| /* |
| * Copyright 1999,2004 The Apache Software Foundation. |
| * |
| * 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 org.apache.log4j.chainsaw.layout; |
| |
| import java.io.BufferedReader; |
| import java.io.InputStreamReader; |
| import java.net.URL; |
| |
| import org.apache.log4j.LogManager; |
| import org.apache.log4j.PatternLayout; |
| |
| |
| /** |
| * Factory class to load and cache Layout information from resources. |
| * |
| * @author Paul Smith <psmith@apache.org> |
| */ |
| public class DefaultLayoutFactory { |
| private volatile static String defaultPatternLayout = null; |
| |
| private DefaultLayoutFactory() { |
| } |
| |
| public static String getDefaultPatternLayout() { |
| if (defaultPatternLayout == null) { |
| StringBuffer content = new StringBuffer(); |
| URL defaultLayoutURL = |
| DefaultLayoutFactory.class.getClassLoader().getResource( |
| "org/apache/log4j/chainsaw/layout/DefaultDetailLayout.html"); |
| |
| if (defaultLayoutURL == null) { |
| LogManager.getLogger(DefaultLayoutFactory.class).warn( |
| "Could not locate the default Layout for Event Details and Tooltips"); |
| } else { |
| try { |
| BufferedReader reader = null; |
| |
| try { |
| reader = |
| new BufferedReader( |
| new InputStreamReader(defaultLayoutURL.openStream())); |
| |
| String line = ""; |
| |
| while ((line = reader.readLine()) != null) { |
| content.append(line).append("\n"); |
| } |
| } finally { |
| if (reader != null) { |
| reader.close(); |
| } |
| } |
| } catch (Exception e) { |
| content = new StringBuffer(PatternLayout.TTCC_CONVERSION_PATTERN); |
| } |
| |
| defaultPatternLayout = content.toString(); |
| } |
| } |
| |
| return defaultPatternLayout; |
| } |
| } |