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1
10
11 package com.triactive.jdo.util;
12
13 import javax.jdo.JDOUserException;
14
15
16 public class MacroString
17 {
18 private final Class  thisClass;
19 private final Imports imports;
20 private final String macroString;
21
22
23 public MacroString(Class thisClass, String importsString, String macroString)
24 {
25 this.thisClass = thisClass;
26 this.macroString = macroString;
27
28 imports = new Imports();
29 imports.importPackage(thisClass);
30
31 if (importsString != null)
32 imports.parseImports(importsString);
33 }
34
35
36 public String substituteMacros(MacroHandler mh)
37 {
38 StringBuffer outBuf = new StringBuffer ();
39 int left, right;
40
41
42 for (int curr = 0; curr < macroString.length(); curr = right + 1)
43 {
44 if ((left = macroString.indexOf('{', curr)) < 0)
45 {
46 outBuf.append(macroString.substring(curr));
47 break;
48 }
49
50 outBuf.append(macroString.substring(curr, left));
51
52 if ((right = macroString.indexOf('}', left + 1)) < 0)
53 throw new JDOUserException("Unmatched braces for identifier macro: " + macroString);
54
55 IdentifierMacro im = parseIdentifierMacro(macroString.substring(left + 1, right));
56 mh.onIdentifierMacro(im);
57
58 outBuf.append(im.value);
59 }
60
61 String tmpString = outBuf.toString();
62 outBuf = new StringBuffer ();
63
64
65 for (int curr = 0; curr < tmpString.length(); curr = right + 1)
66 {
67 if ((left = tmpString.indexOf('?', curr)) < 0)
68 {
69 outBuf.append(tmpString.substring(curr));
70 break;
71 }
72
73 outBuf.append(tmpString.substring(curr, left));
74
75 if ((right = tmpString.indexOf('?', left + 1)) < 0)
76 throw new JDOUserException("Unmatched question marks for parameter macro: " + tmpString);
77
78 ParameterMacro pm = new ParameterMacro(tmpString.substring(left + 1, right));
79 mh.onParameterMacro(pm);
80
81 outBuf.append('?');
82 }
83
84 return outBuf.toString();
85 }
86
87
88 private Class resolveClassDeclaration(String className)
89 {
90 try
91 {
92 return className.equals("this") ? thisClass : imports.resolveClassDeclaration(className);
93 }
94 catch (ClassNotFoundException e)
95 {
96 return null;
97 }
98 }
99
100
101 private IdentifierMacro parseIdentifierMacro(String unparsed)
102 {
103 String className = null;
104 String fieldName = null;
105 String subfieldName = null;
106
107 Class c = resolveClassDeclaration(unparsed);
108
109 if (c == null)
110 {
111
112 int lastDot = unparsed.lastIndexOf('.');
113
114 if (lastDot < 0)
115 throw new JDOUserException("Cannot parse identifier macro: " + unparsed);
116
117 fieldName = unparsed.substring(lastDot + 1);
118 className = unparsed.substring(0, lastDot);
119 c = resolveClassDeclaration(className);
120
121 if (c == null)
122 {
123
124 int lastDot2 = unparsed.lastIndexOf('.', lastDot - 1);
125
126 if (lastDot2 < 0)
127 throw new JDOUserException("Cannot parse identifier macro: " + unparsed);
128
129 subfieldName = fieldName;
130 fieldName = unparsed.substring(lastDot2 + 1, lastDot);
131 className = unparsed.substring(0, lastDot2);
132 c = resolveClassDeclaration(className);
133
134 if (c == null)
135 throw new JDOUserException("Cannot parse identifier macro: " + unparsed);
136 }
137 }
138
139 return new IdentifierMacro(unparsed, c, fieldName, subfieldName);
140 }
141
142
143 public static class IdentifierMacro
144 {
145 public final String unparsed;
146 public final Class clazz;
147 public final String fieldName;
148 public final String subfieldName;
149 public String value;
150
151 IdentifierMacro(String unparsed, Class clazz, String fieldName, String subfieldName)
152 {
153 this.unparsed = unparsed;
154 this.clazz = clazz;
155 this.fieldName = fieldName;
156 this.subfieldName = subfieldName;
157 this.value = null;
158 }
159
160 public String toString()
161 {
162 return "{" + unparsed + "}";
163 }
164 }
165
166
167 public static class ParameterMacro
168 {
169 public final String parameterName;
170
171 ParameterMacro(String parameterName)
172 {
173 this.parameterName = parameterName;
174 }
175
176 public String toString()
177 {
178 return "?" + parameterName + "?";
179 }
180 }
181
182
183 public static interface MacroHandler
184 {
185 void onIdentifierMacro(IdentifierMacro im);
186 void onParameterMacro(ParameterMacro pm);
187 }
188 }
189 |
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