Class: XmlRuleVisitor

Inherits:
XmlVisitor show all
Includes:
REXML
Defined in:
lib/xmlutils/xmlrulevisitor.rb

Overview

class XmlRuleVisitor

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from XmlVisitor

#visit, #visitCondition, #visitDefault, #visitElseActions, #visitIfActions, #visitLookupData, #visitRuleset, #visitXParameter, #visitYParameter

Constructor Details

#initialize(ctx) ⇒ XmlRuleVisitor

————————————————————————————————————-# initialize - Constructor

————————————————————————————————————#



33
34
35
36
37
38
39
40
41
42
43
44
 
# File 'lib/xmlutils/xmlrulevisitor.rb', line 33

def initialize(ctx)
  super()
  @output = ""
  @lookupData = Hash.new
  @context  = ctx
  @template = GdlTemplate.new

  #@log = Logger.new(STDOUT)
  #@log.level = Logger::DEBUG


end

Instance Attribute Details

#context ⇒ Object

Returns the value of attribute context.



23
24
25
 
# File 'lib/xmlutils/xmlrulevisitor.rb', line 23

def context
  @context
end

#lookupData ⇒ Object

Returns the value of attribute lookupData.



22
23
24
 
# File 'lib/xmlutils/xmlrulevisitor.rb', line 22

def lookupData
  @lookupData
end

#template ⇒ Object

Returns the value of attribute template.



24
25
26
 
# File 'lib/xmlutils/xmlrulevisitor.rb', line 24

def template
  @template
end

Instance Method Details

#generateMsg(msgTxt) ⇒ Object

————————————————————————————————————-# generateMsg - Generate a message

msgTxt - Text of message. Used to lookup message details from context

————————————————————————————————————#



57
58
59
60
61
62
63
64
65
66
 
# File 'lib/xmlutils/xmlrulevisitor.rb', line 57

def generateMsg(msgTxt)
  msgOut = ""
  msgData = @context.messages[msgTxt]

  if (nil != msgData)
    msgOut = @template.msg(msgData)
  end

  msgOut
end

#isNumber(text) ⇒ Object

————————————————————————————————————-# isNumber - Determine if a string is in fact a number

text - string to check

————————————————————————————————————#



463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
 
# File 'lib/xmlutils/xmlrulevisitor.rb', line 463

def isNumber(text)
  @@log.debug("XmlRuleVisitor::isNumber")
  @@log.debug(text.inspect)

  if (nil != text.index('.'))
    num = text.to_f
    if (num.to_s == text)
      @@log.debug("isNumber: float: #{num.to_s}")
      return num
    end # if num
  end # if nil

  num = text.to_i
  if (num.to_s == text)
      @@log.debug("isNumber: int: #{num.to_s}")
    return num
  end # if num

  return nil

end

#isPpmVar(var) ⇒ Object 



686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
 
# File 'lib/xmlutils/xmlrulevisitor.rb', line 686

def isPpmVar(var)
  isPpm = false

  case var.varType
    when 'app'
      isPpm = true

    when 'crd'
      isPpm = true

    when 'prd'
      isPpm = true

  end # case

  isPpm
end

#visitArg(elem, data) ⇒ Object

————————————————————————————————————-# visitArg - Handle default parsing

elem - Element to visit data - output object to append GDL text to

————————————————————————————————————#



233
234
235
236
237
238
239
240
241
242
243
244
245
246
 
# File 'lib/xmlutils/xmlrulevisitor.rb', line 233

def visitArg(elem, data)
  @@log.debug("XmlRuleVisitor::visitArg")
  @@log.debug(elem.inspect)

  argData = ''

  elem.each_element do |child|
    argData += ", " if(!data.empty?)
    argData = visit(child, argData)
  end

  data += argData
  return data
end

#visitArgs(elem, data) ⇒ Object

————————————————————————————————————-# visitArgs - Handle default parsing

elem - Element to visit data - output object to append GDL text to

————————————————————————————————————#



209
210
211
212
213
214
215
216
217
218
219
220
221
 
# File 'lib/xmlutils/xmlrulevisitor.rb', line 209

def visitArgs(elem, data)
  @@log.debug("XmlRuleVisitor::visitArgs")
  @@log.debug(elem.inspect)

