001    /*
002     * Copyright (c) 2007-2014 Concurrent, Inc. All Rights Reserved.
003     *
004     * Project and contact information: http://www.cascading.org/
005     *
006     * This file is part of the Cascading project.
007     *
008     * Licensed under the Apache License, Version 2.0 (the "License");
009     * you may not use this file except in compliance with the License.
010     * You may obtain a copy of the License at
011     *
012     *     http://www.apache.org/licenses/LICENSE-2.0
013     *
014     * Unless required by applicable law or agreed to in writing, software
015     * distributed under the License is distributed on an "AS IS" BASIS,
016     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
017     * See the License for the specific language governing permissions and
018     * limitations under the License.
019     */
020    
021    package cascading.tuple.coerce;
022    
023    import java.lang.reflect.Type;
024    import java.math.BigDecimal;
025    import java.util.Map;
026    
027    /**
028     *
029     */
030    public class BigDecimalCoerce extends Coercions.Coerce<BigDecimal>
031      {
032      protected BigDecimalCoerce( Map<Type, Coercions.Coerce> map )
033        {
034        super( map );
035        }
036    
037      @Override
038      public Class<BigDecimal> getCanonicalType()
039        {
040        return BigDecimal.class;
041        }
042    
043      @Override
044      public BigDecimal coerce( Object value )
045        {
046        if( value instanceof Double )
047          return BigDecimal.valueOf( (Double) value );
048        else if( value instanceof Long )
049          return BigDecimal.valueOf( (Long) value );
050        else if( value == null || value.toString().isEmpty() )
051          return null;
052        else
053          return new BigDecimal( value.toString() );
054        }
055      }