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1   package org.apache.commons.ognl;
2   
3   /*
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   * http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  
22  /**
23   * $Id: ASTUnsignedShiftRight.java 1194869 2011-10-29 11:10:16Z mcucchiara $
24   * @author Luke Blanshard (blanshlu@netscape.net)
25   * @author Drew Davidson (drew@ognl.org)
26   */
27  class ASTUnsignedShiftRight
28      extends NumericExpression
29  {
30      public ASTUnsignedShiftRight( int id )
31      {
32          super( id );
33      }
34  
35      public ASTUnsignedShiftRight( OgnlParser p, int id )
36      {
37          super( p, id );
38      }
39  
40      protected Object getValueBody( OgnlContext context, Object source )
41          throws OgnlException
42      {
43          Object v1 = children[0].getValue( context, source );
44          Object v2 = children[1].getValue( context, source );
45          return OgnlOps.unsignedShiftRight( v1, v2 );
46      }
47  
48      public String getExpressionOperator( int index )
49      {
50          return ">>>";
51      }
52  
53      public String toGetSourceString( OgnlContext context, Object target )
54      {
55          String result = "";
56  
57          try
58          {
59  
60              String child1 = OgnlRuntime.getChildSource( context, target, children[0] );
61              child1 = coerceToNumeric( child1, context, children[0] );
62  
63              String child2 = OgnlRuntime.getChildSource( context, target, children[1] );
64              child2 = coerceToNumeric( child2, context, children[1] );
65  
66              Object v1 = children[0].getValue( context, target );
67              int type = OgnlOps.getNumericType( v1 );
68  
69              if ( type <= OgnlOps.INT )
70              {
71                  child1 = "(int)" + child1;
72                  child2 = "(int)" + child2;
73              }
74  
75              result = child1 + " >>> " + child2;
76  
77              context.setCurrentType( Integer.TYPE );
78              context.setCurrentObject( getValueBody( context, target ) );
79  
80          }
81          catch ( Throwable t )
82          {
83              throw OgnlOps.castToRuntime( t );
84          }
85  
86          return result;
87      }
88      
89      public <R, P> R accept( NodeVisitor<? extends R, ? super P> visitor, P data )
90          throws OgnlException
91      {
92          return visitor.visit( this, data );
93      }
94  }