|
1 package net.sf.saxon.style;
2 import net.sf.saxon.expr.Expression;
3 import net.sf.saxon.instruct.*;
4 import net.sf.saxon.om.*;
5 import net.sf.saxon.trans.XPathException;
6 import net.sf.saxon.type.AnyItemType;
7 import net.sf.saxon.value.EmptySequence;
8
9 import java.util.ArrayList  ;
10 import java.util.Iterator ;
11 import java.util.List ;
12
13
16
17 public class XSLAttributeSet extends StyleElement implements StylesheetProcedure {
18
19 private String nameAtt;
20
22 private String useAtt;
23
25 private SlotManager stackFrameMap;
26
28 private List attributeSetElements = null;
29
31 private AttributeSet[] useAttributeSets = null;
32
34 private AttributeSet procedure = new AttributeSet();
35
37 private int referenceCount = 0;
38
40 private boolean validated = false;
41
42 public int getAttributeSetFingerprint() {
43 return getObjectFingerprint();
44 }
45
46 public AttributeSet getInstruction() {
47 return procedure;
48 }
49
50 public void incrementReferenceCount() {
51 referenceCount++;
52 }
53
54 public void prepareAttributes() throws XPathException {
55 useAtt = null;
56
57 AttributeCollection atts = getAttributeList();
58
59 for (int a=0; a<atts.getLength(); a++) {
60 int nc = atts.getNameCode(a);
61 String f = getNamePool().getClarkName(nc);
62 if (f==StandardNames.NAME) {
63 nameAtt = atts.getValue(a).trim();
64 } else if (f==StandardNames.USE_ATTRIBUTE_SETS) {
65 useAtt = atts.getValue(a);
66 } else {
67 checkUnknownAttribute(nc);
68 }
69 }
70
71 if (nameAtt==null) {
72 reportAbsence("name");
73 return;
74 }
75
76 try {
77 setObjectNameCode(makeNameCode(nameAtt.trim()));
78 } catch (NamespaceException err) {
79 compileError(err.getMessage(), "XTSE0280");
80 } catch (XPathException err) {
81 compileError(err.getMessage(), "XTSE0280");
82 }
83
84 }
85
86 public void validate() throws XPathException {
87
88 if (validated) return;
89
90 checkTopLevel(null);
91
92 stackFrameMap = getConfiguration().makeSlotManager();
93
94 AxisIterator kids = iterateAxis(Axis.CHILD);
95 while (true) {
96 Item child = kids.next();
97 if (child == null) {
98 break;
99 }
100 if (!(child instanceof XSLAttribute)) {
101 compileError("Only xsl:attribute is allowed within xsl:attribute-set", "XTSE0010");
102 }
103 }
104
105 if (useAtt!=null) {
106
108 attributeSetElements = new ArrayList (5);
109 useAttributeSets = getAttributeSets(useAtt, attributeSetElements);
110
111
113 for (Iterator it=attributeSetElements.iterator(); it.hasNext();) {
114 ((XSLAttributeSet)it.next()).checkCircularity(this);
115 }
116 }
117
118 validated = true;
119 }
120
121
125
126 public void checkCircularity(XSLAttributeSet origin) throws XPathException {
127 if (this==origin) {
128 compileError("The definition of the attribute set is circular", "XTSE0720");
129 } else {
130 if (!validated) {
131 return;
135 }
136 if (attributeSetElements != null) {
137 for (Iterator it=attributeSetElements.iterator(); it.hasNext();) {
138 ((XSLAttributeSet)it.next()).checkCircularity(origin);
139 }
140 }
141 }
142 }
143
144
147
148 public SlotManager getSlotManager() {
149 return stackFrameMap;
150 }
151
157 public Expression compile(Executable exec) throws XPathException {
158 if (referenceCount > 0 ) {
159 Expression body = compileSequenceConstructor(exec, iterateAxis(Axis.CHILD), true);
160 if (body == null) {
161 body = EmptySequence.getInstance();
162 }
163
164 try {
165
166 body = body.simplify(getStaticContext());
167 if (getConfiguration().getTraceListener() != null) {
168 TraceWrapper trace = new TraceInstruction(body, this);
169 trace.setLocationId(allocateLocationId(getSystemId(), getLineNumber()));
170 trace.setParentExpression(procedure);
171 body = trace;
172 }
173
174 procedure.setUseAttributeSets(useAttributeSets);
175 procedure.setNameCode(getObjectNameCode());
176 procedure.setBody(body);
177 procedure.setSystemId(getSystemId());
178 procedure.setLineNumber(getLineNumber());
179 procedure.setExecutable(exec);
180
181 Expression exp2 = body.optimize(getConfiguration().getOptimizer(), staticContext, AnyItemType.getInstance());
182 if (body != exp2) {
183 procedure.setBody(exp2);
184 body = exp2;
185 }
186
187 super.allocateSlots(body);
188 procedure.setStackFrameMap(stackFrameMap);
189 } catch (XPathException e) {
190 compileError(e);
191 }
192 }
193 return null;
194 }
195
196
201
202 public int getConstructType() {
203 return StandardNames.XSL_ATTRIBUTE_SET;
204 }
205
206
207 }
208
209 |
Popular Tags |
Java API By Example, From Geeks To Geeks.