Class: PDF::Merger

Inherits:
Object
  • Object
show all
Defined in:
lib/pdf/merger/rjb.rb,
lib/pdf/merger.rb,
lib/pdf/merger/jruby.rb

Overview

PDF::Merger::RJB

RJB needs the LD_LIBRARY_PATH and JAVA_HOME environment set for it to work correctly. For example on my system:

export LD_LIBRARY_PATH=/usr/java/jdk1.6.0/jre/lib/i386/:/usr/java/jdk1.6.0/jre/lib/i386/client/:./ export JAVA_HOME=/usr/java/jdk1.6.0/

Check the RJB documentation if you are having issues with this.

Constant Summary collapse

VERSION = 
"0.3.2"

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Merger

PDF::Merger provides an interface into iText allowing for the merging of PDFs.

Example

pdf = PDF::Merger.new pdf.add_file “foo.pdf” pdf.add_file “bar.pdf” pdf.save_as “combined.pdf”



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# File 'lib/pdf/merger.rb', line 30

def initialize
  @files_to_merge = []
  @js = nil
end

Instance Method Details

#add_file(file_path) ⇒ Object 



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# File 'lib/pdf/merger.rb', line 39

def add_file(file_path)
  @files_to_merge << file_path
end

#add_javascript(js) ⇒ Object 



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# File 'lib/pdf/merger.rb', line 35

def add_javascript(js)
  @js = js
end

#log(message) ⇒ Object 



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# File 'lib/pdf/merger.rb', line 43

def log(message)
  if defined? Rails
    Rails.logger.warn message
  else
    puts message
  end
end

#save_as(output_file_path, failure_list = []) ⇒ Object

Saves the PDF into a file defined by path given.

  • return the number of pages in the new file

  • populate failure_list with paths of missing or invalid PDFs



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# File 'lib/pdf/merger/rjb.rb', line 25

def save_as(output_file_path, failure_list=[])
  @pdfreader     = Rjb::import('com.lowagie.text.pdf.PdfReader')
  @pdfcopyfields = Rjb::import('com.lowagie.text.pdf.PdfCopyFields')
  @filestream    = Rjb::import('java.io.FileOutputStream')

  filestream = @filestream.new(output_file_path)
  copy = @pdfcopyfields.new(filestream)
  
  @files_to_merge.each do |f|
    if File.exists?(f)
      begin
        copy.addDocument(@pdfreader.new(f))
      rescue => e
        failure_list << f
        log "PDF::Merger: Invalid PDF: #{f}"            
      end
    else
      failure_list << f
      log "PDF::Merger: File does not exist: #{f}"
    end
  end
  
  if @files_to_merge.size - failure_list.size > 0
    copy.addJavaScript(@js) if @js && !@js.empty?
    copy.close()
    @pdfreader.new(output_file_path).getNumberOfPages
  else
    0
  end
end