|
1
2
3 package org.apache.el.parser;
4
5 import java.math.BigDecimal  ;
6 import java.math.BigInteger ;
7
8 import javax.el.ELException;
9
10 import org.apache.el.lang.EvaluationContext;
11
12
13
17 public final class AstNegative extends SimpleNode {
18 public AstNegative(int id) {
19 super(id);
20 }
21
22 public Class getType(EvaluationContext ctx)
23 throws ELException {
24 return Number .class;
25 }
26
27 public Object getValue(EvaluationContext ctx)
28 throws ELException {
29 Object obj = this.children[0].getValue(ctx);
30
31 if (obj == null) {
32 return new Long (0);
33 }
34 if (obj instanceof BigDecimal ) {
35 return ((BigDecimal ) obj).negate();
36 }
37 if (obj instanceof BigInteger ) {
38 return ((BigInteger ) obj).negate();
39 }
40 if (obj instanceof String ) {
41 if (isStringFloat((String ) obj)) {
42 return new Double (-Double.parseDouble((String ) obj));
43 }
44 return new Long (-Long.parseLong((String ) obj));
45 }
46 Class type = obj.getClass();
47 if (obj instanceof Long || Long.TYPE == type) {
48 return new Long (-((Long ) obj).longValue());
49 }
50 if (obj instanceof Double || Double.TYPE == type) {
51 return new Double (-((Double ) obj).doubleValue());
52 }
53 if (obj instanceof Integer || Integer.TYPE == type) {
54 return new Integer (-((Integer ) obj).intValue());
55 }
56 if (obj instanceof Float || Float.TYPE == type) {
57 return new Float (-((Float ) obj).floatValue());
58 }
59 if (obj instanceof Short || Short.TYPE == type) {
60 return new Short ((short) -((Short ) obj).shortValue());
61 }
62 if (obj instanceof Byte || Byte.TYPE == type) {
63 return new Byte ((byte) -((Byte ) obj).byteValue());
64 }
65 Long num = (Long ) coerceToNumber(obj, Long .class);
66 return new Long (-num.longValue());
67 }
68 }
69 |
Popular Tags |
Java API By Example, From Geeks To Geeks.