gcc/libjava/classpath/org/omg/CORBA/ServiceDetailHelper.java

/* ServiceDetailHelper.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.

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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
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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
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package org.omg.CORBA;

import gnu.CORBA.ServiceDetailHolder;

import org.omg.CORBA.portable.InputStream;
import org.omg.CORBA.portable.OutputStream;

/**
 * The helper operations on the Service Detail.
 *
 * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
 */
public abstract class ServiceDetailHelper
{
  /**
   * The service detail repository id.
   */
  private static String _id = "IDL:omg.org/CORBA/ServiceDetail:1.0";

  /**
   * The cached typecode value, computed once.
   */
  private static TypeCode typeCode;

  /**
   * Extract the service detail info from the given {@link Any}
   *
   * @param a the Any to extract from.
   *
   * @return the extracted detail.
   *
   * @throws BAD_OPERATION if the parameter holds something different
   * from the ServiceDetail.
   */
  public static ServiceDetail extract(Any a)
  {
    try
      {
        return ((ServiceDetailHolder) a.extract_Streamable()).value;
      }
    catch (ClassCastException ex)
      {
        throw new BAD_OPERATION();
      }
  }

  /**
   * Get the service detail repository id.
   *
   * @return the service detail repository id,
   * <code>IDL:omg.org/CORBA/ServiceDetail:1.0</code>, always.
   */
  public static String id()
  {
    return _id;
  }

  /**
   * Insert the service detail into the given {@link Any}.
   *
   * @param a the Any to insert into.
   *
   * @param that the detail to insert.
   */
  public static void insert(Any a, ServiceDetail that)
  {
    a.insert_Streamable(new ServiceDetailHolder(that));
  }

  /**
   * Read the service detail information from the given CDR
   * intput stream. First reads the type, then the flexible
   * length byte sequence.
   *
   * @param istream a stram to read from.
   *
   * @return the loaded service detail.
   */
  public static ServiceDetail read(InputStream istream)
  {
    ServiceDetail value = new ServiceDetail();
    value.service_detail_type = istream.read_ulong();

    int l = istream.read_long();
    value.service_detail = new byte[ l ];
    istream.read_octet_array(value.service_detail, 0, l);
    return value;
  }

  /**
   * Get the typecode of the service detail, assuming to be it
   * a structure with the two fields.
   *
   * @return the newly created or cached typecode value.
   */
  public static TypeCode type()
  {
    if (typeCode == null)
      {
        ORB orb = ORB.init();

        StructMember[] members = new StructMember[ 2 ];

        TypeCode type =
          orb.create_alias_tc(_id, "ServiceDetailType",
            orb.get_primitive_tc(TCKind.tk_ulong)
          );
        members [ 0 ] = new StructMember("service_detail_type", type, null);

        TypeCode data =
          orb.create_sequence_tc(0, orb.get_primitive_tc(TCKind.tk_octet));
        members [ 1 ] = new StructMember("service_detail", data, null);

        typeCode = orb.create_struct_tc(id(), "ServiceDetail", members);
      }
    return typeCode;
  }

  /**
   * Write the service detail data to the given CDR output stream.
   * Writes the detail type first, then the detail type data
   * as the variable length byte sequence.
   *
   * @param ostream a stream to write into.
   * @param value a value to write.
   */
  public static void write(OutputStream ostream, ServiceDetail value)
  {
    ostream.write_ulong(value.service_detail_type);
    ostream.write_long(value.service_detail.length);
    ostream.write_octet_array(value.service_detail, 0,
      value.service_detail.length
    );
  }
}