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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.BooleanMorpher;
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 boolean[].
29   *
30   * @author Andres Almiray <aalmiray@users.sourceforge.net>
31   */
32  public final class BooleanArrayMorpher extends AbstractArrayMorpher
33  {
34     private static final Class BOOLEAN_ARRAY_CLASS = boolean[].class;
35     private boolean defaultValue;
36  
37     public BooleanArrayMorpher()
38     {
39        super( false );
40     }
41  
42     /**
43      * @param defaultValue return value if the value to be morphed is null
44      */
45     public BooleanArrayMorpher( boolean 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 BooleanArrayMorpher) ){
61           return false;
62        }
63  
64        BooleanArrayMorpher other = (BooleanArrayMorpher) 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     public boolean getDefaultValue()
77     {
78        return defaultValue;
79     }
80  
81     public int hashCode()
82     {
83        HashCodeBuilder builder = new HashCodeBuilder();
84        if( isUseDefault() ){
85           builder.append( getDefaultValue() );
86        }
87        return builder.toHashCode();
88     }
89  
90     public Object morph( Object array )
91     {
92        if( array == null ){
93           return null;
94        }
95  
96        if( BOOLEAN_ARRAY_CLASS.isAssignableFrom( array.getClass() ) ){
97           // no conversion needed
98           return (boolean[]) array;
99        }
100 
101       if( array.getClass()
102             .isArray() ){
103          int length = Array.getLength( array );
104          int dims = getDimensions( array.getClass() );
105          int[] dimensions = createDimensions( dims, length );
106          Object result = Array.newInstance( boolean.class, dimensions );
107          BooleanMorpher morpher = isUseDefault() ? new BooleanMorpher( defaultValue )
108                : new BooleanMorpher();
109          if( dims == 1 ){
110             for( int index = 0; index < length; index++ ){
111                Array.set( result, index, morpher.morph( Array.get( array, index ) ) ? Boolean.TRUE
112                      : Boolean.FALSE );
113             }
114          }else{
115             for( int index = 0; index < length; index++ ){
116                Array.set( result, index, morph( Array.get( array, index ) ) );
117             }
118          }
119          return result;
120       }else{
121          throw new MorphException( "argument is not an array: " + array.getClass() );
122       }
123    }
124 
125    public Class morphsTo()
126    {
127       return BOOLEAN_ARRAY_CLASS;
128    }
129 }