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1
4 package gnu.kawa.xslt;
5 import gnu.mapping.*;
6 import gnu.lists.*;
7 import gnu.expr.*;
8 import gnu.text.*;
9 import gnu.xquery.lang.*;
10 import gnu.kawa.xml.*;
11
12
13
14 public class XSLT extends XQuery
15 {
16 public static XSLT instance;
19
20 public String  getName()
21 {
22 return "XSLT";
23 }
24
25 public XSLT ()
26 {
27 instance = this;
28 ModuleBody.setMainPrintValues(true);
29 }
30
31 public static XSLT getXsltInstance()
32 {
33 if (instance == null)
34 new XSLT ();
35 return instance;
36 }
37
38 Expression parseXPath (String string, SourceMessages messages)
39 {
40 try
41 {
42 Compilation tr = new Compilation(this, messages);
43 XQParser parser
44 = (XQParser) super.getLexer(new CharArrayInPort(string), messages);
45 java.util.Vector exps = new java.util.Vector (20);
47 for (;;)
48 {
49 Expression sexp = parser.parse(tr);
50 if (sexp == null)
51 break;
52 exps.addElement(sexp);
53 }
54 int nexps = exps.size();
55 if (nexps == 0)
56 return QuoteExp.voidExp;
57 else if (nexps == 1)
58 return (Expression) exps.elementAt(0);
59 else
60 throw new InternalError ("too many xpath expressions"); }
62 catch (Throwable ex)
63 {
64 ex.printStackTrace();
65 throw new InternalError ("caught "+ex);
66 }
67 }
68
69 public gnu.text.Lexer getLexer(InPort inp, gnu.text.SourceMessages messages)
70 {
71 return new XslTranslator(inp, messages, this);
72 }
73
74
76 public Compilation getCompilation (Lexer lexer, SourceMessages messages)
77 {
78 return new Compilation(this, messages);
79 }
80
81 public boolean parse (Compilation comp, int options)
82 throws java.io.IOException , gnu.text.SyntaxException
83 {
84 Compilation.defaultCallConvention = Compilation.CALL_WITH_CONSUMER;
85 ((XslTranslator) comp.lexer).parse(comp);
86 return true;
87 }
88
89
90 public static void registerEnvironment()
91 {
92 Language.setDefaults(new XSLT());
93 }
94
95 public static void defineCallTemplate(Symbol name,
96 double priority,
97 Procedure template)
98 {
99 }
100
101 public static Symbol nullMode = Symbol.make(null, "");
102
103 public static void defineApplyTemplate(String pattern,
104 double priority,
105 Symbol mode,
106 Procedure template)
107 {
108 if (mode == null)
109 mode = nullMode;
110 TemplateTable table = TemplateTable.getTemplateTable(mode);
111 table.enter(pattern, priority, template);
112 }
113
114 public static void defineTemplate(Symbol name, String pattern,
115 double priority, Symbol mode,
116 Procedure template)
117 {
118 if (name != null)
119 defineCallTemplate(name, priority, template);
120 if (pattern != null)
121 defineApplyTemplate(pattern, priority, mode, template);
122 }
123
124 public static void process(TreeList doc, Focus pos, CallContext ctx)
125 throws Throwable
126 {
127 Consumer out = ctx.consumer;
128 for (;;)
129 {
130 int ipos = pos.ipos;
131 int kind = doc.getNextKind(ipos);
132 switch (kind)
133 {
134 case Sequence.DOCUMENT_VALUE:
135 ipos = doc.firstChildPos(ipos);
136 break;
137 case Sequence.GROUP_VALUE:
138 Object type = pos.getNextTypeObject();
139 Procedure proc = TemplateTable.nullModeTable.find(pos.getNextTypeName());
140 String name = pos.getNextTypeName();
141 if (proc != null)
142 {
143 proc.check0(ctx);
144 ctx.runUntilDone();
145 }
146 else
147 {
148 out.beginGroup(type);
149 pos.push(doc, doc.firstChildPos(ipos));
151 process(doc, pos, ctx);
152 pos.pop();
153 out.endGroup();
154 }
155 ipos = doc.nextDataIndex(ipos >>> 1) << 1;
156 pos.gotoNext();
157 break;
158 case Sequence.CHAR_VALUE:
159 int ichild = ipos >>> 1;
160 int next = doc.nextNodeIndex(ichild, -1 >>> 1);
161 if (ipos == next)
162 next = doc.nextDataIndex(ichild);
163 doc.consumeIRange(ichild, next, out);
164 ipos = next << 1;
165 break;
166 case Sequence.TEXT_BYTE_VALUE:
167 case Sequence.OBJECT_VALUE:
168 default:
169 return;
170 }
171 pos.ipos = ipos;
172 }
173 }
174
175 public static void runStylesheet()
176 throws Throwable
177 {
178 CallContext ctx = CallContext.getInstance();
179 String [] args = kawa.repl.commandLineArgArray;
180 for (int i = 0; i < args.length; i++)
181 {
182 String arg = args[i];
183 KDocument doc = Document.parse(arg);
184 Focus pos = Focus.getCurrent();
185 pos.push(doc.sequence, doc.ipos);
186 process((TreeList) doc.sequence, pos, ctx);
187 }
188 }
189
190 public static void applyTemplates(String select, Symbol mode)
191 throws Throwable
192 {
193 if (mode == null)
194 mode = nullMode;
195 TemplateTable table = TemplateTable.getTemplateTable(mode);
196 CallContext ctx = CallContext.getInstance();
197 Focus pos = Focus.getCurrent();
198 TreeList doc = (TreeList) pos.sequence;
199 pos.push(doc, doc.firstChildPos(pos.ipos));
200 process(doc, pos, ctx);
201 pos.pop();
202 }
203 }
204 |
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