net.mikaboshi.intra_mart.tools.log_stats.util.LogStringUtil.java Source code

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Here is the source code for net.mikaboshi.intra_mart.tools.log_stats.util.LogStringUtil.java

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/*
 * 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.mikaboshi.intra_mart.tools.log_stats.util;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.commons.lang.StringUtils;

/**
 * ??
 *
 * @version 1.0.9
 * @author <a href="https://github.com/cwan">cwan</a>
 */
public final class LogStringUtil {

    private static final Pattern LINE_SPLIT_PATTERN = Pattern.compile("\\r?\\n");

    private static final String[] ENPTY_STRING_ARRAY = new String[0];

    private static final Pattern TRUNCATE_URL_PATTERN = Pattern
            .compile("(?:[^(\\:/)]+\\:)?//(?:[^(\\:/)]+)(?:\\:\\d+)?(/.+)");

    private LogStringUtil() {
    }

    /**
     * ??
     *
     * @param s
     * @return ?????null???????
     */
    public static String[] lines(CharSequence s) {

        if (s == null) {
            return ENPTY_STRING_ARRAY;
        }

        return LINE_SPLIT_PATTERN.split(s);
    }

    /**
     * URL?????
     * @param url
     * @return
     */
    public static String truncateUrl(String url) {

        if (url == null) {
            return StringUtils.EMPTY;
        }

        Matcher matcher = TRUNCATE_URL_PATTERN.matcher(url);

        if (matcher.matches()) {
            return matcher.group(1);
        } else {
            return url;
        }
    }

}