/**
 * (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.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.MatrixBlock;
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;
import com.ibm.bi.dml.runtime.matrix.operators.Operator;

public class AppendRInstruction extends AppendInstruction 
{
	public AppendRInstruction(Operator op, byte in1, byte in2, byte out, boolean cbind, String istr)
	{
		super(op, in1, in2, out, cbind, istr);
	}

	public static Instruction parseInstruction ( String str ) 
		throws DMLRuntimeException 
	{
		String[] parts = InstructionUtils.getInstructionParts ( str );
		InstructionUtils.checkNumFields(parts, 5);
		
		byte in1 = Byte.parseByte(parts[1]);
		byte in2 = Byte.parseByte(parts[2]);
		byte out = Byte.parseByte(parts[3]);
		boolean cbind = Boolean.parseBoolean(parts[4]);
			
		return new AppendRInstruction(null, in1, in2, out, cbind, str);
	}
	
	
	@Override
	public void processInstruction(Class<? extends MatrixValue> valueClass,
			CachedValueMap cachedValues, IndexedMatrixValue tempValue, IndexedMatrixValue zeroInput, int brlen, int bclen)
			throws DMLUnsupportedOperationException, DMLRuntimeException 
	{		
		//get both inputs
		IndexedMatrixValue left = cachedValues.getFirst(input1);
		IndexedMatrixValue right = cachedValues.getFirst(input2);

		//check non-existing block
		if( left == null || right == null )
			throw new DMLRuntimeException("Missing append input: isNull(left): " + (left==null) + ", isNull(right): " + (right==null));
		
		//core append operation
		MatrixBlock mbLeft = (MatrixBlock)left.getValue();
		MatrixBlock mbRight = (MatrixBlock)right.getValue();
		
		MatrixBlock ret = mbLeft.appendOperations(mbRight, new MatrixBlock(), _cbind);
		
		//put result into cache
		cachedValues.add(output, new IndexedMatrixValue(left.getIndexes(), ret));
	}
}

@@ -1581,17 +1581,17 @@
 (parts, 
-5
+4
 );%0A%09%09%0A%09%09

Fix appendr mr instruction parsing (num fields check)