CODEWITHSUNDEEP
groovy
Anand Sunderraman
Anand Sunderraman

Reputation: 8138

Groovy read file line by line, eachLine method uses BufferedReader

I have written a groovy script to read a huge file line by line.

I currently am using boilerplate code as follows

File hugeFile = new File(filePath)
if (hugeFile.exists()) {
    hugeFile.eachLine {line ->
        //some process
    }
}

My question is how do I find out if the "eachLine" is using a BufferedReader to be memory efficient ?

Upvotes: 2

Views: 3333

Answers (1)

Will
Will

Reputation: 14529

Give it a shot to see if it can handle big files.

And check the source at github:

public static <T> T eachLine(Reader self, int firstLine, @ClosureParams(value=FromString.class,options={"String","String,Integer"}) Closure<T> closure) throws IOException {
    BufferedReader br;
    int count = firstLine;
    T result = null;

    if (self instanceof BufferedReader)
        br = (BufferedReader) self;
    else
        br = new BufferedReader(self);
    ...
}

Upvotes: 7

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