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.util.Map;
025    
026    /**
027     *
028     */
029    public class BooleanObjectCoerce extends Coercions.Coerce<Boolean>
030      {
031      protected BooleanObjectCoerce( Map<Type, Coercions.Coerce> map )
032        {
033        super( map );
034        }
035    
036      @Override
037      public Class<Boolean> getCanonicalType()
038        {
039        return Boolean.class;
040        }
041    
042      @Override
043      public Boolean coerce( Object value )
044        {
045        if( value instanceof Boolean )
046          return (Boolean) value;
047        else if( value == null || value.toString().isEmpty() )
048          return null;
049        else
050          return Boolean.parseBoolean( value.toString() );
051        }
052      }