Use a Dynamic pattern in grep from a file - regex

Question

So here is the issue. I have a file say A.java. Now don't bother about syntax. But here is what I aim to achieve.
import com.random.OrderSRO;
import com.random.SuborderSRO;
public A {
public void doRandom(){
OrderSRO orderSRO = service.getOrderByCode(request).getOrderSRO();
oEDTO.setCustomerName(orderSRO.getCustomerName());
for (SuborderSRO suborderSRO : orderSRO.getSuborders()) {
SOI undeliveredSOI = iShService.getSOIBySuborder(suborderSRO.getCode());
oEDTO.setSuborders(allSuborders);
oEDTO.setShDetail(pack.getShDetail());
oEDTO.setShMethod(pack.getShMethod().getCode());
oEDTO.setPurchaseDate(DateUtils.dateToString(orderSRO.getCreated(), "yyyy-MM-dd HH:mm:ss"));
oEDTO.setTotalAmount(orderSRO.getSellingPrice());
oEDTO.setPaidAmount(orderSRO.getPaidAmount());
oEDTO.setSdCash(orderSRO.getSdCash());
oEDTO.setShDetailsRequired(true);
}
public void doRandom1() {
OrderSRO orderSRO1 = service.getOrderByCode(request).getOrderSRO();
oEDTO.setPurchaseDate(DateUtils.dateToString(orderSRO1.getCreated(), "yyyy-MM-dd HH:mm:ss"));
oEDTO.setTotalAmount(orderSRO1.getSellingPrice());
oEDTO.setPaidAmount(orderSRO1.getPaidAmount());
oEDTO.setSdCash(orderSRO1.getSdCash());
}
}
I need to check what methods of OrderSRO are being used in A.java. Let me explain the method that I use.
So I need to check for patterns like
OrderSRO orderSRO = orderClientService.getOrderByCode(request).getOrderSRO();
Now I have variable orderSRO available. I need to now again grep this variable in the same file A.java
Although I have been able to achieve it but my method is not clean. Wondering if it can be done smartly, say in one line
grep -o 'OrderSRO .*=' EmailServiceImpl.java | awk '{ct[$2];} END {for (var in ct) {str=str "|" var "\\.[a-zA-Z]*"};print str}' >> pat2.txt
cat pat2.txt. This gives me
orderSRO1\.[a-zA-Z]*|orderSRO\.[a-zA-Z]*
grep -Ewof pat2.txt A.java | sort -u
orderSRO.getCode
orderSRO.getCreated
orderSRO.getCustomerName
orderSRO.getMobile
orderSRO.getPaidAmount
orderSRO.getSdCash
orderSRO.getSellingPrice
orderSRO.getSuborders
orderSRO1.getMobile
orderSRO1.getPaidAmount
orderSRO1.getSdCash
orderSRO1.getSellingPrice
orderSRO1.getSuborders

Answer 1

I can't help myself. Here's an extremely custom awk script:
awk -F"[.]*OrderSRO[ ]*|[ ]*=" 'NF>2 {a[$2]; next} {for( i in a ) {c=split($0, line, i".|[(][)]"); if(c==3&&line[2]!~/^\./) print i"."line[2]}}' A.java
which yields:
orderSRO.getCustomerName
orderSRO.getSuborders
orderSRO.getCode
orderSRO.getCreated
orderSRO.getSellingPrice
orderSRO.getPaidAmount
orderSRO.getSdCash
orderSRO1.getCreated
orderSRO1.getSellingPrice
orderSRO1.getPaidAmount
orderSRO1.getSdCash
where method calls are in file order and has at least the following assumptions:
Variable declarations are one to a line
The method calls are for POJO getters w/o args
Said getter calls are one to a line
It doesn't match the question output because things like orderSRO.getMobile() don't exist in the sample A.java.
Here's a multi-line view:
awk -F"[.]*OrderSRO[ ]*|[ ]*=" '
NF>2 {a[$2]; next}
{
for( i in a ) {
c=split($0, line, i".|[(][)]")
if(c==3&&line[2]!~/^\./)
print i"."line[2]
}
}' A.java
which can be translated like:
Set FS to find the variable name when NF>2
when NF>2, add the variable name to an array, don't attempt to process the line
For every line that's not a variable name, process it
split() the line on variable name + "." or "()" ( which is why this only works for no arg getters )
When the split() count (c) is 3, the 2nd element should be the getter
except when "()" leads to a false positive, so throw out methods that start with "."
print out the variable name followed by a "." and the no arg getter method name.
If you have to do this all the time, you're better off using something that understands code natively. That said, I can't think of a way to do this in Eclipse w/o multiple searches.