ExpressionPrinter


1   /**
2    * MEDOR: Middleware Enabling Distributed Object Requests
3    *
4    * Copyright (C) 2001-2003 France Telecom R&D
5    * Contact: alexandre.lefebvre@rd.francetelecom.com
6    *
7    * This library is free software; you can redistribute it and/or
8    * modify it under the terms of the GNU Lesser General Public
9    * License as published by the Free Software Foundation; either
10   * version 2.1 of the License, or (at your option) any later version.
11   *
12   * This library is distributed in the hope that it will be useful,
13   * but WITHOUT ANY WARRANTY; without even the implied warranty of
14   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15   * Lesser General Public License for more details.
16   *
17   * You should have received a copy of the GNU Lesser General Public
18   * License along with this library; if not, write to the Free Software
19   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
20   *
21   * Initial developers: M. Alia, A. Lefebvre, S. Chassande-Barrioz
22   */
23  package org.objectweb.medor.expression.lib;
24  
25  import org.objectweb.jorm.type.api.PType;
26  import org.objectweb.medor.expression.api.BinaryOperator;
27  import org.objectweb.medor.expression.api.Operator;
28  import org.objectweb.medor.expression.api.ParameterOperand;
29  import org.objectweb.medor.expression.api.UnaryOperator;
30  import org.objectweb.medor.expression.api.Expression;
31  import org.objectweb.medor.expression.api.Operand;
32  import org.objectweb.medor.expression.api.CalculatedParameterOperand;
33  
34  /**
35   * @author S.Chassande-Barrioz
36   */
37  public class ExpressionPrinter {
38      public static String   e2str(Expression e) {
39  
40          if (e instanceof Operand) {
41              PType type = e.getType();
42              if (e instanceof ParameterOperand) {
43                  return
44                      (e instanceof CalculatedParameterOperand
45                          ? "CalculatedParam("
46                          : "Param(")
47                      + ((ParameterOperand) e).getName() + ", "
48                      + (type == null ? "nullType" : type.getJormName()) + ", "
49                      + e.toString() + ")";
50              }
51              else
52                  return e.toString();
53          } else if (e instanceof BinaryOperator) {
54              BinaryOperator bo = (BinaryOperator) e;
55              return "("
56                  + e2str(bo.getExpression(0))
57                  + " " + bo.getOperatorString() + " "
58                  + e2str(bo.getExpression(1))
59                  + ")";
60          } else if (e instanceof UnaryOperator) {
61              UnaryOperator uo = (UnaryOperator) e;
62              return uo.getOperatorString() + "("
63                  + e2str(uo.getExpression(0)) + ")";
64          } else if (e instanceof Operator) {
65              Operator op = (Operator) e;
66              StringBuffer   s = new StringBuffer  ();
67              s.append(op.getOperatorString());
68              s.append("(");
69              String   sep = "";
70              for (int i=0; i< op.getOperandNumber(); i++) {
71                  s.append(sep);
72                  sep = ", ";
73                  s.append(e2str(op.getExpression(i)));
74              }
75              s.append(")");
76              return s.toString();
77          }
78          return "";
79      }
80  
81  }
82
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