org.millr.slick.utils.TrimString.java Source code

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Here is the source code for org.millr.slick.utils.TrimString.java

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/*
 * Copyright 2016 Chris Millar
 * 
 * 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 org.millr.slick.utils;

import static org.apache.commons.lang.StringEscapeUtils.escapeHtml;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Trim String Utility
 * Receive a string and trim it to a desired length. Remove basic HTML if needed.
 */
public class TrimString {

    public String trimmedString;

    private static final Logger LOGGER = LoggerFactory.getLogger(TrimString.class);

    public TrimString(String input, int length, boolean soft) {

        LOGGER.info(">>>> Trimming String");

        // Replace basic HTML. Will break if HTML is malformed.
        String contentString = input.replaceAll("<[^>]*>", "");

        if (contentString == null || contentString.trim().isEmpty()) {
            LOGGER.info("String is empty");
            trimmedString = contentString;
        }

        try {
            StringBuffer sb = new StringBuffer(contentString);

            int desiredLength = length;
            int endIndex = sb.indexOf(" ", desiredLength);

            //If soft, remove three characters to make room for elipsis.
            if (soft) {
                desiredLength = length - 3;
                endIndex = sb.indexOf(" ", desiredLength);
                contentString = escapeHtml(sb.insert(endIndex, "...").substring(0, endIndex + 3));
            } else {
                contentString = escapeHtml(sb.substring(0, endIndex));
            }
        } catch (Exception e) {
            LOGGER.error("Exception: " + e.getMessage(), e);
        }
        trimmedString = contentString;
    }
}