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1 package org.sapia.regis.cache;
2
3 import org.sapia.regis.Property;
4 import org.sapia.regis.impl.PropertyImpl;
5 import org.sapia.regis.type.BuiltinTypes;
6 import org.sapia.regis.type.Value;
7
8 public class CacheProperty extends PropertyImpl{
9
10 static final long serialVersionUID = 1L;
11
12 private static final int BOOLEAN = 0;
13 private static final int INT = 1;
14 private static final int LONG = 2;
15 private static final int FLOAT = 3;
16 private static final int DOUBLE = 4;
17
18 private transient CacheNode node;
19 private long lastModified;
20
21 private Value[] values = new Value[]{
22 Value.newInstance(BuiltinTypes.BOOLEAN_TYPE),
23 Value.newInstance(BuiltinTypes.INT_TYPE),
24 Value.newInstance(BuiltinTypes.LONG_TYPE),
25 Value.newInstance(BuiltinTypes.FLOAT_TYPE),
26 Value.newInstance(BuiltinTypes.DOUBLE_TYPE)
27 };
28
29 CacheProperty(String  name, String value, CacheNode node){
30 super(name, value);
31 this.node = node;
32 this.lastModified = node.lastModifChecksum();
33 }
34
35 public String getValue() {
36 refresh();
37 super.checkNull();
38 return super.getValue();
39 }
40
41 public boolean asBoolean() {
42 refresh();
43 super.checkNull();
44 return ((Boolean )doGetValue(BOOLEAN)).booleanValue();
45 }
46
47 public int asInt() {
48 refresh();
49 super.checkNull();
50 return ((Integer )doGetValue(INT)).intValue();
51 }
52
53 public long asLong() {
54 refresh();
55 super.checkNull();
56 return ((Long )doGetValue(LONG)).longValue();
57 }
58
59 public float asFloat() {
60 refresh();
61 super.checkNull();
62 return ((Float )doGetValue(FLOAT)).floatValue();
63 }
64
65 public double asDouble() {
66 refresh();
67 super.checkNull();
68 return ((Double )doGetValue(DOUBLE)).floatValue();
69 }
70
71 public String asString() {
72 refresh();
73 return super.asString();
74 }
75
76 private Object doGetValue(int index){
77 Object value = values[index].get();
78 if(value == null){
79 String thisValue = _value;
80 Value v = values[index];
81 values[index].set(v.getType().parse(thisValue));
82 value = values[index].get();
83 }
84 return value;
85 }
86
87 private void refresh(){
88 if(node == null){
89 return;
90 }
91 long checkSum = node.lastModifChecksum();
92 if(lastModified != checkSum){
93 synchronized(this){
94 if(lastModified != checkSum){
95 Property prop = node.getProperty(getKey());
96 super._value = prop.getValue();
97 for(int i = 0; i < values.length; i++){
98 values[i].nullify();
99 }
100 lastModified = checkSum;
101 }
102 }
103 }
104 }
105
106 }
107 |
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