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1
29
30 package com.caucho.config.types;
31
32 import com.caucho.config.Config;
33 import com.caucho.config.NodeBuilder;
34 import com.caucho.config.TypeStrategy;
35 import com.caucho.el.ELParser;
36 import com.caucho.el.Expr;
37 import com.caucho.util.L10N;
38 import com.caucho.vfs.Path;
39 import com.caucho.vfs.Vfs;
40
41 import org.w3c.dom.Node  ;
42
43 import javax.el.ELContext;
44 import javax.el.ELException;
45
46 public class PathTypeStrategy extends TypeStrategy {
47 protected static final L10N L = new L10N(PathTypeStrategy.class);
48
49
56 public Object configure(NodeBuilder builder, Node node, Object parent)
57 throws Exception
58 {
59 String userPath = builder.configureRawString(node);
60
61 return lookupPath(userPath);
62 }
63
64 public static Path lookupPath(String string)
65 throws ELException
66 {
67 return lookupPath(string,
68 Config.getEnvironment(),
69 Vfs.lookup());
70 }
71
72 public static Path lookupPath(String string, ELContext env)
73 throws ELException
74 {
75 return lookupPath(string, env, Vfs.lookup());
76 }
77
78 public static Path lookupPath(String string, ELContext env, Path pwd)
79 throws ELException
80 {
81 if (env == null)
82 env = Config.getEnvironment();
83
84 string = rewritePathString(string);
85
86 Expr expr = new ELParser(env, string).parse();
87
88 Object obj = expr.evalObject(env);
89
90 if (obj == null)
91 throw new NullPointerException (L.l("Path '{0}' evaluated to null.",
92 string));
93 if (obj instanceof Path)
94 return (Path) obj;
95
96 String value = Expr.toString(obj, env);
97
98 if (pwd != null)
99 return pwd.lookup(value);
100 else
101 return Vfs.lookup(value);
102 }
103
104
112 public static String rewritePathString(String pathName)
113 {
114 if (pathName == null)
115 return ".";
116
117 StringBuilder cb = new StringBuilder ();
118
119 int length = pathName.length();
120 for (int i = 0; i < length; i++) {
121 char ch = pathName.charAt(i);
122
123 if (ch != '$') {
124 cb.append(ch);
125 continue;
126 }
127
128 if (i + 1 == length) {
129 cb.append('$');
130 continue;
131 }
132
133 ch = pathName.charAt(i + 1);
134
135 if ('0' <= ch && ch <= '9') {
136 int value = 0;
137
138 for (i++;
139 i < length && (ch = pathName.charAt(i)) >= '0' && ch <= '9';
140 i++) {
141 value = 10 * value + ch - '0';
142 }
143
144 i--;
145
146 cb.append("${regexp[" + value + "]}");
147 }
148 else if ('a' <= ch && ch <= 'z' || 'A' <= ch && ch <= 'Z') {
149 int tail = i + 1;
150 for (; tail < length; tail++) {
151 ch = pathName.charAt(tail);
152
153 if (ch == '/' || ch == '\\' || ch == '$')
154 break;
155 }
156
157 cb.append("${" + pathName.substring(i + 1, tail) + "}");
158 i = tail - 1;
159 }
160 else
161 cb.append('$');
162 }
163
164 return cb.toString();
165 }
166 }
167 |
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