StringUtil.java

/**
 * Copyright 2008 Google Inc.
 *
 * 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 org.waveprotocol.wave.client.common.util;

/**
 * String functions.
 *
 */
public class StringUtil {

  /**
   * @param xml
   * @return XML-escaped string
   */
  public static String xmlEscape(String xml) {
    return xml
        .replaceAll("&", "&")
        .replaceAll("<", "<")
        .replaceAll(">", ">");
  }

  /**
   * Notice that this function only escape entity reference and not character reference.
   * @param xml
   * @return the unescaped xml string.
   */
  public static String xmlUnescape(String xml) {
    return  xml
        .replaceAll("<", "<")
        .replaceAll(">", ">")
        .replaceAll(""", "\"")
        .replaceAll("'", "'")
        .replaceAll("&", "&");
  }
}