ClassLoaderSetMetaData


1   /*
2    * Copyright (C) The Spice Group. All rights reserved.
3    *
4    * This software is published under the terms of the Spice
5    * Software License version 1.1, a copy of which has been included
6    * with this distribution in the LICENSE.txt file.
7    */
8   package org.codehaus.loom.classman.metadata;
9   
10  /**
11   * This class defines a set of ClassLoaders and the default ClassLoader to use.
12   *
13   * @author Peter Donald
14   * @version $Revision: 1.1 $ $Date: 2004/04/19 22:19:25 $
15   */
16  public class ClassLoaderSetMetaData
17  {
18      /**
19       * The name of the current classloader. This may be used by other
20       * ClassLoader definitions to refer to this ClassLoader.
21       */
22      private final String   m_default;
23  
24      /** The set of ClassLoaders predefined by the application. */
25      private final String  [] m_predefined;
26  
27      /** The classloaders defined in set. */
28      private final ClassLoaderMetaData[] m_classLoaders;
29  
30      /** The joining classloaders defined in set. */
31      private final JoinMetaData[] m_joins;
32  
33      /**
34       * Construct set with specified set and ClassLoaders.
35       *
36       * @param aDefault the name of default ClassLoader
37       * @param classLoaders the ClassLoaders in set
38       */
39      public ClassLoaderSetMetaData( final String   aDefault,
40                                     final String  [] predefined,
41                                     final ClassLoaderMetaData[] classLoaders,
42                                     final JoinMetaData[] joins )
43      {
44          if( null == aDefault )
45          {
46              throw new NullPointerException  ( "aDefault" );
47          }
48          if( null == classLoaders )
49          {
50              throw new NullPointerException  ( "classLoaders" );
51          }
52          if( null == joins )
53          {
54              throw new NullPointerException  ( "joins" );
55          }
56          if( null == predefined )
57          {
58              throw new NullPointerException  ( "predefined" );
59          }
60  
61          m_default = aDefault;
62          m_predefined = predefined;
63          m_classLoaders = classLoaders;
64          m_joins = joins;
65      }
66  
67      /**
68       * Return the default ClassLoader name.
69       *
70       * @return the default ClassLoader name.
71       */
72      public String   getDefault()
73      {
74          return m_default;
75      }
76  
77      /**
78       * Return the set of predefined ClassLoaders.
79       *
80       * @return the set of predefined ClassLoaders.
81       */
82      public String  [] getPredefined()
83      {
84          return m_predefined;
85      }
86  
87      /**
88       * Return the classloaders in set.
89       *
90       * @return the classloaders in set.
91       */
92      public ClassLoaderMetaData[] getClassLoaders()
93      {
94          return m_classLoaders;
95      }
96  
97      /**
98       * Return the "join" classloaders in set.
99       *
100      * @return the "join" classloaders in set.
101      */
102     public JoinMetaData[] getJoins()
103     {
104         return m_joins;
105     }
106 
107     /**
108      * Return true if specified name, designates a predefined ClassLoader.
109      *
110      * @return true if specified name, designates a predefined ClassLoader.
111      */
112     public boolean isPredefined( final String   name )
113     {
114         for( int i = 0; i < m_predefined.length; i++ )
115         {
116             if( m_predefined[ i ].equals( name ) )
117             {
118                 return true;
119             }
120         }
121         return false;
122     }
123 
124     /**
125      * Return the classloader with specified name.
126      *
127      * @return the classloader with specified name
128      */
129     public ClassLoaderMetaData getClassLoader( final String   name )
130     {
131         for( int i = 0; i < m_classLoaders.length; i++ )
132         {
133             final ClassLoaderMetaData classLoader = m_classLoaders[ i ];
134             if( classLoader.getName().equals( name ) )
135             {
136                 return classLoader;
137             }
138         }
139         return null;
140     }
141 
142     /**
143      * Return the "join" classloader with specified name.
144      *
145      * @return the "join" classloader with specified name
146      */
147     public JoinMetaData getJoin( final String   name )
148     {
149         for( int i = 0; i < m_joins.length; i++ )
150         {
151             final JoinMetaData join = m_joins[ i ];
152             if( join.getName().equals( name ) )
153             {
154                 return join;
155             }
156         }
157         return null;
158     }
159 }
160
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