dk.vajhoej.record

Class Util

java.lang.Object

dk.vajhoej.record.Util

public class Util
extends java.lang.Object

Utility class to process lists and to work with files instead of byte arrays.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	Util.ObjectHandler<T> Interface for processing objects read.
static interface	Util.Transformer<T1,T2> Interface for converting objects read.

Constructor Summary

Constructors

Constructor and Description
Util()

Method Summary

Modifier and Type	Method and Description
static <T1,T2> byte[]	copyAll(java.lang.Class<T1> t1, byte[] b, java.lang.Class<T2> t2, Util.Transformer<T1,T2> cvt) Convert array of struct in bytes into array of struct in bytes.
static <T1,T2> void	copyAll(java.lang.Class<T1> t1, java.io.InputStream is, java.lang.Class<T2> t2, java.io.OutputStream os, Util.Transformer<T1,T2> cvt) Convert array of struct in stream into array of struct in stream.
static <T> java.util.List<T>	readAll(java.lang.Class<T> t, byte[] b) Read array of struct in byte array into list of objects.
static <T> void	readAll(java.lang.Class<T> t, java.io.InputStream is, java.util.List<T> lst) Read array of struct in stream into list of objects.
static <T> void	readAll(java.lang.Class<T> t, java.io.InputStream is, Util.ObjectHandler<T> oh) Read array of struct in stream and processes them by handler.
static <T> byte[]	writeAll(java.lang.Class<T> t, java.util.List<T> lst) Write list of objects into array of struct in byte array.
static <T> void	writeAll(java.lang.Class<T> t, java.util.List<T> lst, java.io.OutputStream os) Write list of objects into array of struct in stream.

Methods inherited from class java.lang.Object

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

Constructor Detail

Util

public Util()

Method Detail

readAll

public static <T> java.util.List<T> readAll(java.lang.Class<T> t,
                                            byte[] b)
                                     throws RecordException

Read array of struct in byte array into list of objects.

Type Parameters:

T - struct type

Parameters:

t - type

b - byte array

Returns:

list of objects

Throws:

RecordException - if problem with record definition

writeAll

public static <T> byte[] writeAll(java.lang.Class<T> t,
                                  java.util.List<T> lst)
                           throws RecordException

Write list of objects into array of struct in byte array. Note: does not work with stucts containing VARSTR fields and STRUCT fields.

Type Parameters:

T - struct type

Parameters:

t - type

lst - list of objects

Returns:

byte array

Throws:

RecordException - if problem with record definition

readAll

public static <T> void readAll(java.lang.Class<T> t,
                               java.io.InputStream is,
                               java.util.List<T> lst)
                        throws RecordException,
                               java.io.IOException

Read array of struct in stream into list of objects. Note: does not work with stucts containing VARSTR fields and STRUCT fields.

Type Parameters:

T - struct type

Parameters:

t - type

is - stream

lst - list of objects

Throws:

RecordException - if problem with record definition

java.io.IOException - if problem with stream

writeAll

public static <T> void writeAll(java.lang.Class<T> t,
                                java.util.List<T> lst,
                                java.io.OutputStream os)
                         throws RecordException,
                                java.io.IOException

Write list of objects into array of struct in stream. Note: does not work with stucts containing VARSTR fields and STRUCT fields.

Type Parameters:

T - struct type

Parameters:

t - type

lst - list of objects

os - stream

Throws:

RecordException - if problem with record definition

java.io.IOException - if problem with stream

readAll

public static <T> void readAll(java.lang.Class<T> t,
                               java.io.InputStream is,
                               Util.ObjectHandler<T> oh)
                        throws RecordException,
                               java.io.IOException

Read array of struct in stream and processes them by handler. Note: does not work with stucts containing VARSTR fields and STRUCT fields.

Type Parameters:

T - struct type

Parameters:

t - type

is - stream

oh - handler of objects

Throws:

RecordException - if problem with record definition

java.io.IOException - if problem with stream

copyAll

public static <T1,T2> byte[] copyAll(java.lang.Class<T1> t1,
                                     byte[] b,
                                     java.lang.Class<T2> t2,
                                     Util.Transformer<T1,T2> cvt)
                              throws RecordException

Convert array of struct in bytes into array of struct in bytes.

Type Parameters:

T1 - input struct type

T2 - output struct type

Parameters:

t1 - from type

b - from byte array

t2 - to type

cvt - transformer class

Returns:

to byte array

Throws:

RecordException - if problem with record definitions

copyAll

public static <T1,T2> void copyAll(java.lang.Class<T1> t1,
                                   java.io.InputStream is,
                                   java.lang.Class<T2> t2,
                                   java.io.OutputStream os,
                                   Util.Transformer<T1,T2> cvt)
                            throws RecordException,
                                   java.io.IOException

Convert array of struct in stream into array of struct in stream.

Type Parameters:

T1 - input struct type

T2 - output struct type

Parameters:

t1 - from type

is - from stream

t2 - to type

os - to stream

cvt - transformer class

Throws:

RecordException - if problem with record definitions

java.io.IOException - if problem with streams