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1
29
30 package com.caucho.config.types;
31
32 import com.caucho.config.Config;
33 import com.caucho.config.ConfigELContext;
34 import com.caucho.el.ELParser;
35 import com.caucho.el.Expr;
36 import com.caucho.el.MapVariableResolver;
37 import com.caucho.util.CharBuffer;
38 import com.caucho.util.L10N;
39 import com.caucho.vfs.Path;
40 import com.caucho.vfs.Vfs;
41
42 import javax.el.ELContext;
43 import javax.el.ELException;
44 import javax.el.ELResolver;
45 import java.util.ArrayList  ;
46 import java.util.HashMap ;
47 import java.util.Map ;
48
49
52 public class PathBuilder {
53 private static final L10N L = new L10N(PathBuilder.class);
54
55 private String _userPath;
56
57
60 public void addText(RawString text)
61 {
62 _userPath = text.getValue().trim();
63 }
64
65
68 public Path replaceObject()
69 throws ELException
70 {
71 return lookupPath(_userPath, Config.getEnvironment());
72 }
73
74 public static Path lookupPath(String string)
75 throws ELException
76 {
77 return lookupPath(string, Config.getEnvironment());
78 }
79
80 public static Path lookupPath(String string, ArrayList vars)
81 throws ELException
82 {
83 HashMap <String ,Object > map = new HashMap <String ,Object >();
84 map.put("regexp", vars);
85
86 return lookupPath(string, map);
87 }
88
89 public static Path lookupPath(String string, Map <String ,Object > map)
90 throws ELException
91 {
92 ELContext context = Config.getEnvironment();
93 ELResolver parent = context != null ? context.getELResolver() : null;
94 ELResolver resolver;
95
96 if (map != null)
97 resolver = new MapVariableResolver(map);
98 else
99 resolver = parent;
100
101 return lookupPath(string, new ConfigELContext(resolver));
102 }
103
104 public static Path lookupPath(String string, ELContext env)
105 throws ELException
106 {
107 return lookupPath(string, env, Vfs.lookup());
108 }
109
110 public static Path lookupPath(String string, ELContext env, Path pwd)
111 throws ELException
112 {
113 if (env == null)
114 env = Config.getEnvironment();
115
116 string = rewritePathString(string);
117
118 Expr expr = new ELParser(env, string).parse();
119
120 Object obj = expr.evalObject(env);
121
122 if (obj instanceof Path)
123 return (Path) obj;
124
125 String value = Expr.toString(obj, env);
126
127 if (pwd != null)
128 return pwd.lookup(value);
129 else
130 return Vfs.lookup(value);
131 }
132
133
141 public static String rewritePathString(String pathName)
142 {
143 CharBuffer cb = CharBuffer.allocate();
144
145 int length = pathName.length();
146 for (int i = 0; i < length; i++) {
147 char ch = pathName.charAt(i);
148
149 if (ch != '$') {
150 cb.append(ch);
151 continue;
152 }
153
154 if (i + 1 == length) {
155 cb.append('$');
156 continue;
157 }
158
159 ch = pathName.charAt(i + 1);
160
161 if ('0' <= ch && ch <= '9') {
162 int value = 0;
163
164 for (i++;
165 i < length && (ch = pathName.charAt(i)) >= '0' && ch <= '9';
166 i++) {
167 value = 10 * value + ch - '0';
168 }
169
170 i--;
171
172 cb.append("${regexp[" + value + "]}");
173 }
174 else if ('a' <= ch && ch <= 'z' || 'A' <= ch && ch <= 'Z') {
175 int tail = i + 1;
176 for (; tail < length; tail++) {
177 ch = pathName.charAt(tail);
178
179 if (ch == '/' || ch == '\\' || ch == '$')
180 break;
181 }
182
183 cb.append("${Var[\"" + pathName.substring(i + 1, tail) + "\"]}");
184 i = tail - 1;
185 }
186 else
187 cb.append('$');
188 }
189
190 return cb.close();
191 }
192 }
193 |
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