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<HTML>
<HEAD>
<TITLE> DwMessage Man Page </TITLE>
</HEAD>
<BODY BGCOLOR="#FFFFFF">
<H2>
<FONT COLOR="navy"> NAME </FONT>
</H2>
<P>
DwMessage -- Class representing an RFC-822/MIME message
<H2>
<FONT COLOR="navy"> SYNOPSIS </FONT>
</H2>
<PRE>class DW_EXPORT DwMessage : public <A HREF="entity.html">DwEntity</A> {
public:
<A HREF="message.html#DwMessage">DwMessage</A>();
<A HREF="message.html#DwMessage">DwMessage</A>(const DwMessage& aMessage);
<A HREF="message.html#DwMessage">DwMessage</A>(const DwString& aStr, DwMessageComponent* aParent=0);
virtual ~DwMessage();
const DwMessage& <A HREF="message.html#op_eq">operator =</A> (const DwMessage& aMessage);
virtual DwMessageComponent* <A HREF="message.html#Clone">Clone</A>() const;
static DwMessage* <A HREF="message.html#NewMessage">NewMessage</A>(const DwString& aStr,
DwMessageComponent* aParent);
static DwMessage* (*<A HREF="message.html#sNewMessage">sNewMessage</A>)(const DwString&, DwMessageComponent*);
public:
virtual void <A HREF="message.html#PrintDebugInfo">PrintDebugInfo</A>(ostream& aStrm, int aDepth=0) const;
protected:
void _PrintDebugInfo(ostream& aStrm) const;
};
</PRE>
<H2>
<FONT COLOR="navy"> DESCRIPTION </FONT>
</H2>
<P>
<B><TT>DwMessage</TT></B> represents an RFC-822/MIME <I>message</I>.
<P>
A <I>message</I> contains both a collection of <I>header fields</I> and a
<I>body</I>. In the terminology of RFC-2045, the general term for the
headers-body combination is <I>entity</I>. In MIME++,
<B><TT>DwMessage</TT></B> is a direct subclass of
<B><TT><A HREF="entity.html">DwEntity</A></TT></B>, and therefore contains
both a <B><TT><A HREF="headers.html">DwHeaders</A></TT></B> object and a
<B><TT><A HREF="body.html">DwBody</A></TT></B> object.
<P>
In the tree (broken-down) representation of message, a
<B><TT>DwMessage</TT></B> object is almost always a root node, having child
nodes but no parent node. The child nodes are the
<B><TT>DwHeaders</TT></B> object and the <B><TT>DwBody</TT></B> object it
contains. A <B><TT>DwMessage</TT></B> may sometimes be an intermediate node.
In this special case, the parent node is a <B><TT>DwBody</TT></B> object
of type "message/*" and the <B><TT>DwMessage</TT></B> object represents an
encapsulated message.
<P>
To access the contained <B><TT>DwHeaders</TT></B> object, use the inherited
member function <B><TT>DwEntity::Headers()</TT></B>. To access the contained
<B><TT>DwBody</TT></B> object, use the inherited member function
<B><TT>DwEntity::Body()</TT></B>.
<H2>
<FONT COLOR="navy"> Public Member Functions </FONT>
</H2>
<P>
<FONT COLOR="teal"><B> <A NAME="DwMessage">DwMessage</A>() <BR>
DwMessage(const DwMessage& aMessage) <BR>
DwMessage(const DwString& aStr, DwMessageComponent* aParent=0)
</B></FONT>
<P>
The first constructor is the default constructor, which sets the
<B><TT>DwMessage</TT></B> object's string representation to the empty string
and sets its parent to <B><TT>NULL</TT></B>.
<P>
The second constructor is the copy constructor, which performs a deep copy
of <B><TT>aMessage</TT></B>. The parent of the new
<B><TT>DwMessage</TT></B> object is set to <B><TT>NULL</TT></B>.
<P>
The third constructor copies <B><TT>aStr</TT></B> to the
<B><TT>DwMessage</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.
<P>
<FONT COLOR="teal"><B> const DwMessage& <A NAME="op_eq">operator =</A>
(const DwMessage& aMessage) </B></FONT>
<P>
This is the assignment operator, which performs a deep copy of
<B><TT>aMessage</TT></B>. The parent node of the
<B><TT>DwMessage</TT></B> object is not changed.
<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>DwMessage</TT></B> on the free store that has the same
value as this <B><TT>DwMessage</TT></B> object. The basic idea is that of
a ``virtual copy constructor.''
<P>
<FONT COLOR="teal"><B> static DwMessage*
<A NAME="NewMessage">NewMessage</A>(const DwString& aStr, DwMessageComponent*
aParent) </B></FONT>
<P>
Creates a new <B><TT>DwMessage</TT></B> object on the free store. If the
static data member <B><TT>sNewMessage</TT></B> is <B><TT>NULL</TT></B>, this
member function will create a new <B><TT>DwMessage</TT></B> and return it.
Otherwise, <B><TT>NewMessage()</TT></B> will call the user-supplied function
pointed to by <B><TT>sNewMessage</TT></B>, which is assumed to return an
object from a class derived from <B><TT>DwMessage</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.
<H2>
<FONT COLOR="navy"> Public Data Members </FONT>
</H2>
<P>
<FONT COLOR="teal"><B> static DwMessage*
(*<A NAME="sNewMessage">sNewMessage</A>)(const DwString&,
DwMessageComponent*) </B></FONT>
<P>
If <B><TT>sNewMessage</TT></B> is not <B><TT>NULL</TT></B>, it is assumed
to point to a user supplied function that returns an object from a class
derived from <B><TT>DwMessage</TT></B>.
<P>
</BODY></HTML>
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