rzo1 commented on code in PR #492: URL: https://github.com/apache/opennlp/pull/492#discussion_r1110997598
########## opennlp-tools/src/main/java/opennlp/tools/log/LogPrintStream.java: ########## @@ -0,0 +1,87 @@ +/* + * 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 opennlp.tools.log; + +import java.io.PrintStream; +import java.util.Objects; + +import org.slf4j.Logger; +import org.slf4j.event.Level; + +import opennlp.tools.commons.Internal; + +/** + * This class serves as an adapter for a {@link Logger} used withing a {@link PrintStream}. + */ +@Internal +public class LogPrintStream extends PrintStream { + + private final Logger logger; + private final Level level; + + /** + * Creates a {@link LogPrintStream} for the given {@link Logger} + * + * @param logger must not be {@code null} + */ + public LogPrintStream(Logger logger) { + this(logger, Level.INFO); + } + + /** + * Creates a {@link LogPrintStream} for the given {@link Logger}, which logs at the specified + * {@link Level level}. + * + * @param logger must not be {@code null} + * @param level must not be {@code null} + */ + public LogPrintStream(Logger logger, Level level) { + super(nullOutputStream()); + Objects.requireNonNull(logger, "logger must not be NULL."); + Objects.requireNonNull(level, "log level must not be NULL."); + this.logger = logger; + this.level = level; + } + + @Override + public PrintStream printf(String format, Object... args) { + log(String.format(format, args)); + return this; + } + + @Override + public void println(String msg) { + log(msg); + } + + private void log(String msg) { + switch (level) { + case TRACE: + logger.trace(msg); + case DEBUG: + logger.debug(msg); + case INFO: + logger.info(msg); + case WARN: + logger.warn(msg); + case ERROR: + logger.error(msg); + } Review Comment: Looked into the interface but it seems, that slf4j doesn't have it -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: dev-unsubscr...@opennlp.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
