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1: /* NamingContextHelper.java -- 2: Copyright (C) 2005, 2006 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: 39: package org.omg.CosNaming; 40: 41: import gnu.CORBA.Minor; 42: import gnu.CORBA.OrbRestricted; 43: 44: import org.omg.CORBA.Any; 45: import org.omg.CORBA.BAD_OPERATION; 46: import org.omg.CORBA.BAD_PARAM; 47: import org.omg.CORBA.TypeCode; 48: import org.omg.CORBA.portable.Delegate; 49: import org.omg.CORBA.portable.InputStream; 50: import org.omg.CORBA.portable.ObjectImpl; 51: import org.omg.CORBA.portable.OutputStream; 52: 53: /** 54: * The helper operations for the naming context. 55: * 56: * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org) 57: */ 58: public abstract class NamingContextHelper 59: { 60: /** 61: * The naming context repository id. 62: */ 63: private static String _id = "IDL:omg.org/CosNaming/NamingContext:1.0"; 64: 65: /** 66: * Extract the naming context from the given {@link Any}. 67: */ 68: public static NamingContext extract(Any a) 69: { 70: try 71: { 72: return ((NamingContextHolder) a.extract_Streamable()).value; 73: } 74: catch (ClassCastException ex) 75: { 76: BAD_OPERATION bad = new BAD_OPERATION("Naming context expected"); 77: bad.initCause(ex); 78: bad.minor = Minor.Any; 79: throw bad; 80: } 81: } 82: 83: /** 84: * Get the {@link NamingContext} repository id. 85: */ 86: public static String id() 87: { 88: return _id; 89: } 90: 91: /** 92: * Insert the naming context into the given {@link Any} 93: */ 94: public static void insert(Any a, NamingContext that) 95: { 96: a.insert_Streamable(new NamingContextHolder(that)); 97: } 98: 99: /** 100: * Cast the passed object into the NamingContext. If the 101: * object has a different java type, create an instance 102: * of the NamingContext, using the same delegate, as for 103: * the passed parameter. 104: * 105: * If the object repository Id indicates that it is an instance of 106: * {@link NamingContextExt} that is a subclass of the NamingContext, 107: * the functionality is delegated to {@link NamingContextHelper#narrow}. 108: * 109: * @param obj the object to cast. 110: * @return casted instance. 111: * 112: * @throws BAD_PARAM if the passed object is not an instance of 113: * {@link NamingContext} or {@link NamingContextExt}. 114: */ 115: public static NamingContext narrow(org.omg.CORBA.Object obj) 116: { 117: if (obj == null) 118: return null; 119: else if (obj instanceof NamingContext) 120: return (NamingContext) obj; 121: else if (obj._is_a(id())) 122: { 123: Delegate delegate = ((ObjectImpl) obj)._get_delegate(); 124: return new _NamingContextStub(delegate); 125: } 126: else if (obj._is_a(NamingContextExtHelper.id())) 127: return NamingContextExtHelper.narrow(obj); 128: else 129: throw new BAD_PARAM(); 130: } 131: 132: /** 133: * Narrow the given object to the NamingContext. No type-checking is performed 134: * to verify that the object actually supports the requested type. The 135: * {@link BAD_OPERATION} will be thrown if unsupported operations are invoked 136: * on the new returned reference, but no failure is expected at the time of 137: * the unchecked_narrow. See OMG issue 4158. 138: * 139: * @param obj the object to cast. 140: * 141: * @return the casted NamingContext. 142: */ 143: public static NamingContext unchecked_narrow(org.omg.CORBA.Object obj) 144: { 145: if (obj == null) 146: return null; 147: else if (obj instanceof NamingContext) 148: return (NamingContext) obj; 149: else 150: { 151: // Do not call the _is_a(..). 152: Delegate delegate = ((ObjectImpl) obj)._get_delegate(); 153: return new _NamingContextStub(delegate); 154: } 155: } 156: 157: /** 158: * Read the naming context from the given CDR input stream. 159: */ 160: public static NamingContext read(InputStream istream) 161: { 162: return narrow(istream.read_Object(_NamingContextStub.class)); 163: } 164: 165: /** 166: * Get the type code of the {@link NamingContext}. 167: */ 168: public static TypeCode type() 169: { 170: return OrbRestricted.Singleton.create_interface_tc(id(), "NamingContext"); 171: } 172: 173: /** 174: * Write the given naming context into the given CDR output stream. 175: */ 176: public static void write(OutputStream ostream, NamingContext value) 177: { 178: ostream.write_Object(value); 179: } 180: }