001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.wicket.resource;
018
019import java.util.Set;
020
021import org.apache.wicket.WicketRuntimeException;
022import org.apache.wicket.markup.head.HeaderItem;
023
024/**
025 * Thrown when a circular dependency is detected between resources.
026 * 
027 * @author papegaaij
028 */
029public final class CircularDependencyException extends WicketRuntimeException
030{
031        private static final long serialVersionUID = 1L;
032
033
034        /**
035         * Construct.
036         * 
037         * @param depsDone
038         * @param newDependency
039         */
040        public CircularDependencyException(Set<HeaderItem> depsDone, HeaderItem newDependency)
041        {
042                super("Circular dependency detected in the dependency chain " + depsDone + ". " +
043                        newDependency + " is already in the chain.");
044        }
045}