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authortoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
committertoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
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+<HTML>
+<HEAD>
+ <TITLE> DwParameter Man Page </TITLE>
+</HEAD>
+<BODY BGCOLOR="#FFFFFF">
+<H2>
+ <FONT COLOR="navy"> NAME </FONT>
+</H2>
+<P>
+DwParameter -- Class representing a MIME field body parameter
+<H2>
+ <FONT COLOR="navy"> SYNOPSIS </FONT>
+</H2>
+<PRE>class DW_EXPORT DwParameter : public <A HREF="msgcmp.html">DwMessageComponent</A> {
+
+ friend class DwMediaType;
+
+public:
+
+ <A HREF="param.html#DwParameter">DwParameter</A>();
+ <A HREF="param.html#DwParameter">DwParameter</A>(const DwParameter&amp; aParam);
+ <A HREF="param.html#DwParameter">DwParameter</A>(const DwString&amp; aStr, DwMessageComponent* aParent=0);
+ virtual ~DwParameter();
+ const DwParameter&amp; <A HREF="param.html#op_eq">operator =</A> (const DwParameter&amp; aParam);
+ virtual void <A HREF="param.html#Parse">Parse</A>();
+ virtual void <A HREF="param.html#Assemble">Assemble</A>();
+ virtual DwMessageComponent* <A HREF="param.html#Clone">Clone</A>() const;
+ const DwString&amp; <A HREF="param.html#Attribute">Attribute</A>() const;
+ void <A HREF="param.html#SetAttribute">SetAttribute</A>(const DwString&amp; aAttribute);
+ const DwString&amp; <A HREF="param.html#Value">Value</A>() const;
+ void <A HREF="param.html#SetValue">SetValue</A>(const DwString&amp; aValue);
+ DwParameter* <A HREF="param.html#Next">Next</A>() const ;
+ void <A HREF="param.html#SetNext">SetNext</A>(DwParameter* aParam);
+ static DwParameter* <A HREF="param.html#NewParameter">NewParameter</A>(const DwString&amp; aStr,
+ DwMessageComponent* aParent);
+ static DwParameter* (*<A HREF="param.html#sNewParameter">sNewParameter</A>)(const DwString&amp;, DwMessageComponent*);
+
+public:
+
+ virtual void <A HREF="param.html#PrintDebugInfo">PrintDebugInfo</A>(ostream&amp; aStrm, int aDepth=0) const;
+ virtual void <A HREF="param.html#CheckInvariants">CheckInvariants</A>() const;
+
+protected:
+
+ void _PrintDebugInfo(ostream&amp; aStrm) const;
+};
+</PRE>
+<H2>
+ <FONT COLOR="navy"> DESCRIPTION </FONT>
+</H2>
+<P>
+<B><TT>DwParameter</TT></B> represents the <I>parameter</I> component of
+the Content-Type header field as described in RFC-2045. A parameter consists
+of an attribute/value pair. <B><TT>DwParameter</TT></B> has member functions
+for getting or setting a parameter's attribute and value.
+<P>
+A <B><TT>DwParameter</TT></B> object may be included in a list of
+<B><TT>DwParameter</TT></B> objects. You can get the next
+<B><TT>DwParameter</TT></B> object in the list by calling the member function
+<B><TT>Next()</TT></B>.
+<H2>
+ <FONT COLOR="navy"> Public Member Functions </FONT>
+</H2>
+<P>
+<FONT COLOR="teal"><B> <A NAME="DwParameter">DwParameter</A>() <BR>
+DwParameter(const DwParameter&amp; aParam) <BR>
+DwParameter(const DwString&amp; aStr, DwMessageComponent* aParent=0)
+</B></FONT>
+<P>
+The first constructor is the default constructor, which sets the
+<B><TT>DwParameter</TT></B> object's string representation to the empty string
+and sets its parent to NULL.
+<P>
+The second constructor is the copy constructor, which copies the string
+representation, attribute, and value from <B><TT>aParam</TT></B>. The parent
+of the new <B><TT>DwParameter</TT></B> object is set to NULL.
+<P>
+The third constructor copies <B><TT>aStr</TT></B> to the
+<B><TT>DwParameter</TT></B> object's string representation and sets
+<B><TT>aParent</TT></B> as its parent. The virtual member function
+<B><TT>Parse()</TT></B> should be called immediately after this constructor
+in order to parse the string representation. Unless it is NULL,
+<B><TT>aParent</TT></B> should point to an object of a class derived from
+<B><TT>DwMediaType</TT></B>.
+<P>
+<FONT COLOR="teal"><B> const DwParameter&amp; <A NAME="op_eq">operator =</A>
+(const DwParameter&amp; aParam) </B></FONT>
+<P>
+This is the assignment operator.
