/**
 * $Id: $
 * $Date: $
 *
 */

package org.xmlsh.core;

import java.util.EnumSet;

public class StaticEnvironment {

  private EnumSet<StaticContextFlag> mFlags = EnumSet
      .noneOf(StaticContextFlag.class);
  private static final EnumSet<StaticContextFlag> noFlags = EnumSet
      .noneOf(StaticContextFlag.class);
  private static final StaticEnvironment _defaultEnv = new StaticEnvironment();

  private StaticEnvironment(EnumSet<StaticContextFlag> flags) {
    mFlags = flags;
  }

  private StaticEnvironment() {
    mFlags = noFlags;
  }

  /**
   * @return the tongs
   */
  public boolean getTongs() {
    return mFlags.contains(StaticContextFlag.BLOCK_TONG);
  }

  public static final StaticEnvironment defaultContext() {
    return _defaultEnv;
  }

  public StaticEnvironment addContext(StaticContextFlag flag) {
    StaticEnvironment newEnv = this;
    if(newEnv == _defaultEnv)
      newEnv = new StaticEnvironment(EnumSet.of(flag));
    else
      mFlags.add(flag);
    return newEnv;
  }

}

/*
 * Copyright (C) 2008-2012 David A. Lee.
 * 
 * The contents of this file are subject to the "Simplified BSD License" (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.opensource.org/licenses/bsd-license.php
 * 
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied.
 * See the License for the specific language governing rights and limitations
 * under the License.
 *
 * The Original Code is: all this file.
 *
 * The Initial Developer of the Original Code is David A. Lee
 *
 * Portions created by (your name) are Copyright (C) (your legal entity). All
 * Rights Reserved.
 *
 * Contributor(s): David A. Lee
 * 
 */