[GROOVY-716] Reader.readLine() consumes too many characters.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.0-beta-9
• Fix Version/s: 1.1-beta-3
• Component/s: groovy-jdk
• Environment: Groovy B9; J2SE 1.5.0_1; WinXP-SP2
• Assignee: Joachim Baumann
• Reporter: Andreas Pillath
• Created: 02/Feb/05 04:45
• Updated: 20/Sep/07 16:23
• Resolved: 20/Sep/07 16:23

Description

Example:
import java.io.FileReader

f=new FileReader(inputFile)
header=f.readLine()
println "==${header}=="
f.readLines().each {
println "###"it"###"
}

only works if "f" is decorated with a BufferedReader
f=new BufferedReader(new FileReader(inputFile))
otherwise "f" misses some lines.

Cause:
DefaultGroovyMethods.readLine constructs BufferedReader of "self", if "self" is not an instance of BufferedReader.
BufferedReader does some readahead which "destroys" the FileReader contents.