You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
190 lines
7.8 KiB
190 lines
7.8 KiB
<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& aParam);
|
|
<A HREF="param.html#DwParameter">DwParameter</A>(const DwString& aStr, DwMessageComponent* aParent=0);
|
|
virtual ~DwParameter();
|
|
const DwParameter& <A HREF="param.html#op_eq">operator =</A> (const DwParameter& 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& <A HREF="param.html#Attribute">Attribute</A>() const;
|
|
void <A HREF="param.html#SetAttribute">SetAttribute</A>(const DwString& aAttribute);
|
|
const DwString& <A HREF="param.html#Value">Value</A>() const;
|
|
void <A HREF="param.html#SetValue">SetValue</A>(const DwString& 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& aStr,
|
|
DwMessageComponent* aParent);
|
|
static DwParameter* (*<A HREF="param.html#sNewParameter">sNewParameter</A>)(const DwString&, DwMessageComponent*);
|
|
|
|
public:
|
|
|
|
virtual void <A HREF="param.html#PrintDebugInfo">PrintDebugInfo</A>(ostream& aStrm, int aDepth=0) const;
|
|
virtual void <A HREF="param.html#CheckInvariants">CheckInvariants</A>() const;
|
|
|
|
protected:
|
|
|
|
void _PrintDebugInfo(ostream& 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& aParam) <BR>
|
|
DwParameter(const DwString& 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 tqparent 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 tqparent
|
|
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 tqparent. 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& <A NAME="op_eq">operator =</A>
|
|
(const DwParameter& 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 tqparent 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&
|
|
<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& aAttribute) </B></FONT>
|
|
<P>
|
|
Sets the attribute contained by this parameter.
|
|
<P>
|
|
<FONT COLOR="teal"><B> const DwString& <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&
|
|
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& 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& 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&,
|
|
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>
|