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1: /* RemoteException.java -- common superclass for exceptions in java.rmi 2: Copyright (c) 1996, 1997, 1998, 1999, 2002 Free Software Foundation, Inc. 3: 4: This file is part of GNU Classpath. 5: 6: GNU Classpath is free software; you can redistribute it and/or modify 7: it under the terms of the GNU General Public License as published by 8: the Free Software Foundation; either version 2, or (at your option) 9: any later version. 10: 11: GNU Classpath is distributed in the hope that it will be useful, but 12: WITHOUT ANY WARRANTY; without even the implied warranty of 13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14: General Public License for more details. 15: 16: You should have received a copy of the GNU General Public License 17: along with GNU Classpath; see the file COPYING. If not, write to the 18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19: 02110-1301 USA. 20: 21: Linking this library statically or dynamically with other modules is 22: making a combined work based on this library. Thus, the terms and 23: conditions of the GNU General Public License cover the whole 24: combination. 25: 26: As a special exception, the copyright holders of this library give you 27: permission to link this library with independent modules to produce an 28: executable, regardless of the license terms of these independent 29: modules, and to copy and distribute the resulting executable under 30: terms of your choice, provided that you also meet, for each linked 31: independent module, the terms and conditions of the license of that 32: module. An independent module is a module which is not derived from 33: or based on this library. If you modify this library, you may extend 34: this exception to your version of the library, but you are not 35: obligated to do so. If you do not wish to do so, delete this 36: exception statement from your version. */ 37: 38: package java.rmi; 39: 40: import java.io.IOException; 41: 42: /** 43: * The superclass of exceptions related to RMI (remote method invocation). 44: * Classes that implement <code>java.rmi.Remote</code> should list this 45: * exception in their throws clause. 46: * 47: * @author unknown 48: * @since 1.1 49: * @status updated to 1.4 50: */ 51: public class RemoteException extends IOException 52: { 53: /** 54: * Compatible with JDK 1.2+. 55: */ 56: private static final long serialVersionUID = -5148567311918794206l; 57: 58: /** 59: * The cause of this exception. This pre-dates the exception chaining 60: * of Throwable; and although you can change this field, you are wiser 61: * to leave it alone. 62: * 63: * @serial the exception cause 64: */ 65: public Throwable detail; 66: 67: /** 68: * Create an exception with no message, and cause initialized to null. 69: */ 70: public RemoteException() 71: { 72: this(null, null); 73: } 74: 75: /** 76: * Create an exception with the given message, and cause initialized to null. 77: * 78: * @param s the message 79: */ 80: public RemoteException(String s) 81: { 82: this(s, null); 83: } 84: 85: /** 86: * Create an exception with the given message and cause. 87: * 88: * @param s the message 89: * @param ex the cause 90: */ 91: public RemoteException(String s, Throwable e) 92: { 93: super(s); 94: initCause(e); 95: detail = e; 96: } 97: 98: /** 99: * This method returns a message indicating what went wrong, in this 100: * format: 101: * <code>super.getMessage() + (detail == null ? "" 102: * : "; nested exception is:\n\t" + detail)</code>. 103: * 104: * @return the chained message 105: */ 106: public String getMessage() 107: { 108: if (detail == this || detail == null) 109: return super.getMessage(); 110: return super.getMessage() + "; nested exception is:\n\t" + detail; 111: } 112: 113: /** 114: * Returns the cause of this exception. Note that this may not be the 115: * original cause, thanks to the <code>detail</code> field being public 116: * and non-final (yuck). However, to avoid violating the contract of 117: * Throwable.getCause(), this returns null if <code>detail == this</code>, 118: * as no exception can be its own cause. 119: * 120: * @return the cause 121: * @since 1.4 122: */ 123: public Throwable getCause() 124: { 125: return detail == this ? null : detail; 126: } 127: }
GNU Classpath (0.20) |