* src/classes/gnu: Renamed to src/classes/gnuclasspath.

[cacao.git] / src / classes / gnuclasspath / gnu / java / lang / VMCPStringBuilder.java

diff --git a/src/classes/gnuclasspath/gnu/java/lang/VMCPStringBuilder.java b/src/classes/gnuclasspath/gnu/java/lang/VMCPStringBuilder.java
new file mode 100644 (file)
index 0000000..ca1c39d
--- /dev/null
+++ b/src/classes/gnuclasspath/gnu/java/lang/VMCPStringBuilder.java
@@ -0,0 +1,108 @@
+/* VMCPStringBuilder.java -- Growable strings without locking or copying
+   Copyright (C) 2008 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.lang;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+
+/**
+ * This class provides VM support for CPStringBuilder
+ * by allowing the package-private constructor
+ * of java.lang.String to be invoked.  The default
+ * implementation uses reflection.  VMs may replace
+ * this class with a more efficient version.
+ */
+final class VMCPStringBuilder
+{
+
+  /**
+   * The package-private constructor for String objects without copying.
+   */
+//   private static final Constructor<String> cons;
+
+//   static
+//   {
+//     try
+//       {
+//     cons = String.class.getDeclaredConstructor(char[].class, Integer.TYPE,
+//                                                Integer.TYPE, Boolean.TYPE);
+//     cons.setAccessible(true);
+//       }
+//     catch (NoSuchMethodException e)
+//       {
+//     throw (Error) 
+//       new InternalError("Could not get no-copy String constructor").initCause(e);
+//       }
+//   }
+
+  /**
+   * Convert this <code>StringBuilder</code> to a <code>String</code>. The
+   * String is composed of the characters currently in this StringBuilder. Note
+   * that the result is not a copy, so future modifications to this buffer
+   * do affect the String.
+   *
+   * @param value the buffered characters.
+   * @param startIndex the index at which to start taking characters from the buffer.
+   * @param count the number of characters used in the buffer.
+   * @return the characters in this StringBuilder
+   */
+//   public static String toString(char[] value, int startIndex, int count)
+//   {
+//     try
+//       {
+//     return cons.newInstance(value, startIndex, count, true);
+//       }
+//     catch (InstantiationException e)
+//       {
+//     throw (Error) 
+//       new InternalError("Could not instantiate no-copy String constructor").initCause(e);
+//       }
+//     catch (IllegalAccessException e)
+//       {
+//     throw (Error) 
+//       new InternalError("Could not access no-copy String constructor").initCause(e);
+//       }
+//     catch (InvocationTargetException e)
+//       {
+//     throw (Error) 
+//       new InternalError("Error calling no-copy String constructor").initCause(e);
+//       }
+//   }
+  public static native String toString(char[] value, int startIndex, int count);
+
+}