/* DoubleSeqHolder.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
the Free Software Foundation; either version 2, or (at your option)
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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.typecodes.ArrayTypeCode;

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

/**
 * A sequence holder for CORBA <code>DoubleSeq</code> that is mapped into
 * java <code>double[]</code>.
 *
 * @author Audrius Meskauskas (AudriusA@Bioinformatics.org)
 */
public final class DoubleSeqHolder
  implements Streamable
{
  /**
   * The <code>double[]</code> (CORBA <code>DoubleSeq</code>) value,
   * held by this DoubleSeqHolder.
   */
  public double[] value;

  /**
   * The type code for this holder. Each holder has a different instance.
   */
  private final ArrayTypeCode typecode =
    new ArrayTypeCode(TCKind.tk_double);

  /**
   * Constructs an instance of DoubleSeqHolder,
   * initializing {@link #value} to <code>null</code>.
   */
  public DoubleSeqHolder()
  {
  }

  /**
   * Constructs an instance of DoubleSeqHolder,
   * initializing {@link #value} to the given <code>double[]</code>.
   *
   * @param initial_value a value that will be assigned to the
   * {@link #value} field.
   */
  public DoubleSeqHolder(double[] initial_value)
  {
    value = initial_value;
    typecode.setLength(value.length);
  }

  /**
   * Fill in the {@link #value } field by reading the required data
   * from the given stream. This method first reads the array size
   * (as CORBA <code>long</code>) and then calls the
   * {@link org.omg.CORBA.portable.InputStream#read_double_array }.
   *
   * @param input the input stream to read from.
   */
  public void _read(InputStream input)
  {
    value = new double[ input.read_long() ];
    input.read_double_array(value, 0, value.length);
    typecode.setLength(value.length);
  }

  /**
   * Returns the TypeCode, corresponding the CORBA type that is stored
   * using this holder.
   */
  public TypeCode _type()
  {
    return typecode;
  }

  /**
   * Write the {@link #value } field to the given stream.
   * This method first writes the array size
   * (as CORBA <code>long</code>) and then calls the
   * {@link org.omg.CORBA.portable.OutputStream#write_double_array }.
   *
   * @param output the output stream to write into.
   */
  public void _write(OutputStream output)
  {
    output.write_long(value.length);
    output.write_double_array(value, 0, value.length);
  }
}