widebase.io.file.FileVariantReader.scala Maven / Gradle / Ivy
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package widebase.io.file
import java.nio.channels.FileChannel
import widebase.data.Datatype
import widebase.io.VariantReader
import widebase.io.filter.StreamFilter
import widebase.io.filter.StreamFilter.StreamFilter
/** Read variant types from [[java.lang.channels.FileChannel]].
*
* @param channel @see [[java.lang.channels.FileChannel]]
*
* @author myst3r10n
*/
class FileVariantReader(override protected val channel: FileChannel)
extends VariantReader(channel, StreamFilter.None)
with FileChannelLike {
private object Continue extends Throwable
override def readChar: Char = {
if(charBuffer.hasRemaining)
return charBuffer.get
val originMode = mode
mode = Datatype.Byte
if(buffer.hasRemaining)
position = position - buffer.remaining
next
mode = originMode
charBuffer.get
}
override def readChar(length: Int): Array[Char] = {
val values = Array.ofDim[Char](length)
if(values.length <= charBuffer.remaining)
charBuffer.get(values)
else {
var i = 0
while(i < values.length)
try {
if(!charBuffer.hasRemaining) {
val originMode = mode
mode = Datatype.Byte
if(buffer.hasRemaining)
position = position - buffer.remaining
next
mode = originMode
}
var length = values.length - i
if(length >= charBuffer.remaining)
length = charBuffer.remaining
charBuffer.get(values, i, length)
i += length
} catch {
case Continue => // Continue loop
}
}
values
}
override def readDouble: Double = {
if(doubleBuffer.hasRemaining)
return doubleBuffer.get
val originMode = mode
mode = Datatype.Byte
if(buffer.hasRemaining)
position = position - buffer.remaining
next
mode = originMode
doubleBuffer.get
}
override def readDouble(length: Int): Array[Double] = {
val values = Array.ofDim[Double](length)
if(values.length <= doubleBuffer.remaining)
doubleBuffer.get(values)
else {
var i = 0
while(i < values.length)
try {
if(!doubleBuffer.hasRemaining) {
val originMode = mode
mode = Datatype.Byte
if(buffer.hasRemaining)
position = position - buffer.remaining
next
mode = originMode
}
var length = values.length - i
if(length >= doubleBuffer.remaining)
length = doubleBuffer.remaining
doubleBuffer.get(values, i, length)
i += length
} catch {
case Continue => // Continue loop
}
}
values
}
override def readFloat: Float = {
if(floatBuffer.hasRemaining)
return floatBuffer.get
val originMode = mode
mode = Datatype.Byte
if(buffer.hasRemaining)
position = position - buffer.remaining
next
mode = originMode
floatBuffer.get
}
override def readFloat(length: Int): Array[Float] = {
val values = Array.ofDim[Float](length)
if(values.length <= floatBuffer.remaining)
floatBuffer.get(values)
else {
var i = 0
while(i < values.length)
try {
if(!floatBuffer.hasRemaining) {
val originMode = mode
mode = Datatype.Byte
if(buffer.hasRemaining)
position = position - buffer.remaining
next
mode = originMode
}
var length = values.length - i
if(length >= floatBuffer.remaining)
length = floatBuffer.remaining
floatBuffer.get(values, i, length)
i += length
} catch {
case Continue => // Continue loop
}
}
values
}
override def readInt: Int = {
if(intBuffer.hasRemaining)
return intBuffer.get
val originMode = mode
mode = Datatype.Byte
if(buffer.hasRemaining)
position = position - buffer.remaining
next
mode = originMode
intBuffer.get
}
override def readInt(length: Int): Array[Int] = {
val values = Array.ofDim[Int](length)
if(values.length <= intBuffer.remaining)
intBuffer.get(values)
else {
var i = 0
while(i < values.length)
try {
if(!intBuffer.hasRemaining) {
val originMode = mode
mode = Datatype.Byte
if(buffer.hasRemaining)
position = position - buffer.remaining
next
mode = originMode
}
var length = values.length - i
if(length >= intBuffer.remaining)
length = intBuffer.remaining
intBuffer.get(values, i, length)
i += length
} catch {
case Continue => // Continue loop
}
}
values
}
override def readLong: Long = {
if(longBuffer.hasRemaining)
return longBuffer.get
val originMode = mode
mode = Datatype.Byte
if(buffer.hasRemaining)
position = position - buffer.remaining
next
mode = originMode
longBuffer.get
}
override def readLong(length: Int): Array[Long] = {
val values = Array.ofDim[Long](length)
if(values.length <= longBuffer.remaining)
longBuffer.get(values)
else {
var i = 0
while(i < values.length)
try {
if(!longBuffer.hasRemaining) {
val originMode = mode
mode = Datatype.Byte
if(buffer.hasRemaining)
position = position - buffer.remaining
next
mode = originMode
}
var length = values.length - i
if(length >= longBuffer.remaining)
length = longBuffer.remaining
longBuffer.get(values, i, length)
i += length
} catch {
case Continue => // Continue loop
}
}
values
}
override def readShort: Short = {
if(shortBuffer.hasRemaining)
return shortBuffer.get
val originMode = mode
mode = Datatype.Byte
if(buffer.hasRemaining)
position = position - buffer.remaining
next
mode = originMode
shortBuffer.get
}
override def readShort(length: Int): Array[Short] = {
val values = Array.ofDim[Short](length)
if(values.length <= shortBuffer.remaining)
shortBuffer.get(values)
else {
var i = 0
while(i < values.length)
try {
if(!shortBuffer.hasRemaining) {
val originMode = mode
mode = Datatype.Byte
if(buffer.hasRemaining)
position = position - buffer.remaining
next
mode = originMode
}
var length = values.length - i
if(length >= shortBuffer.remaining)
length = shortBuffer.remaining
shortBuffer.get(values, i, length)
i += length
} catch {
case Continue => // Continue loop
}
}
values
}
}
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