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jeremybenn |
/* WStringHolder.java --
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Copyright (C) 2005 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.CORBA;
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import gnu.CORBA.typecodes.StringTypeCode;
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import org.omg.CORBA.TCKind;
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import org.omg.CORBA.TypeCode;
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import org.omg.CORBA.portable.InputStream;
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import org.omg.CORBA.portable.OutputStream;
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import org.omg.CORBA.portable.Streamable;
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/**
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* A holder for CORBA <code>wstring</code> that is mapped into
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* java <code>String</code>. This holder writes and reads differently
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* from the StringHolder.
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*
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* The holders have several application areas. The end user usually
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* sees them implementing CORBA methods where the primitive type
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* is passed by reference. While CORBA (or, for example, C) supports
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* this, the java does not and a wrapper class is required.
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*
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* @author Audrius Meskauskas (AudriusA@Bioinformatics.org)
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*/
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public class WStringHolder
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implements Streamable
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{
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/**
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* The default type code for this holder.
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*/
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private static final StringTypeCode t_string =
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new StringTypeCode(TCKind.tk_wstring);
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/**
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* The <code>String</code> (CORBA <code>string</code>) value,
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* held by this WStringHolder.
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*/
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public String value;
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/**
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* Constructs an instance of WStringHolder,
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* initializing {@link #value} to <code>null</code>.
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*/
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public WStringHolder()
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{
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}
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/**
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* Constructs an instance of WStringHolder,
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* initializing {@link #value} to the given <code>String</code>.
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*
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* @param initial_value a value that will be assigned to the
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* {@link #value} field.
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*/
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public WStringHolder(String initial_value)
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{
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value = initial_value;
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}
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/**
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* Fill in the {@link #value } field by reading the required data
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* from the given stream. For <code>string</code>, the functionality
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* is delegated to
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* {@link org.omg.CORBA.portable.InputStream#read_wstring}.
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*
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* @param input the input stream to read from.
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*/
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public void _read(InputStream input)
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{
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value = input.read_wstring();
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}
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/**
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* Returns the TypeCode, corresponding the CORBA type that is stored
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* using this holder. The {@link TypeCode#length()} method of the
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* returned typecode always returns 0.
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*/
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public TypeCode _type()
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{
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return t_string;
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}
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/**
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* Write the {@link #value } field to the given stream.
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* For <code>string</code>, the functionality
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* is delegated to
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* {@link org.omg.CORBA.portable.OutputStream#write_wstring(String) }.
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*
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* @param output the output stream to write into.
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*/
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public void _write(OutputStream output)
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{
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output.write_wstring(value);
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}
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}
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