java/engine/org/apache/derby/impl/sql/CursorTableReference.java

/*

   Derby - Class org.apache.derby.impl.sql.CursorTableReference

   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;

import org.apache.derby.iapi.sql.execute.ExecCursorTableReference;
import org.apache.derby.shared.common.sanity.SanityManager;

import org.apache.derby.iapi.services.io.StoredFormatIds;
import org.apache.derby.iapi.services.io.FormatIdUtil;
import org.apache.derby.iapi.services.io.Formatable;

import java.io.ObjectOutput;
import java.io.ObjectInput;
import java.io.IOException;
/**
 * 
 */
public class CursorTableReference
	implements ExecCursorTableReference, Formatable
{

	/********************************************************
	**
	**	This class implements Formatable. That means that it
	**	can write itself to and from a formatted stream. If
	**	you add more fields to this class, make sure that you
	**	also write/read them with the writeExternal()/readExternal()
	**	methods.
	**
	**	If, inbetween releases, you add more fields to this class,
	**	then you should bump the version number emitted by the getTypeFormatId()
	**	method.
	**
	********************************************************/

	private String		exposedName;
	private String		baseName;
	private String		schemaName;

	/**
	 * Niladic constructor for Formatable
	 */
	public CursorTableReference()
	{
	}

	/**
	 *
	 */
	public CursorTableReference
	(
		String	exposedName,
		String	baseName,
		String	schemaName
	)
	{
		this.exposedName = exposedName;
		this.baseName = baseName;
		this.schemaName = schemaName;
	}

	/**
	 * Return the base name of the table
 	 *
	 * @return the base name
	 */
	public String getBaseName()
	{
		return baseName;
	}

	/**
	 * Return the exposed name of the table.  Exposed
	 * name is another term for correlation name.  If
	 * there is no correlation, this will return the base
	 * name.
 	 *
	 * @return the base name
	 */
	public String getExposedName()
	{
		return exposedName;
	}

	/**
	 * Return the schema for the table.  
	 *
	 * @return the schema name
	 */
	public String getSchemaName()
	{
		return schemaName;
	}

	//////////////////////////////////////////////
	//
	// FORMATABLE
	//
	//////////////////////////////////////////////
	/**
	 * Write this object out
	 *
	 * @param out write bytes here
	 *
 	 * @exception IOException thrown on error
	 */
	public void writeExternal(ObjectOutput out) throws IOException
	{
		out.writeObject(baseName);
		out.writeObject(exposedName);
		out.writeObject(schemaName);
	}

	/**
	 * Read this object from a stream of stored objects.
	 *
	 * @param in read this.
	 *
	 * @exception IOException					thrown on error
	 * @exception ClassNotFoundException		thrown on error
	 */
	public void readExternal(ObjectInput in)
		throws IOException, ClassNotFoundException
	{
		baseName = (String)in.readObject();
		exposedName = (String)in.readObject();
		schemaName = (String)in.readObject();
	}
	
	/**
	 * Get the formatID which corresponds to this class.
	 *
	 *	@return	the formatID of this class
	 */
	public	int getTypeFormatId()	{ return StoredFormatIds.CURSOR_TABLE_REFERENCE_V01_ID; }

	public String toString()
	{
		if (SanityManager.DEBUG)
		{
			return "CursorTableReference"+
				"\n\texposedName: "+exposedName+
				"\n\tbaseName: "+baseName+
				"\n\tschemaName: "+schemaName;
		}
		else
		{
			return "";
		}
	}
}