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1
5 package com.tc.object.config;
6
7 import com.tc.logging.TCLogger;
8 import com.tc.logging.TCLogging;
9
10 import java.lang.reflect.Method  ;
11 import java.lang.reflect.Modifier ;
12 import java.lang.reflect.Constructor ;
13 import java.util.HashMap ;
14 import java.util.HashSet ;
15 import java.util.Map ;
16 import java.util.Set ;
17
18
21 public class ConfigVisitor {
22 private final Map visited = new HashMap ();
23 private final TCLogger logger = TCLogging.getLogger(getClass());
24
25 public static final String VISIT_METHOD_NAME = "visitL1DSOConfig";
26 public static final String VISIT_INSTANCE_METHOD_NAME = "instanceVisitL1DSOConfig";
27 public static final Class [] VISIT_METHOD_PARAMETERS = new Class [] { ConfigVisitor.class,
28 DSOClientConfigHelper.class };
29 public static final Class [] VISIT_METHOD_PARAMETERS_WITH_ATTRIBUTES = new Class [] { ConfigVisitor.class,
30 DSOClientConfigHelper.class, Map .class };
31 public static final String VISIT_DSO_APPLICATION_CONFIG_METHOD_NAME = "visitDSOApplicationConfig";
32 public static final Class [] VISIT_DSO_APPLICATION_CONFIG_METHOD_PARAMETERS = new Class [] { ConfigVisitor.class,
33 DSOApplicationConfig.class };
34
35 public void visitDSOApplicationConfig(DSOApplicationConfig config, Class clazz) {
36 if (checkAndSetVisited(config, clazz)) { return; }
37 doVisit(clazz, VISIT_DSO_APPLICATION_CONFIG_METHOD_NAME, VISIT_DSO_APPLICATION_CONFIG_METHOD_PARAMETERS,
38 new Object [] { this, config });
39 }
40
41 public void visit(DSOClientConfigHelper config, Visitable v) {
42 if (checkAndSetVisited(config, v)) { return; }
43 v.visit(this, config);
44 }
45
46 public void visit(DSOClientConfigHelper config, Class clazz) {
47 if (checkAndSetVisited(config, clazz)) { return; }
48 Object [] args = new Object [] { this, config };
49 if (!doInstanceVisit(clazz, VISIT_INSTANCE_METHOD_NAME, VISIT_METHOD_PARAMETERS, args)) doVisit(
51 clazz,
52 VISIT_METHOD_NAME,
53 VISIT_METHOD_PARAMETERS,
54 new Object [] {
55 this, config });
56 }
57
58 public void visit(DSOClientConfigHelper config, Class clazz, Map optionalAttributes) {
59 if (checkAndSetVisited(config, clazz)) { return; }
60 Object [] args = new Object [] { this, config };
61 if (!doInstanceVisit(clazz, VISIT_INSTANCE_METHOD_NAME, VISIT_METHOD_PARAMETERS, args)) doVisit(
63 clazz,
64 VISIT_METHOD_NAME,
65 VISIT_METHOD_PARAMETERS_WITH_ATTRIBUTES,
66 new Object [] {
67 this, config,
68 optionalAttributes });
69 }
70
71 private boolean doInstanceVisit(Class clazz, String methodName, Class [] parameters, Object [] arguments) {
73 boolean result = false;
74 try {
75 Method visitMethod = clazz.getMethod(VISIT_INSTANCE_METHOD_NAME, parameters);
76 System.out.println("instance configuration method found");
77 Constructor construct = clazz.getConstructor(new Class [0]);
78 Object instance = construct.newInstance(new Object [0]);
79 visitMethod.setAccessible(true);
80 visitMethod.invoke(instance, arguments);
81 result = true;
82 } catch (NoSuchMethodException e) {
83 } catch (Exception e) {
85 throw new RuntimeException (e);
86 }
87 return result;
88 }
89
90 private void doVisit(Class clazz, String methodName, Class [] parameters, Object [] arguments) {
91 while (clazz != null) {
92 try {
93 Method visitMethod = clazz.getMethod(methodName, parameters);
95 if (Modifier.isStatic(visitMethod.getModifiers())) {
96 visitMethod.setAccessible(true);
97 logger.info("Visiting: " + clazz.getName());
98 visitMethod.invoke(null, arguments);
99 }
100 } catch (NoSuchMethodException e) {
101 if (!Object .class.getName().equals(clazz.getName())) {
102 StringBuffer paramString = new StringBuffer ();
103 for (int i = 0; i < parameters.length; i++) {
104 if (i > 0) {
105 paramString.append(",");
106 }
107 paramString.append(parameters[i].getName());
108 }
109 logger.info("Visit method not defined: " + clazz.getName() + "." + methodName + "(" + paramString + ")");
110 }
111 continue;
112 } catch (Exception e) {
113 throw new RuntimeException (e);
114 } finally {
115 clazz = clazz.getSuperclass();
116 }
117 }
118 }
119
120 private boolean checkAndSetVisited(Object config, Class clazz) {
121 return checkAndSetVisited(config, clazz.getName());
122 }
123
124 private boolean checkAndSetVisited(Object config, Visitable v) {
125 return checkAndSetVisited(config, v.getClass());
126 }
127
128 private boolean checkAndSetVisited(Object config, Object key) {
129 Set set;
130 synchronized (visited) {
131 set = getOrCreateVisitedFor(key);
132 }
133 synchronized (set) {
134 boolean rv = !set.add(config);
135 if (rv) {
136 logger.warn("Already visited: " + key);
137 }
138 return rv;
139 }
140 }
141
142 private Set getOrCreateVisitedFor(Object key) {
143 synchronized (visited) {
144 Set set = (Set ) visited.get(key);
145 if (set == null) {
146 set = new HashSet ();
147 visited.put(key, set);
148 }
149 return set;
150 }
151 }
152
153 }
154 |
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