Viewing file:  Dynamic.py (3.87 KB) -rw-r--r--
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"""
EXSLT 2.0 - Dyanmic (http://www.exslt.org/dyn/index.html)
WWW: http://4suite.org/XSLT e-mail: support@4suite.org
Copyright (c) 2001 Fourthought Inc, USA. All Rights Reserved.
See http://4suite.org/COPYRIGHT for license and copyright information
"""
from Ft.Xml.XPath import parser
from Ft.Xml.XPath import Conversions
from Ft.Xml.Xslt import XsltRuntimeException, Error
from Ft.Xml.Xslt.CopyOfElement import CopyNode
EXSL_DYNAMIC_NS = "http://exslt.org/dynamic"
def Closure(context, nodeset, string):
"""
NOT YET IMPLEMENTED
The dyn:closure function creates a node set resulting from transitive
closure of evaluating the expression passed as the second argument on
each of the nodes passed as the first argument, then on the node set
resulting from that and so on until no more nodes are found.
"""
if type(nodeset) != type([]):
raise XsltRuntimeException(Error.WRONG_ARGUMENT_TYPE,
context.currentInstruction)
string = Conversions.StringValue(string)
return
def Evaluate(context, string):
"""
The dyn:evaluate function evaluates a string as an XPath expression and
returns the resulting value, which might be a boolean, number, string,
node set, result tree fragment or external object. The sole argument is
the string to be evaluated.
"""
string = Conversions.StringValue(string)
p = parser.new()
try:
result = p.parse(string).evaluate(context)
except:
import traceback
traceback.print_exc()
result = []
return result
def Map(context, nodeset, string):
"""
NOT YET IMPLEMENTED
The dyn:map function evaluates the expression passed as the second argument
for each of the nodes passed as the first argument, and returns a node set
of those values.
"""
if type(nodeset) != type([]):
raise XsltRuntimeException(Error.WRONG_ARGUMENT_TYPE,
context.currentInstruction)
string = Conversions.StringValue(string)
return
def Max(context, nodeset, string):
"""
NOT YET IMPLEMENTED
The dyn:max function calculates the maximum value for the nodes passed as
the first argument, where the value of each node is calculated dynamically
using an XPath expression passed as a string as the second argument.
"""
if type(nodeset) != type([]):
raise XsltRuntimeException(Error.WRONG_ARGUMENT_TYPE,
context.currentInstruction)
string = Conversions.StringValue(string)
return
def Min(context, nodeset, string):
"""
NOT YET IMPLEMENTED
The dyn:min function calculates the minimum value for the nodes passed as
the first argument, where the value of each node is calculated dynamically
using an XPath expression passed as a string as the second argument.
"""
if type(nodeset) != type([]):
raise XsltRuntimeException(Error.WRONG_ARGUMENT_TYPE,
context.currentInstruction)
string = Conversions.StringValue(string)
return
def Sum(context, nodeset, string):
"""
NOT YET IMPLEMENTED
The dyn:sum function calculates the sum for the nodes passed as the first
argument, where the value of each node is calculated dynamically using an
XPath expression passed as a string as the second argument.
"""
if type(nodeset) != type([]):
raise XsltRuntimeException(Error.WRONG_ARGUMENT_TYPE,
context.currentInstruction)
string = Conversions.StringValue(string)
return
ExtNamespaces = {
EXSL_DYNAMIC_NS : 'dyn',
}
ExtFunctions = {
#(EXSL_DYNAMIC_NS, 'closure') : Closure,
(EXSL_DYNAMIC_NS, 'evaluate') : Evaluate,
#(EXSL_DYNAMIC_NS, 'map') : Map,
#(EXSL_DYNAMIC_NS, 'max') : Max,
#(EXSL_DYNAMIC_NS, 'min') : Min,
#(EXSL_DYNAMIC_NS, 'sum') : Sum,
}
ExtElements = {}
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