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  • rexml/entity.rb

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REXML::Entity

God, I hate DTDs. I really do. Why this idiot standard still plagues us is beyond me.

Attributes

external[R]
name[R]
ndata[R]
pubid[R]
ref[R]

Public Class Methods

matches?(string) click to toggle source

Evaluates whether the given string matchs an entity definition, returning true if so, and false otherwise.

 
               # File rexml/entity.rb, line 68
def Entity::matches? string
        (ENTITYDECL =~ string) == 0
end
new(stream, value=nil, parent=nil, reference=false) click to toggle source

Create a new entity. Simple entities can be constructed by passing a name, value to the constructor; this creates a generic, plain entity reference. For anything more complicated, you have to pass a Source to the constructor with the entity definiton, or use the accessor methods. WARNING: There is no validation of entity state except when the entity is read from a stream. If you start poking around with the accessors, you can easily create a non-conformant Entity. The best thing to do is dump the stupid DTDs and use XMLSchema instead.

e = Entity.new( 'amp', '&' )

 
               # File rexml/entity.rb, line 35
def initialize stream, value=nil, parent=nil, reference=false
        super(parent)
        @ndata = @pubid = @value = @external = nil
        if stream.kind_of? Array
                @name = stream[1]
                if stream[-1] == '%'
                        @reference = true 
                        stream.pop
                else
                        @reference = false
                end
                if stream[2] =~ /SYSTEM|PUBLIC/
                        @external = stream[2]
                        if @external == 'SYSTEM'
                                @ref = stream[3]
                                @ndata = stream[4] if stream.size == 5
                        else
                                @pubid = stream[3]
                                @ref = stream[4]
                        end
                else
                        @value = stream[2]
                end
        else
                @reference = reference
                @external = nil
                @name = stream
                @value = value
        end
end

Public Instance Methods

normalized() click to toggle source

Returns the value of this entity unprocessed – raw. This is the normalized value; that is, with all %ent; and &ent; entities intact

 
               # File rexml/entity.rb, line 87
def normalized
        @value
end
to_s() click to toggle source

Returns this entity as a string. See write().

 
               # File rexml/entity.rb, line 121
def to_s
        rv = ''
        write rv
        rv
end
unnormalized() click to toggle source

Evaluates to the unnormalized value of this entity; that is, replacing all entities – both %ent; and &ent; entities. This differs from +value()+ in that value only replaces %ent; entities.

 
               # File rexml/entity.rb, line 75
def unnormalized
        document.record_entity_expansion unless document.nil?
        v = value()
        return nil if v.nil?
        @unnormalized = Text::unnormalize(v, parent)
        @unnormalized
end
value() click to toggle source

Returns the value of this entity. At the moment, only internal entities are processed. If the value contains internal references (IE, %blah;), those are replaced with their values. IE, if the doctype contains:

<!ENTITY % foo "bar">
<!ENTITY yada "nanoo %foo; nanoo>

then:

doctype.entity('yada').value   #-> "nanoo bar nanoo"

 
               # File rexml/entity.rb, line 136
def value
        if @value
                matches = @value.scan(PEREFERENCE_RE)
                rv = @value.clone
                if @parent
                        matches.each do |entity_reference|
                                entity_value = @parent.entity( entity_reference[0] )
                                rv.gsub!( /%#{entity_reference};/um, entity_value )
                        end
                end
                return rv
        end
        nil
end
write(out, indent=-1) click to toggle source

Write out a fully formed, correct entity definition (assuming the Entity object itself is valid.)

out

An object implementing <TT>&lt;&lt;<TT> to which the entity will be output

indent

DEPRECATED and ignored

 
               # File rexml/entity.rb, line 99
def write out, indent=-1
        out << '<!ENTITY '
        out << '% ' if @reference
        out << @name
        out << ' '
        if @external
                out << @external << ' '
                if @pubid
                        q = @pubid.include?('"')?"'":'"'
                        out << q << @pubid << q << ' '
                end
                q = @ref.include?('"')?"'":'"'
                out << q << @ref << q
                out << ' NDATA ' << @ndata if @ndata
        else
                q = @value.include?('"')?"'":'"'
                out << q << @value << q
        end
        out << '>'
end