/*

 * Copyright (c) 2005, 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.script;

/**

 * The generic <code>Exception</code> class for the Scripting APIs.  Checked

 * exception types thrown by underlying scripting implementations must be wrapped in instances of

 * <code>ScriptException</code>.  The class has members to store line and column numbers and

 * filenames if this information is available.

 *

 * @author Mike Grogan

 * @since 1.6

 */

public class ScriptException extends Exception {

    private String fileName;

    private int lineNumber;

    private int columnNumber;

    /**

     * Creates a <code>ScriptException</code> with a String to be used in its message.

     * Filename, and line and column numbers are unspecified.

     *

     * @param s The String to use in the message.

     */

    public ScriptException(String s) {

        super(s);

        fileName = null;

        lineNumber = -1;

        columnNumber = -1;

    }

    /**

     * Creates a <code>ScriptException</code> wrapping an <code>Exception</code> thrown by an underlying

     * interpreter.  Line and column numbers and filename are unspecified.

     *

     * @param e The wrapped <code>Exception</code>.

     */

    public ScriptException(Exception e) {

        super(e);

        fileName = null;

        lineNumber = -1;

        columnNumber = -1;

    }

    /**

     * Creates a <code>ScriptException</code> with message, filename and linenumber to

     * be used in error messages.

     *

     * @param message The string to use in the message

     *

     * @param fileName The file or resource name describing the location of a script error

     * causing the <code>ScriptException</code> to be thrown.

     *

     * @param lineNumber A line number describing the location of a script error causing

     * the <code>ScriptException</code> to be thrown.

     */

    public ScriptException(String message, String fileName, int lineNumber) {

        super(message);

        this.fileName = fileName;

        this.lineNumber = lineNumber;

        this.columnNumber = -1;

    }

    /**

     * <code>ScriptException</code> constructor specifying message, filename, line number

     * and column number.

     * @param message The message.

     * @param fileName The filename

     * @param lineNumber the line number.

     * @param columnNumber the column number.

     */

    public ScriptException(String message,

            String fileName,

            int lineNumber,

            int columnNumber) {

        super(message);

        this.fileName = fileName;

        this.lineNumber = lineNumber;

        this.columnNumber = columnNumber;

    }

    /**

     * Returns a message containing the String passed to a constructor as well as

     * line and column numbers and filename if any of these are known.

     * @return The error message.

     */

    public String getMessage() {

        String ret = super.getMessage();

        if (fileName != null) {

            ret += (" in " + fileName);

            if (lineNumber != -1) {

                ret += " at line number " + lineNumber;

            }

            if (columnNumber != -1) {

                ret += " at column number " + columnNumber;

            }

        }

        return ret;

    }

    /**

     * Get the line number on which an error occurred.

     * @return The line number.  Returns -1 if a line number is unavailable.

     */

    public int getLineNumber() {

        return lineNumber;

    }

    /**

     * Get the column number on which an error occurred.

     * @return The column number.  Returns -1 if a column number is unavailable.

     */

    public int getColumnNumber() {

        return columnNumber;

    }

    /**

     * Get the source of the script causing the error.

     * @return The file name of the script or some other string describing the script

     * source.  May return some implementation-defined string such as <i>&lt;unknown&gt;</i>

     * if a description of the source is unavailable.

     */

    public String getFileName() {

        return fileName;

    }

}