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1
29
30 package com.caucho.el;
31
32 import com.caucho.vfs.WriteStream;
33
34 import javax.el.ELContext;
35 import javax.el.ELException;
36 import java.io.IOException  ;
37 import java.math.BigDecimal ;
38 import java.math.BigInteger ;
39
40
43 public class MulExpr extends Expr {
44 private final Expr _left;
45 private final Expr _right;
46
47
53 public MulExpr(Expr left, Expr right)
54 {
55 _left = left;
56 _right = right;
57 }
58
59
62 @Override
63 public boolean isConstant()
64 {
65 return _left.isConstant() && _right.isConstant();
66 }
67
68
75 @Override
76 public Object getValue(ELContext env)
77 throws ELException
78 {
79 Object aObj = _left.getValue(env);
80 Object bObj = _right.getValue(env);
81
82 if (aObj instanceof BigDecimal || bObj instanceof BigDecimal ) {
83 BigDecimal a = toBigDecimal(aObj, env);
84 BigDecimal b = toBigDecimal(bObj, env);
85
86 return a.multiply(b);
87 }
88 else if (isDouble(aObj)) {
89 if (bObj instanceof BigInteger ) {
90 BigDecimal a = toBigDecimal(aObj, env);
91 BigDecimal b = toBigDecimal(bObj, env);
92
93 return a.multiply(b);
94 }
95 else {
96 double a = toDouble(aObj, env);
97 double b = toDouble(bObj, env);
98 double dValue = a * b;
99
100 return Double.isNaN(dValue) ? new Double (0) : new Double (dValue);
101 }
102 }
103 else if (isDouble(bObj)) {
104 if (aObj instanceof BigInteger ) {
105 BigDecimal a = toBigDecimal(aObj, env);
106 BigDecimal b = toBigDecimal(bObj, env);
107
108 return a.multiply(b);
109 }
110 else {
111 double a = toDouble(aObj, env);
112 double b = toDouble(bObj, env);
113 double dValue = a * b;
114
115 return Double.isNaN(dValue) ? new Double (0) : new Double (dValue);
116 }
117 }
118 else if (aObj instanceof BigInteger || bObj instanceof BigInteger ) {
119 BigInteger a = toBigInteger(aObj, env);
120 BigInteger b = toBigInteger(bObj, env);
121
122 return a.multiply(b);
123 }
124
125
129
130 if (bObj instanceof Double || bObj instanceof Float ) {
131 double a = toDouble(aObj, env);
132 double b = ((Number ) bObj).doubleValue();
133 double dValue = a * b;
134
135 return Double.isNaN(dValue) ? new Double (0) : new Double (dValue);
136 }
137 else if (aObj instanceof Number ) {
138 long a = ((Number ) aObj).longValue();
139 long b = toLong(bObj, env);
140
141 return new Long (a * b);
142 }
143 else if (bObj instanceof Number ) {
144 long a = toLong(aObj, env);
145 long b = ((Number ) bObj).longValue();
146
147 return new Long (a * b);
148 }
149
150 if (isDoubleString(aObj) || isDoubleString(bObj)) {
151 double a = toDouble(aObj, env);
152 double b = toDouble(bObj, env);
153
154 return new Double (a * b);
155 }
156 else {
157 long a = toLong(aObj, env);
158 long b = toLong(bObj, env);
159
160 return new Long (a * b);
161 }
162 }
163
164
171 @Override
172 public long evalLong(ELContext env)
173 throws ELException
174 {
175 long a = _left.evalLong(env);
176 long b = _right.evalLong(env);
177
178 return a * b;
179 }
180
181
188 @Override
189 public double evalDouble(ELContext env)
190 throws ELException
191 {
192 double a = _left.evalDouble(env);
193 double b = _right.evalDouble(env);
194
195 return a * b;
196 }
197
198
203 @Override
204 public void printCreate(WriteStream os)
205 throws IOException
206 {
207 os.print("new com.caucho.el.MulExpr(");
208 _left.printCreate(os);
209 os.print(", ");
210 _right.printCreate(os);
211 os.print(")");
212 }
213
214
217 public boolean equals(Object o)
218 {
219 if (! (o instanceof MulExpr))
220 return false;
221
222 MulExpr expr = (MulExpr) o;
223
224 return (_left.equals(expr._left) &&
225 _right.equals(expr._right));
226 }
227
228
231 public String toString()
232 {
233 return "(" + _left + " + " + _right + ")";
234 }
235 }
236 |
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