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1
5 package com.tc.object.walker;
6
7 import com.tc.util.ClassUtils;
8
9 import java.lang.reflect.Field  ;
10
11
14 public class PrintVisitor implements Visitor {
15 private static final String INDENT = " ";
16 private final OutputSink out;
17 private final WalkTest walkTest;
18 private final ValueFormatter formatter;
19
20 public PrintVisitor(OutputSink sink, WalkTest walkTest, ValueFormatter formatter) {
21 this.out = sink;
22 this.walkTest = walkTest;
23 this.formatter = formatter;
24 }
25
26 public void visitRootObject(MemberValue value) {
27 outputLine(typeDisplay(value.getValueObject().getClass()) + " (id " + value.getId() + ")");
28 }
29
30 private void outputLine(String line) {
31 out.output(line);
32 }
33
34 public void visitValue(MemberValue value, int depth) {
35 StringBuffer buf = new StringBuffer ();
36 boolean isLiteral = !walkTest.shouldTraverse(value);
37
38 indent(depth, buf);
39
40 if (value.isMapKey()) {
41 buf.append("key ");
42 } else if (value.isMapValue()) {
43 buf.append("value ");
44 }
45
46 Field field = value.getSourceField();
47 if (field != null) {
48 buf.append(typeDisplay(field.getType()) + " ");
49 boolean shadowed = value.isShadowed();
50 if (shadowed) {
51 buf.append(field.getDeclaringClass().getName() + ".");
52 }
53
54 buf.append(field.getName() + " ");
55 }
56
57 if (value.isElement()) {
58 buf.append("[" + value.getIndex() + "] ");
59 }
60
61 buf.append("= ");
62
63 Object o = value.getValueObject();
64
65 if (isLiteral || o == null) {
66 buf.append(formatter.format(value.getValueObject()));
67 } else {
68 if (value.isRepeated()) {
69 buf.append("(ref id " + value.getId() + ")");
70 } else {
71 if ((field != null) && (o.getClass().equals(field.getType()))) {
72 buf.append("(id " + value.getId() + ")");
73 } else {
74 buf.append("(" + typeDisplay(o.getClass()) + ", id " + value.getId() + ")");
75 }
76 }
77 }
78
79 String adorn = formatter.valueAdornment(value);
80 if (adorn != null) {
81 buf.append(adorn);
82 }
83
84 outputLine(buf.toString());
85 }
86
87 private static final String JAVA_LANG = "java.lang.";
88 private static final int JAVA_LANG_LEN = JAVA_LANG.length();
89
90 private static final String JAVA_UTIL = "java.util.";
91 private static final int JAVA_UTIL_LEN = JAVA_UTIL.length();
92
93 private static String typeDisplay(Class c) {
94 String type = c.getName();
95 int dim = 0;
96 if (c.isArray()) {
97 dim = ClassUtils.arrayDimensions(c);
98 type = ClassUtils.baseComponetType(c).getName();
99 }
100
101 if (type.startsWith(JAVA_LANG) && type.lastIndexOf('.') + 1 == JAVA_LANG_LEN) {
102 type = type.substring(JAVA_LANG_LEN);
103 } else if (type.startsWith(JAVA_UTIL) && type.lastIndexOf('.') + 1 == JAVA_UTIL_LEN) {
104 type = type.substring(JAVA_UTIL_LEN);
105 }
106
107 for (int i = 0; i < dim; i++) {
108 type = type + "[]";
109 }
110
111 return type;
112 }
113
114 public void visitMapEntry(int index, int depth) {
115 StringBuffer buf = new StringBuffer ();
116 indent(depth, buf);
117 buf.append("[entry ").append(index).append("]");
118 outputLine(buf.toString());
119 }
120
121 private static void indent(int currentDepth, StringBuffer buffer) {
122 while (currentDepth-- > 0) {
123 buffer.append(INDENT);
124 }
125 }
126
127 public interface OutputSink {
128 void output(String line);
129 }
130
131 public interface ValueFormatter {
132 String format(Object value);
133
134 String valueAdornment(MemberValue value);
135 }
136
137 } |
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