PropertyAccessException.java

/**************************************************************************************
 * Copyright (C) 2008 EsperTech, Inc. All rights reserved.                            *
 * http://esper.codehaus.org                                                          *
 * http://www.espertech.com                                                           *
 * ---------------------------------------------------------------------------------- *
 * The software in this package is published under the terms of the GPL license       *
 * a copy of which has been included with this distribution in the license.txt file.  *
 **************************************************************************************/
package com.espertech.esper.client;

/**
 * This exception is thrown to indicate a problem with a accessing a property of an {@link com.espertech.esper.client.EventBean}.
 */
public final class PropertyAccessException extends RuntimeException
{
    private String expression;
    private static final long serialVersionUID = 6935348296074757184L;

    /**
     * Constructor.
     * @param message is the error message
     * @param propertyExpression property expression
     */
    public PropertyAccessException(final String message, String propertyExpression)
    {
        super(message);
        this.expression = propertyExpression;
    }

    /**
     * Constructor for an inner exception and message.
     * @param message is the error message
     * @param cause is the inner exception
     */
    public PropertyAccessException(final String message, final Throwable cause)
    {
        super(message, cause);
    }

    /**
     * Constructor for an inner exception and message.
     * @param message is the error message
     */
    public PropertyAccessException(final String message)
    {
        super(message);
    }

    /**
     * Constructor.
     * @param cause is the inner exception
     */
    public PropertyAccessException(final Throwable cause)
    {
        super(cause);
    }

    public String getMessage() {
        StringBuilder msg;
        if (super.getMessage() != null)
        {
            msg = new StringBuilder(super.getMessage());
        }
        else
        {
            msg = new StringBuilder("Unexpected exception");
        }
        if (expression != null)
        {
            msg.append(" [");
            msg.append(expression);
            msg.append(']');
        }
        return msg.toString();
    }
}