getJSONObjectPropertyValue

#! /bin/bash -
# 用于读取JSON格式配置文件，并返回可读值。 
LC_ALL=C
PRG="$0"
PRGDIR=`dirname "${PRG}"`"/"
object="{}"
propertyName="property"
## STARTRegion LongOption
# from /usr/share/doc/util-linux/examples/getopt-parse.bash
# Note that we use `"$@"' to let each command-line parameter expand to a 
# separate word. The quotes around `$@' are essential!
# We need TEMP as the `eval set --' would nuke the return value of getopt.
TEMP=`getopt -o o:p: --long object:,propertyName: \
     -n 'example.bash' -- "$@"`

if [ $? != 0 ] ; then echo "Terminating..." >&2 ; exit 1 ; fi
# Note the quotes around `$TEMP': they are essential!
eval set -- "$TEMP"

while true ; do
	case "$1" in
		-o|--object) object=$2 ; shift 2 ;;
		-p|--propertyName) propertyName=$2 ; shift 2 ;;
		--) shift ; break ;;
		*) echo "Internal error!" ; exit 1 ;;
	esac
done
if [ 0 -ne ${#1} ];
then
	echo "Remaining arguments:";
	for arg do echo '--> '"\`$arg'" ; done
fi
## ENDRegion LongOption

## BEGIN pre-format parameters
object=${object}
propertyName=${propertyName}
## END pre-format parameters
## BEGIN deal the status of config file's existence.
function getPropertyValueFromObject(){
	echo ${object} | python -c 'import json,sys;obj=json.load(sys.stdin);print json.dumps(obj'${propertyName}')';
}
## END deal the status of config file's existence.
## BEGIN to execute
getPropertyValueFromObject
#echo "Done."
## END of execute