1 /* 2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package org.graalvm.compiler.debug.internal; 24 25 import java.util.ArrayList; 26 import java.util.Collections; 27 import java.util.HashMap; 28 import java.util.List; 29 import java.util.Map; 30 31 /** 32 * Registry for allocating a globally unique integer id to each {@link DebugValue}. 33 */ 34 public class KeyRegistry { 35 36 private static final Map<String, Integer> keyMap = new HashMap<>(); 37 private static final List<DebugValue> debugValues = new ArrayList<>(); 38 39 /** 40 * Ensures a given debug value is registered. 41 * 42 * @return the globally unique id for {@code value} 43 */ 44 public static synchronized int register(DebugValue value) { 45 String name = value.getName(); 46 if (!keyMap.containsKey(name)) { 47 keyMap.put(name, debugValues.size()); 48 debugValues.add(value); 49 } 50 return keyMap.get(name); 51 } 52 53 /** 54 * Gets a immutable view of the registered debug values. 55 * 56 * @return a list where {@code get(i).getIndex() == i} 57 */ 58 public static synchronized List<DebugValue> getDebugValues() { 59 return Collections.unmodifiableList(debugValues); 60 } 61 }