FloatHolder.java 3.9 KB

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  1. /* FloatHolder.java --
  2. Copyright (C) 2005, 2006 Free Software Foundation, Inc.
  3. This file is part of GNU Classpath.
  4. GNU Classpath is free software; you can redistribute it and/or modify
  5. it under the terms of the GNU General Public License as published by
  6. the Free Software Foundation; either version 2, or (at your option)
  7. any later version.
  8. GNU Classpath is distributed in the hope that it will be useful, but
  9. WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. General Public License for more details.
  12. You should have received a copy of the GNU General Public License
  13. along with GNU Classpath; see the file COPYING. If not, write to the
  14. Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  15. 02110-1301 USA.
  16. Linking this library statically or dynamically with other modules is
  17. making a combined work based on this library. Thus, the terms and
  18. conditions of the GNU General Public License cover the whole
  19. combination.
  20. As a special exception, the copyright holders of this library give you
  21. permission to link this library with independent modules to produce an
  22. executable, regardless of the license terms of these independent
  23. modules, and to copy and distribute the resulting executable under
  24. terms of your choice, provided that you also meet, for each linked
  25. independent module, the terms and conditions of the license of that
  26. module. An independent module is a module which is not derived from
  27. or based on this library. If you modify this library, you may extend
  28. this exception to your version of the library, but you are not
  29. obligated to do so. If you do not wish to do so, delete this
  30. exception statement from your version. */
  31. package org.omg.CORBA;
  32. import gnu.CORBA.typecodes.PrimitiveTypeCode;
  33. import org.omg.CORBA.portable.InputStream;
  34. import org.omg.CORBA.portable.OutputStream;
  35. import org.omg.CORBA.portable.Streamable;
  36. /**
  37. * A holder for CORBA <code>float</code> that is mapped into
  38. * java <code>float</code>.
  39. *
  40. * The holders have several application areas. The end user usually
  41. * sees them implementing CORBA methods where the primitive type
  42. * is passed by reference. While CORBA (or, for example, C) supports
  43. * this, the java does not and a wrapper class is required.
  44. *
  45. * @author Audrius Meskauskas (AudriusA@Bioinformatics.org)
  46. */
  47. public final class FloatHolder
  48. implements Streamable
  49. {
  50. /**
  51. * The default type code for this holder.
  52. */
  53. private static final TypeCode t_float =
  54. new PrimitiveTypeCode(TCKind.tk_float);
  55. /**
  56. * The <code>float</code> (CORBA <code>float</code>) value,
  57. * held by this FloatHolder.
  58. */
  59. public float value;
  60. /**
  61. * Constructs an instance of FloatHolder,
  62. * initializing {@link #value} to <code>0.0</code>.
  63. */
  64. public FloatHolder()
  65. {
  66. }
  67. /**
  68. * Constructs an instance of FloatHolder,
  69. * initializing {@link #value} to the given <code>float</code>.
  70. *
  71. * @param initial_value a value that will be assigned to the
  72. * {@link #value} field.
  73. */
  74. public FloatHolder(float initial_value)
  75. {
  76. value = initial_value;
  77. }
  78. /**
  79. * Fill in the {@link #value } field by reading the required data
  80. * from the given stream. For <code>float</code>, the functionality
  81. * is delegated to
  82. * {@link org.omg.CORBA.portable.InputStream#read_float}.
  83. *
  84. * @param input the input stream to read from.
  85. */
  86. public void _read(InputStream input)
  87. {
  88. value = input.read_float();
  89. }
  90. /**
  91. * Returns the TypeCode, corresponding the CORBA type that is stored
  92. * using this holder.
  93. */
  94. public TypeCode _type()
  95. {
  96. return t_float;
  97. }
  98. /**
  99. * Write the {@link #value } field to the given stream.
  100. * For <code>float</code>, the functionality
  101. * is delegated to
  102. * {@link org.omg.CORBA.portable.OutputStream#write_float(float) }.
  103. *
  104. * @param output the output stream to write into.
  105. */
  106. public void _write(OutputStream output)
  107. {
  108. output.write_float(value);
  109. }
  110. }