Initial revision

From-SVN: r102074

libjava/classpath/gnu/CORBA/Version.java

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+/* Version.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.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+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
+conditions of the GNU General Public License cover the whole
+combination.
+
+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
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package gnu.CORBA;
+
+import java.io.IOException;
+import java.io.Serializable;
+
+import org.omg.CORBA.MARSHAL;
+
+/**
+ * A version number, represented by the major version number
+ * and the minor version number.
+ *
+ * @author Audrius Meskauskas (AudriusA@Bioinformatics.org)
+ */
+public class Version
+  implements Serializable
+{
+  /**
+   * Use serialVersionUID for interoperability.
+   */
+  private static final long serialVersionUID = 1;
+
+  /**
+   * Major number (0..256, so the byte cannot be used).
+   */
+  public final int major;
+
+  /**
+   * Minor number.
+   */
+  public final int minor;
+
+  /**
+   * Create the version with the given version numbers.
+   *
+   * @param major major number (0..255)
+   * @param minor minor number (0..255)
+   */
+  public Version(int _major, int _minor)
+  {
+    major = (byte) _major;
+    minor = (byte) _minor;
+  }
+
+  /**
+   * Returns true if the versions are equal.
+   * @param other the other version to compare.
+   *
+   * @return true if the versions are equal
+   */
+  public boolean equals(java.lang.Object other)
+  {
+    if (other == this)
+      {
+        return true;
+      }
+    if (!(other instanceof Version))
+      {
+        return false;
+      }
+
+    Version that = (Version) other;
+    return same(that);
+  }
+
+  /**
+   * Read from the input stream, major number first.
+   * @param in a stream to read from.
+   */
+  public static Version read_version(java.io.InputStream in)
+  {
+    try
+      {
+        int major = in.read() & 0xFF;
+        int minor = in.read() & 0xFF;
+        return new Version(major, minor);
+      }
+    catch (IOException ex)
+      {
+        throw new MARSHAL("IOException while reading message header");
+      }
+  }
+
+  /**
+   * Returns true if the versions are the same.
+   *
+   * @param that the other version to compare.
+   *
+   * @return true if the versions are the same.
+   */
+  public boolean same(Version that)
+  {
+    return major == that.major && minor == that.minor;
+  }
+
+  /**
+   * Returns true if the given version is higher than
+   * or equals to the version, supplied as parameter
+   * in the form of two integers.
+   *
+   * @param a_major major number of the version to compare.
+   * @param a_minor minor number of the version to compare.
+   *
+   * @return true if this version is higher than or equals to
+   * the version v.
+   */
+  public boolean since_inclusive(int a_major, int a_minor)
+  {
+    if (major > a_major)
+      return true;
+    else if (major < a_major)
+      return false;
+    else
+
+      // Major numbers are equal.
+      return minor >= a_minor;
+  }
+
+  /**
+   * Return the string representation, in the form
+   * major.minor.
+   */
+  public String toString()
+  {
+    return major + "." + minor;
+  }
+
+  /**
+   * Returs true if the given version is lower or equal to the
+   * version, specified by the provided minor and major version
+   * number. This means, the version, specified by these two numbers,
+   * should be supported by teh current version.
+   *
+   * @param a_major a major version number.
+   * @param a_minor a minor version number.
+   *
+   * @return true if the current version should be supported by the
+   * version, specified by the two passed numbers.
+   */
+  public boolean until_inclusive(int a_major, int a_minor)
+  {
+    if (major < a_major)
+      return true;
+    else if (major > a_major)
+      return false;
+    else
+
+      // Major numbers are equal.
+      return minor <= a_minor;
+  }
+
+  /**
+   * Write into the output stream, major number first.
+   *
+   * @param out a stream to write into.
+   */
+  public void write(java.io.OutputStream out)
+  {
+    try
+      {
+        out.write(major & 0xFF);
+        out.write(minor & 0xFF);
+      }
+    catch (IOException ex)
+      {
+        throw new MARSHAL("IOException while writing message header");
+      }
+  }
+}