/**
 * (C) Copyright IBM Corp. 2010, 2015
 *
 * Licensed 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 com.ibm.bi.dml.lops;

import com.ibm.bi.dml.lops.LopProperties.ExecLocation;
import com.ibm.bi.dml.lops.LopProperties.ExecType;
import com.ibm.bi.dml.lops.compile.JobType;
import com.ibm.bi.dml.parser.Expression.*;


public class AppendR extends Lop
{	
	public static final String OPCODE = "rappend";
	
	private boolean _cbind = true;
	
	public AppendR(Lop input1, Lop input2, DataType dt, ValueType vt, boolean cbind, ExecType et) 
	{
		super(Lop.Type.Append, dt, vt);
		init(input1, input2, dt, vt, et);
		
		_cbind = cbind;
	}
	
	public void init(Lop input1, Lop input2, DataType dt, ValueType vt, ExecType et) 
	{
		addInput(input1);
		input1.addOutput(this);
		
		addInput(input2);
		input2.addOutput(this);
		
		boolean breaksAlignment = false;
		boolean aligner = false;
		boolean definesMRJob = false;
		
		if( et == ExecType.MR )
		{
			lps.addCompatibility(JobType.GMR);
			lps.addCompatibility(JobType.DATAGEN); //currently required for correctness		
			lps.setProperties( inputs, ExecType.MR, ExecLocation.Reduce, breaksAlignment, aligner, definesMRJob );
		}
		else //SP
		{
			lps.addCompatibility(JobType.INVALID);
			lps.setProperties( inputs, ExecType.SPARK, ExecLocation.ControlProgram, breaksAlignment, aligner, definesMRJob );
		}
	}
	
	@Override
	public String toString() {
		return " AppendR: ";
	}

	//called when append executes in MR
	public String getInstructions(int input_index1, int input_index2, int output_index) 
		throws LopsException
	{
		return getInstructions(
				String.valueOf(input_index1),
				String.valueOf(input_index2),
				String.valueOf(output_index) );
	}
	
	//called when append executes in CP
	public String getInstructions(String input_index1, String input_index2, String output_index) 
		throws LopsException
	{
		StringBuilder sb = new StringBuilder();
		sb.append( getExecType() );
		
		sb.append( OPERAND_DELIMITOR );
		sb.append( OPCODE );
		
		sb.append( OPERAND_DELIMITOR );
		sb.append( getInputs().get(0).prepInputOperand(input_index1+""));
		
		sb.append( OPERAND_DELIMITOR );
		sb.append( getInputs().get(1).prepInputOperand(input_index2+""));
		
		sb.append( OPERAND_DELIMITOR );
		sb.append( prepOutputOperand(output_index+"") );
		
		sb.append( OPERAND_DELIMITOR );
		sb.append( _cbind );
		
		return sb.toString();
	}
}