Sample

oo_imitation_bash.sh

function main()
{
  Object::class.new Test object1

  object1.test_echo
}

function Object::class.new() {
    local class=$1
    local self=$2
    shift 2

    if type -t ${self}.initialize > /dev/null; then
      "${self}.initialize" "$@"
    fi

    local m
    for m in $(find_instance_methods "${class}::instance.*"); do
        # delegate
        m=${m#${class}::instance.}
        eval "function ${self}.${m}() {
                  ${class}::instance.${m} \"$self\" \"\$@\"
              }"
    done
}

function Test::instance.test_echo() {
  echo "test"
}

function find_instance_methods() {
    local pattern=$1
    local function_ line

    typeset -F | while read line; do
        function_=${line##* }
        [[ "$function_" == ${pattern} ]] && echo $function_
    done
}

main