module Syck::BaseNode - syck-1.3.0 Documentation

# module Syck::BaseNode

YAML Generic Model container

### Public Instance Methods

[]( *key ) click to toggle source

We want the node to act like as Hash if it is.

    # File lib/syck/basenode.rb, line 190
    def []( *key )
        if Hash === @value
            v = @value.detect { |k,| k.transform == key.first }
            v[1] if v
        elsif Array === @value
            @value.[]( *key )
        end
    end

at( seg ) click to toggle source

    # File lib/syck/basenode.rb, line 71
    def at( seg )
        warn "#{caller[0]}: at() is deprecated" if $VERBOSE
        if Hash === @value
            self[seg]
        elsif Array === @value and seg =~ /\A\d+\Z/ and @value[seg.to_i]
            @value[seg.to_i]
        end
    end

children() click to toggle source

    # File lib/syck/basenode.rb, line 199
    def children
        if Hash === @value
            @value.values.collect { |c| c[1] }
        elsif Array === @value
            @value
        end
    end

children_with_index() click to toggle source

    # File lib/syck/basenode.rb, line 207
    def children_with_index
        warn "#{caller[0]}: children_with_index is deprecated, use children" if $VERBOSE
        if Hash === @value
            @value.keys.collect { |i| [self[i], i] }
        elsif Array === @value
            i = -1; @value.collect { |v| i += 1; [v, i] }
        end
    end

emit() click to toggle source

    # File lib/syck/basenode.rb, line 216
    def emit
        transform.to_yaml
    end

match_path( ypath_str ) click to toggle source

YPath search returning a complete depth array

    # File lib/syck/basenode.rb, line 83
    def match_path( ypath_str )
        warn "#{caller[0]}: match_path is deprecated" if $VERBOSE
        require 'syck/ypath'
        matches = []
        YPath.each_path( ypath_str ) do |ypath|
            seg = match_segment( ypath, 0 )
            matches += seg if seg
        end
        matches.uniq
    end

match_segment( ypath, depth ) click to toggle source

Search a node for a single YPath segment

    # File lib/syck/basenode.rb, line 97
    def match_segment( ypath, depth )
        warn "#{caller[0]}: match_segment is deprecated" if $VERBOSE
        deep_nodes = []
        seg = ypath.segments[ depth ]
        if seg == "/"
            unless String === @value
                idx = -1
                @value.collect { |v|
                    idx += 1
                    if Hash === @value
                        match_init = [v[0].transform, v[1]]
                        match_deep = v[1].match_segment( ypath, depth )
                    else
                        match_init = [idx, v]
                        match_deep = v.match_segment( ypath, depth )
                    end
                    if match_deep
                        match_deep.each { |m|
                            deep_nodes.push( match_init + m )
                        }
                    end
                }
            end
            depth += 1
            seg = ypath.segments[ depth ]
        end
        match_nodes =
            case seg
            when "."
                [[nil, self]]
            when ".."
                [["..", nil]]
            when "*"
                if @value.is_a? Enumerable
                    idx = -1
                    @value.collect { |h|
                        idx += 1
                        if Hash === @value
                            [h[0].transform, h[1]]
                        else
                            [idx, h]
                        end
                    }
                end
            else
                if seg =~ /^"(.*)"$/
                    seg = $1
                elsif seg =~ /^'(.*)'$/
                    seg = $1
                end
                if ( v = at( seg ) )
                    [[ seg, v ]]
                end
            end
        return deep_nodes unless match_nodes
        pred = ypath.predicates[ depth ]
        if pred
            case pred
            when /^\.=/
                pred = $'   # '
                match_nodes.reject! { |n|
                    n.last.value != pred
                }
            else
                match_nodes.reject! { |n|
                    n.last.at( pred ).nil?
                }
            end
        end
        return match_nodes + deep_nodes unless ypath.segments.length > depth + 1

        #puts "DEPTH: #{depth + 1}"
        deep_nodes = []
        match_nodes.each { |n|
            if n[1].is_a? BaseNode
                match_deep = n[1].match_segment( ypath, depth + 1 )
                if match_deep
                    match_deep.each { |m|
                        deep_nodes.push( n + m )
                    }
                end
            else
                deep_nodes = []
            end
        }
        deep_nodes = nil if deep_nodes.length == 0
        deep_nodes
    end

search( ypath_str ) click to toggle source

Search for YPath entry and return a list of qualified paths.

    # File lib/syck/basenode.rb, line 56
    def search( ypath_str )
        warn "#{caller[0]}: search() is deprecated" if $VERBOSE
        matches = match_path( ypath_str )

        if matches
            matches.collect { |m|
                path = []
                m.each_index { |i|
                    path.push m[i] if ( i % 2 ).zero?
                }
                "/" + path.compact.join( "/" )
            }
        end
    end

select( ypath_str ) click to toggle source

Search for YPath entry and return qualified nodes.

    # File lib/syck/basenode.rb, line 16
    def select( ypath_str )
        warn "#{caller[0]}: select is deprecated" if $VERBOSE
        matches = match_path( ypath_str )

        #
        # Create a new generic view of the elements selected
        #
        if matches
            result = []
            matches.each { |m|
                result.push m.last
            }
            Syck.transfer( 'seq', result )
        end
    end

select!( ypath_str ) click to toggle source

Search for YPath entry and return transformed nodes.

    # File lib/syck/basenode.rb, line 36
    def select!( ypath_str )
        warn "#{caller[0]}: select!() is deprecated" if $VERBOSE
        matches = match_path( ypath_str )

        #
        # Create a new generic view of the elements selected
        #
        if matches
            result = []
            matches.each { |m|
                result.push m.last.transform
            }
            result
        end
    end