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/*
* Copyright 2014 - 2018 Rafael Winterhalter
*
* 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 net.bytebuddy.build;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
* An API that can be implemented by logging build systems to allow plugins to log information without depending on
* a build system-specific logging API.
*/
public interface BuildLogger {
/**
* Returns {@code true} if the debug log level is enabled.
*
* @return {@code true} if the debug log level is enabled.
*/
boolean isDebugEnabled();
/**
* Logs a message on the debug level.
*
* @param message The message to log.
*/
void debug(String message);
/**
* Logs a message on the debug level.
*
* @param message The message to log.
* @param throwable A throwable that is attached to the message.
*/
void debug(String message, Throwable throwable);
/**
* Returns {@code true} if the info log level is enabled.
*
* @return {@code true} if the info log level is enabled.
*/
boolean isInfoEnabled();
/**
* Logs a message on the info level.
*
* @param message The message to log.
*/
void info(String message);
/**
* Logs a message on the info level.
*
* @param message The message to log.
* @param throwable A throwable that is attached to the message.
*/
void info(String message, Throwable throwable);
/**
* Returns {@code true} if the warn log level is enabled.
*
* @return {@code true} if the warn log level is enabled.
*/
boolean isWarnEnabled();
/**
* Logs a message on the warn level.
*
* @param message The message to log.
*/
void warn(String message);
/**
* Logs a message on the warn level.
*
* @param message The message to log.
* @param throwable A throwable that is attached to the message.
*/
void warn(String message, Throwable throwable);
/**
* Returns {@code true} if the error log level is enabled.
*
* @return {@code true} if the error log level is enabled.
*/
boolean isErrorEnabled();
/**
* Logs a message on the error level.
*
* @param message The message to log.
*/
void error(String message);
/**
* Logs a message on the error level.
*
* @param message The message to log.
* @param throwable A throwable that is attached to the message.
*/
void error(String message, Throwable throwable);
/**
* A non-operational build logger that discards all statements.
*/
enum NoOp implements BuildLogger {
/**
* The singleton instance.
*/
INSTANCE;
/**
* {@inheritDoc}
*/
public boolean isDebugEnabled() {
return false;
}
/**
* {@inheritDoc}
*/
public void debug(String message) {
/* empty */
}
/**
* {@inheritDoc}
*/
public void debug(String message, Throwable throwable) {
/* empty */
}
/**
* {@inheritDoc}
*/
public boolean isInfoEnabled() {
return false;
}
/**
* {@inheritDoc}
*/
public void info(String message) {
/* empty */
}
/**
* {@inheritDoc}
*/
public void info(String message, Throwable throwable) {
/* empty */
}
/**
* {@inheritDoc}
*/
public boolean isWarnEnabled() {
return false;
}
/**
* {@inheritDoc}
*/
public void warn(String message) {
/* empty */
}
/**
* {@inheritDoc}
*/
public void warn(String message, Throwable throwable) {
/* empty */
}
/**
* {@inheritDoc}
*/
public boolean isErrorEnabled() {
return false;
}
/**
* {@inheritDoc}
*/
public void error(String message) {
/* empty */
}
/**
* {@inheritDoc}
*/
public void error(String message, Throwable throwable) {
/* empty */
}
}
/**
* An abstract adapter implementation for a build logger.
*/
abstract class Adapter implements BuildLogger {
/**
* {@inheritDoc}
*/
public boolean isDebugEnabled() {
return false;
}
/**
* {@inheritDoc}
*/
public void debug(String message) {
/* empty */
}
/**
* {@inheritDoc}
*/
public void debug(String message, Throwable throwable) {
/* empty */
}
/**
* {@inheritDoc}
*/
public boolean isInfoEnabled() {
return false;
}
/**
* {@inheritDoc}
*/
public void info(String message) {
/* empty */
}
/**
* {@inheritDoc}
*/
public void info(String message, Throwable throwable) {
/* empty */
}
/**
* {@inheritDoc}
*/
public boolean isWarnEnabled() {
return false;
}
/**
* {@inheritDoc}
*/
public void warn(String message) {
/* empty */
}
/**
* {@inheritDoc}
*/
public void warn(String message, Throwable throwable) {
/* empty */
}
/**
* {@inheritDoc}
*/
public boolean isErrorEnabled() {
return false;
}
/**
* {@inheritDoc}
*/
public void error(String message) {
/* empty */
}
/**
* {@inheritDoc}
*/
public void error(String message, Throwable throwable) {
/* empty */
}
}
/**
* A build logger that writes all statements to a {@link PrintStream}.
*/
@HashCodeAndEqualsPlugin.Enhance
class StreamWriting implements BuildLogger {
/**
* The target for writing statements.
*/
private final PrintStream printStream;
/**
* Creates a new stream writing build logger.
*
* @param printStream The target for writing statements.
*/
public StreamWriting(PrintStream printStream) {
this.printStream = printStream;
}
/**
* Creates a build logger that writes to {@link System#out}.
*
* @return A build logger that writes to {@link System#out}.
*/
public static BuildLogger toSystemOut() {
return new StreamWriting(System.out);
}
/**
* Creates a build logger that writes to {@link System#err}.
*
* @return A build logger that writes to {@link System#err}.
