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#ifndef Pegasus_ContentLanguageList_h
#define Pegasus_ContentLanguageList_h

#include <Pegasus/Common/Config.h>
#include <Pegasus/Common/LanguageTag.h>

PEGASUS_NAMESPACE_BEGIN

class ContentLanguageListRep;

//////////////////////////////////////////////////////////////
//
// ContentLanguageList
//
//////////////////////////////////////////////////////////////

/**
    This class represents a list of content languages (such as may appear
    in an HTTP Content-Language header value).  It is managed as a list of
    LanguageTag objects.
 */
class PEGASUS_COMMON_LINKAGE ContentLanguageList
{
public:

    /**
        Constructs an empty ContentLanguageList object.
     */
    ContentLanguageList();

    /**
        Copy constructor.
        @param contentLanguages The ContentLanguageList object to copy.
     */
    ContentLanguageList(const ContentLanguageList& contentLanguages);

    /**
        Destructor.
     */
    ~ContentLanguageList();

    /**
        Assignment operator.
        @param contentLanguages The ContentLanguageList object to copy.
     */
    ContentLanguageList& operator=(const ContentLanguageList& contentLanguages);

    /**
        Returns the number of LanguageTags in the ContentLanguageList object.
        @return Integer size of the ContentLanguageList list.
     */
    Uint32 size() const;

    /**
        Accesses a LanguageTag at a specified index.
        @param index Integer index of the LanguageTag to access.
        Valid indices range from 0 to size()-1.
        @return The LanguageTag corresponding to the specified index.
        @exception IndexOutOfBoundsException If the specified index is out of
        range.
     */
    LanguageTag getLanguageTag(Uint32 index) const;

    /**
        Appends a LanguageTag to the ContentLanguageList object.
        @param languageTag The LanguageTag to append.
     */
    void append(const LanguageTag& languageTag);

    /**
        Removes the specified LanguageTag from the ContentLanguageList object.
        @param index Integer index of the LanguageTag to remove.
        @exception IndexOutOfBoundsException If the specified index is out of
        range.
     */
    void remove(Uint32 index);

    /**
        Finds the specified LanguageTag in the ContentLanguageList object and
        returns its index.
        @param languageTag The LanguageTag to find.
        @return Integer index of the LanguageTag, if found; otherwise
        PEG_NOT_FOUND.
     */
    Uint32 find(const LanguageTag& languageTag) const;

    /**
        Removes all the LanguageTags from the ContentLanguageList object.
     */
    void clear();

    /**
        Tests ContentLanguageList objects for equality.
        @param contentLanguages A ContentLanguageList object to be compared.
        @return True if the ContentLanguageList objects contain the same
        LanguageTags in the same order, false otherwise.
     */
    Boolean operator==(const ContentLanguageList& contentLanguages) const;

    /**
        Tests ContentLanguageList objects for inequality.
        @param contentLanguages A ContentLanguageList object to be compared.
        @return False if the ContentLanguageList objects contain the same
        LanguageTags in the same order, true otherwise.
     */
    Boolean operator!=(const ContentLanguageList& contentLanguages) const;

private:
    ContentLanguageListRep *_rep;
};

PEGASUS_NAMESPACE_END

#endif