Module: PkernelJce::JFile

Defined in:
lib/pkernel_jce/jfile.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.absolute_path(file) ⇒ Object

create_temp_file



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# File 'lib/pkernel_jce/jfile.rb', line 12

def JFile.absolute_path(file)
  if file.nil?
    raise PkernelJce::Error, "Cannot get absolute path for file is nil"
  else
    file.absolute_path
  end
end

.copy(src, dest, opts = { }, &block) ⇒ Object

equals?

Raises:



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# File 'lib/pkernel_jce/jfile.rb', line 61

def JFile.copy(src,dest,opts = { },&block)
  raise PkernelJce::Error, "Source cannot be nil or empty" if src.nil? or src.empty?
  raise PkernelJce::Error, "Destination cannot be nil" if dest.nil?
 
  if src.is_a?(java.io.InputStream)
    src = src
    srcLength = src.length
  elsif src.is_a?(String)
    # assume is file path?
    f = java.io.File.new(src)
    raise PkernelJce::Error, "Given file doesn't exist [#{f.absolute_path}]" if not f.exists
    raise PkernelJce::Error, "Cannot read source file from a directory [#{f.absolute_path}]" if f.is_directory?
    src = java.io.FileInputStream.new(f)
    srcLength = f.length
  else
    raise PkernelJce::Error, "Unsupported source file type #{src.class}"
  end

  if dest.is_a?(java.io.OutputStream)
    PkernelJce::GConf.instance.glog.debug "Given dest is an OutputStream. Direct use the object."
    os = dest
  elsif dest.is_a?(String)
    # assume is file path?
    f = java.io.File.new(dest)
    raise PkernelJce::Error, "Cannot write dest to a directory [#{f.absolute_path}]" if f.is_directory?
    
    PkernelJce::GConf.instance.glog.debug "Opening given path #{f.absolute_path} to copy file into"
    os = java.io.FileOutputStream.new(f)
    
  else
    raise PkernelJce::Error, "Unsupported destination type #{dest.class}"
  end

  bufSize = opts[:bufSize] || 1024000
  b = Java::byte[bufSize].new
  totalWritten = 0
  while((read = src.read(b,0,b.length)) != -1)
    if block
      block.call(:before_write, { buf: b, from: 0, len: read })
    end
    
    os.write(b,0,read)  

    totalWritten += read
    if block
      block.call(:progress, { total: srcLength, written: read, processed: totalWritten })
    end
  end
  
end

.create_temp_file(opts = { }) ⇒ Object 



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# File 'lib/pkernel_jce/jfile.rb', line 5

def JFile.create_temp_file(opts = { })
  prefix = opts[:prefix]
  suffix = opts[:suffix]
  dir = opts[:directory]
  java.io.File.createTempFile(prefix,suffix,dir)
end

.equal?(*files, &block) ⇒ Boolean

absolute_path

Returns:

  • (Boolean) 


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# File 'lib/pkernel_jce/jfile.rb', line 20

def JFile.equal?(*files,&block)
  if files.length > 1
    
    if block
      bufLen = block.call(:bufLen)
    end
    bufLen = bufLen || 102400

    equal = false
    result = nil
    md = java.security.MessageDigest.getInstance("SHA256")
    files.each do |f|
      ff = java.io.File.new(f)  
      if ff.exist?
        buf = Java::byte[bufLen].new
        fis = java.io.FileInputStream.new(ff)
        while((read = fis.read(buf,0,buf.length)) != -1)
          md.update(buf,0,read)
        end
        res = md.digest
        if result.nil?
          result = res
        elsif not java.util.Arrays.is_equals(res, result)
          equal = false
          break
        else
          result = res
        end
        
        md.reset
      else
        raise PkernelJce::Error, "Given file to compare equal '#{f}' does not exist"
      end
    end

    equal
  else
    true
  end
end

Instance Method Details

#to_memory(file, opts = { }, &block) ⇒ Object

copy

Raises:



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# File 'lib/pkernel_jce/jfile.rb', line 112

def to_memory(file, opts = { }, &block) 
  raise PkernelJce::Error, "No file given" if file.nil?
  f = java.io.File.new(file)
  raise PkernelJce::Error, "Given file #{f.absolute_path} does not exist" if not f.exists
  raise PkernelJce::Error, "Given file #{f.absolute_path} is a directory" if f.directory?

  total = f.length
  bufSize = opts[:bufSize] || 1024000
  b = Java::byte[bufSize].new
  baos = java.io.ByteArrayOutputStream.new
  processed = 0
  fis = java.io.FileInputStream.new(f)
  while((read = fis.read(b,0,b.length)) != -1)
    baos.write(b,0,read)
    processed += read

    block.call(:progress, { total: total, processed: processed, wwritten: read }) if block
  end

  baos.toByteArray
end