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package javax.xml.bind;

import java.io.PrintWriter;

/**
 * This is the root exception class for all JAXB exceptions.
 *
 * @author <ul><li>Ryan Shoemaker, Sun Microsystems, Inc.</li></ul>
 * @see JAXBContext
 * @see Marshaller
 * @see Unmarshaller
 * @since 1.6, JAXB 1.0
 */
public class JAXBException extends Exception {
  
    /** 
     * Vendor specific error code
     *
     */
    private String errorCode;

    /** 
     * Exception reference
     *
     */
    private volatile Throwable linkedException;

    static final long serialVersionUID = -5621384651494307979L;

    /** 
     * Construct a JAXBException with the specified detail message.  The 
     * errorCode and linkedException will default to null.
     *
     * @param message a description of the exception
     */
    public JAXBException(String message) {
        this( message, null, null );
    }

    /** 
     * Construct a JAXBException with the specified detail message and vendor 
     * specific errorCode.  The linkedException will default to null.
     *
     * @param message a description of the exception
     * @param errorCode a string specifying the vendor specific error code
     */
    public JAXBException(String message, String errorCode) {
        this( message, errorCode, null );
    }

    /** 
     * Construct a JAXBException with a linkedException.  The detail message and
     * vendor specific errorCode will default to null.
     *
     * @param exception the linked exception
     */
    public JAXBException(Throwable exception) {
        this( null, null, exception );
    }
    
    /** 
     * Construct a JAXBException with the specified detail message and 
     * linkedException.  The errorCode will default to null.
     *
     * @param message a description of the exception
     * @param exception the linked exception
     */
    public JAXBException(String message, Throwable exception) {
        this( message, null, exception );
    }
    
    /** 
     * Construct a JAXBException with the specified detail message, vendor 
     * specific errorCode, and linkedException.
     *
     * @param message a description of the exception
     * @param errorCode a string specifying the vendor specific error code
     * @param exception the linked exception
     */
    public JAXBException(String message, String errorCode, Throwable exception) {
        super( message );
        this.errorCode = errorCode;
        this.linkedException = exception;
    }
    
    /** 
     * Get the vendor specific error code
     *
     * @return a string specifying the vendor specific error code
     */
    public String getErrorCode() {
        return this.errorCode;
    }

    /**
     * Get the linked exception 
     *
     * @return the linked Exception, null if none exists
     */
    public Throwable getLinkedException() {
        return linkedException;
    }

    /**
     * Add a linked Exception.
     *
     * @param exception the linked Exception (A null value is permitted and 
     *                  indicates that the linked exception does not exist or
     *                  is unknown).
     */
    public void setLinkedException( Throwable exception ) {
        this.linkedException = exception;
    }
    
    /**
     * Returns a short description of this JAXBException.
     *
     */
    public String toString() {
        return linkedException == null ? 
            super.toString() :
            super.toString() + "\n - with linked exception:\n[" +
                                linkedException.toString()+ "]";
    }

    /**
     * Prints this JAXBException and its stack trace (including the stack trace
     * of the linkedException if it is non-null) to the PrintStream.
     *
     * @param s PrintStream to use for output
     */
    public void printStackTrace( java.io.PrintStream s ) {
        super.printStackTrace(s);
    }

    /**
     * Prints this JAXBException and its stack trace (including the stack trace
     * of the linkedException if it is non-null) to {@code System.err}.
     *
     */
    public void printStackTrace() {
        super.printStackTrace();
    }

    /**
     * Prints this JAXBException and its stack trace (including the stack trace
     * of the linkedException if it is non-null) to the PrintWriter.
     *
     * @param s PrintWriter to use for output
     */
    public void printStackTrace(PrintWriter s) {
        super.printStackTrace(s);
    }

    @Override
    public Throwable getCause() {
        return linkedException;
    }
}