  argsData = ''
  elem.each_element do |child|
    argsData = visit(child, argsData)
  end

  output = "( #{argsData} )"
  data += output
  return data
end

#visitAssign(elem, data) ⇒ Object

————————————————————————————————————-# visitAssign - Handle default parsing

elem - Element to visit data - output object to append GDL text to

————————————————————————————————————#



543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
 
# File 'lib/xmlutils/xmlrulevisitor.rb', line 543

def visitAssign(elem, data)
  @@log.debug("XmlRuleVisitor::visitAssign")
  @@log.debug(elem.inspect)

  if (elem.elements.size < 1)
    @@log.error("Assign element has no children.")
  end

  if (2 != elem.elements.size)
    @@log.error("Assign element did not have the expected number of child elements.")
    return data
  end

  # visit the left side
  data = visit(elem.elements[1], data)

  data += " = "                           # Add the equals sign.

  # visit the assignment
  data = visit(elem.elements[2], data)

  data += ";\n\t\t"                           # Terminate the statement.

  return data
end

#visitAssignTo(elem, data) ⇒ Object

————————————————————————————————————-# visitAssignTo - Handle default parsing

elem - Element to visit data - output object to append GDL text to

————————————————————————————————————#



581
582
583
584
585
586
587
588
589
590
591
592
593
594
 
# File 'lib/xmlutils/xmlrulevisitor.rb', line 581

def visitAssignTo(elem, data)
  @@log.debug("XmlRuleVisitor::visitAssignTo")
  @@log.debug(elem.inspect)

  if (elem.elements.size < 1)
    @@log.error("AssignTo element has no children.")
  end

  elem.each_element do |child|
    data = visit(child, data)
  end

  return data
end

#visitAssignValue(elem, data) ⇒ Object

————————————————————————————————————-# visitAssignValue - Handle default parsing

elem - Element to visit data - output object to append GDL text to

————————————————————————————————————#



608
609
610
611
612
613
614
615
616
617
618
619
620
621
 
# File 'lib/xmlutils/xmlrulevisitor.rb', line 608

def visitAssignValue(elem, data)
  @@log.debug("XmlRuleVisitor::visitAssignValue")
  @@log.debug(elem.inspect)

  if (elem.elements.size < 1)
    @@log.error("AssignValue element has no children.")
  end

  elem.each_element do |child|
    data = visit(child, data)
  end

  return data
end

#visitBrace(elem, data) ⇒ Object

————————————————————————————————————-# visitBrace - Handle default parsing

elem - Element to visit data - output object to append GDL text to

————————————————————————————————————#



404
405
406
407
408
409
410
411
412
413
414
415
416
417
 
# File 'lib/xmlutils/xmlrulevisitor.rb', line 404

def visitBrace(elem, data)
  @@log.debug("XmlRuleVisitor::visitBrace")
  @@log.debug(elem.inspect)

  data += "("

  elem.each_element do |child|
    data = visit(child, data)
  end

  data += ")"

  return data
end

#visitCompute(elem, data) ⇒ Object

————————————————————————————————————-# visitCompute - Handle default parsing

elem - Element to visit data - output object to append GDL text to

————————————————————————————————————#



258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
 
# File 'lib/xmlutils/xmlrulevisitor.rb', line 258

def visitCompute(elem, data)
  @@log.debug("XmlRuleVisitor::visitCompute")
  @@log.debug(elem.inspect)

  if (3 != elem.elements.size)
    @@log.error("Compute element did not have the expected number of child elements.")
    return data
  end

  # visit the left side
  data = visit(elem.elements[2], data)

  # visit the operator
  data = visit(elem.elements[1], data)

  # visit the right side
  data = visit(elem.elements[3], data)

  return data
end

#visitConstant(elem, data) ⇒ Object

————————————————————————————————————-# visitConstant - Handle default parsing

elem - Element to visit data - output object to append GDL text to

————————————————————————————————————#



431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
 
# File 'lib/xmlutils/xmlrulevisitor.rb', line 431

def visitConstant(elem, data)
  @@log.debug("XmlRuleVisitor::visitConstant")
  @@log.debug(elem.inspect)

