1 /* 2 * Grapht, an open source dependency injector. 3 * Copyright 2014-2015 various contributors (see CONTRIBUTORS.txt) 4 * Copyright 2010-2014 Regents of the University of Minnesota 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU Lesser General Public License as 8 * published by the Free Software Foundation; either version 2.1 of the 9 * License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 13 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more 14 * details. 15 * 16 * You should have received a copy of the GNU General Public License along with 17 * this program; if not, write to the Free Software Foundation, Inc., 51 18 * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 19 */ 20 package org.grouplens.grapht.solver; 21 22 import org.grouplens.grapht.ResolutionException; 23 import org.grouplens.grapht.reflect.Desire; 24 25 /** 26 * Thrown by when a cyclic dependency is detected and could not be broken or 27 * bypassed by the solver. 28 * 29 * @author <a href="http://grouplens.org">GroupLens Research</a> 30 */ 31 public class CyclicDependencyException extends ResolutionException { 32 private static final long serialVersionUID = 1L; 33 34 private final Desire desire; 35 36 public CyclicDependencyException(Desire desire, String msg) { 37 super(msg); 38 this.desire = desire; 39 } 40 41 /** 42 * @return The current desire that triggered the cycle detection 43 */ 44 public Desire getDesire() { 45 return desire; 46 } 47 48 @Override 49 public String getMessage() { 50 return new StringBuilder("Unable to satisfy desire: ") 51 .append(format(desire.getInjectionPoint())) 52 .append('\n') 53 .append("Reason: ") 54 .append(super.getMessage()) 55 .toString(); 56 } 57 }