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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: 43: import org.omg.CORBA.Any; 44: import org.omg.CORBA.BAD_OPERATION; 45: import org.omg.CORBA.BAD_PARAM; 46: import org.omg.CORBA.ORB; 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: * The cached {@link NamingContext} typecode. 67: */ 68: private static TypeCode typeCode; 69: 70: /** 71: * Extract the naming context from the given {@link Any}. 72: */ 73: public static NamingContext extract(Any a) 74: { 75: try 76: { 77: return ((NamingContextHolder) a.extract_Streamable()).value; 78: } 79: catch (ClassCastException ex) 80: { 81: BAD_OPERATION bad = new BAD_OPERATION("Naming context expected"); 82: bad.initCause(ex); 83: bad.minor = Minor.Any; 84: throw bad; 85: } 86: } 87: 88: /** 89: * Get the {@link NamingContext} repository id. 90: */ 91: public static String id() 92: { 93: return _id; 94: } 95: 96: /** 97: * Insert the naming context into the given {@link Any} 98: */ 99: public static void insert(Any a, NamingContext that) 100: { 101: a.insert_Streamable(new NamingContextHolder(that)); 102: } 103: 104: /** 105: * Cast the passed object into the NamingContext. If the 106: * object has a different java type, create an instance 107: * of the NamingContext, using the same delegate, as for 108: * the passed parameter. 109: * 110: * If the object repository Id indicates that it is an instance of 111: * {@link NamingContextExt} that is a subclass of the NamingContext, 112: * the functionality is delegated to {@link NamingContextHelper#narrow}. 113: * 114: * @param obj the object to cast. 115: * @return casted instance. 116: * 117: * @throws BAD_PARAM if the passed object is not an instance of 118: * {@link NamingContext} or {@link NamingContextExt}. 119: */ 120: public static NamingContext narrow(org.omg.CORBA.Object obj) 121: { 122: if (obj == null) 123: return null; 124: else if (obj instanceof NamingContext) 125: return (NamingContext) obj; 126: else if (obj._is_a(id())) 127: { 128: Delegate delegate = ((ObjectImpl) obj)._get_delegate(); 129: return new _NamingContextStub(delegate); 130: } 131: else if (obj._is_a(NamingContextExtHelper.id())) 132: return NamingContextExtHelper.narrow(obj); 133: else 134: throw new BAD_PARAM(); 135: } 136: 137: /** 138: * Narrow the given object to the NamingContext. No type-checking is performed 139: * to verify that the object actually supports the requested type. The 140: * {@link BAD_OPERATION} will be thrown if unsupported operations are invoked 141: * on the new returned reference, but no failure is expected at the time of 142: * the unchecked_narrow. 143: * 144: * @param obj the object to cast. 145: * 146: * @return the casted NamingContext. 147: * 148: * @since 1.5 149: * 150: * @see OMG issue 4158. 151: */ 152: public static NamingContext unchecked_narrow(org.omg.CORBA.Object obj) 153: { 154: if (obj == null) 155: return null; 156: else if (obj instanceof NamingContext) 157: return (NamingContext) obj; 158: else 159: { 160: // Do not call the _is_a(..). 161: Delegate delegate = ((ObjectImpl) obj)._get_delegate(); 162: return new _NamingContextStub(delegate); 163: } 164: } 165: 166: /** 167: * Read the naming context from the given CDR input stream. 168: */ 169: public static NamingContext read(InputStream istream) 170: { 171: return narrow(istream.read_Object(_NamingContextStub.class)); 172: } 173: 174: /** 175: * Get the type code of the {@link NamingContext}. 176: */ 177: public static TypeCode type() 178: { 179: if (typeCode == null) 180: typeCode = ORB.init().create_interface_tc(id(), "NamingContext"); 181: return typeCode; 182: } 183: 184: /** 185: * Write the given naming context into the given CDR output stream. 186: */ 187: public static void write(OutputStream ostream, NamingContext value) 188: { 189: ostream.write_Object(value); 190: } 191: }
GNU Classpath (0.20) |