Struts example source code file (XWorkException.java)

This example Struts source code file (XWorkException.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Struts tags/keywords

deprecated, locatable, location, location, object, object, override, runtimeexception, string, throwable, throwable, xworkexception, xworkexception

The Struts XWorkException.java source code

/*
 * Copyright 2002-2007,2009 The Apache Software Foundation.
 * 
 * Licensed 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 com.opensymphony.xwork2;

import com.opensymphony.xwork2.util.location.Locatable;
import com.opensymphony.xwork2.util.location.Location;
import com.opensymphony.xwork2.util.location.LocationUtils;


/**
 * A generic runtime exception that optionally contains Location information 
 *
 * @author Jason Carreira
 */
public class XWorkException extends RuntimeException implements Locatable {

    private Location location;


    /**
     * Constructs a <code>XWorkException with no detail message.
     */
    public XWorkException() {
    }

    /**
     * Constructs a <code>XWorkException with the specified
     * detail message.
     *
     * @param s the detail message.
     */
    public XWorkException(String s) {
        this(s, null, null);
    }
    
    /**
     * Constructs a <code>XWorkException with the specified
     * detail message and target.
     *
     * @param s the detail message.
     * @param target the target of the exception.
     */
    public XWorkException(String s, Object target) {
        this(s, (Throwable) null, target);
    }

    /**
     * Constructs a <code>XWorkException with the root cause
     *
     * @param cause The wrapped exception
     */
    public XWorkException(Throwable cause) {
        this(null, cause, null);
    }
    
    /**
     * Constructs a <code>XWorkException with the root cause and target
     *
     * @param cause The wrapped exception
     * @param target The target of the exception
     */
    public XWorkException(Throwable cause, Object target) {
        this(null, cause, target);
    }

    /**
     * Constructs a <code>XWorkException with the specified
     * detail message and exception cause.
     *
     * @param s the detail message.
     * @param cause the wrapped exception
     */
    public XWorkException(String s, Throwable cause) {
        this(s, cause, null);
    }
    
    
     /**
     * Constructs a <code>XWorkException with the specified
     * detail message, cause, and target
     *
     * @param s the detail message.
     * @param cause The wrapped exception
     * @param target The target of the exception
     */
    public XWorkException(String s, Throwable cause, Object target) {
        super(s, cause);
        
        this.location = LocationUtils.getLocation(target);
        if (this.location == Location.UNKNOWN) {
            this.location = LocationUtils.getLocation(cause);
        }
    }


    /**
     * Gets the underlying cause
     * 
     * @return the underlying cause, <tt>null if no cause
     * @deprecated Use {@link #getCause()} 
     */
    @Deprecated public Throwable getThrowable() {
        return getCause();
    }


    /**
     * Gets the location of the error, if available
     *
     * @return the location, <tt>null if not available 
     */
    public Location getLocation() {
        return this.location;
    }
    
    
    /**
     * Returns a short description of this throwable object, including the 
     * location. If no detailed message is available, it will use the message
     * of the underlying exception if available.
     *
     * @return a string representation of this <code>Throwable.
     */
    @Override
    public String toString() {
        String msg = getMessage();
        if (msg == null && getCause() != null) {
            msg = getCause().getMessage();
        }

        if (location != null) {
            if (msg != null) {
                return msg + " - " + location.toString();
            } else {
                return location.toString();
            }
        } else {
            return msg;
        }
    }
}