  if (!elem.has_text?)
    @@log.error("A CONSTANT element does not have any text.")
    return data
  end

  text = elem.text
  num = isNumber(text)
  if (nil != num)
    data += num.to_s                          # TODO Fix the fact that numbers are also returned as text.
  else
    data += "\"#{text}\""
  end

  return data
end

#visitDPM(elem, data) ⇒ Object

————————————————————————————————————-# visitDPM - Handle default parsing

elem - Element to visit data - output object to append GDL text to

————————————————————————————————————#



520
521
522
523
524
525
526
527
528
529
 
# File 'lib/xmlutils/xmlrulevisitor.rb', line 520

def visitDPM(elem, data)
  @@log.debug("XmlRuleVisitor::visitDPM")
  @@log.debug(elem.inspect)

  varName = @context.dpms[elem.attributes['Name']].name

  data += varName

  return data
end

#visitExpression(elem, data) ⇒ Object

————————————————————————————————————-# visitExpression - Handle default parsing

elem - Element to visit data - output object to append GDL text to

————————————————————————————————————#



291
292
293
294
295
296
297
298
299
300
 
# File 'lib/xmlutils/xmlrulevisitor.rb', line 291

def visitExpression(elem, data)
  @@log.debug("XmlRuleVisitor::visitExpression")
  @@log.debug(elem.inspect)

  elem.each_element do |child|
    data = visit(child, data)
  end

  return data
end

#visitLeftOperand(elem, data) ⇒ Object

————————————————————————————————————-# visitLeftOperand - Handle default parsing

elem - Element to visit data - output object to append GDL text to

————————————————————————————————————#



314
315
316
317
318
319
320
321
322
323
 
# File 'lib/xmlutils/xmlrulevisitor.rb', line 314

def visitLeftOperand(elem, data)
  @@log.debug("XmlRuleVisitor::visitLeftOperand")
  @@log.debug(elem.inspect)

  elem.each_element do |child|
    data = visit(child, data)
  end

  return data
end

#visitLookup(elem, data) ⇒ Object

————————————————————————————————————-# visitLookup - Handle default parsing

elem - Element to visit data - output object to append GDL text to

————————————————————————————————————#



635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
 
# File 'lib/xmlutils/xmlrulevisitor.rb', line 635

def visitLookup(elem, data)
  @@log.debug("XmlRuleVisitor::visitLookup")
  @@log.debug(elem.inspect)

  lkName = elem.attributes['Name']
  lkParams = @context.getLookupParamNames(lkName)

  data += @template.lookup(lkName, lkParams["xparam"], lkParams["yparam"])

  return data

  lkup = @context.lookups[lkName]

  #puts lkup.inspect

  x = nil
  y = nil

  if (isPpmVar(lkup.xParam))
    x = @context.ppms[lkup.xParam.alias]
  else
    x = @context.dpms[lkup.xParam.alias]
  end # if PPM

  #puts x.inspect

  if (isPpmVar(lkup.yParam))
    y = @context.ppms[lkup.yParam.alias]
  else
    y = @context.dpms[lkup.yParam.alias]
  end # if PPM

  #puts y.inspect

  if (nil == x)
    raise "Unable to find xParam (#{lkup.xParam.alias}) in lookup #{lkName}"
  end # if nil

  if (nil == y)
    raise "Unable to find yParam (#{lkup.yParam.alias}) in lookup #{lkName}"
  end # if nil

#   data += lkup.toGdlRef()
  data += @template.lookup(lkName, x.name, y.name)

  return data
end

#visitOperator(elem, data) ⇒ Object

————————————————————————————————————-# visitOperator - Handle default parsing

elem - Element to visit data - output object to append GDL text to

————————————————————————————————————#



360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
 
# File 'lib/xmlutils/xmlrulevisitor.rb', line 360

def visitOperator(elem, data)
  @@log.debug("XmlRuleVisitor::visitOperator")
  @@log.debug(elem.inspect)

  if (!elem.has_text?)
    @@log.error("An OPERATOR element does not have any text.")
    return data
  end

  case elem.text
    when '&lt;'
      data += ' < '

    when '&gt;'
      data += ' > '

    when '&lt;&gt;', '<>'
      data += ' != '

