Package com.adobe.internal.pdftoolkit.core.filter

Class FilterStream

java.lang.Object

com.adobe.internal.pdftoolkit.core.filter.FilterStream

public class FilterStream
extends Object

Constructor Summary

Constructors

Constructor	Description
FilterStream()

Method Summary

Modifier and Type	Method	Description
static InputStream	applyFilter(InputStream srcStm, ASName curFilter, FilterParams params)	Apply a named input filter to the stream.
static InputStream	applyFilter(InputStream inStm, ASName filterName, FilterParams params, CustomFilterRegistry filterRegistry)	Apply a named input filter to the stream.A PDFCosParseException is thrown for filter names that are not supported or incorrect.
static OutputStream	applyFilter(OutputStream inStm, ASName filterName, FilterParams params)	Apply a named output filter to the stream.
static OutputStream	applyFilter(OutputStream inStm, ASName filterName, FilterParams params, CustomFilterRegistry filterRegistry)	Apply a named output filter to the stream.
static FilterParams	buildFilterParams(CosObject parmsObj)	Build a suitable FilterParams class from the contents of the DecodeParms field of CosStream.
static FilterParams	buildFilterParams(ASObject parmsObj)	Build a suitable FilterParams class from the contents of the DecodeParms field of an inline image's image dict.
static CosObject	updateCustomFilterParams(ASName filterName, CosObject params, CustomFilterRegistry filterRegistry)	Checks if the filter is a custom encode filter and then updates the filterParams based on functionality available to the custom encode filter
static ASDictionary	updateCustomFilterParams(ASName filterName, ASDictionary params, CustomFilterRegistry filterRegistry)	Checks if the filter is a custom encode filter and then updates the filterParams based on functionality available to the custom encode filter

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

FilterStream

public FilterStream()

Method Details

buildFilterParams

public static FilterParams buildFilterParams(CosObject parmsObj)
                                      throws PDFCosParseException,
PDFIOException,
PDFSecurityException

Build a suitable FilterParams class from the contents of the DecodeParms field of CosStream. The collection of all parameters from the dictionary or array of dictionaries is merged into the FilterParams object.

Parameters:

parmsObj -

Throws:

PDFCosParseException

PDFIOException

PDFSecurityException

buildFilterParams

public static FilterParams buildFilterParams(ASObject parmsObj)
                                      throws PDFInvalidParameterException

Build a suitable FilterParams class from the contents of the DecodeParms field of an inline image's image dict. The collection of all parameters from the dictionary or array of dictionaries is merged into the FilterParams object.

Parameters:

parmsObj -

Throws:

PDFInvalidParameterException

applyFilter

public static InputStream applyFilter(InputStream inStm,
 ASName filterName,
 FilterParams params,
 CustomFilterRegistry filterRegistry)
                               throws PDFCosParseException,
IOException

Apply a named input filter to the stream.A PDFCosParseException is thrown for filter names that are not supported or incorrect. To support valid filters, the user can register their filter encoders/decoders with the PDFFilterRegistry as a document open option and they will be used or the client can extract the stream content directly.

Parameters:

inStm -

filterName -

params -

filterRegistry -

Returns:

decoded bytes in an inputStream

Throws:

PDFCosParseException

IOException

applyFilter

public static OutputStream applyFilter(OutputStream inStm,
 ASName filterName,
 FilterParams params,
 CustomFilterRegistry filterRegistry)
                                throws PDFCosParseException

Apply a named output filter to the stream.

Throws:

PDFCosParseException - if we get a junk filter name. There are valid filters (like DCTDecode for images) that we really don't support, but there's no way to get here with those unless the client tries to extract the stream content directly.

applyFilter

public static InputStream applyFilter(InputStream srcStm,
 ASName curFilter,
 FilterParams params)
                               throws PDFCosParseException,
IOException

Apply a named input filter to the stream.

Throws:

PDFCosParseException - if we get a junk filter name. There are valid filters that we really don't support, but there's no way to get here with those unless the client tries to extract the stream content directly.

IOException

applyFilter

public static OutputStream applyFilter(OutputStream inStm,
 ASName filterName,
 FilterParams params)
                                throws PDFCosParseException

Apply a named output filter to the stream.

Throws:

PDFCosParseException - if we get a junk filter name. There are valid filters (like DCTDecode for images) that we really don't support, but there's no way to get here with those unless the client tries to extract the stream content directly.

updateCustomFilterParams

public static CosObject updateCustomFilterParams(ASName filterName,
 CosObject params,
 CustomFilterRegistry filterRegistry)
                                          throws PDFCosParseException,
PDFIOException,
PDFSecurityException

Checks if the filter is a custom encode filter and then updates the filterParams based on functionality available to the custom encode filter

Parameters:

filterName -

params -

filterRegistry -

Returns:

a CosObject representing an new updated filterParam

Throws:

PDFCosParseException

PDFIOException

PDFSecurityException

updateCustomFilterParams

public static ASDictionary updateCustomFilterParams(ASName filterName,
 ASDictionary params,
 CustomFilterRegistry filterRegistry)
                                             throws PDFInvalidParameterException

Checks if the filter is a custom encode filter and then updates the filterParams based on functionality available to the custom encode filter

Parameters:

filterName -

params -

filterRegistry -

Returns:

an ASDictionary representing an new updated filterParam

Throws:

PDFInvalidParameterException