org.springframework.util.CommonsLogWriter.java Source code

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Here is the source code for org.springframework.util.CommonsLogWriter.java

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/*
 * Copyright 2002-2018 the original author or authors.
 *
 * 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
 *
 *      https://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.springframework.util;

import java.io.Writer;

import org.apache.commons.logging.Log;

/**
 * {@code java.io.Writer} adapter for a Commons Logging {@code Log}.
 *
 * @author Juergen Hoeller
 * @since 2.5.1
 */
public class CommonsLogWriter extends Writer {

    private final Log logger;

    private final StringBuilder buffer = new StringBuilder();

    /**
     * Create a new CommonsLogWriter for the given Commons Logging logger.
     * @param logger the Commons Logging logger to write to
     */
    public CommonsLogWriter(Log logger) {
        Assert.notNull(logger, "Logger must not be null");
        this.logger = logger;
    }

    public void write(char ch) {
        if (ch == '\n' && this.buffer.length() > 0) {
            logger.debug(this.buffer.toString());
            this.buffer.setLength(0);
        } else {
            this.buffer.append(ch);
        }
    }

    @Override
    public void write(char[] buffer, int offset, int length) {
        for (int i = 0; i < length; i++) {
            char ch = buffer[offset + i];
            if (ch == '\n' && this.buffer.length() > 0) {
                logger.debug(this.buffer.toString());
                this.buffer.setLength(0);
            } else {
                this.buffer.append(ch);
            }
        }
    }

    @Override
    public void flush() {
    }

    @Override
    public void close() {
    }

}