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1 package net.sf.saxon.style;
2 import net.sf.saxon.expr.*;
3 import net.sf.saxon.instruct.*;
4 import net.sf.saxon.om.Axis;
5 import net.sf.saxon.om.AxisIterator;
6 import net.sf.saxon.om.Navigator;
7 import net.sf.saxon.om.NodeInfo;
8 import net.sf.saxon.trans.XPathException;
9 import net.sf.saxon.value.SequenceType;
10 import net.sf.saxon.value.Whitespace;
11
12
17
18 public class XSLParam extends XSLVariableDeclaration {
19
20 Expression conversion = null;
21
22 protected boolean allowsValue() {
23 return !(getParent() instanceof XSLFunction);
24 }
26
27 protected boolean allowsRequired() {
28 return !(getParent() instanceof XSLFunction);
29 }
31
32 protected boolean allowsTunnelAttribute() {
33 return true;
34 }
35
36 public void validate() throws XPathException {
37
38 NodeInfo parent = getParent();
39 boolean local = (parent instanceof XSLTemplate || parent instanceof XSLFunction);
40 global = (parent instanceof XSLStylesheet);
41
42 if (!local && !global) {
43 compileError("xsl:param must be immediately within a template, function or stylesheet", "XTSE0010");
44 }
45
46 if (!global) {
47 AxisIterator preceding = iterateAxis(Axis.PRECEDING_SIBLING);
48 while (true) {
49 NodeInfo node = (NodeInfo)preceding.next();
50 if (node == null) {
51 break;
52 }
53 if (node instanceof XSLParam) {
54 if (this.getVariableFingerprint() == ((XSLParam)node).getVariableFingerprint()) {
55 compileError("The name of the parameter is not unique", "XTSE0580");
56 }
57 } else if (node instanceof StyleElement) {
58 compileError("xsl:param must be the first element within a template or function", "XTSE0010");
59 } else {
60 if (!Whitespace.isWhite(node.getStringValueCS())) {
62 compileError("xsl:param must not be preceded by text", "XTSE0010");
63 }
64 }
65 }
66
67 SlotManager p = getContainingSlotManager();
68 if (p==null) {
69 compileError("Local variable must be declared within a template or function", "XTSE0010");
70 } else {
71 setSlotNumber(p.allocateSlotNumber(getVariableFingerprint()));
72 }
73
74 }
75
76 if (requiredParam) {
77 if (select != null) {
78 compileError("The select attribute should be omitted when required='yes'", "XTSE0010");
80 }
81 if (hasChildNodes()) {
82 compileError("A parameter specifying required='yes' must have empty content", "XTSE0010");
83 }
84 }
85
86 super.validate();
87 }
88
89
93
94 public Expression compile(Executable exec) throws XPathException {
95
96 if (getParent() instanceof XSLFunction) {
97 return null;
99 } else {
100 int slot = getSlotNumber();
101 if (requiredType != null) {
102 SuppliedParameterReference pref = new SuppliedParameterReference(slot);
103 pref.setLocationId(staticContext.getLocationMap().allocateLocationId(getSystemId(), getLineNumber()));
104 RoleLocator role = new RoleLocator(RoleLocator.VARIABLE, getVariableName(), 0, null);
105 role.setSourceLocator(new ExpressionLocation(this));
106 conversion = TypeChecker.staticTypeCheck(
107 pref,
108 requiredType,
109 false,
110 role, getStaticContext());
111 }
112
113 GeneralVariable inst;
114 if (global) {
115 inst = new GlobalParam();
116 ((GlobalParam)inst).setExecutable(getExecutable());
117 if (isRequiredParam()) {
118 getExecutable().addRequiredParam(getVariableFingerprint());
119 }
120 if (select instanceof ComputedExpression) {
121 ((ComputedExpression)select).setParentExpression(inst);
122 }
123 } else {
124 inst = new LocalParam();
125 ((LocalParam)inst).setConversion(conversion);
126 }
127 initializeInstruction(exec, inst);
128 inst.setVariableName(getVariableName());
129 inst.setSlotNumber(slot);
130 inst.setRequiredType(getRequiredType());
131 ExpressionTool.makeParentReferences(inst);
132 fixupBinding(inst);
133 return inst;
134 }
135 }
136
137
138
142
143 public SequenceType getRequiredType() {
144 if (requiredType!=null) {
145 return requiredType;
146 } else {
147 return SequenceType.ANY_SEQUENCE;
148 }
149 }
150
151 }
152
153 |
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