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/*
* Copyright (c) OSGi Alliance (2007, 2014). All Rights Reserved.
*
* 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 org.osgi.framework;
/**
* A service exception used to indicate that a service problem occurred.
*
* <p>
* A {@code ServiceException} object is created by the Framework or service
* implementation to denote an exception condition in the service. A type code
* is used to identify the exception type for future extendability. Service
* implementations may also create subclasses of {@code ServiceException}. When
* subclassing, the subclass should set the type to {@link #SUBCLASSED} to
* indicate that {@code ServiceException} has been subclassed.
*
* <p>
* This exception conforms to the general purpose exception chaining mechanism.
*
* @author $Id: 32a515460813c702b127f65dda91cd23781b2a98 $
* @since 1.5
*/
public class ServiceException extends RuntimeException {
static final long serialVersionUID = 3038963223712959631L;
/**
* Type of service exception.
*/
private final int type;
/**
* No exception type is unspecified.
*/
public static final int UNSPECIFIED = 0;
/**
* The service has been unregistered.
*/
public static final int UNREGISTERED = 1;
/**
* The service factory produced an invalid service object.
*/
public static final int FACTORY_ERROR = 2;
/**
* The service factory threw an exception.
*/
public static final int FACTORY_EXCEPTION = 3;
/**
* The exception is a subclass of ServiceException. The subclass should be
* examined for the type of the exception.
*/
public static final int SUBCLASSED = 4;
/**
* An error occurred invoking a remote service.
*/
public static final int REMOTE = 5;
/**
* The service factory resulted in a recursive call to itself for the
* requesting bundle.
*
* @since 1.6
*/
public static final int FACTORY_RECURSION = 6;
/**
* An asynchronous operation was unable to obtain the service.
*
* @since 1.8
*/
public static final int ASYNC_ERROR = 7;
/**
* Creates a {@code ServiceException} with the specified message and
* exception cause.
*
* @param msg The associated message.
* @param cause The cause of this exception.
*/
public ServiceException(String msg, Throwable cause) {
this(msg, UNSPECIFIED, cause);
}
/**
* Creates a {@code ServiceException} with the specified message.
*
* @param msg The message.
*/
public ServiceException(String msg) {
this(msg, UNSPECIFIED);
}
/**
* Creates a {@code ServiceException} with the specified message, type and
* exception cause.
*
* @param msg The associated message.
* @param type The type for this exception.
* @param cause The cause of this exception.
*/
public ServiceException(String msg, int type, Throwable cause) {
super(msg, cause);
this.type = type;
}
/**
* Creates a {@code ServiceException} with the specified message and type.
*
* @param msg The message.
* @param type The type for this exception.
*/
public ServiceException(String msg, int type) {
super(msg);
this.type = type;
}
/**
* Returns the type for this exception or {@code UNSPECIFIED} if the type
* was unspecified or unknown.
*
* @return The type of this exception.
*/
public int getType() {
return type;
}
}
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