/*
 * JBoss, Home of Professional Open Source
 * Copyright 2005, JBoss Inc., and individual contributors as indicated
 * by the @authors tag. See the copyright.txt 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 GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * 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 GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General 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.jboss.ejb.plugins.cmp.ejbql;

import java.util.List;

import org.jboss.ejb.plugins.cmp.bridge.EntityBridge;
import org.jboss.ejb.plugins.cmp.bridge.FieldBridge;
import org.jboss.ejb.plugins.cmp.bridge.CMPFieldBridge;
import org.jboss.ejb.plugins.cmp.bridge.CMRFieldBridge;

/**
 * This abstract syntax node represents a path declaration.
 *
 * @author <a href="mailto:dain@daingroup.com">Dain Sundstrom</a>
 * @version $Revision: 1.1.4.3 $
 */
public final class ASTPath extends SimpleNode
{
   public List pathList;
   public List fieldList;
   public int type;

   public boolean innerJoin;

   public ASTPath(int id)
   {
      super(id);
   }

   public String getPath()
   {
      return (String) pathList.get(pathList.size() - 1);
   }

   public String getPath(int i)
   {
      return (String) pathList.get(i);
   }

   public FieldBridge getField()
   {
      return (FieldBridge) fieldList.get(fieldList.size() - 1);
   }

   public boolean isCMPField()
   {
      return fieldList.get(fieldList.size() - 1) instanceof CMPFieldBridge;
   }

   public CMPFieldBridge getCMPField()
   {
      return (CMPFieldBridge) fieldList.get(fieldList.size() - 1);
   }

   public boolean isCMRField()
   {
      return fieldList.get(fieldList.size() - 1) instanceof CMRFieldBridge;
   }

   public boolean isCMRField(int i)
   {
      return fieldList.get(i) instanceof CMRFieldBridge;
   }

   public CMRFieldBridge getCMRField()
   {
      return (CMRFieldBridge) fieldList.get(fieldList.size() - 1);
   }

   public CMRFieldBridge getCMRField(int i)
   {
      return (CMRFieldBridge) fieldList.get(i);
   }

   public EntityBridge getEntity()
   {
      Object field = fieldList.get(fieldList.size() - 1);
      if(field instanceof CMRFieldBridge)
      {
         return ((CMRFieldBridge) field).getRelatedEntity();
      }
      else if(field instanceof EntityBridge)
      {
         return (EntityBridge) field;
      }
      else
      {
         return null;
      }
   }

   public EntityBridge getEntity(int i)
   {
      Object field = fieldList.get(i);
      if(field instanceof CMRFieldBridge)
      {
         return ((CMRFieldBridge) field).getRelatedEntity();
      }
      else if(field instanceof EntityBridge)
      {
         return (EntityBridge) field;
      }
      else
      {
         return null;
      }
   }

   public int size()
   {
      return fieldList.size();
   }

   public String toString()
   {
      return pathList.get(pathList.size() - 1) + " <" + type + ">";
   }

   public boolean equals(Object o)
   {
      if(o instanceof ASTPath)
      {
         ASTPath path = (ASTPath) o;
         return path.getPath().equals(getPath());
      }
      return false;
   }

   public int hashCode()
   {
      return getPath().hashCode();
   }

   /**
    * Accept the visitor. *
    */
   public Object jjtAccept(JBossQLParserVisitor visitor, Object data)
   {
      return visitor.visit(this, data);
   }
}
