Imported GNU Classpath 0.20

Imported GNU Classpath 0.20
       * Makefile.am (AM_CPPFLAGS): Add classpath/include.
       * java/nio/charset/spi/CharsetProvider.java: New override file.
       * java/security/Security.java: Likewise.
       * sources.am: Regenerated.
       * Makefile.in: Likewise.

From-SVN: r109831

libjava/classpath/gnu/java/beans/encoder/ObjectId.java

@@ -0,0 +1,132 @@
+/* ObjectId.java -- Simple object identification mechanism for XML encoding.
+ 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.java.beans.encoder;
+
+import java.util.HashMap;
+
+/**
+ * <p>
+ * ObjectId provides an object identification mechanism which gives each object
+ * a name in the form <code>&lt;class&gt;&lt;Nameindex&gt;</code>.
+ * </p>
+ * 
+ * <p>
+ * Each id can be in an unused state which means that only one instance of the
+ * object is in use and a special id is not needed. Certain {@link
+ * gnu.java.beans.encoder.elements.Element} subclasses use this feature to find
+ * out whether they write the "id" attribute or not.
+ * </p>
+ * <p>
+ * An <code>ObjectId</code> instance is typically given to multiple objects.
+ * The second user should then invoke the {@link #init} method to generate the
+ * identification string and bring the id in the 'used' state.
+ * </p>
+ * 
+ * @author Robert Schuster (robertschuster@fsfe.org)
+ */
+public class ObjectId
+{
+  /**
+   * Stores the index an object of a specific type should be given.
+   */
+  private static HashMap nameIndices = new HashMap();
+
+  private String id;
+
+  private Class klass;
+
+  ObjectId(Class klass)
+  {
+    this.klass = klass;
+  }
+
+  public boolean isUnused()
+  {
+    return id == null;
+  }
+
+  public String toString()
+  {
+    return (id != null) ? id : "<unused id>";
+  }
+
+  /**
+   * <p>
+   * Generates a simple Id by concatenating a class name with a self-increasing
+   * number.
+   * </p>
+   */
+  public void init()
+  {
+    assert (klass != null);
+
+    if (id != null)
+      return;
+
+    Integer count = (Integer) nameIndices.get(klass);
+    if (count == null)
+      {
+        count = Integer.valueOf(0);
+      }
+
+    if (klass.isArray())
+      {
+        Class ct = klass.getComponentType();
+        if (ct == Boolean.TYPE)
+          id = "booleanArray" + count.intValue();
+        else if (ct == Byte.TYPE)
+          id = "byteArray" + count.intValue();
+        else if (ct == Short.TYPE)
+          id = "shortArray" + count.intValue();
+        else if (ct == Integer.TYPE)
+          id = "intArray" + count.intValue();
+        else if (ct == Long.TYPE)
+          id = "longArray" + count.intValue();
+        else if (ct == Float.TYPE)
+          id = "floatArray" + count.intValue();
+        else if (ct == Double.TYPE)
+          id = "doubleArray" + count.intValue();
+      }
+    else
+      id = klass.getName() + count.intValue();
+
+    nameIndices.put(klass, Integer.valueOf(count.intValue() + 1));
+  }
+
+}