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expression
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<xquery>my xquery / xpath2 expression</xquery> gets evaluated.

This commit is contained in:
sebd 2005-05-13 15:22:34 +00:00
parent 47302d9d02
commit 0856957b93
2 changed files with 40 additions and 0 deletions
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30
src/modules/dbxmldatabases.py
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@ -34,10 +34,13 @@ import bsddb3.db as db
import dbxml
import libxml2
import expression.core.elements as elements
import expression.core.environs as environs
import expression.core.dataholders as dataholders
import expression.core.html as html
import expression.core.logs as logs
import expression.core.namespaces as namespaces
import expression.core.things as things
import expression.modules.dbxmlcontainers as dbxmlcontainers
@ -84,6 +87,33 @@ class DbXmlDatabase(dataholders.DataHolder):
return super(DbXmlDatabase, self).walkToItem(uriPathFragments, command, instruction)
class XQuery(things.Thing):
""" Element xquery contains an XQuery expression to be evaluated.
"""
def generateXml(self, layout):
""" Appends "layout" with the result of this query
"""
manager = DbXmlDatabase._manager
queryContext = manager.createQueryContext()
try:
results = manager.query(self.node.content, queryContext)
except RuntimeError, e:
logs.error("Error in query: %s" % e)
layout.append(html.p(_("Error in query: %s") % e))
else:
output = "\n".join([value.asString() for value in results])
try:
doc = libxml2.readDoc(output, None, None, 0)
except libxml2.treeError:
# output is not an XML document, considering it as plain text
layout.append(html.html(html.body(html.pre(output))))
else:
layout.append(doc.getRootElement())
return True
elements.registerElement(namespaces.yep.uri, "xquery", XQuery)
def __init__():
""" Opens a Berkeley DB environment and an XmlManager around it.
Then opens all configured containers.

10
vhosts/dbxmltest/xquery.xml Normal file
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@ -0,0 +1,10 @@
<?xml version="1.0"?>
<yep:xquery xmlns:yep="http://www.entrouvert.org/namespaces/expression/0.0">
<html xmlns="http://www.w3.org/1999/xhtml">
<body>
<p>
collection("test.dbxml")//*/text()
</p>
</body>
</html>
</yep:xquery>