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1
18 package org.apache.activemq.util;
19
20 import java.util.Date  ;
21 import java.util.HashMap ;
22
23 import org.apache.activemq.command.ActiveMQDestination;
24
25 public class TypeConversionSupport {
26
27 static class ConversionKey {
28 final Class from;
29 final Class to;
30 final int hashCode;
31
32 public ConversionKey(Class from, Class to) {
33 this.from = from;
34 this.to = to;
35 this.hashCode = from.hashCode() ^ (to.hashCode() << 1);
36 }
37
38 public boolean equals(Object o) {
39 ConversionKey x = (ConversionKey) o;
40 return x.from == from && x.to == to;
41 }
42
43 public int hashCode() {
44 return hashCode;
45 }
46 }
47
48 interface Converter {
49 Object convert(Object value);
50 }
51
52 static final private HashMap CONVERSION_MAP = new HashMap ();
53 static {
54 Converter toStringConverter = new Converter() {
55 public Object convert(Object value) {
56 return value.toString();
57 }
58 };
59 CONVERSION_MAP.put(new ConversionKey(Boolean .class, String .class), toStringConverter);
60 CONVERSION_MAP.put(new ConversionKey(Byte .class, String .class), toStringConverter);
61 CONVERSION_MAP.put(new ConversionKey(Short .class, String .class), toStringConverter);
62 CONVERSION_MAP.put(new ConversionKey(Integer .class, String .class), toStringConverter);
63 CONVERSION_MAP.put(new ConversionKey(Long .class, String .class), toStringConverter);
64 CONVERSION_MAP.put(new ConversionKey(Float .class, String .class), toStringConverter);
65 CONVERSION_MAP.put(new ConversionKey(Double .class, String .class), toStringConverter);
66
67 CONVERSION_MAP.put(new ConversionKey(String .class, Boolean .class), new Converter() {
68 public Object convert(Object value) {
69 return Boolean.valueOf((String ) value);
70 }
71 });
72 CONVERSION_MAP.put(new ConversionKey(String .class, Byte .class), new Converter() {
73 public Object convert(Object value) {
74 return Byte.valueOf((String ) value);
75 }
76 });
77 CONVERSION_MAP.put(new ConversionKey(String .class, Short .class), new Converter() {
78 public Object convert(Object value) {
79 return Short.valueOf((String ) value);
80 }
81 });
82 CONVERSION_MAP.put(new ConversionKey(String .class, Integer .class), new Converter() {
83 public Object convert(Object value) {
84 return Integer.valueOf((String ) value);
85 }
86 });
87 CONVERSION_MAP.put(new ConversionKey(String .class, Long .class), new Converter() {
88 public Object convert(Object value) {
89 return Long.valueOf((String ) value);
90 }
91 });
92 CONVERSION_MAP.put(new ConversionKey(String .class, Float .class), new Converter() {
93 public Object convert(Object value) {
94 return Float.valueOf((String ) value);
95 }
96 });
97 CONVERSION_MAP.put(new ConversionKey(String .class, Double .class), new Converter() {
98 public Object convert(Object value) {
99 return Double.valueOf((String ) value);
100 }
101 });
102
103 Converter longConverter = new Converter() {
104 public Object convert(Object value) {
105 return new Long (((Number ) value).longValue());
106 }
107 };
108 CONVERSION_MAP.put(new ConversionKey(Byte .class, Long .class), longConverter);
109 CONVERSION_MAP.put(new ConversionKey(Short .class, Long .class), longConverter);
110 CONVERSION_MAP.put(new ConversionKey(Integer .class, Long .class), longConverter);
111 CONVERSION_MAP.put(new ConversionKey(Date .class, Long .class), new Converter() {
112 public Object convert(Object value) {
113 return new Long (((Date ) value).getTime());
114 }
115 });
116
117 Converter intConverter = new Converter() {
118 public Object convert(Object value) {
119 return new Integer (((Number ) value).intValue());
120 }
121 };
122 CONVERSION_MAP.put(new ConversionKey(Byte .class, Integer .class), intConverter);
123 CONVERSION_MAP.put(new ConversionKey(Short .class, Integer .class), intConverter);
124
125 CONVERSION_MAP.put(new ConversionKey(Byte .class, Short .class), new Converter() {
126 public Object convert(Object value) {
127 return new Short (((Number ) value).shortValue());
128 }
129 });
130
131 CONVERSION_MAP.put(new ConversionKey(Float .class, Double .class), new Converter() {
132 public Object convert(Object value) {
133 return new Double (((Number ) value).doubleValue());
134 }
135 });
136 CONVERSION_MAP.put(new ConversionKey(String .class, ActiveMQDestination.class), new Converter() {
137 public Object convert(Object value) {
138 return ActiveMQDestination.createDestination((String ) value, ActiveMQDestination.QUEUE_TYPE);
139 }
140 });
141 }
142
143 static public Object convert(Object value, Class clazz) {
144
145 assert value != null && clazz != null;
146
147 if (value.getClass() == clazz)
148 return value;
149
150 Converter c = (Converter) CONVERSION_MAP.get(new ConversionKey(value.getClass(), clazz));
151 if (c == null)
152 return null;
153 return c.convert(value);
154
155 }
156
157 }
158 |
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