ch.algotrader.python

Class PythonHelper

java.lang.Object

ch.algotrader.python.PythonHelper

public class PythonHelper
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
PythonHelper()

Method Summary

Modifier and Type	Method and Description
static java.util.Collection<java.lang.Long>	castIntegerCollectionToLongOne(java.util.Collection collection) takes a collection containing int or long values and returns a long valued one.
static NamedParam[]	correctNamedParams(NamedParam[] namedParams) Replaces Integer values with their casted Long type value.
static <T> T	getTargetObject(java.lang.Object proxy, java.lang.Class<T> targetClass)

Methods inherited from class java.lang.Object

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

Constructor Detail

PythonHelper

public PythonHelper()

Method Detail

getTargetObject

public static <T> T getTargetObject(java.lang.Object proxy,
                                    java.lang.Class<T> targetClass)
                             throws java.lang.Exception

Throws:

java.lang.Exception

correctNamedParams

public static NamedParam[] correctNamedParams(NamedParam[] namedParams)

Replaces Integer values with their casted Long type value. This is necessary because of a Hibernate parameters issue where Integer object can't be set a value in a condition clause of a Long/long type field, e.g. with 'transaction.id=:tid', the tid can't be an Integer. In Python 2 it is possible to use long Python type (e.g. 'NamedParam("name", 2L)') which is then converted to Java Long by py4j, but in Python 3 there is only unlimited precision integer type and only bigger then max Java int value values are converted to Long instead of Integer by py4j.

castIntegerCollectionToLongOne

public static java.util.Collection<java.lang.Long> castIntegerCollectionToLongOne(java.util.Collection collection)

takes a collection containing int or long values and returns a long valued one.

See Also:

correctNamedParams(NamedParam[])