se.lth.immun.xml.CharReader.scala Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of Xml Show documentation

Library for common Xml operations

The newest version!

package se.lth.immun.xml

import java.io.Reader

object CharReader {
	val BEFORE_READ = -2
	val EOF = -1
}

class CharReader(reader:Reader) {
	
	var char:Int = CharReader.BEFORE_READ
	var lineNo:Int = 0
	var colNo:Int = 0
	
	def next = {
		char = reader.read()
		char
	}
	
	def until(c:Char):String = {
		var sb = new StringBuilder
		
		if (char == CharReader.BEFORE_READ)
			char = reader.read()
		
		while (char != c) {
			if (char == CharReader.EOF) return sb.toString()
			val c = char.toChar
			if (c == '\n') {
				lineNo += 1
				colNo = 0
			} else
				colNo += 1
			
			sb += c
			next
		}
		
		sb.result
	}
	
	def xmlElement:String = {
		var sb = new StringBuilder
		
		if (char == CharReader.BEFORE_READ || char.toChar == '<')
			char = reader.read()
		
		while (char != '>') {
			if (char == CharReader.EOF) return sb.toString()
			val c = char.toChar
			c match {
				case '"' => 
					sb ++= textElement
				case _ =>
					sb += c 
			}
			next
		}
		
		sb.result
	}
	
	private def textElement:String = {
		var sb = new StringBuilder
		
		sb += '"'
		next
		
		while (char != '"') {
			if (char == CharReader.EOF) return sb.toString()
			val c = char.toChar
			c match {
				case _ =>
					sb += c
			}
			next
		}
		
		sb += '"'
		sb.result
	}

	def lineTag = "[line "+lineNo+"]"
}