Hi everyone,
I have managed to extract the xml data i need from a text file by using the command below. The xml data extracted has the following form:
(el3 element is optional, and el1 and el2 may have white spaces)
Code:
<Title><Doc>MyTitle</Doc>
<El1>My el1 is that</El1>
<El2>My el2 is that</El2>
<El3>My el3 is that</El3>
<Title><Doc>MyTitle 2</Doc>
<El1>My el1 is 123</El1>
<El2>My el2 is kajaer</El2>
<Title><Doc>MyTitle 3</Doc><El1>My el1 is that</El1>
<El2>My el2 is that and that</El2>
<El3>My el3 is that and this</El3>
more textFile | grep pattern1 | ....... | '/<El1>|<El2>|<El3>|<Title>/' | while read output;
do
echo $output | grep Title > /dev/null
if [ $? -eq 0 ]; then
echo "------------------"
echo "My Title = $output "
read output
fi
el1=$(echo $output )
read output
el2=$(echo $output )
read output
el3=$(echo $output )
echo "El1 = $el1 and El2 is $el2 and El3 is $el3."
done
There are two problems with this code. The first one is that if the elements have white space the echo outputs (reads until white space) :
<El1>My
The second problem is how should i deal with the optionality of el3.
If the line is read every time, and the element el3 is not present , the following Title element is considered as el3.
Thanks in advance
---------- Post updated at 12:22 PM ---------- Previous update was at 11:08 AM ----------
I have managed to solve the first problem, instead of read output , i read line. Now i just want to do the following , when i read a line that does not match a specific pattern , i would like to return the cursor to it's initial position , one line up. For example:
Code:
read line
echo $line | grep el3 > /dev/null
if [ $? -eq 0 ]; then
# ----- go up one line, so as to read the line again in the next iteration
fi
I also tried using continue in the if block but it does not work properly
Please advise
Last edited by Franklin52; 12-16-2009 at 06:29 AM..
Reason: Please use code tags
<Title><Doc>MyTitle</Doc>
<El1>My el1 is that</El1>
<El2>My el2 is that</El2>
<El3>My el3 is that</El3>
<Title><Doc>MyTitle 2</Doc>
<El1>My el1 is 123</El1>
<El2>My el2 is kajaer</El2>
<Title><Doc>MyTitle 3</Doc><El1>My el1 is that</El1>
<El2>My el2 is that and that</El2>
<El3>My el3 is that and this</El3>
I manage to get this xml through the following command :
Code:
more textFile | grep pattern1 | ....... | '/<El1>|<El2>|<El3>|<Title>/' | while read line;
And inside the while read line :
Code:
do
echo $line | grep Title > /dev/null
if [ $? -eq 0 ]; then
echo "------------------"
echo "My Title = $line "
read line
fi
el1=$(echo $line )
read line
el2=$(echo $line )
read line
echo $line | grep el1 > /dev/null
if [ $? -eq 0 ]; then
continue
fi
el3=$(echo $line )
echo "El1 = $el1 and El2 is $el2 and El3 is $el3."
done
If the el3 is missing in the xml document as it is optional , the third read line , will read the next <Title> element, and will move the cursor one line down , which is not desirable . What i want to achieve inside this block :
Code:
if [ $? -eq 0 ]; then
continue
fi
is to move the read cursor one line up , so as to re-read the <Title> element in the next loop. Also i cannot use goto.
<Title><Doc>MyTitle</Doc>
<El1>My el1 is that</El1>
<El2>My el2 is that</El2>
<El3>My el3 is that</El3>
<Title><Doc>MyTitle 2</Doc>
<El1>My el1 is 123</El1>
<El2>My el2 is kajaer</El2>
<Title><Doc>MyTitle 3</Doc><El1>My el1 is that</El1>
<El2>My el2 is that and that</El2>
<El3>My el3 is that and this</El3>
I manage to get this xml through the following command :
Code:
more textFile | grep pattern1 | ....... |
Why are you using more?
Code:
grep pattern1 textfile | ....
Quote:
Code:
'/<El1>|<El2>|<El3>|<Title>/' | while read line;
And inside the while read line :
Code:
do
echo $line | grep Title > /dev/null
Don't use grep to check a string; use case:
Code:
case $line in
*Title*) echo "My Title = $line " ;;
esac
Quote:
Code:
if [ $? -eq 0 ]; then
echo "------------------"
echo "My Title = $line "
read line
fi
el1=$(echo $line )
Why are you using command substitution instead of a direct assignment?
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