+<P>
+<FONT COLOR="teal"><B> virtual void <A NAME="Parse">Parse</A>() </B></FONT>
+<P>
+This virtual function, inherited from <B><TT>DwMessageComponent</TT></B>,
+executes the parse method for <B><TT>DwParameter</TT></B> objects. It should
+be called immediately after the string representation is modified and before
+the parts of the broken-down representation are accessed.
+<P>
+<FONT COLOR="teal"><B> virtual void <A NAME="Assemble">Assemble</A>()
+</B></FONT>
+<P>
+This virtual function, inherited from <B><TT>DwMessageComponent</TT></B>,
+executes the assemble method for <B><TT>DwParameter</TT></B> objects. It
+should be called whenever one of the object's attributes is changed in order
+to assemble the string representation from its broken-down representation.
+It will be called automatically for this object by the parent object's
+<B><TT>Assemble()</TT></B> member function if the is-modified flag is set.
+<P>
+<FONT COLOR="teal"><B> virtual DwMessageComponent*
+<A NAME="Clone">Clone</A>() const </B></FONT>
+<P>
+This virtual function, inherited from <B><TT>DwMessageComponent</TT></B>,
+creates a new <B><TT>DwParameter</TT></B> on the free store that has the
+same value as this <B><TT>DwParameter</TT></B> object. The basic idea is
+that of a ``virtual copy constructor.''
+<P>
+<FONT COLOR="teal"><B> const DwString&amp;
+<A NAME="Attribute">Attribute</A>() const </B></FONT>
+<P>
+Returns the attribute contained by this parameter.
+<P>
+<FONT COLOR="teal"><B> void <A NAME="SetAttribute">SetAttribute</A>(const
+DwString&amp; aAttribute) </B></FONT>
+<P>
+Sets the attribute contained by this parameter.
+<P>
+<FONT COLOR="teal"><B> const DwString&amp; <A NAME="Value">Value</A>() const
+</B></FONT>
+<P>
+Returns the value contained by this parameter.
+<P>
+<FONT COLOR="teal"><B> void <A NAME="SetValue">SetValue</A>(const DwString&amp;
+aValue) </B></FONT>
+<P>
+Sets the value contained by this parameter.
+<P>
+<FONT COLOR="teal"><B> DwParameter* <A NAME="Next">Next</A>() const
+</B></FONT>
+<P>
+Returns the next <B><TT>DwParameter</TT></B> object in the list.
+<P>
+<FONT COLOR="teal"><B> void <A NAME="SetNext">SetNext</A>(DwParameter* aParam)
+</B></FONT>
+<P>
+Returns the next <B><TT>DwParameter</TT></B> object in the list. Since
+<B><TT>DwMediaType</TT></B> has member functions for adding
+<B><TT>DwParameter</TT></B> objects to its list, you should avoid using this
+function.
+<P>
+<FONT COLOR="teal"><B> static DwParameter*
+<A NAME="NewParameter">NewParameter</A>(const DwString&amp; aStr,
+DwMessageComponent* aParent) </B></FONT>
+<P>
+Creates a new <B><TT>DwParameter</TT></B> object on the free store. If the
+static data member <B><TT>sNewParameter</TT></B> is NULL, this member function
+will create a new <B><TT>DwParameter</TT></B> and return it. Otherwise,
+<B><TT>NewParameter()</TT></B> will call the user-supplied function pointed
+to by <B><TT>sNewParameter</TT></B>, which is assumed to return an object
+from a class derived from <B><TT>DwParameter</TT></B>, and return that object.
+<P>
+<FONT COLOR="teal"><B> virtual void
+<A NAME="PrintDebugInfo">PrintDebugInfo</A>(ostream&amp; aStrm, int aDepth=0)
+const </B></FONT>
+<P>
+This virtual function, inherited from <B><TT>DwMessageComponent</TT></B>,
+prints debugging information about this object to <B><TT>aStrm</TT></B>.
+It will also call <B><TT>PrintDebugInfo()</TT></B> for any of its child
+components down to a level of <B><TT>aDepth</TT></B>.
+<P>
+This member function is available only in the debug version of the library.
+<P>
+<FONT COLOR="teal"><B> virtual void
+<A NAME="CheckInvariants">CheckInvariants</A>() const </B></FONT>
+<P>
+Aborts if one of the invariants of the object fails. Use this member function
+to track down bugs.
+<P>
+This member function is available only in the debug version of the library.
+<H2>
+ <FONT COLOR="navy"> Public Data Members </FONT>
+</H2>
+<P>
+<FONT COLOR="teal"><B> static DwParameter*
+(*<A NAME="sNewParameter">sNewParameter</A>)(const DwString&amp;,
+DwMessageComponent*) </B></FONT>
+<P>
+If <B><TT>sNewParameter</TT></B> is not NULL, it is assumed to point to a
+user-supplied function that returns an object from a class derived from
+<B><TT>DwParameter</TT></B>.
+</BODY></HTML>