/*
 * IronJacamar, a Java EE Connector Architecture implementation
 * Copyright 2015, Red Hat Inc, and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the Eclipse Public License 1.0 as
 * published by the Free Software Foundation.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the Eclipse
 * Public License for more details.
 *
 * You should have received a copy of the Eclipse Public License 
 * along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.ironjacamar.common.metadata.common;

import org.ironjacamar.common.api.metadata.JCAMetadata;

import java.util.Map;

/**
 * An abstract metadata node
 *
 * @author <a href="jesper.pedersen@ironjacamar.org">Jesper Pedersen</a>
 */
public abstract class AbstractMetadata implements JCAMetadata
{
   /** serial version  */
   private static final long serialVersionUID = 7676001197081795547L;
   /** The key -> value map */
   private Map<String, String> m;

   /**
    * Constructor
    * @param m The map
    */
   public AbstractMetadata(Map<String, String> m)
   {
      this.m = m;
   }

   /**
    * {@inheritDoc}
    */
   public boolean hasExpression(String key)
   {
      if (m == null)
         return false;
      
      return m.containsKey(key);
   }

   /**
    * {@inheritDoc}
    */
   public String getValue(String key, String v)
   {
      return getValue(key, null, v);
   }

   /**
    * {@inheritDoc}
    */
   public String getValue(String key, String subkey, String v)
   {
      if (m == null)
         return v;
      return StringUtils.restoreExpression(m, key, subkey, v);
   }
}