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1: /* ReferenceTypeId.java -- a base class for all reference type IDs 2: Copyright (C) 2005 Free Software Foundation 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: terms of your choice, provided that you also meet, for each linked 32: independent module, the terms and conditions of the license of that 33: module. An independent module is a module which is not derived from 34: or based on this library. If you modify this library, you may extend 35: this exception to your version of the library, but you are not 36: obligated to do so. If you do not wish to do so, delete this 37: exception statement from your version. */ 38: 39: 40: package gnu.classpath.jdwp.id; 41: 42: import gnu.classpath.jdwp.exception.InvalidClassException; 43: 44: import java.io.DataOutputStream; 45: import java.io.IOException; 46: 47: /** 48: * Base class for reference type IDs. This class usurps 49: * <code>JdwpId</code>'s tag member for its own use (type tag). 50: * 51: * @author Keith Seitz <keiths@redhat.com> 52: */ 53: public class ReferenceTypeId 54: extends JdwpId 55: { 56: /** 57: * Constructor used by {Array,Interface,Class}ReferenceTypeId 58: */ 59: public ReferenceTypeId (byte tag) 60: { 61: super (tag); 62: } 63: 64: /** 65: * Returns the size of this ID type 66: */ 67: public int size () 68: { 69: return 8; 70: } 71: 72: /** 73: * Gets the class associated with this ID 74: * 75: * @returns the class 76: * @throws InvalidClassException if the class is not valid 77: */ 78: public Class getType () 79: throws InvalidClassException 80: { 81: Class clazz = (Class) _reference.get (); 82: if (clazz == null) 83: throw new InvalidClassException (_id); 84: 85: return clazz; 86: } 87: 88: /** 89: * Outputs the reference type ID to the given output stream 90: * 91: * @param outStream the stream to which to write the data 92: * @throws IOException for errors writing to the stream 93: */ 94: public void write (DataOutputStream outStream) 95: throws IOException 96: { 97: outStream.writeLong (_id); 98: } 99: }