/*

   Derby - Class org.apache.derby.impl.sql.compile.GrantNode

   Licensed to the Apache Software Foundation (ASF) under one or more
   contributor license agreements.  See the NOTICE file distributed with
   this work for additional information regarding copyright ownership.
   The ASF licenses this file to you 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.apache.derby.impl.sql.compile;

import org.apache.derby.iapi.sql.execute.ConstantAction;
import org.apache.derby.impl.sql.execute.PrivilegeInfo;
import org.apache.derby.iapi.services.sanity.SanityManager;
import org.apache.derby.iapi.error.StandardException;

import java.util.HashMap;
import java.util.Iterator;
import java.util.List;

/**
 * This class represents a GRANT statement.
 */
public class GrantNode extends DDLStatementNode
{
	private PrivilegeNode privileges;
	private List grantees;

	/**
	 * Convert this object to a String.  See comments in QueryTreeNode.java
	 * for how this should be done for tree printing.
	 *
	 * @return	This object as a String
	 */

	public String toString()
	{
		if (SanityManager.DEBUG)
		{
			StringBuffer sb = new StringBuffer();
			for( Iterator it = grantees.iterator(); it.hasNext();)
			{
				if( sb.length() > 0)
					sb.append( ",");
				sb.append( it.next().toString());
			}
			return super.toString() +
				   privileges.toString() +
				   "TO: \n" + sb.toString() + "\n";
		}
		else
		{
			return "";
		}
	} // end of toString

	public String statementToString()
	{
		return "GRANT";
	}

	
	/**
	 * Initialize a GrantNode.
	 *
	 * @param privileges PrivilegesNode
	 * @param grantees List
	 */
	public void init( Object privileges,
					  Object grantees)
	{
		this.privileges = (PrivilegeNode) privileges;
		this.grantees = (List) grantees;
	}

	/**
	 * Bind this GrantNode. Resolve all table, column, and routine references.
	 *
	 *
	 * @exception StandardException	Standard error policy.
	 */
	public void bindStatement() throws StandardException
	{
		privileges = (PrivilegeNode) privileges.bind( new HashMap(), grantees, true);
	} // end of bind


	/**
	 * Create the Constant information that will drive the guts of Execution.
	 *
	 * @exception StandardException	Standard error policy.
	 */
	public ConstantAction makeConstantAction() throws StandardException
	{
		return getGenericConstantActionFactory().getGrantConstantAction( privileges.makePrivilegeInfo(),
																		 grantees);
	}
}
