
        }

        if (super.getCause() != null) {
            message = message + "\nOriginal Exception was " + super.getCause().toString();
        }

        return message;
    }

    /**
     * Method printStackTrace
     *
     */
    public void printStackTrace() {
        synchronized (System.err) {
            super.printStackTrace(System.err);
        }
    }

    /**
     * Method getOriginalException
     *
     * @return the original exception
     */
    public Exception getOriginalException() {
        if (this.getCause() instanceof Exception) {
            return (Exception)this.getCause();
        }
        return null;
    }
}