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1 /*
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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 import java.math.BigDecimal JavaDoc;
60
61 /**
62  *
63  * <p>The implementation of the divide operator
64  *
65  * @author Nathan Abramson - Art Technology Group
66  * @version $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: luehe $
67  **/

68
69 public class DivideOperator
70   extends BinaryOperator
71 {
72   //-------------------------------------
73
// Singleton
74
//-------------------------------------
75

76   public static final DivideOperator SINGLETON =
77     new DivideOperator ();
78
79   //-------------------------------------
80
/**
81    *
82    * Constructor
83    **/

84   public DivideOperator ()
85   {
86   }
87
88   //-------------------------------------
89
// Expression methods
90
//-------------------------------------
91
/**
92    *
93    * Returns the symbol representing the operator
94    **/

95   public String JavaDoc getOperatorSymbol ()
96   {
97     return "/";
98   }
99
100   //-------------------------------------
101
/**
102    *
103    * Applies the operator to the given value
104    **/

105   public Object JavaDoc apply (Object JavaDoc pLeft,
106                Object JavaDoc pRight,
107                Logger pLogger)
108     throws ELException JavaDoc
109   {
110     if (pLeft == null &&
111     pRight == null) {
112       if (pLogger.isLoggingWarning ()) {
113     pLogger.logWarning
114       (Constants.ARITH_OP_NULL,
115        getOperatorSymbol ());
116       }
117       return PrimitiveObjects.getInteger (0);
118     }
119
120     if (Coercions.isBigDecimal(pLeft) ||
121         Coercions.isBigInteger(pLeft) ||
122         Coercions.isBigDecimal(pRight) ||
123         Coercions.isBigInteger(pRight)) {
124
125         BigDecimal JavaDoc left = (BigDecimal JavaDoc)
126             Coercions.coerceToPrimitiveNumber(pLeft, BigDecimal JavaDoc.class, pLogger);
127         BigDecimal JavaDoc right = (BigDecimal JavaDoc)
128             Coercions.coerceToPrimitiveNumber(pRight, BigDecimal JavaDoc.class, pLogger);
129
130         try {
131             return left.divide(right, BigDecimal.ROUND_HALF_UP);
132         } catch (Exception JavaDoc exc) {
133             if (pLogger.isLoggingError()) {
134                 pLogger.logError
135                     (Constants.ARITH_ERROR,
136                         getOperatorSymbol(),
137                         "" + left,
138                         "" + right);
139             }
140             return PrimitiveObjects.getInteger(0);
141         }
142     } else {
143
144         double left =
145             Coercions.coerceToPrimitiveNumber(pLeft, Double JavaDoc.class, pLogger).
146             doubleValue();
147         double right =
148             Coercions.coerceToPrimitiveNumber(pRight, Double JavaDoc.class, pLogger).
149             doubleValue();
150
151         try {
152             return PrimitiveObjects.getDouble(left / right);
153         } catch (Exception JavaDoc exc) {
154             if (pLogger.isLoggingError()) {
155                 pLogger.logError
156                     (Constants.ARITH_ERROR,
157                         getOperatorSymbol(),
158                         "" + left,
159                         "" + right);
160             }
161             return PrimitiveObjects.getInteger(0);
162         }
163     }
164   }
165
166   //-------------------------------------
167
}
168
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