de.akra.idocit.java.utils.StringUtils.java Source code

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Here is the source code for de.akra.idocit.java.utils.StringUtils.java

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/*******************************************************************************
 * Copyright 2012 AKRA GmbH
 *
 * 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 de.akra.idocit.java.utils;

import org.apache.commons.lang3.StringEscapeUtils;

import de.akra.idocit.java.services.HTMLTableParser;

public class StringUtils {

    public static final String XML_TAG_TAB = '<' + HTMLTableParser.XML_TAG_TAB + "/>";
    public static final String XML_TAG_BR = '<' + HTMLTableParser.XML_TAG_BR + "/>";

    /**
     * Escapes the special characters in the given string with HTML entities. Tabs and
     * line breaks are replaced with their corresponding HTML entities as well.
     * 
     * @param unescapedText
     *            [SOURCE] The text to escape
     * 
     * @return [OBJECT] The escaped text
     */
    public static String escapeHtml(final String unescapedText) {
        final String escapedText = StringEscapeUtils.escapeHtml4(unescapedText);
        final StringBuilder tmpText = new StringBuilder();

        for (int i = 0; i < escapedText.length(); ++i) {
            switch (escapedText.charAt(i)) {
            case '\t':
                tmpText.append(XML_TAG_TAB);
                break;

            case '\r':
                tmpText.append(XML_TAG_BR);

                // if CR and LF are together, replace it only once
                // Changes due to Issue #2
                if ((escapedText.length() > i + 1) && escapedText.charAt(i + 1) == '\n')
                // End changes due to Issue #2
                {
                    i++;
                }
                break;

            case '\n':
                tmpText.append(XML_TAG_BR);

                // if CR and LF are together, replace it only once
                // Changes due to Issue #2
                if ((escapedText.length() > i + 1) && escapedText.charAt(i + 1) == '\r')
                // End changes due to Issue #2
                {
                    i++;
                }
                break;

            default:
                tmpText.append(escapedText.charAt(i));
                break;
            }
        }

        return tmpText.toString();
    }

    public static String asStringSequence(Object... objects) {
        StringBuffer buffer = new StringBuffer();

        for (Object object : objects) {
            buffer.append(String.valueOf(object));
            buffer.append(',');
        }

        String objectSequence = buffer.toString();

        // Cut the last character, its a comma ;).
        return objectSequence.substring(0, objectSequence.length() - 1);
    }
}