| /* |
| * Copyright 2006 Google Inc. |
| * |
| * Licensed 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 com.google.gwt.dev.util.msg; |
| |
| import com.google.gwt.core.ext.TreeLogger; |
| |
| import java.io.File; |
| import java.lang.reflect.Method; |
| import java.net.URL; |
| |
| /** |
| * Fast way to produce messages for the logger. Use $N to specify the |
| * replacement argument. Caveats: - N must be a single digit (you shouldn't need |
| * more than 10 args, right?) - '$' cannot be escaped - each arg can only appear |
| * once |
| */ |
| public abstract class Message { |
| |
| private static final Formatter FMT_TOSTRING = new FormatterToString(); |
| private static final Formatter FMT_CLASS = new FormatterForClass(); |
| private static final Formatter FMT_FILE = new FormatterForFile(); |
| private static final Formatter FMT_URL = new FormatterForURL(); |
| private static final Formatter FMT_INTEGER = new FormatterForInteger(); |
| private static final Formatter FMT_LONG = new FormatterForLong(); |
| private static final Formatter FMT_METHOD = new FormatterForMethod(); |
| private static final Formatter FMT_STRING = new FormatterForString(); |
| private static final Formatter FMT_STRING_ARRAY = new FormatterForStringArray(); |
| |
| protected final TreeLogger.Type type; |
| |
| protected final char[][] fmtParts; |
| |
| protected final int[] argIndices; |
| |
| protected final int minChars; |
| |
| /** |
| * Creates a lazily-formatted message. |
| */ |
| protected Message(TreeLogger.Type type, String fmt, int args) { |
| assert (type != null); |
| assert (fmt != null); |
| assert (args >= 0); |
| this.type = type; |
| |
| fmtParts = new char[args + 1][]; |
| argIndices = new int[args]; |
| int from = 0; |
| for (int i = 0; i < args; ++i) { |
| int to = fmt.indexOf('$', from); |
| if (to != -1) { |
| if (to < fmt.length() - 1) { |
| char charDigit = fmt.charAt(to + 1); |
| if (Character.isDigit(charDigit)) { |
| int digit = Character.digit(charDigit, 10); |
| fmtParts[i] = fmt.substring(from, to).toCharArray(); |
| argIndices[i] = digit; |
| from = to + 2; |
| continue; |
| } |
| } |
| } |
| throw new IllegalArgumentException("Expected arg $" + i); |
| } |
| fmtParts[args] = fmt.substring(from).toCharArray(); |
| |
| int minNumChars = 0; |
| for (int i = 0, n = fmtParts.length; i < n; ++i) { |
| minNumChars += fmtParts[i].length; |
| } |
| this.minChars = minNumChars; |
| } |
| |
| /** |
| * @param c a Class |
| * @return a suitable Formatter |
| */ |
| protected final Formatter getFormatter(Class<?> c) { |
| return FMT_CLASS; |
| } |
| |
| /** |
| * @param f a File |
| * @return a suitable Formatter |
| */ |
| protected final Formatter getFormatter(File f) { |
| return FMT_FILE; |
| } |
| |
| /** |
| * @param i an Integer |
| * @return a suitable Formatter |
| */ |
| protected final Formatter getFormatter(Integer i) { |
| return FMT_INTEGER; |
| } |
| |
| /** |
| * @param l a Long |
| * @return a suitable Formatter |
| */ |
| protected Formatter getFormatter(Long l) { |
| return FMT_LONG; |
| } |
| |
| /** |
| * @param m a Method |
| * @return a suitable Formatter |
| */ |
| protected final Formatter getFormatter(Method m) { |
| return FMT_METHOD; |
| } |
| |
| /** |
| * @param s a String |
| * @return a suitable Formatter |
| */ |
| protected final Formatter getFormatter(String s) { |
| return FMT_STRING; |
| } |
| |
| /** |
| * @param sa a String array |
| * @return a suitable Formatter |
| */ |
| protected final Formatter getFormatter(String[] sa) { |
| return FMT_STRING_ARRAY; |
| } |
| |
| /** |
| * @param u a URL |
| * @return a suitable Formatter |
| */ |
| protected final Formatter getFormatter(URL u) { |
| return FMT_URL; |
| } |
| |
| protected final Formatter getToStringFormatter() { |
| return FMT_TOSTRING; |
| } |
| } |