C++ SXMPMeta::CountArrayItems方法代码示例

static void ExportIPTC_Array ( const SXMPMeta & xmp, IPTC_Manager * iptc,
							   const char * xmpNS, const char * xmpProp, XMP_Uns8 id )
{
	std::string    value;
	XMP_OptionBits xmpFlags;

	bool found = xmp.GetProperty ( xmpNS, xmpProp, 0, &xmpFlags );
	if ( ! found ) {
		iptc->DeleteDataSet ( id );
		return;
	}

	if ( ! XMP_PropIsArray ( xmpFlags ) ) return;	// ? Complain? Delete the DataSet?

	XMP_Index xmpCount  = xmp.CountArrayItems ( xmpNS, xmpProp );
	XMP_Index iptcCount = (XMP_Index) iptc->GetDataSet ( id, 0 );

	if ( xmpCount != iptcCount ) iptc->DeleteDataSet ( id );

	for ( XMP_Index ds = 0; ds < xmpCount; ++ds ) {	// ! XMP arrays are indexed from 1, IPTC from 0.

		(void) xmp.GetArrayItem ( xmpNS, xmpProp, ds+1, &value, &xmpFlags );
		if ( ! XMP_PropIsSimple ( xmpFlags ) ) continue;	// ? Complain?

		NormalizeToCR ( &value );

		iptc->SetDataSet_UTF8 ( id, value.c_str(), (XMP_Uns32)value.size(), ds );	// ! Appends if necessary.

	}

}	// ExportIPTC_Array

static void ExportIPTC_SubjectCode ( const SXMPMeta & xmp, IPTC_Manager * iptc )
{
	std::string    xmpValue, iimValue;
	XMP_OptionBits xmpFlags;

	bool found = xmp.GetProperty ( kXMP_NS_IPTCCore, "SubjectCode", 0, &xmpFlags );
	if ( ! found ) {
		iptc->DeleteDataSet ( kIPTC_SubjectCode );
		return;
	}

	if ( ! XMP_PropIsArray ( xmpFlags ) ) return;	// ? Complain? Delete the DataSet?

	XMP_Index xmpCount  = xmp.CountArrayItems ( kXMP_NS_IPTCCore, "SubjectCode" );
	XMP_Index iptcCount = (XMP_Index) iptc->GetDataSet ( kIPTC_SubjectCode, 0 );

	if ( xmpCount != iptcCount ) iptc->DeleteDataSet ( kIPTC_SubjectCode );

	for ( XMP_Index ds = 0; ds < xmpCount; ++ds ) {	// ! XMP arrays are indexed from 1, IPTC from 0.

		(void) xmp.GetArrayItem ( kXMP_NS_IPTCCore, "SubjectCode", ds+1, &xmpValue, &xmpFlags );
		if ( ! XMP_PropIsSimple ( xmpFlags ) ) continue;	// ? Complain?
		if ( xmpValue.size() != 8 ) continue;	// ? Complain?

		iimValue = "IPTC:";
		iimValue += xmpValue;
		iimValue += ":::";	// Add the separating colons for the empty name portions.

		iptc->SetDataSet_UTF8 ( kIPTC_SubjectCode, iimValue.c_str(), (XMP_Uns32)iimValue.size(), ds );	// ! Appends if necessary.

	}

}	// ExportIPTC_SubjectCode

/**
*	Initializes the toolkit and attempts to open a file for reading metadata.  Initially
* an attempt to open the file is done with a handler, if this fails then the file is opened with
* packet scanning. Once the file is open several properties are read and displayed in the console.  
* The XMP object is then dumped to a text file and the resource file is closed.
*/
int main ( int argc, const char * argv[] )
{
	if ( argc != 2 ) // 2 := command and 1 parameter
	{
		cout << "usage: ReadingXMP (filename)" << endl;
		return 0;
	}
	
	string filename = string( argv[1] );

	if(!SXMPMeta::Initialize())
	{
		cout << "Could not initialize toolkit!";
		return -1;
	}
	
	// Must initialize SXMPFiles before we use it
	if ( ! SXMPFiles::Initialize() )
	{
		cout << "Could not initialize SXMPFiles.";
		return -1;
	}
	
	try
	{
		// Options to open the file with - read only and use a file handler
		XMP_OptionBits opts = kXMPFiles_OpenForRead | kXMPFiles_OpenUseSmartHandler;

		bool ok;
		SXMPFiles myFile;			
		std::string status = "";

		// First we try and open the file
		ok = myFile.OpenFile(filename, kXMP_UnknownFile, opts);
		if( ! ok )
		{
			status += "No smart handler available for " + filename + "\n";
			status += "Trying packet scanning.\n";

			// Now try using packet scanning
			opts = kXMPFiles_OpenForUpdate | kXMPFiles_OpenUsePacketScanning;
			ok = myFile.OpenFile(filename, kXMP_UnknownFile, opts);
		}


		// If the file is open then read the metadata
		if(ok)
		{
			cout << status << endl;
			cout << filename << " is opened successfully" << endl;
			// Create the xmp object and get the xmp data
			SXMPMeta meta;
			myFile.GetXMP(&meta);

			bool exists;

			// Read a simple property
			string simpleValue;  //Stores the value for the property
			exists = meta.GetProperty(kXMP_NS_XMP, "CreatorTool", &simpleValue, NULL);
			if(exists)
				cout << "CreatorTool = " << simpleValue << endl;
			else
				simpleValue.clear();

			// Get the first element in the dc:creator array
			string elementValue;
			exists = meta.GetArrayItem(kXMP_NS_DC, "creator", 1, &elementValue, NULL);
			if(exists)
				cout << "dc:creator = " << elementValue << endl;
			else
				elementValue.clear();

			// Get the the entire dc:subject array 
			string propValue;
			int arrSize = meta.CountArrayItems(kXMP_NS_DC, "subject");
			for(int i = 1; i <= arrSize;i++)
			{
				meta.GetArrayItem(kXMP_NS_DC, "subject", i, &propValue, 0);
				cout << "dc:subject[" << i << "] = " << propValue << endl;
			}

			// Get the dc:title for English and French
			string itemValue;
			string actualLang;
			meta.GetLocalizedText(kXMP_NS_DC, "title", "en", "en-US", NULL, &itemValue, NULL);
			cout << "dc:title in English = " << itemValue << endl;

			meta.GetLocalizedText(kXMP_NS_DC, "title", "fr", "fr-FR", NULL, &itemValue, NULL);
			cout << "dc:title in French = " << itemValue << endl;

			// Get dc:MetadataDate
			XMP_DateTime myDate;
			if(meta.GetProperty_Date(kXMP_NS_XMP, "MetadataDate", &myDate, NULL))
			{
//.........这里部分代码省略.........