-
Notifications
You must be signed in to change notification settings - Fork 396
/
SystemIdFunction.java
98 lines (83 loc) · 2.04 KB
/
SystemIdFunction.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
package org.idpf.epubcheck.util.saxon;
import net.sf.saxon.expr.XPathContext;
import net.sf.saxon.lib.ExtensionFunctionCall;
import net.sf.saxon.lib.ExtensionFunctionDefinition;
import net.sf.saxon.om.Item;
import net.sf.saxon.om.NodeInfo;
import net.sf.saxon.om.Sequence;
import net.sf.saxon.om.SequenceIterator;
import net.sf.saxon.om.StructuredQName;
import net.sf.saxon.trans.XPathException;
import net.sf.saxon.value.AnyURIValue;
import net.sf.saxon.value.SequenceType;
public class SystemIdFunction extends ExtensionFunctionDefinition
{
public static StructuredQName QNAME = new StructuredQName("saxon", "http://saxon.sf.net/", "system-id");
@Override
public StructuredQName getFunctionQName()
{
return QNAME;
}
@Override
public int getMaximumNumberOfArguments()
{
return 0;
}
@Override
public int getMinimumNumberOfArguments()
{
return 0;
}
@Override
public SequenceType[] getArgumentTypes()
{
return new SequenceType[]{};
}
@Override
public SequenceType getResultType(SequenceType[] suppliedArgumentTypes)
{
return SequenceType.SINGLE_STRING;
}
@Override
public boolean dependsOnFocus()
{
return true;
}
@Override
public boolean trustResultType()
{
return true;
}
@Override
public ExtensionFunctionCall makeCallExpression()
{
return new ExtensionFunctionCall()
{
public Sequence call(XPathContext context, Sequence[] arguments) throws XPathException
{
if (context.getContextItem() instanceof NodeInfo)
{
return new SystemIdSequence(new AnyURIValue(((NodeInfo) context.getContextItem()).getSystemId()));
}
throw new XPathException("Unexpected XPath context for saxon:line-number");
}
};
}
class SystemIdSequence implements Sequence
{
private AnyURIValue item;
public SystemIdSequence(AnyURIValue item)
{
this.item = item;
}
public Item head()
{
return item;
}
@Override
public SequenceIterator iterate()
{
return item.iterate();
}
}
}