/* ValueBaseHelper.java -- Copyright (C) 2005 Free Software Foundation, Inc. This file is part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Classpath is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version. */ package org.omg.CORBA; import gnu.CORBA.recordTypeCode; import org.omg.CORBA.portable.InputStream; import org.omg.CORBA.portable.OutputStream; import java.io.IOException; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.io.Serializable; /** * A helper operations for the value base type ({@link ValueBase}). * * @since 1.3 * * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org) */ public abstract class ValueBaseHelper { /** * Extract the value type from the given Any. * * @param a the Any to extract from. * * @return the extracted value type. */ public static Serializable extract(Any a) { return a.extract_Value(); } /** * Return the value base helper repository id. * * @return IDL:omg.org/CORBA/ValueBase:1.0, always. */ public static String id() { return "IDL:omg.org/CORBA/ValueBase:1.0"; } /** * Insert the value base that is Serializable into * the given Any. * * @param a the Any to insert into. * @param that the value base to insert. */ public static void insert(Any a, Serializable that) { a.insert_Value(that); } /** * Read the value base from the given input stream. * This implementation initialises the {@link ObjectInputStream} * and reads from it. * * @param istream a stream to read from. * * @return the loaded value. * * @throws MARSHAL if the reading has failed due any reason. */ public static Serializable read(InputStream output) { // Explicitly prevent the stream from closing as we may need // to read the subsequent bytes as well. Stream may be auto-closed // in its finalizer. try { ObjectInputStream oin = new ObjectInputStream(output) { public void close() { } }; return (Serializable) oin.readObject(); } catch (Exception ex) { throw new MARSHAL(ex + ":" + ex.getMessage()); } } /** * Get the typecode of the value type. * @return */ public static TypeCode type() { recordTypeCode r = new recordTypeCode(TCKind.tk_value); return r; } /** * Write the value base into the given stream. This implementation * initialises the {@link ObjectOutputStream} and writes through it. * * @param ostream a stream to write to. * * @param value a value to write. * * @throws MARSHAL if the writing failed due any reason. */ public static void write(OutputStream input, Serializable value) { // Explicitly prevent the stream from closing as we may need // to read the subsequent bytes as well. Stream may be auto-closed // in its finalizer. try { ObjectOutputStream oout = new ObjectOutputStream(input) { public void close() throws IOException { flush(); } }; oout.writeObject(value); oout.flush(); } catch (IOException ex) { throw new MARSHAL(ex + ":" + ex.getMessage()); } } }