| /* |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| package org.apache.royale.compiler.internal.common; |
| |
| import java.util.Arrays; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| /** |
| * A singleton class that counts the number of various objects (such as tokens, |
| * nodes, definitions, and scopes) created during a compilation. |
| * <p> |
| * You should not expect the counts to be exactly reproducible when doing the |
| * same compilation multiple times. Some objects may get garbage collected |
| * and recreated. |
| */ |
| public class Counter |
| { |
| /** |
| * Flag that enables counting of instances of TokenBase. |
| */ |
| public static final boolean COUNT_TOKENS = false; |
| |
| /** |
| * Flag that enables counting of instances of NodeBase. |
| */ |
| public static final boolean COUNT_NODES = false; |
| |
| /** |
| * Flag that enables counting of instances of DefinitionBase. |
| */ |
| public static final boolean COUNT_DEFINITIONS = false; |
| |
| /** |
| * Flag that enables counting of instances of ASScopeBase. |
| */ |
| public static final boolean COUNT_SCOPES = false; |
| |
| /** |
| * Gets the singleton instance of this class. |
| */ |
| public static Counter getInstance() |
| { |
| return instance; |
| } |
| |
| // Storage for the singleton instance. |
| private static Counter instance = new Counter(); |
| |
| // Private constructor. |
| private Counter() |
| { |
| reset(); |
| } |
| |
| // Storage for various named counts. |
| private Map<String, Integer> map; |
| |
| /** |
| * Resets the counter so that there are no named counts. |
| */ |
| public synchronized void reset() |
| { |
| map = new HashMap<String, Integer>(); |
| } |
| |
| /** |
| * Increments the count with the specified name. |
| */ |
| public synchronized boolean incrementCount(String name) |
| { |
| Integer n = map.get(name); |
| if (n == null) |
| n = 0; |
| n++; |
| map.put(name, n); |
| return true; |
| } |
| |
| /** |
| * Decrements the count with the specified name. |
| * A count is not allowed to go negative. |
| */ |
| public synchronized boolean decrementCount(String name) |
| { |
| Integer n = map.get(name); |
| if (n == null) |
| n = 0; |
| n--; |
| if (n < 0) |
| n = 0; |
| map.put(name, n); |
| return true; |
| } |
| |
| /** |
| * Gets the count with the specified name. |
| */ |
| public int getCount(String name) |
| { |
| Integer n = map.get(name); |
| return n != null ? n : 0; |
| } |
| |
| /** |
| * Dumps all counts in alphabetical order to System.out. |
| */ |
| public void dumpCounts() |
| { |
| if (map.isEmpty()) |
| return; |
| |
| String[] keys = map.keySet().toArray(new String[0]); |
| Arrays.sort(keys); |
| |
| for (String key : keys) |
| { |
| System.out.println(getCount(key) + "\t" + key); |
| } |
| } |
| } |