/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

//
// This source code implements specifications defined by the Java
// Community Process. In order to remain compliant with the specification
// DO NOT add / change / or delete method signatures!
//
package javax.xml.registry;

/**
 * Signals that a JAXR exception has occurred.
 * Note that the Exception chaining here is different from JDK1.4
 *
 * @version $Revision$ $Date$
 */
public class JAXRException extends Exception implements JAXRResponse {
    protected Throwable cause;

    public JAXRException() {
    }

    public JAXRException(String message) {
        super(message);
    }

    public JAXRException(Throwable cause) {
        super(cause);
        this.cause = cause;
    }

    public JAXRException(String message, Throwable cause) {
        super(message, cause);
        this.cause = cause;
    }

    public synchronized Throwable initCause(Throwable cause) {

        if (this.cause != null) {
            throw new IllegalStateException("Cannot overwrite cause.");
        }

        this.cause = cause;
        return this;
    }

    public String getMessage() {
        String message = super.getMessage();
        return (message == null && cause != null) ? cause.getMessage() : message;
    }

    public Throwable getCause() {
        return cause;
    }

    public String getRequestId() {
        return null;
    }

    public int getStatus() {
        return 0;
    }

    public boolean isAvailable() throws JAXRException {
        return true;
    }
}