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14 package org.eclipse.jetty.io;
15
16 import java.util.ArrayList;
17 import java.util.HashMap;
18 import java.util.Map.Entry;
19
20 import org.eclipse.jetty.util.StringMap;
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27
28 public class BufferCache
29 {
30 private final HashMap _bufferMap=new HashMap();
31 private final StringMap _stringMap=new StringMap(StringMap.CASE_INSENSTIVE);
32 private final ArrayList _index= new ArrayList();
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34
35
36
37
38 public CachedBuffer add(String value, int ordinal)
39 {
40 CachedBuffer buffer= new CachedBuffer(value, ordinal);
41 _bufferMap.put(buffer, buffer);
42 _stringMap.put(value, buffer);
43 while ((ordinal - _index.size()) >= 0)
44 _index.add(null);
45 if (_index.get(ordinal)==null)
46 _index.add(ordinal, buffer);
47 return buffer;
48 }
49
50 public CachedBuffer get(int ordinal)
51 {
52 if (ordinal < 0 || ordinal >= _index.size())
53 return null;
54 return (CachedBuffer)_index.get(ordinal);
55 }
56
57 public CachedBuffer get(Buffer buffer)
58 {
59 return (CachedBuffer)_bufferMap.get(buffer);
60 }
61
62 public CachedBuffer get(String value)
63 {
64 return (CachedBuffer)_stringMap.get(value);
65 }
66
67 public Buffer lookup(Buffer buffer)
68 {
69 Buffer b= get(buffer);
70 if (b == null)
71 {
72 if (buffer instanceof Buffer.CaseInsensitve)
73 return buffer;
74 return new View.CaseInsensitive(buffer);
75 }
76
77 return b;
78 }
79
80 public CachedBuffer getBest(byte[] value, int offset, int maxLength)
81 {
82 Entry entry = _stringMap.getBestEntry(value, offset, maxLength);
83 if (entry!=null)
84 return (CachedBuffer)entry.getValue();
85 return null;
86 }
87
88 public Buffer lookup(String value)
89 {
90 Buffer b= get(value);
91 if (b == null)
92 {
93 return new CachedBuffer(value,-1);
94 }
95 return b;
96 }
97
98 public String toString(Buffer buffer)
99 {
100 return lookup(buffer).toString();
101 }
102
103 public int getOrdinal(Buffer buffer)
104 {
105 if (buffer instanceof CachedBuffer)
106 return ((CachedBuffer)buffer).getOrdinal();
107 buffer=lookup(buffer);
108 if (buffer!=null && buffer instanceof CachedBuffer)
109 return ((CachedBuffer)buffer).getOrdinal();
110 return -1;
111 }
112
113 public static class CachedBuffer extends ByteArrayBuffer.CaseInsensitive
114 {
115 private final int _ordinal;
116 private HashMap _associateMap=null;
117
118 public CachedBuffer(String value, int ordinal)
119 {
120 super(value);
121 _ordinal= ordinal;
122 }
123
124 public int getOrdinal()
125 {
126 return _ordinal;
127 }
128
129 public CachedBuffer getAssociate(Object key)
130 {
131 if (_associateMap==null)
132 return null;
133 return (CachedBuffer)_associateMap.get(key);
134 }
135
136
137 public void setAssociate(Object key, CachedBuffer associate)
138 {
139 if (_associateMap==null)
140 _associateMap=new HashMap();
141 _associateMap.put(key,associate);
142 }
143 }
144
145
146 @Override
147 public String toString()
148 {
149 return "CACHE["+
150 "bufferMap="+_bufferMap+
151 ",stringMap="+_stringMap+
152 ",index="+_index+
153 "]";
154 }
155 }