View Javadoc
1   /*
2    * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4    *
5    * This code is free software; you can redistribute it and/or modify it
6    * under the terms of the GNU General Public License version 2 only, as
7    * published by the Free Software Foundation.  Oracle designates this
8    * particular file as subject to the "Classpath" exception as provided
9    * by Oracle in the LICENSE file that accompanied this code.
10   *
11   * This code is distributed in the hope that it will be useful, but WITHOUT
12   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14   * version 2 for more details (a copy is included in the LICENSE file that
15   * accompanied this code).
16   *
17   * You should have received a copy of the GNU General Public License version
18   * 2 along with this work; if not, write to the Free Software Foundation,
19   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20   *
21   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22   * or visit www.oracle.com if you need additional information or have any
23   * questions.
24   */
25  
26  package com.sun.codemodel.internal;
27  
28  import java.util.ArrayList;
29  import java.util.List;
30  
31  /**
32   * Implementation of {@link JGenerifiable}.
33   *
34   * @author
35   *     Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
36   */
37  abstract class JGenerifiableImpl implements JGenerifiable, JDeclaration {
38  
39      /** Lazily created list of {@link JTypeVar}s. */
40      private List<JTypeVar> typeVariables = null;
41  
42      protected abstract JCodeModel owner();
43  
44      public void declare( JFormatter f ) {
45          if(typeVariables!=null) {
46              f.p('<');
47              for (int i = 0; i < typeVariables.size(); i++) {
48                  if(i!=0)    f.p(',');
49                  f.d(typeVariables.get(i));
50              }
51              f.p('>');
52          }
53      }
54  
55  
56      public JTypeVar generify(String name) {
57          JTypeVar v = new JTypeVar(owner(),name);
58          if(typeVariables==null)
59              typeVariables = new ArrayList<JTypeVar>(3);
60          typeVariables.add(v);
61          return v;
62      }
63  
64      public JTypeVar generify(String name, Class<?> bound) {
65          return generify(name,owner().ref(bound));
66      }
67  
68      public JTypeVar generify(String name, JClass bound) {
69          return generify(name).bound(bound);
70      }
71  
72      public JTypeVar[] typeParams() {
73          if(typeVariables==null)
74              return JTypeVar.EMPTY_ARRAY;
75          else
76              return typeVariables.toArray(new JTypeVar[typeVariables.size()]);
77      }
78  
79  }