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1 /*
2  * The Apache Software License, Version 1.1
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21  * "This product includes software developed by the
22  * Apache Software Foundation (http://www.apache.org/)."
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55
56 package org.apache.commons.el;
57
58 import javax.servlet.jsp.el.ELException JavaDoc;
59
60 /**
61  *
62  * <p>The implementation of the integer divide operator
63  *
64  * @author Nathan Abramson - Art Technology Group
65  * @version $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: luehe $
66  **/
67
68 public class IntegerDivideOperator
69   extends BinaryOperator
70 {
71   //-------------------------------------
72 // Singleton
73 //-------------------------------------
74
75   public static final IntegerDivideOperator SINGLETON =
76     new IntegerDivideOperator ();
77
78   //-------------------------------------
79 /**
80    *
81    * Constructor
82    **/
83   public IntegerDivideOperator ()
84   {
85   }
86
87   //-------------------------------------
88 // Expression methods
89 //-------------------------------------
90 /**
91    *
92    * Returns the symbol representing the operator
93    **/
94   public String JavaDoc getOperatorSymbol ()
95   {
96     return "idiv";
97   }
98
99   //-------------------------------------
100 /**
101    *
102    * Applies the operator to the given value
103    **/
104   public Object JavaDoc apply (Object JavaDoc pLeft,
105                Object JavaDoc pRight,
106                Logger pLogger)
107     throws ELException JavaDoc
108   {
109     if (pLeft == null &&
110     pRight == null) {
111       if (pLogger.isLoggingWarning ()) {
112     pLogger.logWarning
113       (Constants.ARITH_OP_NULL,
114        getOperatorSymbol ());
115       }
116       return PrimitiveObjects.getInteger (0);
117     }
118
119     long left =
120       Coercions.coerceToPrimitiveNumber (pLeft, Long JavaDoc.class, pLogger).
121       longValue ();
122     long right =
123       Coercions.coerceToPrimitiveNumber (pRight, Long JavaDoc.class, pLogger).
124       longValue ();
125
126     try {
127       return PrimitiveObjects.getLong (left / right);
128     }
129     catch (Exception JavaDoc exc) {
130       if (pLogger.isLoggingError ()) {
131     pLogger.logError
132       (Constants.ARITH_ERROR,
133        getOperatorSymbol (),
134        "" + left,
135        "" + right);
136       }
137       return PrimitiveObjects.getInteger (0);
138     }
139   }
140
141   //-------------------------------------
142 }
143
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