NAME

Catmandu::Fix::Bind::visitor - a binder that computes Fix-es for every element in record

SYNOPSIS

# If data is like:

  numbers:
     - one
     - two
     - three
  person:
     name: jennie
     age: 44
     color:
        - green
        - purple
        - brown
        - more:
           foo: bar

do visitor()
   upcase(scalar)  # upcase every scalar value in the record
end

# will produce

  numbers:
     - ONE
     - TWO
     - THREE
  person:
     name: JENNIE
     age: 44
     color:
        - GREEN
        - PURPLE
        - BROWN
        - more:
           foo: BAR

 do visitor()
   # upcase all the 'name' fields in the record
   if all_match(key,name)
     upcase(scalar)
   end
 end

DESCRIPTION

The visitor binder will iterate over all the elements in a record and preform fixes on them.

Special node names are availabe to process every visited element:

scalar

Process a Fix on every scalar value. E.g.

upcase(scalar)
replace_all(scalar,'$','tested')

array

Process a Fix on every array value. E.g.

sort(array)

Values need to be put in the 'array' field to be available for fixes. The scope of the array is limited to the array visited.

hash

Process a Fix on every hash value. E.g.

copy_field(hash.age,hash.age2)

Values need to be put in the 'hash' field to be available for fixes. The scope of the hash is limited to the hash visited.

key

Provides access to the key on which the scalar,array or hash value is found. Eg.

# Upcase all 'name' fields in the record
if all_match(key,name)
   upcase(scalar)
end

CONFIGURATION

path

A path in the data to visit:

# Visit any field
do visit()
  ...
end

# Visit only the fields at my.deep.field
do visit(-path => my.deep.field )
  ...
end

AUTHOR

Patrick Hochstenbach - Patrick.Hochstenbach@UGent.be

SEE ALSO

Catmandu::Fix::Bind