How to run a command on a filtered file list returned by grep

I often find myself passing a file list returned by some linux command to grep for filtering like below :

ls *.jar | grep test 

Sometimes i like to run a certain command on these filtered results. I achieve this by :

ls *.jar | grep test | while read line; do sha1sum "$line"; done

The generic form is :

<command generating a file list>   |   grep <filter keyword> | while read line; do <command> "$line"; done  

How to extract values from a java properties files in a bash/shell script

Let's say you have a java properties (sample.prop ) file that contains this :

ORACLE_HOST=myhost.us.oracle.com
MW_HOME=/scratch/codrguy/sandbox
DB_HOST=dbhost.us.oracle.com

Now, if we want to extract values from this properties file and use it in a shell/bash script for let's say an automation task, how do we go about that.

There are 3 parts to this task: 1) Getting the line that contains the value we want 2) extract the value from that line 3) store it in a variable to be used later in the script

To do part 1 we can simply grep for the value of the property we need :
For example :

grep ORACLE_HOST sample.prop
this returns
ORACLE_HOST=myhost.us.oracle.com

To do part 2 we pipe the output of part 1 into awk for extraction of the value we need

grep ORACLE_HOST sample.prop |  awk -F= '{print $2}'
this returns
myhost.us.oracle.com

the -F option of awk sets the delimiter to be '=' and then we print the second record which is what we need

Finally to store this value in a variable we do :

my_value=$(grep ORACLE_HOST sample.prop |  awk -F= '{print $2}')