/*

  * Licensed to the Apache Software Foundation (ASF) under one or more

  * contributor license agreements.  See the NOTICE file distributed with

  * this work for additional information regarding copyright ownership.

  * The ASF licenses this file to You 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 org.apache.commons.flatfile.morph;

 import java.util.Arrays;

 import java.util.HashSet;

 import java.util.Locale;

 import net.sf.morph.Defaults;

 import net.sf.morph.transform.DecoratedConverter;

 import net.sf.morph.transform.transformers.BaseTransformer;

 import net.sf.morph.util.ContainerUtils;

 /**

  * Text to byte converter.

  * @version $Revision: 758023 $ $Date: 2009-03-24 16:09:19 -0500 (Tue, 24 Mar 2009) $

  */

 public class TextToByteConverter extends BaseTransformer implements

         DecoratedConverter {

     private DecoratedConverter textConverter;

     /**

      * {@inheritDoc}

      */

     @SuppressWarnings("unchecked")

     protected Object convertImpl(Class destinationClass, Object source,

             Locale locale) throws Exception {

         if (isByte(destinationClass)) {

             byte[] b = (byte[]) getTextConverter().convert(byte[].class,

                     source, locale);

             return b == null || b.length == 0 ? null : new Byte(b[0]);

         }

         byte[] b = source == null ? null : new byte[] { ((Byte) source)

                 .byteValue() };

         return getTextConverter().convert(destinationClass, b, locale);

     }

     /**

      * {@inheritDoc}

      */

     protected Class<?>[] getDestinationClassesImpl() throws Exception {

         HashSet<Class<?>> s = new HashSet<Class<?>>();

         s.addAll(Arrays.asList((Class<?>[]) getTextConverter().getDestinationClasses()));

         s.add(byte.class);

         s.add(Byte.class);

         return s.toArray(new Class[s.size()]);

     }

     /**

      * {@inheritDoc}

      */

     protected Class<?>[] getSourceClassesImpl() throws Exception {

         HashSet<Class<?>> s = new HashSet<Class<?>>();

         s.addAll(Arrays.asList((Class<?>[]) getTextConverter().getSourceClasses()));

         s.add(byte.class);

         s.add(Byte.class);

         return s.toArray(new Class[s.size()]);

     }

     /**

      * {@inheritDoc}

      */

     @SuppressWarnings("unchecked")

     protected boolean isTransformableImpl(Class destinationType,

             Class sourceType) throws Exception {

         DecoratedConverter cnv = getTextConverter();

         return (isByte(sourceType) && ContainerUtils.contains(cnv

                 .getDestinationClasses(), destinationType))

                 || (isByte(destinationType) && ContainerUtils.contains(cnv

                         .getSourceClasses(), sourceType));

     }

     /**

      * Learn whether the given class is Byte or byte.

      * @param c to check

      * @return boolean

      */

     private boolean isByte(Class<?> c) {

         return c == byte.class || c == Byte.class;

     }

     /**

      * Get the DecoratedConverter textConverter.

      * @return DecoratedConverter

      */

     public synchronized DecoratedConverter getTextConverter() {

         if (textConverter == null) {

             setTextConverter(Defaults.createTextConverter());

         }

         return textConverter;

     }

     /**

      * Set the DecoratedConverter textConverter.

      * @param textConverter DecoratedConverter

      */

     public synchronized void setTextConverter(DecoratedConverter textConverter) {

         this.textConverter = textConverter;

     }

 }