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Java > Open Source Codes > com > caucho > java > gen > MethodCallChain


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * Resin Open Source is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * Resin Open Source is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17  * of NON-INFRINGEMENT. See the GNU General Public License for more
18  * details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with Resin Open Source; if not, write to the
22  * Free SoftwareFoundation, Inc.
23  * 59 Temple Place, Suite 330
24  * Boston, MA 02111-1307 USA
25  *
26  * @author Scott Ferguson
27  */
28
29 package com.caucho.java.gen;
30
31 import com.caucho.bytecode.JClass;
32 import com.caucho.bytecode.JMethod;
33 import com.caucho.java.JavaWriter;
34 import com.caucho.util.L10N;
35
36 import java.io.IOException JavaDoc;
37
38 /**
39  * Generates the skeleton for a method call.
40  */
41 public class MethodCallChain extends CallChain {
42   private static L10N L = new L10N(MethodCallChain.class);
43
44   private String JavaDoc _methodName;
45   private JClass []_parameterTypes;
46   private JClass _returnType;
47
48   /**
49    * Creates the chain.
50    */
51   public MethodCallChain()
52   {
53   }
54
55   /**
56    * Creates the chain with the method.
57    */
58   public MethodCallChain(JMethod method)
59   {
60     _methodName = method.getName();
61     _parameterTypes = method.getParameterTypes();
62     _returnType = method.getReturnType();
63   }
64
65   /**
66    * Creates the chain with the method.
67    */
68   public MethodCallChain(String JavaDoc methodName, JClass []params, JClass returnType)
69   {
70     _methodName = methodName;
71     _parameterTypes = params;
72     _returnType = returnType;
73   }
74
75   /**
76    * Returns the method's parameter types.
77    */
78   public JClass []getParameterTypes()
79   {
80     return _parameterTypes;
81   }
82
83   /**
84    * Returns the method's return type.
85    */
86   public JClass getReturnType()
87   {
88     return _returnType;
89   }
90   
91   /**
92    * Generates the code for the method call.
93    *
94    * @param out the writer to the output stream.
95    * @param retVar the variable to hold the return value
96    * @param var the object to be called
97    * @param args the method arguments
98    */
99   public void generateCall(JavaWriter out, String JavaDoc retVar,
100                String JavaDoc var, String JavaDoc []args)
101     throws IOException JavaDoc
102   {
103     if (getReturnType().getName().equals("void")) {
104     }
105     else if (retVar != null)
106       out.print(retVar + " = ");
107     else
108       out.print("return ");
109
110     if (var != null)
111       out.print(var + ".");
112     else
113       out.print("super.");
114     
115     out.print(_methodName + "(");
116     
117     for (int i = 0; i < args.length; i++) {
118       if (i != 0)
119         out.print(", ");
120       
121       out.print(args[i]);
122     }
123     
124     out.println(");");
125   }
126 }
127
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