    when 'OR'
      data += " ||\n\t\t"

    when 'AND'
      data += " &&\n\t\t"

    else
      data += " #{elem.text} "
  end

  return data
end

#visitPPM(elem, data) ⇒ Object

————————————————————————————————————-# visitPPM - Handle default parsing

elem - Element to visit data - output object to append GDL text to

————————————————————————————————————#



497
498
499
500
501
502
503
504
505
506
 
# File 'lib/xmlutils/xmlrulevisitor.rb', line 497

def visitPPM(elem, data)
  @@log.debug("XmlRuleVisitor::visitPPM")
  @@log.debug(elem.inspect)

  varName = @context.ppms[elem.attributes['Name']].name

  data += varName

  return data
end

#visitRightOperand(elem, data) ⇒ Object

————————————————————————————————————-# visitRightOperand - Handle default parsing

elem - Element to visit data - output object to append GDL text to

————————————————————————————————————#



337
338
339
340
341
342
343
344
345
346
 
# File 'lib/xmlutils/xmlrulevisitor.rb', line 337

def visitRightOperand(elem, data)
  @@log.debug("XmlRuleVisitor::visitRightOperand")
  @@log.debug(elem.inspect)

  elem.each_element do |child|
    data = visit(child, data)
  end

  return data
end

#visitRule(elem, data) ⇒ Object

————————————————————————————————————-# visitRule - Handle default parsing

elem - Element to visit data - output object to append GDL text to

————————————————————————————————————#



80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
 
# File 'lib/xmlutils/xmlrulevisitor.rb', line 80

def visitRule(elem, data)
  @@log.debug("XmlRuleVisitor::visitRule")
  @@log.debug(elem.inspect)


  ruleAlias = elem.attributes['Name']
  ruleData  = @context.rules[ruleAlias]
  raise "Rule data not found: #{ruleAlias}" unless (ruleData.kind_of? Rule)

  ruleName = ruleData.name

  ruleCond = ""
  elem.each_element do |child|
    if ("Condition" == child.name)
      ruleCond = visit(child, ruleCond)
      break
    end
  end

  ifActions = ""
  elem.each_element do |child|
    if ("IfActions" == child.name)
      ifActions = visit(child, ifActions)
      break
    end
  end

  elseActions = ""
  elem.each_element do |child|
    if ("ElseActions" == child.name)
      elseActions = visit(child, elseActions)
      break
    end
  end


  ifMsgs = ""                               # Generate 'If' messages
  ruleData.ifMsgs.each do |msgTxt|
    ifMsgs += generateMsg(msgTxt)
  end # ifMsgs.each

  elseMsgs = ""                             # Generate 'Else' messages
  ruleData.elseMsgs.each do |msgTxt|
    elseMsgs += generateMsg(msgTxt)
  end # ifMsgs.each



  aliasStmt = ""                          # Don't create an alias statement if it is not needed.
  if (ruleName != ruleAlias)
    aliasStmt = <<EOF
alias(rule, #{ruleName}, "#{ruleAlias}");
EOF
  end # if rulename...

                                          # Create rule template
  output = <<EOF
#{aliasStmt}
// ############################################
// #{ruleName}

rule #{ruleName}()
  if(
      #{ruleCond}
    )
  then
      #{ifActions}
#{ifMsgs}
EOF

  if (elseActions.length > 0)
    output += <<EOF
  else
      #{elseActions}
#{elseMsgs}
EOF
  end

  output += <<EOF
  end
end // rule




EOF

  data += output
  return data
end

#visitXmlFunction(elem, data) ⇒ Object

————————————————————————————————————-# visitXmlFunction - Handle default parsing

elem - Element to visit data - output object to append GDL text to

————————————————————————————————————#



183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
 
# File 'lib/xmlutils/xmlrulevisitor.rb', line 183

def visitXmlFunction(elem, data)
  @@log.debug("XmlRuleVisitor::visitXmlFunction")
  @@log.debug(elem.inspect)

  funcName  = elem.attributes['Name']

  funcArgs = ''
  elem.each_element do |child|
    funcArgs = visit(child, funcArgs)
  end

  output = "#{funcName}#{funcArgs}"
  data += output
  return data
end