001/*
002 * Copyright (c) 2007-2016 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
021package cascading.tuple.coerce;
022
023import java.lang.reflect.Type;
024import java.util.Map;
025
026/**
027 *
028 */
029public class IntegerObjectCoerce extends Coercions.Coerce<Integer>
030  {
031  protected IntegerObjectCoerce( Map<Type, Coercions.Coerce> map )
032    {
033    super( map );
034    }
035
036  @Override
037  public Class<Integer> getCanonicalType()
038    {
039    return Integer.class;
040    }
041
042  @Override
043  public Integer coerce( Object value )
044    {
045    if( value instanceof Number )
046      return ( (Number) value ).intValue();
047    else if( value == null || value.toString().isEmpty() )
048      return null;
049    else
050      return Integer.parseInt( value.toString() );
051    }
052  }