ICEpdf
  1. ICEpdf
  2. PDF-786

ClassCastException: Expression cannot be cast to java.lang.Float

          Details

          • Type: Bug Bug
          • Status: Closed
          • Priority: Major Major
          • Resolution: Fixed
          • Affects Version/s: 5.0.6_P01, 5.0.7
          • Fix Version/s: 5.1
          • Component/s: Core/Parsing
          • Labels:
            None
          • Environment:
            All

            Description

            When rendering the provided PDF file, the following error is thrown and the PDF fails to render:

            java.lang.ClassCastException: org.icepdf.core.pobjects.functions.postscript.Expression cannot be cast to java.lang.Float
            at org.icepdf.core.pobjects.functions.postscript.OperatorFactory$18.eval(OperatorFactory.java:328)
            at org.icepdf.core.pobjects.functions.postscript.Lexer.operandStart(Lexer.java:225)
            at org.icepdf.core.pobjects.functions.postscript.Lexer.parse(Lexer.java:112)
            at org.icepdf.core.pobjects.functions.Function_4.calculate(Function_4.java:95)
            at org.icepdf.core.pobjects.graphics.Separation.getColor(Separation.java:179)
            at org.icepdf.core.util.content.AbstractContentParser.consume_sc(AbstractContentParser.java:414)
            at org.icepdf.core.util.content.NContentParser.parse(Unknown Source)
            at org.icepdf.core.pobjects.Page.init(Page.java:370)
            at org.icepdf.ri.common.views.PageViewComponentImpl$PageInitializer.run(PageViewComponentImpl.java:1065)
            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
            at java.lang.Thread.run(Thread.java:745)

              Activity

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              Arran Mccullough created issue -
              Patrick Corless made changes -
              Field Original Value New Value
              Fix Version/s 5.1 [ 10675 ]
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              Patrick Corless added a comment -

              The type 4 function in question uses a few operands we didn't previously have a test case for. Our lexer gets into trouble when we encounters the ifelse and exp operands.

              The lexer has been rewords and the notation of a Procedure has been introduce to aid in the property handling of the ifelse and if statements. After implementing the Procedures class it as also noticed the most of the Math.* functions where putting double values on the stack. This methods were updated to return float values.

              For references purposes the function is defined as:

              {dup 0 lt

              {pop 0 }{dup 1 gt {pop 1 } if } ifelse 0 index 1 exp 1 mul 0 add dup 0 lt {pop 0 }

              {dup 1 gt

              {pop 1 } if } ifelse 1 index 1 exp 0 mul 0 add dup 0 lt {pop 0 }{dup 1 gt {pop 1 }

              if } ifelse 2 index 1 exp 0 mul 0 add dup 0 lt

              {pop 0 }{dup 1 gt {pop 1 } if } ifelse 3 index 1 exp 0 mul 0 add dup 0 lt {pop 0 }

              {dup 1 gt

              {pop 1 }

              if } ifelse 5 4 roll pop }

              Show
              Patrick Corless added a comment - The type 4 function in question uses a few operands we didn't previously have a test case for. Our lexer gets into trouble when we encounters the ifelse and exp operands. The lexer has been rewords and the notation of a Procedure has been introduce to aid in the property handling of the ifelse and if statements. After implementing the Procedures class it as also noticed the most of the Math.* functions where putting double values on the stack. This methods were updated to return float values. For references purposes the function is defined as: {dup 0 lt {pop 0 }{dup 1 gt {pop 1 } if } ifelse 0 index 1 exp 1 mul 0 add dup 0 lt {pop 0 } {dup 1 gt {pop 1 } if } ifelse 1 index 1 exp 0 mul 0 add dup 0 lt {pop 0 }{dup 1 gt {pop 1 } if } ifelse 2 index 1 exp 0 mul 0 add dup 0 lt {pop 0 }{dup 1 gt {pop 1 } if } ifelse 3 index 1 exp 0 mul 0 add dup 0 lt {pop 0 } {dup 1 gt {pop 1 } if } ifelse 5 4 roll pop }
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              Patrick Corless added a comment -

              Marking as resolved.

              Show
              Patrick Corless added a comment - Marking as resolved.
              Patrick Corless made changes -
              Status Open [ 1 ] Resolved [ 5 ]
              Resolution Fixed [ 1 ]
              Repository Revision Date User Message
              ICEsoft Public SVN Repository #42567 Tue Sep 16 12:42:33 MDT 2014 patrick.corless PDF-786 updatd lexer to correctly handle ifelse operand.
              Files Changed
              Commit graph ADD /icepdf/branches/icepdf-5.0.1/icepdf/core/src/org/icepdf/core/pobjects/functions/postscript/Procedure.java
              Commit graph MODIFY /icepdf/branches/icepdf-5.0.1/icepdf/core/src/org/icepdf/core/pobjects/functions/postscript/OperatorFactory.java
              Commit graph MODIFY /icepdf/branches/icepdf-5.0.1/icepdf/core/src/org/icepdf/core/pobjects/functions/postscript/OperatorNames.java
              Commit graph MODIFY /icepdf/branches/icepdf-5.0.1/icepdf/core/src/org/icepdf/core/pobjects/functions/postscript/LexerText.java
              Commit graph MODIFY /icepdf/branches/icepdf-5.0.1/icepdf/core/src/org/icepdf/core/pobjects/functions/postscript/Lexer.java
              Patrick Corless made changes -
              Status Resolved [ 5 ] Closed [ 6 ]

                People

                • Assignee:
                  Patrick Corless
                  Reporter:
                  Arran Mccullough
                • Votes:
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                  Watchers:
                  2 Start watching this issue

                  Dates

                  • Created:
                    Updated:
                    Resolved: