Escape JavaScript literal strings (assumes they are surrounded by double quotes, not single quotes). - Java Scripting

Java examples for Scripting:Javascript

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Description

Escape JavaScript literal strings (assumes they are surrounded by double quotes, not single quotes).

Demo Code

/**// w  w  w.  ja v  a2  s .  com
 * Copyright 2010-2013 Three Crickets LLC.
 * <p>
 * The contents of this file are subject to the terms of the Mozilla Public
 * License version 1.1: http://www.mozilla.org/MPL/MPL-1.1.html
 * <p>
 * Alternatively, you can obtain a royalty free commercial license with less
 * limitations, transferable or non-transferable, directly from Three Crickets
 * at http://threecrickets.com/
 */
//package com.java2s;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
    private static Pattern[] ESCAPE_PATTERNS = new Pattern[] {
            Pattern.compile("\\\\"), Pattern.compile("\\n"),
            Pattern.compile("\\r"), Pattern.compile("\\t"),
            Pattern.compile("\\f"), Pattern.compile("\\\"") };
    private static String[] ESCAPE_REPLACEMENTS = new String[] {
            Matcher.quoteReplacement("\\\\"),
            Matcher.quoteReplacement("\\n"),
            Matcher.quoteReplacement("\\r"),
            Matcher.quoteReplacement("\\t"),
            Matcher.quoteReplacement("\\f"),
            Matcher.quoteReplacement("\\\"") };

    /**
     * Escape JavaScript literal strings (assumes they are surrounded by double
     * quotes, not single quotes).
     * 
     * @param string
     *        The string
     * @return The literal string
     */
    public static String escape(String string) {
        for (int i = 0, length = ESCAPE_PATTERNS.length; i < length; i++)
            string = ESCAPE_PATTERNS[i].matcher(string).replaceAll(
                    ESCAPE_REPLACEMENTS[i]);
        return string;
    }
}

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