Generate a faster string comparison than String.equals() for web mode code. : Utility « GWT « Java

Generate a faster string comparison than String.equals() for web mode code.

 * Copyright 2009 Sysmap Solutions Software e Consultoria Ltda.
 * 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
 * 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.

 * @author Gesse S. F. Dafe
 * @author Thiago da Rosa de Bustamante -
public class Util{
   * This method generates a faster string comparison than {@code String.equals()}
   * for web mode code.
   * The GWT generated {@code String.equals()} method makes a check in its parameter's type in runtime. 
   * That method makes that assertion on compilation time (once its parameters are both 
   * Strings).
   * @param a
   * @param b
   * @return
  public static boolean equals(String a, String b)
    if (GWT.isScript())
      if (a==null) return (b==null);
      return (b!= null && a==b);
      if (a==null) return (b==null);
      return (b!= null && a.equals(b));


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