/*

  * Copyright 2009 Ange Optimization ApS

  *

  * 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 eu.simuline.octave.io.impl;

 import java.io.BufferedReader;

 import eu.simuline.octave.io.OctaveIO;

 import eu.simuline.octave.io.spi.OctaveDataReader;

 import eu.simuline.octave.type.OctaveComplex;

 import eu.simuline.octave.util.StringUtil;

 /**

  * The reader for the octave type "complex scalar" with 'double' components 

  * reading an {@link OctaveComplex} from a {@link BufferedReader}. 

  *

  * Format is:

  *

  * <pre>

  * # type: complex scalar

  * (1.2,3.4)

  * </pre>

  */

 public final class ComplexScalarReader extends OctaveDataReader {

     @Override

     public String octaveType() {

         return "complex scalar";

     }

     // **** parsing of complex numbers shall be done in StringUtil centralized 

     @Override

     public OctaveComplex read(final BufferedReader reader) {

         final String line = OctaveIO.readerReadLine(reader);

         final int commaIndex = line.indexOf(',');

         final double real = StringUtil

             .parseDouble(line.substring(1, commaIndex));

         final double imag = StringUtil

             .parseDouble(line.substring(commaIndex + 1, line.length() - 1));

         final OctaveComplex complex = new OctaveComplex(1, 1);

         complex.setReal(real, 1, 1);

         complex.setImag(imag, 1, 1);

         return complex;

     }

 }