/**
 * (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.cp;

import com.ibm.bi.dml.parser.Expression.DataType;
import com.ibm.bi.dml.parser.Expression.ValueType;
import com.ibm.bi.dml.runtime.DMLRuntimeException;
import com.ibm.bi.dml.runtime.controlprogram.context.ExecutionContext;
import com.ibm.bi.dml.runtime.instructions.Instruction;
import com.ibm.bi.dml.runtime.matrix.operators.Operator;
import com.ibm.bi.dml.runtime.matrix.operators.SimpleOperator;


public class BooleanUnaryCPInstruction extends UnaryCPInstruction
{
	
	public BooleanUnaryCPInstruction(Operator op, CPOperand in, CPOperand out,
			String opcode, String instr){
		super(op, in, out, opcode, instr);
		_cptype = CPINSTRUCTION_TYPE.BooleanUnary;
	}

	public static Instruction parseInstruction (String str) throws DMLRuntimeException {
		CPOperand in = new CPOperand("", ValueType.UNKNOWN, DataType.UNKNOWN);
		CPOperand out = new CPOperand("", ValueType.UNKNOWN, DataType.UNKNOWN);
		String opcode = parseUnaryInstruction(str, in, out);
		
		// Boolean operations must be performed on BOOLEAN
		ValueType vt1 = in.getValueType();
		ValueType vt2 = out.getValueType();
		if ( vt1 != ValueType.BOOLEAN || vt2 != ValueType.BOOLEAN )
			throw new DMLRuntimeException("Unexpected ValueType in ArithmeticInstruction.");
		
		// Determine appropriate Function Object based on opcode	
		return new BooleanUnaryCPInstruction(getSimpleUnaryOperator(opcode), in, out, opcode, str);
	}
	
	@Override
	public void processInstruction(ExecutionContext ec) 
		throws DMLRuntimeException 
	{
		// 1) Obtain data objects associated with inputs 
		ScalarObject so = ec.getScalarInput(input1.getName(), input1.getValueType(), input1.isLiteral());
		
		// 2) Compute the result value & make an appropriate data object 
		SimpleOperator dop = (SimpleOperator) _optr;
		boolean rval = dop.fn.execute(so.getBooleanValue());
		
		ScalarObject sores = (ScalarObject) new BooleanObject(rval);
		
		// 3) Put the result value into ProgramBlock
		ec.setScalarOutput(output.getName(), sores);
	}
}