| package com.github.javaparser.utils; |
| |
| import java.io.IOException; |
| import java.io.PrintWriter; |
| import java.io.StringWriter; |
| |
| import static com.github.javaparser.utils.CodeGenerationUtils.f; |
| |
| /** |
| * To avoid dependencies on logging frameworks, we have invented yet another logging framework :-) |
| */ |
| public class Log { |
| /** |
| * This adapter logs to standard out and standard error. |
| */ |
| public static class StandardOutStandardErrorAdapter implements Adapter { |
| @Override |
| public void info(String message) { |
| System.out.println(message); |
| } |
| |
| @Override |
| public void trace(String message) { |
| System.out.println(message); |
| } |
| |
| @Override |
| public void error(Throwable throwable, String message) { |
| if (message == null) { |
| System.err.println(throwable.getMessage()); |
| printStackTrace(throwable); |
| } else if (throwable == null) { |
| System.err.println(message); |
| } else { |
| System.err.println(message + ":" + throwable.getMessage()); |
| printStackTrace(throwable); |
| } |
| } |
| |
| private void printStackTrace(Throwable throwable) { |
| try (StringWriter sw = new StringWriter(); PrintWriter pw = new PrintWriter(sw)) { |
| throwable.printStackTrace(pw); |
| trace(sw.toString()); |
| } catch (IOException e) { |
| throw new AssertionError("Error in logging library"); |
| } |
| } |
| } |
| |
| /** |
| * This adapter logs nothing. |
| */ |
| public static class SilentAdapter implements Adapter { |
| @Override |
| public void info(String message) { |
| } |
| |
| @Override |
| public void trace(String message) { |
| } |
| |
| @Override |
| public void error(Throwable throwable, String f) { |
| } |
| } |
| |
| public interface Adapter { |
| |
| void info(String message); |
| |
| void trace(String message); |
| |
| /** |
| * Both can be null. |
| */ |
| void error(Throwable throwable, String f); |
| } |
| |
| private static Adapter CURRENT_ADAPTER = new SilentAdapter(); |
| |
| /** |
| * Change how logging is handled. You can set your own implementation that forwards to your logging library. |
| */ |
| public static void setAdapter(Adapter adapter) { |
| CURRENT_ADAPTER = adapter; |
| } |
| |
| /** |
| * For logging information that may help solving a problem. |
| */ |
| public static void trace(String format, Object... args) { |
| CURRENT_ADAPTER.trace(f(format, args)); |
| } |
| |
| /** |
| * For logging things that are nice to see scrolling by. |
| */ |
| public static void info(String format, Object... args) { |
| CURRENT_ADAPTER.info(f(format, args)); |
| } |
| |
| /** |
| * For drawing attention to an error. |
| */ |
| public static void error(Throwable throwable) { |
| CURRENT_ADAPTER.error(throwable, null); |
| } |
| |
| /** |
| * For drawing attention to an error that you don't have an exception for. |
| */ |
| public static void error(Throwable throwable, String format, Object... args) { |
| CURRENT_ADAPTER.error(throwable, f(format, args)); |
| } |
| |
| /** |
| * For drawing attention to an error that you don't have an exception for. |
| */ |
| public static void error(String format, Object... args) { |
| CURRENT_ADAPTER.error(null, f(format, args)); |
| } |
| } |