/**
 * (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.runtime.instructions.mr;

import com.ibm.bi.dml.lops.Ternary.OperationTypes;
import com.ibm.bi.dml.runtime.DMLRuntimeException;
import com.ibm.bi.dml.runtime.DMLUnsupportedOperationException;
import com.ibm.bi.dml.runtime.instructions.Instruction;
import com.ibm.bi.dml.runtime.instructions.InstructionUtils;
import com.ibm.bi.dml.runtime.matrix.data.MatrixValue;
import com.ibm.bi.dml.runtime.matrix.mapred.CachedValueMap;
import com.ibm.bi.dml.runtime.matrix.mapred.IndexedMatrixValue;


public class CombineTernaryInstruction extends TernaryInstruction
{
	
	public CombineTernaryInstruction(OperationTypes op, byte in1, byte in2,
			byte in3, byte out, String istr) {
		super(op, in1, in2, in3, out, -1, -1, istr);
		mrtype = MRINSTRUCTION_TYPE.CombineTernary;
	}

	public static Instruction parseInstruction ( String str ) throws DMLRuntimeException {
		
		// example instruction string - ctabletransform:::0:DOUBLE:::1:DOUBLE:::2:DOUBLE:::3:DOUBLE 
		InstructionUtils.checkNumFields ( str, 4 );
		
		String[] parts = InstructionUtils.getInstructionParts ( str );
		
		byte in1, in2, in3, out;
		String opcode = parts[0];
		in1 = Byte.parseByte(parts[1]);
		in2 = Byte.parseByte(parts[2]);
		in3 = Byte.parseByte(parts[3]);
		out = Byte.parseByte(parts[4]);
		
		if ( opcode.equalsIgnoreCase("combineternary") ) {
			return new CombineTernaryInstruction(null, in1, in2, in3, out, str);
		} 
		return null;
	}
	
	@Override
	public void processInstruction(Class<? extends MatrixValue> valueClass,
			CachedValueMap cachedValues, IndexedMatrixValue tempValue, IndexedMatrixValue zeroInput, 
			int blockRowFactor, int blockColFactor)
			throws DMLUnsupportedOperationException, DMLRuntimeException {
		throw new DMLRuntimeException("CombineTernaryInstruction.processInstruction should never be called!");
	}
}