Package nz.org.riskscape.cpython

Class CPythonSerializer

java.lang.Object

nz.org.riskscape.cpython.CPythonSerializer

public class CPythonSerializer
extends Object

Adds rudimentary handling of unexpected null values before we try to serialize the data (i.e. thus avoiding an NPE). The main source of an unexpected null would be the input data, e.g. we read an integer attribute from the shapefile, but the value stored is null.

Note that this does not perfectly avoid every possible NPE when serializing. It just aims to be 'good enough' to avoid falling over when the exposure-layer shapefile contains null values. Thus, we don't guarantee null-safe handling of nullable structs for example (yes, a hazard vector layer could still have null values, but users are more likely to define a type, or pick a single attribute, for the hazard-layer).

Constructor Summary

Constructors

Constructor	Description
CPythonSerializer()

Method Summary

Modifier and Type	Method	Description
static nz.org.riskscape.engine.types.Type	nullSafeType(nz.org.riskscape.engine.types.Type type)	Returns an equivalent type that will handle unexpected null values in the underlying input data.
void	serialize(DataOutputStream output, nz.org.riskscape.engine.types.Type type, Object value)	Serializes the given type/value to the given output stream with additional null-safety checks.

Methods inherited from class java.lang.Object

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

Constructor Details

CPythonSerializer

public CPythonSerializer()

Method Details

serialize

public void serialize(DataOutputStream output,
 nz.org.riskscape.engine.types.Type type,
 Object value)
               throws IOException

Serializes the given type/value to the given output stream with additional null-safety checks.

Throws:

IOException

nullSafeType

public static nz.org.riskscape.engine.types.Type nullSafeType(nz.org.riskscape.engine.types.Type type)

Returns an equivalent type that will handle unexpected null values in the underlying input data.

Returns:

either the same type, or a new equivalent type that is null-safe