001/*
002 * Licensed to DuraSpace under one or more contributor license agreements.
003 * See the NOTICE file distributed with this work for additional information
004 * regarding copyright ownership.
005 *
006 * DuraSpace licenses this file to you under the Apache License,
007 * Version 2.0 (the "License"); you may not use this file except in
008 * compliance with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018
019package org.fcrepo.kernel.api.exception;
020
021import static org.apache.http.HttpStatus.SC_PRECONDITION_FAILED;
022import static org.apache.http.HttpStatus.SC_NOT_MODIFIED;
023
024/**
025 * @author dbernstein
026 * @since Jun 22, 2017
027 */
028public class PreconditionException extends RepositoryRuntimeException {
029
030    private static final long serialVersionUID = 1L;
031
032    private int httpStatus;
033
034    /**
035     * Ordinary constructor
036     *
037     * @param msg error message
038     * @param httpStatus the http status code
039     */
040    public PreconditionException(final String msg, final int httpStatus) {
041        super(msg);
042        if (httpStatus != SC_PRECONDITION_FAILED && httpStatus != SC_NOT_MODIFIED) {
043            throw new IllegalArgumentException("Invalid httpStatus (" + httpStatus +
044                    "). The http status for PreconditionExceptions must be " +
045                    SC_PRECONDITION_FAILED + " or " + SC_NOT_MODIFIED);
046        }
047        this.httpStatus = httpStatus;
048    }
049
050    /**
051     * @return the httpStatus
052     */
053    public int getHttpStatus() {
054        return httpStatus;
055    }
056}