Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import java.util.HashMap;

import java.util.Map;

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

public class Main {
    public static final String XML_ENTITY_NAMED_GROUP = "name";
    public static final String XML_ENTITY_RE = "\\&(?<" + XML_ENTITY_NAMED_GROUP + ">[#\\w\\d]*?);";

    /**
     * This function will return a map that contains entity names as keys, and random integer strings as values. The values are guaranteed not to have appeared
     * in the original xml.
     * 
     * @param xml
     *            The xml to generate the replacements for
     * @return a map of entity names to unique random strings
     */
    private static Map<String, String> calculateEntityReplacements(final String xml) {
        final Map<String, String> retValue = new HashMap<String, String>();

        final Random randomGenerator = new Random();

        /* compile the regular expression */
        final Pattern injectionSequencePattern = Pattern.compile(XML_ENTITY_RE);
        /* find any matches */
        final Matcher injectionSequencematcher = injectionSequencePattern.matcher(xml);

        /* loop over the regular expression matches */
        while (injectionSequencematcher.find()) {
            final String entityName = injectionSequencematcher.group(XML_ENTITY_NAMED_GROUP);

            if (!retValue.containsKey(entityName)) {
                String randomReplacement;
                do {
                    randomReplacement = "[" + randomGenerator.nextInt() + "]";
                } while (xml.indexOf(randomReplacement) != -1);

                retValue.put(entityName, randomReplacement);
            }
        }

        return retValue;
    }
}