gov.lbl.fastbit
Class FastBitStringReader

java.lang.Object
  gov.lbl.fastbit.FastBitStringReader

public class FastBitStringReader
extends java.lang.Object

Java StringReader for FastBit. It converts the strings retured from FastBit into strings that can be accessed from a Java program. See java/tests/TestFastBitJava.java for an example of use.

Nested Class Summary

class

FastBitStringReader.ReadHandle An auxiliary thread-safe class to hold file locks and buffers

Constructor Summary

FastBitStringReader()
FastBitStringReader constructor with default buffer length

FastBitStringReader(long bufferSize)
FastBitStringReader constructor

Method Summary

FastBitStringReader.ReadHandle	getHandle(FastBit fb, FastBit.QueryHandle fbHandle, java.lang.String partition, java.lang.String charsetName) Create FastBitStringReader.ReadHandle.
java.lang.String[]	getQualifiedStrings(FastBitStringReader.ReadHandle handle, java.lang.String column) Thread-safe FastBit String[] getter.
java.lang.String[]	getQualifiedStrings(java.nio.channels.FileChannel fc, FastBitStringReader.ReadHandle handle, java.lang.String column) Thread-safe FastBit String[] getter.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FastBitStringReader

public FastBitStringReader()

FastBitStringReader constructor with default buffer length

FastBitStringReader

public FastBitStringReader(long bufferSize)

FastBitStringReader constructor

Parameters:

bufferSize -

Method Detail

getQualifiedStrings

public java.lang.String[] getQualifiedStrings(java.nio.channels.FileChannel fc,
                                              FastBitStringReader.ReadHandle handle,
                                              java.lang.String column)
                                       throws FastBitStringReaderException

Thread-safe FastBit String[] getter. This function does not open and lock file.

Parameters:

fc -

handle -

column -

Returns:

Throws:

FastBitStringReaderException

getQualifiedStrings

public java.lang.String[] getQualifiedStrings(FastBitStringReader.ReadHandle handle,
                                              java.lang.String column)
                                       throws FastBitStringReaderException

Thread-safe FastBit String[] getter. This function opens and closes file.

Parameters:

handle -

column -

Returns:

Throws:

FastBitStringReaderException

getHandle

public FastBitStringReader.ReadHandle getHandle(FastBit fb,
                                                FastBit.QueryHandle fbHandle,
                                                java.lang.String partition,
                                                java.lang.String charsetName)

Create FastBitStringReader.ReadHandle. Currently FastBit.QueryHandle has not methods to get FastBit and partition.

Parameters:

fb -

fbHandle -

partition -

charsetName -

Returns: