<filename>llvm-gcc-4.2-2.9/libjava/classpath/org/omg/IOP/TaggedComponentHelper.java
/* TaggedComponentHelper.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.

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General Public License for more details.

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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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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.IOP;

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

import org.omg.CORBA.Any;
import org.omg.CORBA.BAD_OPERATION;
import org.omg.CORBA.MARSHAL;
import org.omg.CORBA.ORB;
import org.omg.CORBA.StructMember;
import org.omg.CORBA.TCKind;
import org.omg.CORBA.TypeCode;
import org.omg.CORBA.portable.InputStream;
import org.omg.CORBA.portable.OutputStream;

import java.io.IOException;

/**
 * A helper operations for the {@link TaggedComponent}.
 *
 * @author <NAME>, Lithuania (<EMAIL>)
 */
public abstract class TaggedComponentHelper
{
  /**
   * Create the TaggedComponent typecode (structure, named "TaggedComponent").
   * The typecode states that the structure contains the following fields: tag,
   * component_data.
   */
  public static TypeCode type()
  {
    ORB orb = OrbRestricted.Singleton;
    StructMember[] members = new StructMember[2];
    
    TypeCode field;
    
    field = orb.create_alias_tc("IDL:omg.org/IOP/ComponentId:1.0",
                                "ComponentId",
                                orb.get_primitive_tc(TCKind.tk_ulong));
    members[0] = new StructMember("tag", field, null);
    
    field = orb.create_sequence_tc(0, orb.get_primitive_tc(TCKind.tk_octet));
    members[1] = new StructMember("component_data", field, null);
    return orb.create_struct_tc(id(), "TaggedComponent", members);
  }

  /**
   * Insert the TaggedComponent into the given Any. This method uses the
   * TaggedComponentHolder.
   *
   * @param any the Any to insert into.
   * @param that the TaggedComponent to insert.
   */
  public static void insert(Any any, TaggedComponent that)
  {
    any.insert_Streamable(new TaggedComponentHolder(that));
  }

  /**
   * Extract the TaggedComponent from given Any. This method uses the
   * TaggedComponentHolder.
   *
   * @throws BAD_OPERATION if the passed Any does not contain TaggedComponent.
   */
  public static TaggedComponent extract(Any any)
  {
    try
      {
        return ((TaggedComponentHolder) any.extract_Streamable()).value;
      }
    catch (ClassCastException cex)
      {
        BAD_OPERATION bad = new BAD_OPERATION("TaggedComponent expected");
        bad.minor = Minor.Any;        
        bad.initCause(cex);
        throw bad;
      }
  }

  /**
   * Get the TaggedComponent repository id.
   *
   * @return "IDL:omg.org/IOP/TaggedComponent:1.0", always.
   */
  public static String id()
  {
    return "IDL:omg.org/IOP/TaggedComponent:1.0";
  }

  /**
   * Read the structure from the CDR intput stream. Expects the integer
   * identifier of the tag, then the size of the tag data and then the specified
   * number of bytes, representing the data of the tag.
   *
   * @param input a org.omg.CORBA.portable stream to read from.
   */
  public static TaggedComponent read(InputStream input)
  {
    TaggedComponent value = new TaggedComponent();
    value.tag = input.read_long();
    value.component_data = new byte[input.read_long()];
    try
      {
        input.read(value.component_data);
      }
    catch (IOException e)
      {
        MARSHAL m = new MARSHAL();
        m.minor = Minor.Encapsulation;
        m.initCause(e);
        throw m;
      }
    return value;
  }

  /**
   * Write the structure to the CDR output stream. Writes the integer identifier
   * of the tag, then the size of the tag data and then the specified number of
   * bytes, representing the data of the tag.
   *
   * @param output a org.omg.CORBA.portable stream stream to write into.
   * @param value a value to write.
   */
  public static void write(OutputStream output, TaggedComponent value)
  {
    output.write_long(value.tag);
    output.write_long(value.component_data.length);

    try
      {
        output.write(value.component_data);
      }
    catch (IOException e)
      {
        MARSHAL m = new MARSHAL();
        m.minor = Minor.Encapsulation;
        m.initCause(e);
        throw m;
      }
  }
}