StringReplacer.java

package com.formulasearchengine.mathosphere.mlp.text;

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

public class StringReplacer {
  public static String replace(String input, Pattern regex, StringReplacerCallback callback) {
    StringBuffer resultString = new StringBuffer();
    Matcher regexMatcher = regex.matcher(input);
    while (regexMatcher.find()) {
      regexMatcher.appendReplacement(resultString, callback.replace(regexMatcher));
    }
    regexMatcher.appendTail(resultString);

    return resultString.toString();
  }
}