/*

  * Copyright (c) 2010 - 2011 Michael Schierl

  * 

  * All rights reserved.

  * 

  * Redistribution and use in source and binary forms, with or without

  * modification, are permitted provided that the following conditions

  * are met:

  * 

  * - Redistributions of source code must retain the above copyright notice,

  *   this list of conditions and the following disclaimer.

  *   

  * - Redistributions in binary form must reproduce the above copyright

  *   notice, this list of conditions and the following disclaimer in the

  *   documentation and/or other materials provided with the distribution.

  *   

  * - Neither name of the copyright holders nor the names of its

  *   contributors may be used to endorse or promote products derived from

  *   this software without specific prior written permission.

  *   

  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND THE CONTRIBUTORS

  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

  * HOLDERS OR THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,

  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,

  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS

  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR

  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE

  * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

  */

 package net.sf.jmatchparser.util.csv;

 import java.io.IOException;

 import java.util.ArrayList;

 import java.util.Iterator;

 import java.util.List;

 /**

  * An {@link AbstractCSVWriter} where you can write records into and then call

  * the {@link #toReader()} method to build an {@link AbstractCSVReader} that can

  * read exactly these records.

  */

 public class CSVReaderBuilder extends AbstractCSVWriter {

         private final List<String[]> records = new ArrayList<String[]>();

         @Override

         public void write(String... record) throws IOException {

                 records.add(record);

         }

         @Override

         public void flush() throws IOException {

         }

         @Override

         public void close() throws IOException {

         }

         /**

          * Create a CSV reader from the records written to this builder and reset

          * it.

          * 

          * @see #reset()

          */

         public AbstractCSVReader toReader() {

                 List<String[]> readerRecords = new ArrayList<String[]>(records);

                 reset();

                 return new CSVReaderBuilderReader(readerRecords.iterator());

         }

         /**

          * Reset this builder.

          */

         public void reset() {

                 records.clear();

         }

         private static class CSVReaderBuilderReader extends AbstractCSVReader {

                 private final Iterator<String[]> it;

                 public CSVReaderBuilderReader(Iterator<String[]> it) {

                         this.it = it;

                 }

                 @Override

                 public String[] read() throws IOException {

                         if (it.hasNext())

                                 return it.next();

                         else

                                 return null;

                 }

                 @Override

                 public void close() throws IOException {

                 }

         }

 }