*/
public static BuildLogger toSystemError() {
return new StreamWriting(System.err);
}
/**
* {@inheritDoc}
*/
public boolean isDebugEnabled() {
return true;
}
/**
* {@inheritDoc}
*/
public void debug(String message) {
printStream.print(message);
}
/**
* {@inheritDoc}
*/
public void debug(String message, Throwable throwable) {
synchronized (printStream) {
printStream.print(message);
throwable.printStackTrace(printStream);
}
}
/**
* {@inheritDoc}
*/
public boolean isInfoEnabled() {
return true;
}
/**
* {@inheritDoc}
*/
public void info(String message) {
printStream.print(message);
}
/**
* {@inheritDoc}
*/
public void info(String message, Throwable throwable) {
synchronized (printStream) {
printStream.print(message);
throwable.printStackTrace(printStream);
}
}
/**
* {@inheritDoc}
*/
public boolean isWarnEnabled() {
return true;
}
/**
* {@inheritDoc}
*/
public void warn(String message) {
printStream.print(message);
}
/**
* {@inheritDoc}
*/
public void warn(String message, Throwable throwable) {
synchronized (printStream) {
printStream.print(message);
throwable.printStackTrace(printStream);
}
}
/**
* {@inheritDoc}
*/
public boolean isErrorEnabled() {
return true;
}
/**
* {@inheritDoc}
*/
public void error(String message) {
printStream.print(message);
}
/**
* {@inheritDoc}
*/
public void error(String message, Throwable throwable) {
synchronized (printStream) {
printStream.print(message);
throwable.printStackTrace(printStream);
}
}
}
/**
* A compound build logger.
*/
@HashCodeAndEqualsPlugin.Enhance
class Compound implements BuildLogger {
/**
* The build loggers to delegate to.
*/
private final List buildLoggers;
/**
* Creates a new compound build logger.
*
* @param buildLogger The build loggers to delegate to.
*/
public Compound(BuildLogger... buildLogger) {
this(Arrays.asList(buildLogger));
}
/**
* Creates a new compound build logger.
*
* @param buildLoggers The build loggers to delegate to.
*/
public Compound(List buildLoggers) {
this.buildLoggers = new ArrayList();
for (BuildLogger buildLogger : buildLoggers) {
if (buildLogger instanceof Compound) {
this.buildLoggers.addAll(((Compound) buildLogger).buildLoggers);
} else if (!(buildLogger instanceof NoOp)) {
this.buildLoggers.add(buildLogger);
}
}
}
/**
* {@inheritDoc}
*/
public boolean isDebugEnabled() {
for (BuildLogger buildLogger : buildLoggers) {
if (buildLogger.isDebugEnabled()) {
return true;
}
}
return false;
}
/**
* {@inheritDoc}
*/
public void debug(String message) {
for (BuildLogger buildLogger : buildLoggers) {
if (buildLogger.isDebugEnabled()) {
buildLogger.debug(message);
}
}
}
/**
* {@inheritDoc}
*/
public void debug(String message, Throwable throwable) {
for (BuildLogger buildLogger : buildLoggers) {
if (buildLogger.isDebugEnabled()) {
buildLogger.debug(message, throwable);
}
}
}
/**
* {@inheritDoc}
*/
public boolean isInfoEnabled() {
for (BuildLogger buildLogger : buildLoggers) {
if (buildLogger.isInfoEnabled()) {
return true;
}
}
return false;
}
/**
* {@inheritDoc}
*/
public void info(String message) {
for (BuildLogger buildLogger : buildLoggers) {
if (buildLogger.isInfoEnabled()) {
buildLogger.info(message);
}
}
}
/**
* {@inheritDoc}
*/
public void info(String message, Throwable throwable) {
for (BuildLogger buildLogger : buildLoggers) {
if (buildLogger.isInfoEnabled()) {
buildLogger.info(message, throwable);
}
}
}
/**
* {@inheritDoc}
*/
public boolean isWarnEnabled() {
for (BuildLogger buildLogger : buildLoggers) {
if (buildLogger.isWarnEnabled()) {
return true;
}
}
return false;
}
/**
* {@inheritDoc}
*/
public void warn(String message) {
for (BuildLogger buildLogger : buildLoggers) {
if (buildLogger.isWarnEnabled()) {
buildLogger.warn(message);
}
}
}
/**
* {@inheritDoc}
*/
public void warn(String message, Throwable throwable) {
for (BuildLogger buildLogger : buildLoggers) {
if (buildLogger.isWarnEnabled()) {
buildLogger.warn(message, throwable);
}
}
}
/**
* {@inheritDoc}
*/
public boolean isErrorEnabled() {
for (BuildLogger buildLogger : buildLoggers) {
if (buildLogger.isErrorEnabled()) {
return true;
}
}
return false;
}
/**
* {@inheritDoc}
*/
public void error(String message) {
for (BuildLogger buildLogger : buildLoggers) {
if (buildLogger.isErrorEnabled()) {
buildLogger.error(message);
}
}
}
/**
* {@inheritDoc}
*/
public void error(String message, Throwable throwable) {
for (BuildLogger buildLogger : buildLoggers) {
if (buildLogger.isErrorEnabled()) {
buildLogger.error(message, throwable);
}
}
}
}
}
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