> $ apt-cache show pdftk > ... > If PDF is electronic paper, then pdftk is an electronic stapler-remover, > hole-punch, binder, secret-decoder-ring, and X-Ray-glasses. Pdftk is a > simple tool for doing everyday things with PDF documents.
And pdftk itself uses the handy Java iText libraries for actual PDF composition/decomposition. iText can specifically address the author's desire to modify PDF content inline. And if you don't want to use run-time Java interpreting, you can copy pdftk's technique of precompiling to native code using gjc.
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