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//package prerna.ds;
//
//import java.util.Iterator;
//import java.util.Map;
//
//import javax.script.Bindings;
//import javax.script.CompiledScript;
//import javax.script.ScriptContext;
//import javax.script.ScriptException;
//
//import org.apache.tinkerpop.gremlin.groovy.jsr223.GremlinGroovyScriptEngine;
//import org.apache.tinkerpop.gremlin.structure.Vertex;
//import prerna.util.Constants;
//
//import org.apache.logging.log4j.LogManager;
//import org.apache.logging.log4j.Logger;
//
//
//public class ExpressionIterator implements ExpressionMapper, Iterator {
//	
//	private static final Logger classLogger = LogManager.getLogger(ExpressionIterator.class);
//
//	protected Iterator results = null;
//	protected String [] columnsUsed = null;
//	String script = null;
//	GremlinGroovyScriptEngine engine = new GremlinGroovyScriptEngine();
//	protected boolean errored = false;
//	protected Exception baseException = null;
//	protected Bindings otherBindings = engine.getBindings(ScriptContext.ENGINE_SCOPE);
//	protected CompiledScript cs = null;
//	protected String propToGet = TinkerFrame.TINKER_NAME;
//	
//	protected ExpressionIterator() {
//		
//	}
//	
//	public ExpressionIterator(Iterator results, String [] columnsUsed, String script)
//	{
//		setData(results, columnsUsed, script);
//	}
//		
//	@Override
//	public boolean hasNext() {
//		// TODO Auto-generated method stub
//		return (results != null && results.hasNext());
//	}
//	
//	@Override
//	public Object next() {
//		// TODO Auto-generated method stub
//		// this is where we apply the calculation
//		// so I need to get the next on the map
//		// get the columns from the columns
//		// set it into the bindings on the engine
//		// run the calculation or whatever else
//		// give the result or exception
//		
//		Object retObject = null;
//		
//		if(results != null && !errored)
//		{
//			setOtherBindings();
//			long nanoTime = System.nanoTime();
//			try {
//				retObject = (Object)cs.eval();
//				long now = System.nanoTime();
////				System.out.println("Time Difference..  " + ((now - nanoTime)/1000000));
//			} catch (ScriptException e) {
//				// TODO Auto-generated catch block
//				retObject = e; // surprise !!
//				baseException = e;
//				errored = true;
//			}			
//		}
//		return retObject;
//	}
//	
//	public void setBinding(String name, Object value)
//	{
//		otherBindings.put(name,  value);
//	}
//
//	@Override
//	public void setData(Iterator results, String[] columnsUsed, String script) {
//		// TODO Auto-generated method stub
//		this.results = results;
//		this.columnsUsed = columnsUsed;
//		this.script = script;
//		try {
//			cs = engine.compile(script);
//			
//		} catch (ScriptException e) {
//			// TODO Auto-generated catch block
//			classLogger.error(Constants.STACKTRACE, e);
//		}
//	}
//	
//	protected void setOtherBindings() {
//		Object daObject = results.next();
//		Map  row = null;
//		Object[] array = null;
//		Vertex vert = null;
//		Double doubleValue = null;
//		if(daObject instanceof Map)
//			row = (Map)daObject;
//		else if(daObject instanceof Object[])
//			array = (Object[])daObject;
//		else if(daObject instanceof Vertex)
//			vert = (Vertex) daObject;
//		else if(daObject instanceof Double)
//			doubleValue = (Double)daObject;
//		
//		if(daObject != null && !errored)
//		{
//			if(row != null)
//			{
//				for(int colIndex = 0;colIndex < columnsUsed.length;colIndex++)
//				{
//					Vertex v = (Vertex)row.get(columnsUsed[colIndex]);
//					Object val = v.value(propToGet);
////					System.out.println("Values is " + val);
//					otherBindings.put(columnsUsed[colIndex], val);
//				}
//			}
//			else if(array != null)
//			{
//				for(int colIndex = 0;colIndex < columnsUsed.length;colIndex++)
//				{
//					Object val = array[colIndex];
////					System.out.println("Values is " + val);
//					otherBindings.put(columnsUsed[colIndex], val);
//				}
//			}
//			else if(vert != null)
//			{
//				Object val = vert.value(propToGet);
////				System.out.println("Values is " + val);
//				otherBindings.put(columnsUsed[0], val);
//			}
//			else if(doubleValue != null)
//			{
//				Object val = (Object)new Double(doubleValue.doubleValue());
////				System.out.println("Values is " + val);
//				otherBindings.put(columnsUsed[0], val);
//			}
//		}
//	}
//	
//	public Bindings getOtherBindings() {
//		return this.otherBindings;
//	}
//}