/**
* (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.udf.lib;
import com.ibm.bi.dml.udf.FunctionParameter;
import com.ibm.bi.dml.udf.Matrix;
import com.ibm.bi.dml.udf.PackageFunction;
import com.ibm.bi.dml.udf.PackageRuntimeException;
import com.ibm.bi.dml.udf.Matrix.ValueType;
/**
* Wrapper class to deNaN matrices by replacing all NaNs with zeros,
* made by modifying <code>OrderWrapper.java</code>
*/
public class DeNaNWrapper extends PackageFunction
{
private static final long serialVersionUID = 1L;
private static final String OUTPUT_FILE = "TMP";
//return matrix
private Matrix ret;
@Override
public int getNumFunctionOutputs()
{
return 1;
}
@Override
public FunctionParameter getFunctionOutput(int pos)
{
if(pos == 0)
return ret;
throw new PackageRuntimeException("Invalid function output being requested");
}
@Override
public void execute()
{
try
{
Matrix inM = (Matrix) getFunctionInput(0);
double [][] inData = inM.getMatrixAsDoubleArray();
for (int i = 0; i < inData.length; i++) {
for (int j = 0; j < inData[i].length; j++) {
if (Double.isNaN (inData [i][j])) {
inData [i][j] = 0.0;
} } }
//create and copy output matrix
String dir = createOutputFilePathAndName( OUTPUT_FILE );
ret = new Matrix( dir, inM.getNumRows(), inM.getNumCols(), ValueType.Double );
ret.setMatrixDoubleArray(inData);
}
catch (Exception e)
{
throw new PackageRuntimeException("Error executing external removeNaN function", e);
}
}
}