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## com.lowagie.text.pdf
Class PdfSmartCopy

    java.lang.Object
      com.lowagie.text.DocWriter
          com.lowagie.text.pdf.PdfWriter
              com.lowagie.text.pdf.PdfCopy
                  com.lowagie.text.pdf.PdfSmartCopy

All Implemented Interfaces:
  DocListener, ElementListener, PdfAnnotations, PdfDocumentActions, PdfEncryptionSettings, PdfPageActions, PdfRunDirection, PdfVersion, PdfViewerPreferences, PdfXConformance, EventListener

    public class PdfSmartCopy

extends PdfCopy

PdfSmartCopy has the same functionality as PdfCopy, but when resources (such as fonts, images,...) are encountered, a reference to these resources is saved in a cache, so that they can be reused. This requires more memory, but reduces the file size of the resulting PDF document.

Nested Class Summary
`(package private) static class` | `PdfSmartCopy.ByteStore`

Nested classes/interfaces inherited from class com.lowagie.text.pdf.PdfCopy
`PdfCopy.IndirectReferences, PdfCopy.PageStamp, PdfCopy.RefKey, PdfCopy.StampContent`

Nested classes/interfaces inherited from class com.lowagie.text.pdf.PdfWriter
`PdfWriter.PdfBody, PdfWriter.PdfTrailer`

Field Summary
`private HashMap` | `streamMap` the cache with the streams and references.

Fields inherited from class com.lowagie.text.pdf.PdfCopy
`acroForm, currentObjectNum, fieldArray, fieldTemplates, indirectMap, indirects, namePtr, reader`

Fields inherited from class com.lowagie.text.pdf.PdfWriter
`ALLOW_ASSEMBLY, ALLOW_COPY, ALLOW_DEGRADED_PRINTING, ALLOW_FILL_IN, ALLOW_MODIFY_ANNOTATIONS, ALLOW_MODIFY_CONTENTS, ALLOW_PRINTING, ALLOW_SCREENREADERS, AllowAssembly, AllowCopy, AllowDegradedPrinting, AllowFillIn, AllowModifyAnnotations, AllowModifyContents, AllowPrinting, AllowScreenReaders, body, CenterWindow, colorNumber, compressionLevel, crypto, currentPageNumber, currentPdfReaderInstance, defaultColorspace, DID_PRINT, DID_SAVE, directContent, directContentUnder, DirectionL2R, DirectionR2L, DisplayDocTitle, DO_NOT_ENCRYPT_METADATA, DOCUMENT_CLOSE, documentColors, documentExtGState, documentFonts, documentOCG, documentOCGorder, documentPatterns, documentProperties, documentShadingPatterns, documentShadings, documentSpotPatterns, EMBEDDED_FILES_ONLY, ENCRYPTION_AES_128, ENCRYPTION_MASK, extraCatalog, FitWindow, fontNumber, formXObjects, formXObjectsCounter, fullCompression, GENERATION_MAX, group, HideMenubar, HideToolbar, HideWindowUI, imageDictionary, importedPages, JBIG2Globals, newBookmarks, NO_SPACE_CHAR_RATIO, NonFullScreenPageModeUseNone, NonFullScreenPageModeUseOC, NonFullScreenPageModeUseOutlines, NonFullScreenPageModeUseThumbs, OCGLocked, OCGRadioGroup, OCProperties, PAGE_CLOSE, PAGE_OPEN, PageLayoutOneColumn, PageLayoutSinglePage, PageLayoutTwoColumnLeft, PageLayoutTwoColumnRight, PageLayoutTwoPageLeft, PageLayoutTwoPageRight, PageModeFullScreen, PageModeUseAttachments, PageModeUseNone, PageModeUseOC, PageModeUseOutlines, PageModeUseThumbs, pageReferences, patternColorspaceCMYK, patternColorspaceGRAY, patternColorspaceRGB, patternNumber, pdf, pdf_version, PDF_VERSION_1_2, PDF_VERSION_1_3, PDF_VERSION_1_4, PDF_VERSION_1_5, PDF_VERSION_1_6, PDF_VERSION_1_7, PDFA1A, PDFA1B, PDFX1A2001, PDFX32002, PDFXNONE, prevxref, PrintScalingNone, root, RUN_DIRECTION_DEFAULT, RUN_DIRECTION_LTR, RUN_DIRECTION_NO_BIDI, RUN_DIRECTION_RTL, runDirection, SIGNATURE_APPEND_ONLY, SIGNATURE_EXISTS, SPACE_CHAR_RATIO_DEFAULT, STANDARD_ENCRYPTION_128, STANDARD_ENCRYPTION_40, STRENGTH128BITS, STRENGTH40BITS, structureTreeRoot, tabs, tagged, userunit, VERSION_1_2, VERSION_1_3, VERSION_1_4, VERSION_1_5, VERSION_1_6, VERSION_1_7, WILL_PRINT, WILL_SAVE, xmpMetadata`

Fields inherited from class com.lowagie.text.DocWriter
`closeStream, document, EQUALS, FORWARD, GT, LT, NEWLINE, open, os, pageSize, pause, QUOTE, SPACE, TAB`

Constructor Summary
`PdfSmartCopy(Document document, OutputStream os)` Creates a PdfSmartCopy instance.

