/*
 * @(#)SQLWarning.java	1.30 06/08/06
 *
 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package java.sql;

/**
 * <P>An exception that provides information on  database access
 * warnings. Warnings are silently chained to the object whose method
 * caused it to be reported.  
 * <P>
 * Warnings may be retrieved from <code>Connection</code>, <code>Statement</code>,
 * and <code>ResultSet</code> objects.  Trying to retrieve a warning on a
 * connection after it has been closed will cause an exception to be thrown.
 * Similarly, trying to retrieve a warning on a statement after it has been
 * closed or on a result set after it has been closed will cause 
 * an exception to be thrown. Note that closing a statement also 
 * closes a result set that it might have produced.
 *
 * @see Connection#getWarnings
 * @see Statement#getWarnings
 * @see ResultSet#getWarnings 
 */
public class SQLWarning extends SQLException {

    /**
     * Constructs a  <code>SQLWarning</code> object
     *  with a given <code>reason</code>, <code>SQLState</code>  and 
     * <code>vendorCode</code>.
     *
     * The <code>cause</code> is not initialized, and may subsequently be
     * initialized by a call to the 
     * {@link Throwable#initCause(java.lang.Throwable)} method.
     * <p>
     * @param reason a description of the warning 
     * @param SQLState an XOPEN or SQL:2003 code identifying the warning
     * @param vendorCode a database vendor-specific warning code
     */
     public SQLWarning(String reason, String SQLState, int vendorCode) {
	super(reason, SQLState, vendorCode);
	DriverManager.println("SQLWarning: reason(" + reason + 
			      ") SQLState(" + SQLState + 
			      ") vendor code(" + vendorCode + ")");
    }


    /**
     * Constructs a <code>SQLWarning</code> object
     * with a given <code>reason</code> and <code>SQLState</code>.
     *
     * The <code>cause</code> is not initialized, and may subsequently be
     * initialized by a call to the 
     * {@link Throwable#initCause(java.lang.Throwable)} method. The vendor code
     * is initialized to 0.
     * <p>
     * @param reason a description of the warning 
     * @param SQLState an XOPEN or SQL:2003 code identifying the warning
     */
    public SQLWarning(String reason, String SQLState) {
	super(reason, SQLState);
	DriverManager.println("SQLWarning: reason(" + reason + 
				  ") SQLState(" + SQLState + ")");
    }

    /**
     * Constructs a <code>SQLWarning</code> object
     * with a given <code>reason</code>. The <code>SQLState</code> 
     * is initialized to <code>null</code> and the vender code is initialized 
     * to 0.
     *
     * The <code>cause</code> is not initialized, and may subsequently be
     * initialized by a call to the 
     * {@link Throwable#initCause(java.lang.Throwable)} method.
     * <p>
     * @param reason a description of the warning 
     */
    public SQLWarning(String reason) {
	super(reason);
	DriverManager.println("SQLWarning: reason(" + reason + ")");
    }

    /**
     * Constructs a  <code>SQLWarning</code> object.
     * The <code>reason</code>, <code>SQLState</code> are initialized
     * to <code>null</code> and the vendor code is initialized to 0.
     *
     * The <code>cause</code> is not initialized, and may subsequently be
     * initialized by a call to the 
     * {@link Throwable#initCause(java.lang.Throwable)} method.
     * <p>
     */
    public SQLWarning() {
	super();
	DriverManager.println("SQLWarning: ");
    }

    /**
     * Constructs a <code>SQLWarning</code> object
     * with a given  <code>cause</code>.
     * The <code>SQLState</code> is initialized
     * to <code>null</code> and the vendor code is initialized to 0. 
     * The <code>reason</code>  is initialized to <code>null</code> if 
     * <code>cause==null</code> or to <code>cause.toString()</code> if 
     * <code>cause!=null</code>.
     * <p>
     * @param cause the underlying reason for this <code>SQLWarning</code> (which is saved for later retrieval by the <code>getCause()</code> method); may be null indicating
     *     the cause is non-existent or unknown.
     */
    public SQLWarning(Throwable cause) {
        super(cause);
        DriverManager.println("SQLWarning");
    }

    /**
     * Constructs a <code>SQLWarning</code> object
     * with a given
     * <code>reason</code> and  <code>cause</code>.  
     * The <code>SQLState</code> is  initialized to <code>null</code>
     * and the vendor code is initialized to 0.
     * <p>
     * @param reason a description of the warning
     * @param cause  the underlying reason for this <code>SQLWarning</code> 
     * (which is saved for later retrieval by the <code>getCause()</code> method);
     * may be null indicating the cause is non-existent or unknown.
     */
    public SQLWarning(String reason, Throwable cause) {
        super(reason,cause);
        DriverManager.println("SQLWarning : reason("+ reason + ")");
    }

    /**
     * Constructs a <code>SQLWarning</code> object
     * with a given
     * <code>reason</code>, <code>SQLState</code> and  <code>cause</code>.  
     * The vendor code is initialized to 0.
     * <p>
     * @param reason a description of the warning
     * @param SQLState an XOPEN or SQL:2003 code identifying the warning
     * @param cause the underlying reason for this <code>SQLWarning</code> (which is saved for later retrieval by the <code>getCause()</code> method); may be null indicating
     *     the cause is non-existent or unknown.
     */
    public SQLWarning(String reason, String SQLState, Throwable cause) {
        super(reason,SQLState,cause);
        DriverManager.println("SQLWarning: reason(" + reason +
				  ") SQLState(" + SQLState + ")");
    }

    /**
     * Constructs a<code>SQLWarning</code> object
     * with a given
     * <code>reason</code>, <code>SQLState</code>, <code>vendorCode</code>
     * and  <code>cause</code>.  
     * <p>
     * @param reason a description of the warning
     * @param SQLState an XOPEN or SQL:2003 code identifying the warning
     * @param vendorCode a database vendor-specific warning code
     * @param cause the underlying reason for this <code>SQLWarning</code> (which is saved for later retrieval by the <code>getCause()</code> method); may be null indicating
     *     the cause is non-existent or unknown.
     */
    public SQLWarning(String reason, String SQLState, int vendorCode, Throwable cause) {
        super(reason,SQLState,vendorCode,cause);
        DriverManager.println("SQLWarning: reason(" + reason +
			      ") SQLState(" + SQLState +
			      ") vendor code(" + vendorCode + ")");

    }
    /**
     * Retrieves the warning chained to this <code>SQLWarning</code> object by
     * <code>setNextWarning</code>.
     *
     * @return the next <code>SQLException</code> in the chain; <code>null</code> if none
     * @see #setNextWarning
     */
    public SQLWarning getNextWarning() {
	try {
	    return ((SQLWarning)getNextException());
	} catch (ClassCastException ex) {
	    // The chained value isn't a SQLWarning.
	    // This is a programming error by whoever added it to
	    // the SQLWarning chain.  We throw a Java "Error".
	    throw new Error("SQLWarning chain holds value that is not a SQLWarning");
	}
    }

    /**
     * Adds a <code>SQLWarning</code> object to the end of the chain.
     *
     * @param w the new end of the <code>SQLException</code> chain
     * @see #getNextWarning
     */
    public void setNextWarning(SQLWarning w) {
	setNextException(w);
    }

    private static final long serialVersionUID = 3917336774604784856L;
}