deep-c-rsc/JCGO/classpath-0.93/org/omg/CosNaming/BindingIteratorHelper.java

/* BindingIteratorHelper.java --
   Copyright (C) 2005, 2006 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
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any later version.

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General Public License for more details.

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02110-1301 USA.

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permission to link this library with independent modules to produce an
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package org.omg.CosNaming;

import gnu.CORBA.Minor;
import gnu.CORBA.OrbRestricted;

import org.omg.CORBA.Any;
import org.omg.CORBA.BAD_OPERATION;
import org.omg.CORBA.BAD_PARAM;
import org.omg.CORBA.TypeCode;
import org.omg.CORBA.portable.Delegate;
import org.omg.CORBA.portable.InputStream;
import org.omg.CORBA.portable.ObjectImpl;
import org.omg.CORBA.portable.OutputStream;

/**
 * The helper operations for {@link BindingIterator}
 *
 * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
 */
public abstract class BindingIteratorHelper
{
  /**
   * The {@link BindingIterator} repository id.
   */
  private static String _id = "IDL:omg.org/CosNaming/BindingIterator:1.0";

  /**
   * Extract the binding iterator from the given {@link Any}.
   */
  public static BindingIterator extract(Any a)
  {
    try
      {
        return ((BindingIteratorHolder) a.extract_Streamable()).value;
      }
    catch (ClassCastException ex)
      {
        BAD_OPERATION bad = new BAD_OPERATION("Binding iterator expected");
        bad.initCause(ex);
        bad.minor = Minor.Any;
        throw bad;
      }
  }

  /**
   * Return the binding iterator repository id.
   */
  public static String id()
  {
    return _id;
  }

  /**
   * Insert the binding iterator into the given {@link Any}.
   */
  public static void insert(Any a, BindingIterator that)
  {
    a.insert_Streamable(new BindingIteratorHolder(that));
  }

  /**
   * Narrow the given object to the BindingIterator. The narrowing
   * means either direct casting or re-instantiating with the same
   * delegate.
   *
   * @param obj the object to cast.
   *
   * @return the casted binding iterator.
   */
  public static BindingIterator narrow(org.omg.CORBA.Object obj)
  {
    if (obj == null)
      return null;
    else if (obj instanceof BindingIterator)
      return (BindingIterator) obj;
    else if (!obj._is_a(id()))
      throw new BAD_PARAM();
    else
      {
        Delegate delegate = ((ObjectImpl) obj)._get_delegate();
        return new _BindingIteratorStub(delegate);
      }
  }
  
  /**
   * Narrow the given object to the BindingIterator. No type-checking is
   * performed to verify that the object actually supports the requested type.
   * The {@link BAD_OPERATION} will be thrown if unsupported operations are
   * invoked on the new returned reference, but no failure is expected at the
   * time of the unchecked_narrow. See OMG issue 4158.
   * 
   * @param obj the object to cast.
   * 
   * @return the casted binding iterator.
   * 
   * @since 1.5 
   */
  public static BindingIterator unchecked_narrow(org.omg.CORBA.Object obj)
  {
    if (obj == null)
      return null;
    else if (obj instanceof BindingIterator)
      return (BindingIterator) obj;
    else
      {
        // Do not call the _is_a(..).
        Delegate delegate = ((ObjectImpl) obj)._get_delegate();
        return new _BindingIteratorStub(delegate);
      }    
  }

  /**
   * Read the exception from the given CDR stream.
   */
  public static BindingIterator read(InputStream istream)
  {
    return narrow(istream.read_Object(_BindingIteratorStub.class));
  }

  /**
   * Create the type code for the BindingIterator.
   */
  public static TypeCode type()
  {
    return OrbRestricted.Singleton.create_interface_tc(id(), "BindingIterator");
  }

  /**
   * Write the exception to the CDR output stream.
   */
  public static void write(OutputStream ostream, BindingIterator value)
  {
    ostream.write_Object((org.omg.CORBA.Object) value);
  }
}