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The AceQL Java Client JDBC Driver allows to wrap the AceQL HTTP APIs and eliminates the tedious works of handling communications errors and parsing JSON results. Android and Java Desktop application developers can access remote SQL databases and/or SQL databases in the cloud by simply including standard JDBC calls in their code, just like they would for a local database.

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/*
 * This file is part of AceQL JDBC Driver.
 * AceQL JDBC Driver: Remote JDBC access over HTTP with AceQL HTTP.
 * Copyright (c) 2023,  KawanSoft SAS
 * (http://www.kawansoft.com). All rights reserved.
 *
 * 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 com.aceql.jdbc.commons.main.util.framework;

import java.util.List;
import java.util.Vector;

import org.apache.commons.lang3.StringEscapeUtils;
import org.apache.commons.lang3.text.translate.NumericEntityEscaper;

/**
 * Static methods to convert special characters to HTML equivalent and
 * vice-versa.
 *
 * @author Nicolas de Pomereu
 *
 */

@SuppressWarnings("deprecation")
public class HtmlConverter {

    private static boolean DO_NOTHING = false;

    /**
     *
     * Converts special HTML values of characters to their original values. 

     * Example : "&eacute;""is converted to "�"
     * 
     *
     * @param string
     *            A String to convert from HTML to original
     *            

     * @return A String of char converted to original values
     *
     */

    public static String fromHtml(String string) {

	if (DO_NOTHING) {
	    return string;
	}

	if (string == null) {
	    return string;
	}

	if (string.contains("&")) {
	    return StringEscapeUtils.unescapeHtml4(string);
	} else {
	    return string;
	}

    }

    /**
     * Converts special characters to their HTML values. 

     * Example : "?" is converted to "&eacute;"
     * 

     *
     * @param string
     *            A String to convert from original to HTML
     *            

     * @return A String of char converted to HTML equivalent.
     *
     */

    public static String toHtml(final String string) {

	if (DO_NOTHING) {
	    return string;
	}

	String stringNew = StringEscapeUtils.ESCAPE_HTML4
		.with(NumericEntityEscaper.between(0x7f, Integer.MAX_VALUE))
		.translate(string);

	if (stringNew != null) {
	    stringNew = stringNew.replaceAll("&", "&"); // To keep same result if
						      // multi-call
	}

	return string;
    }

    /**
     *
     * Converts special HTML values of characters to their original values. 

     * Example : "é"is converted to "?"
     * 

     *
     * @param list
     *            A list of String to convert from HTML to original
     *            

     * @return A list of String char converted to original values
     *
     */

    public static List fromHtml(List list) {

	List newList = new Vector();

	for (String string : list) {
	    string = HtmlConverter.fromHtml(string);
	    newList.add(string);
	}

	return newList;
    }

    /**
     * Converts special characters to their HTML values. 

     * Example : "�" is converted to "é"
     * 

     *
     * @param list
     *            A list of String to convert from original to HTML
     *            
     * @return A list of String of char converted to HTML equivalent.
     *
     */

    public static List toHtml(List list) {

	List newList = new Vector();

	for (String string : list) {
	    string = HtmlConverter.toHtml(string);
	    newList.add(string);
	}

	return newList;
    }

}