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1
30 package org.jruby.runtime.marshal;
31
32 import java.io.IOException  ;
33 import java.util.ArrayList ;
34 import java.util.List ;
35
36 import org.jruby.Ruby;
37 import org.jruby.RubySymbol;
38 import org.jruby.runtime.builtin.IRubyObject;
39
40 public class UnmarshalCache {
41 private final Ruby runtime;
42 private List links = new ArrayList ();
43 private List symbols = new ArrayList ();
44
45 public UnmarshalCache(Ruby runtime) {
46 this.runtime = runtime;
47 }
48
49 public void register(IRubyObject value) {
50 selectCache(value).add(value);
51 }
52
53 private List selectCache(IRubyObject value) {
54 return (value instanceof RubySymbol) ? symbols : links;
55 }
56
57 public boolean isLinkType(int c) {
58 return c == ';' || c == '@';
59 }
60
61 public IRubyObject readLink(UnmarshalStream input, int type) throws IOException {
62 if (type == '@') {
63 return linkedByIndex(input.unmarshalInt());
64 }
65 assert type == ';';
66 int i = input.unmarshalInt();
67
68 return symbolByIndex(i);
69 }
70
71 private IRubyObject linkedByIndex(int index) {
72 try {
73 return (IRubyObject) links.get(index);
74 } catch (IndexOutOfBoundsException e) {
75 throw runtime.newArgumentError("dump format error (unlinked, index: " + index + ")");
76 }
77 }
78
79 private RubySymbol symbolByIndex(int index) {
80 try {
81 return (RubySymbol) symbols.get(index);
82 } catch (IndexOutOfBoundsException e) {
83 throw runtime.newTypeError("bad symbol");
84 }
85 }
86 }
87 |
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