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1   /*
2    * Copyright 2006-2007 the original author or authors.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package net.sf.ezmorph.array;
18  
19  import java.lang.reflect.Array;
20  
21  import net.sf.ezmorph.MorphException;
22  import net.sf.ezmorph.primitive.CharMorpher;
23  
24  import org.apache.commons.lang.builder.EqualsBuilder;
25  import org.apache.commons.lang.builder.HashCodeBuilder;
26  
27  /**
28   * Morphs an array to a char[].
29   *
30   * @author Andres Almiray <aalmiray@users.sourceforge.net>
31   */
32  public final class CharArrayMorpher extends AbstractArrayMorpher
33  {
34     private static final Class CHAR_ARRAY_CLASS = char[].class;
35     private char defaultValue;
36  
37     public CharArrayMorpher()
38     {
39        super( false );
40     }
41  
42     /**
43      * @param defaultValue return value if the value to be morphed is null
44      */
45     public CharArrayMorpher( char defaultValue )
46     {
47        super( true );
48        this.defaultValue = defaultValue;
49     }
50  
51     public boolean equals( Object obj )
52     {
53        if( this == obj ){
54           return true;
55        }
56        if( obj == null ){
57           return false;
58        }
59  
60        if( !(obj instanceof CharArrayMorpher) ){
61           return false;
62        }
63  
64        CharArrayMorpher other = (CharArrayMorpher) obj;
65        EqualsBuilder builder = new EqualsBuilder();
66        if( isUseDefault() && other.isUseDefault() ){
67           builder.append( getDefaultValue(), other.getDefaultValue() );
68           return builder.isEquals();
69        }else if( !isUseDefault() && !other.isUseDefault() ){
70           return builder.isEquals();
71        }else{
72           return false;
73        }
74     }
75  
76     /**
77      * Returns the default value for this Morpher.
78      */
79     public char getDefaultValue()
80     {
81        return defaultValue;
82     }
83  
84     public int hashCode()
85     {
86        HashCodeBuilder builder = new HashCodeBuilder();
87        if( isUseDefault() ){
88           builder.append( getDefaultValue() );
89        }
90        return builder.toHashCode();
91     }
92  
93     public Object morph( Object array )
94     {
95        if( array == null ){
96           return null;
97        }
98  
99        if( CHAR_ARRAY_CLASS.isAssignableFrom( array.getClass() ) ){
100          // no conversion needed
101          return (char[]) array;
102       }
103 
104       if( array.getClass()
105             .isArray() ){
106          int length = Array.getLength( array );
107          int dims = getDimensions( array.getClass() );
108          int[] dimensions = createDimensions( dims, length );
109          Object result = Array.newInstance( char.class, dimensions );
110          CharMorpher morpher = isUseDefault() ? new CharMorpher( defaultValue ) : new CharMorpher();
111          if( dims == 1 ){
112             for( int index = 0; index < length; index++ ){
113                Array.set( result, index, new Character( morpher.morph( Array.get( array, index ) ) ) );
114             }
115          }else{
116             for( int index = 0; index < length; index++ ){
117                Array.set( result, index, morph( Array.get( array, index ) ) );
118             }
119          }
120          return result;
121       }else{
122          throw new MorphException( "argument is not an array: " + array.getClass() );
123       }
124    }
125 
126    public Class morphsTo()
127    {
128       return CHAR_ARRAY_CLASS;
129    }
130 }