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1: /* NamingContextHelper.java -- 2: Copyright (C) 2005 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.ORB; 48: import org.omg.CORBA.TypeCode; 49: import org.omg.CORBA.portable.Delegate; 50: import org.omg.CORBA.portable.InputStream; 51: import org.omg.CORBA.portable.ObjectImpl; 52: import org.omg.CORBA.portable.OutputStream; 53: 54: /** 55: * The helper operations for the naming context. 56: * 57: * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org) 58: */ 59: public abstract class NamingContextHelper 60: { 61: /** 62: * The naming context repository id. 63: */ 64: private static String _id = "IDL:omg.org/CosNaming/NamingContext:1.0"; 65: 66: /** 67: * Extract the naming context from the given {@link Any}. 68: */ 69: public static NamingContext extract(Any a) 70: { 71: try 72: { 73: return ((NamingContextHolder) a.extract_Streamable()).value; 74: } 75: catch (ClassCastException ex) 76: { 77: BAD_OPERATION bad = new BAD_OPERATION("Naming context expected"); 78: bad.initCause(ex); 79: bad.minor = Minor.Any; 80: throw bad; 81: } 82: } 83: 84: /** 85: * Get the {@link NamingContext} repository id. 86: */ 87: public static String id() 88: { 89: return _id; 90: } 91: 92: /** 93: * Insert the naming context into the given {@link Any} 94: */ 95: public static void insert(Any a, NamingContext that) 96: { 97: a.insert_Streamable(new NamingContextHolder(that)); 98: } 99: 100: /** 101: * Cast the passed object into the NamingContext. If the 102: * object has a different java type, create an instance 103: * of the NamingContext, using the same delegate, as for 104: * the passed parameter. 105: * 106: * If the object repository Id indicates that it is an instance of 107: * {@link NamingContextExt} that is a subclass of the NamingContext, 108: * the functionality is delegated to {@link NamingContextHelper#narrow}. 109: * 110: * @param obj the object to cast. 111: * @return casted instance. 112: * 113: * @throws BAD_PARAM if the passed object is not an instance of 114: * {@link NamingContext} or {@link NamingContextExt}. 115: */ 116: public static NamingContext narrow(org.omg.CORBA.Object obj) 117: { 118: if (obj == null) 119: return null; 120: else if (obj instanceof NamingContext) 121: return (NamingContext) obj; 122: else if (obj._is_a(id())) 123: { 124: Delegate delegate = ((ObjectImpl) obj)._get_delegate(); 125: return new _NamingContextStub(delegate); 126: } 127: else if (obj._is_a(NamingContextExtHelper.id())) 128: return NamingContextExtHelper.narrow(obj); 129: else 130: throw new BAD_PARAM(); 131: } 132: 133: /** 134: * Narrow the given object to the NamingContext. No type-checking is performed 135: * to verify that the object actually supports the requested type. The 136: * {@link BAD_OPERATION} will be thrown if unsupported operations are invoked 137: * on the new returned reference, but no failure is expected at the time of 138: * the unchecked_narrow. 139: * 140: * @param obj the object to cast. 141: * 142: * @return the casted NamingContext. 143: * 144: * @since 1.5 145: * 146: * @see OMG issue 4158. 147: */ 148: public static NamingContext unchecked_narrow(org.omg.CORBA.Object obj) 149: { 150: if (obj == null) 151: return null; 152: else if (obj instanceof NamingContext) 153: return (NamingContext) obj; 154: else 155: { 156: // Do not call the _is_a(..). 157: Delegate delegate = ((ObjectImpl) obj)._get_delegate(); 158: return new _NamingContextStub(delegate); 159: } 160: } 161: 162: /** 163: * Read the naming context from the given CDR input stream. 164: */ 165: public static NamingContext read(InputStream istream) 166: { 167: return narrow(istream.read_Object(_NamingContextStub.class)); 168: } 169: 170: /** 171: * Get the type code of the {@link NamingContext}. 172: */ 173: public static TypeCode type() 174: { 175: return OrbRestricted.Singleton.create_interface_tc(id(), "NamingContext"); 176: } 177: 178: /** 179: * Write the given naming context into the given CDR output stream. 180: */ 181: public static void write(OutputStream ostream, NamingContext value) 182: { 183: ostream.write_Object(value); 184: } 185: }