|
1
4 package com.tc.object.dna.impl;
5
6 import com.tc.object.ObjectID;
7 import com.tc.object.dna.api.DNA;
8 import com.tc.object.dna.api.DNACursor;
9 import com.tc.object.dna.api.DNAException;
10 import com.tc.object.dna.api.LogicalAction;
11 import com.tc.object.dna.api.PhysicalAction;
12
13 import java.io.IOException  ;
14 import java.util.ArrayList ;
15 import java.util.List ;
16
17 public class VersionizedDNAWrapper implements DNA {
18
19 private final long version;
20 private final DNA dna;
21 private final boolean resetSupported;
22
23 public VersionizedDNAWrapper(DNA dna, long version) {
24 this(dna, version, false);
25 }
26
27 public VersionizedDNAWrapper(DNA dna, long version, boolean resetSupported) {
28 this.dna = dna;
29 this.version = version;
30 this.resetSupported = resetSupported;
31 }
32
33 public long getVersion() {
34 return version;
35 }
36
37 public boolean hasLength() {
38 return dna.hasLength();
39 }
40
41 public int getArraySize() {
42 return dna.getArraySize();
43 }
44
45 public String getTypeName() {
46 return dna.getTypeName();
47 }
48
49 public ObjectID getObjectID() throws DNAException {
50 return dna.getObjectID();
51 }
52
53 public ObjectID getParentObjectID() throws DNAException {
54 return dna.getParentObjectID();
55 }
56
57 public DNACursor getCursor() {
58 return (resetSupported ? new ResetableDNACursor(dna.getCursor()) : dna.getCursor());
59 }
60
61 public String getDefiningLoaderDescription() {
62 return dna.getDefiningLoaderDescription();
63 }
64
65 public boolean isDelta() {
66 return dna.isDelta();
67 }
68
69 public String toString() {
70 return dna.toString();
71 }
72
73 private static class ResetableDNACursor implements DNACursor {
74
75 private final DNACursor cursor;
76 private final List actions = new ArrayList ();
77 private int index = -1;
78
79 public ResetableDNACursor(DNACursor cursor) {
80 this.cursor = cursor;
81 }
82
83 public int getActionCount() {
84 return cursor.getActionCount();
85 }
86
87 public boolean next() throws IOException {
88 if(++index < actions.size()) {
89 return true;
90 }
91 boolean success = cursor.next();
92 if (success) {
93 actions.add(cursor.getAction());
94 }
95 return success;
96 }
97
98 public boolean next(DNAEncoding encoding) throws IOException , ClassNotFoundException {
99 if(++index < actions.size()) {
100 return true;
101 }
102 boolean success = cursor.next(encoding);
103 if (success) {
104 actions.add(cursor.getAction());
105 }
106 return success;
107 }
108
109 public void reset() throws UnsupportedOperationException {
110 index = -1;
111 }
112
113 public LogicalAction getLogicalAction() {
114 return (index < actions.size() ? (LogicalAction) actions.get(index) : cursor.getLogicalAction());
115 }
116
117 public PhysicalAction getPhysicalAction() {
118 return (index < actions.size() ? (PhysicalAction) actions.get(index) : cursor.getPhysicalAction());
119 }
120
121 public Object getAction() {
122 return (index < actions.size() ? actions.get(index) : cursor.getAction());
123 }
124
125 public String toString() {
126 return cursor.toString();
127 }
128
129 }
130 }
131 |
Popular Tags |
Java API By Example, From Geeks To Geeks.