Method Summary
`protected PdfIndirectReference` | `copyIndirect(PRIndirectReference in)` Translate a PRIndirectReference to a PdfIndirectReference In addition, translates the object numbers, and copies the referenced object to the output file if it wasn't available in the cache yet.

Methods inherited from class com.lowagie.text.pdf.PdfCopy
`add, add, addAnnotation, addPage, addPage, close, copyAcroForm, copyArray, copyDictionary, copyObject, copyStream, createPageStamp, freeReader, getCatalog, getImportedPage, isRotateContents, setFromIPage, setFromReader, setRotateContents`

Methods inherited from class com.lowagie.text.pdf.PdfWriter
`add, add, addAnnotation, addCalculationOrder, addDeveloperExtension, addDirectImageSimple, addDirectImageSimple, addDirectTemplateSimple, addFileAttachment, addFileAttachment, addFileAttachment, addJavaScript, addJavaScript, addJavaScript, addJavaScript, addJavaScript, addJavaScript, addLocalDestinations, addNamedDestination, addNamedDestinations, addOCGRadioGroup, addSharedObjectsToBody, addSimple, addSimple, addSimpleExtGState, addSimplePattern, addSimplePatternColorspace, addSimpleProperty, addSimpleShading, addSimpleShadingPattern, addToBody, addToBody, addToBody, addToBody, addToBody, addToBody, addViewerPreference, clearTextWrap, createXmpMetadata, eliminateFontSubset, fillOCProperties, fitsPage, fitsPage, getAcroForm, getBoxSize, getColorspaceName, getCompressionLevel, getCurrentDocumentSize, getCurrentPage, getCurrentPageNumber, getDefaultColorspace, getDirectContent, getDirectContentUnder, getEncryption, getExtraCatalog, getGroup, getImageReference, getIndirectReferenceNumber, getInfo, getInstance, getInstance, getNewObjectNumber, getOCProperties, getOs, getPageEvent, getPageNumber, getPageReference, getPageSize, getPdfDocument, getPdfIndirectReference, getPdfVersion, getPDFXConformance, getReaderFile, getReferenceJBIG2Globals, getRootOutline, getRunDirection, getSpaceCharRatio, getStructureTreeRoot, getTabs, getUserunit, getVerticalPosition, isFullCompression, isPageEmpty, isPdfX, isRgbTransparencyBlending, isStrictImageSequence, isTagged, isUserProperties, lockLayer, open, propertyExists, registerLayer, releaseTemplate, reorderPages, resetContent, setAdditionalAction, setAtLeastPdfVersion, setBoxSize, setCollection, setCompressionLevel, setCropBoxSize, setDefaultColorspace, setDuration, setEncryption, setEncryption, setEncryption, setEncryption, setEncryption, setFullCompression, setGroup, setInitialLeading, setLinearPageMode, setOpenAction, setOpenAction, setOutlines, setOutputIntents, setOutputIntents, setOutputIntents, setPageAction, setPageEmpty, setPageEvent, setPageLabels, setPageXmpMetadata, setPdfVersion, setPdfVersion, setPDFXConformance, setRgbTransparencyBlending, setRunDirection, setSigFlags, setSpaceCharRatio, setStrictImageSequence, setTabs, setTagged, setThumbnail, setTransition, setUserProperties, setUserunit, setViewerPreferences, setXmpMetadata, writeOutlines`

Methods inherited from class com.lowagie.text.DocWriter
`add, addTabs, flush, getISOBytes, isCloseStream, isPaused, newPage, pause, resetFooter, resetHeader, resetPageCount, resume, setCloseStream, setFooter, setHeader, setMarginMirroring, setMarginMirroringTopBottom, setMargins, setPageCount, setPageSize, write, write, writeEnd, writeEnd, writeMarkupAttributes, writeStart`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### streamMap

    private HashMap streamMap

  the cache with the streams and references.

Constructor Detail

### PdfSmartCopy

    public PdfSmartCopy(Document document,
                        OutputStream os)
                 throws DocumentException

  Creates a PdfSmartCopy instance.

  Throws:
    `DocumentException`

Method Detail

### copyIndirect

    protected PdfIndirectReference copyIndirect(PRIndirectReference in)
                                         throws IOException,
                                                BadPdfFormatException

  Translate a PRIndirectReference to a PdfIndirectReference In addition, translates the object numbers, and copies the referenced object to the output file if it wasn't available in the cache yet. If it's in the cache, the reference to the already used stream is returned. NB: PRIndirectReferences (and PRIndirectObjects) really need to know what file they came from, because each file has its own namespace. The translation we do from their namespace to ours is *at best* heuristic, and guaranteed to fail under some circumstances.

  Overrides:
    `copyIndirect` in class `PdfCopy`
  Throws:
    `IOException`
    `BadPdfFormatException`

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