--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/src/share/classes/com/sun/tools/apt/mirror/AptEnv.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,107 @@
+/*
+ * Copyright 2004 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.apt.mirror;
+
+
+import com.sun.tools.apt.mirror.declaration.DeclarationMaker;
+import com.sun.tools.apt.mirror.type.TypeMaker;
+import com.sun.tools.javac.code.*;
+import com.sun.tools.javac.code.Symbol.CompletionFailure;
+import com.sun.tools.javac.comp.Attr;
+import com.sun.tools.javac.comp.Enter;
+import com.sun.tools.javac.util.Context;
+import com.sun.tools.javac.util.Name;
+
+
+/**
+ * The environment for a run of apt.
+ */
+
+public class AptEnv {
+
+    public Name.Table names;            // javac's name table
+    public Symtab symtab;               // javac's predefined symbols
+    public Types jctypes;               // javac's type utilities
+    public Enter enter;                 // javac's enter phase
+    public Attr attr;                   // javac's attr phase (to evaluate
+                                        //   constant initializers)
+    public TypeMaker typeMaker;         // apt's internal type utilities
+    public DeclarationMaker declMaker;  // apt's internal declaration utilities
+
+
+    private static final Context.Key<AptEnv> aptEnvKey =
+            new Context.Key<AptEnv>();
+
+    public static AptEnv instance(Context context) {
+        AptEnv instance = context.get(aptEnvKey);
+        if (instance == null) {
+            instance = new AptEnv(context);
+        }
+        return instance;
+    }
+
+    private AptEnv(Context context) {
+        context.put(aptEnvKey, this);
+
+        names = Name.Table.instance(context);
+        symtab = Symtab.instance(context);
+        jctypes = Types.instance(context);
+        enter = Enter.instance(context);
+        attr = Attr.instance(context);
+        typeMaker = TypeMaker.instance(context);
+        declMaker = DeclarationMaker.instance(context);
+    }
+
+
+    /**
+     * Does a symbol have a given flag?  Forces symbol completion.
+     */
+    public static boolean hasFlag(Symbol sym, long flag) {
+        return (getFlags(sym) & flag) != 0;
+    }
+
+    /**
+     * Returns a symbol's flags.  Forces completion.
+     */
+    public static long getFlags(Symbol sym) {
+        complete(sym);
+        return sym.flags();
+    }
+
+    /**
+     * Completes a symbol, ignoring completion failures.
+     */
+    private static void complete(Symbol sym) {
+        while (true) {
+            try {
+                sym.complete();
+                return;
+            } catch (CompletionFailure e) {
+                // Should never see two in a row, but loop just to be sure.
+            }
+        }
+    }
+}