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CloudGraph(tm) is a suite of Service Data Object (SDO) 2.1 services designed for relational and big-table style "cloud" databases, such as HBase and others.

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/**
 *        CloudGraph Community Edition (CE) License
 * 
 * This is a community release of CloudGraph, a dual-license suite of
 * Service Data Object (SDO) 2.1 services designed for relational and 
 * big-table style "cloud" databases, such as HBase and others. 
 * This particular copy of the software is released under the 
 * version 2 of the GNU General Public License. CloudGraph was developed by 
 * TerraMeta Software, Inc.
 * 
 * Copyright (c) 2013, TerraMeta Software, Inc. All rights reserved.
 * 
 * General License information can be found below.
 * 
 * This distribution may include materials developed by third
 * parties. For license and attribution notices for these
 * materials, please refer to the documentation that accompanies
 * this distribution (see the "Licenses for Third-Party Components"
 * appendix) or view the online documentation at 
 * . 
 */
package org.cloudgraph.hbase.io;

import java.io.IOException;
import java.util.List;

import org.apache.hadoop.hbase.client.Delete;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.client.Row;
import org.cloudgraph.hbase.key.StatefullColumnKeyFactory;
import org.plasma.sdo.PlasmaDataObject;
import org.plasma.sdo.PlasmaProperty;

/**
 * Provides access to the operational, configuration and other state information
 * required for write operations on a single graph row.
 * 
 * Acts as a single component within a {@link TableWriter} container
 * and encapsulates the HBase client Put and
 * Delete 
 * operations for use in write operations across multiple logical
 * entities within a graph row. 
 * 
 * 
 * @see org.cloudgraph.hbase.io.TableWriter
 * @author Scott Cinnamond
 * @since 0.5.1
 */
public interface RowWriter extends RowOperation {
	
	/**
	 * Returns the row put mutation.
	 * @return the row put mutation.
	 */
	public Put getRow();

	/**
	 * Creates a new row delete mutation, is not exists.
	 */
	public void deleteRow();

	/**
	 * Returns the existing (or creates a new) row delete mutation.
	 * @return the existing (or creates a new) row delete mutation.
	 */
	public Delete getRowDelete();

	/**
	 * Returns whether there is an existing row delete mutation.
	 * @return whether there is an existing row delete mutation.
	 */
	public boolean hasRowDelete();
	
	
	/**
	 * Return the write operations for a row. 
	 * @return the write operations for a row.
	 */
	public List getWriteOperations();

	/**
	 * Returns a single column value for this row given a context
	 * data object and property. Uses a statefull column key factory
	 * to generate a column key based on the given context data object 
	 * and property.
	 * @param dataObject the context data object
	 * @param property the context property
	 * @return the column value bytes
	 * @throws IOException
	 * 
	 * @see StatefullColumnKeyFactory
	 */
	public byte[] fetchColumnValue(PlasmaDataObject dataObject, 
			PlasmaProperty property) throws IOException;

		/**
	 * Returns the container for this writer. 
	 * @return the container for this writer.
	 */
	public TableWriter getTableWriter();
	
	/**
	 * Returns whether the root data object for this writer
	 * is created. 
	 * @return whether the root data object for this writer
	 * is created.
	 */
	public boolean isRootCreated();
	
	/**
	 * Returns whether the root data object for this writer
	 * is deleted. 
	 * @return whether the root data object for this writer
	 * is deleted.
	 */
	public boolean isRootDeleted();
}