--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/src/share/classes/com/sun/tools/javac/util/Warner.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2003-2006 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package com.sun.tools.javac.util;
+
+import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
+
+/**
+ * An interface to support optional warnings, needed for support of
+ * unchecked conversions and unchecked casts.
+ *
+ * <p>Nothing described in this source file is part of any supported
+ * API.  If you write code that depends on this, you do so at your own
+ * risk.  This code and its internal interfaces are subject to change
+ * or deletion without notice.
+ */
+public class Warner {
+    public static final Warner noWarnings = new Warner();
+
+    private DiagnosticPosition pos = null;
+    public boolean warned = false;
+    public boolean unchecked = false;
+
+    public DiagnosticPosition pos() {
+        return pos;
+    }
+
+    public void warnUnchecked() {
+        warned = true;
+        unchecked = true;
+    }
+    public void silentUnchecked() {
+        unchecked = true;
+    }
+
+    public Warner(DiagnosticPosition pos) {
+        this.pos = pos;
+    }
+
+    public Warner() {
+        this(null);
+    }
+}