Package com.chemaxon.descriptors.alignment

Class AbstractShapeComparator<T extends ShapeDescriptor>

java.lang.Object

com.chemaxon.descriptors.alignment.AbstractShapeComparator<T>

Type Parameters:

T -

All Implemented Interfaces:

ShapeComparator<T>, DescriptorComparator<T>, Guarded, Serializable

@Beta
@PublicApi
public abstract class AbstractShapeComparator<T extends ShapeDescriptor>
extends Object
implements ShapeComparator<T>

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface com.chemaxon.descriptors.common.Guarded

Guarded.EnsureThat, Guarded.New

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractShapeComparator(DescriptorGenerator<T> generator)

Method Summary

Modifier and Type	Method	Description
double	calculateDissimilarity(byte[] target, byte[] query)	Compare two descriptors in serialized form.
double	calculateDissimilarity(T target, T query)	Compare two descriptors.
double	calculateSimilarity(byte[] target, byte[] query)	Compare two descriptors in serialized form.
double	calculateSimilarity(T target, T query)	Compare two descriptors.
ShapeComparisonResult	compare(byte[] target, byte[] query)	Compare two descriptors in serialized form.
Object	getGuardObject()	Gets the guard object associated to the generated descriptors/utilities.
Optional<Double>	getLowerBound()	Get lower bound for the similarity/dissimilarity values if such one can be determined.
com.chemaxon.descriptors.common.unguarded.UnguardedContext<T,byte[]>	unguardedContext()	Associated unguarded context.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.chemaxon.descriptors.common.DescriptorComparator

getMetricMetadata, getUpperBound

Methods inherited from interface com.chemaxon.descriptors.alignment.ShapeComparator

compare

Constructor Details

AbstractShapeComparator

protected AbstractShapeComparator(DescriptorGenerator<T> generator)

Method Details

calculateSimilarity

public double calculateSimilarity(byte[] target,
 byte[] query)

Description copied from interface: DescriptorComparator

Compare two descriptors in serialized form.

Specified by:

calculateSimilarity in interface DescriptorComparator<T extends ShapeDescriptor>

Parameters:

target - Target descriptor in its serialized form

query - Query descriptor in its serialized form

Returns:

Similarity result

calculateDissimilarity

public double calculateDissimilarity(byte[] target,
 byte[] query)

Description copied from interface: DescriptorComparator

Compare two descriptors in serialized form.

Specified by:

calculateDissimilarity in interface DescriptorComparator<T extends ShapeDescriptor>

Parameters:

target - Target descriptor in its serialized form

query - Query descriptor in its serialized form

Returns:

Dissimilarity result

getLowerBound

public Optional<Double> getLowerBound()

Description copied from interface: DescriptorComparator

Get lower bound for the similarity/dissimilarity values if such one can be determined.

Specified by:

getLowerBound in interface DescriptorComparator<T extends ShapeDescriptor>

Returns:

Lower bond if exists; otherwise absent

calculateSimilarity

public double calculateSimilarity(T target,
 T query)

Description copied from interface: DescriptorComparator

Compare two descriptors.

Please note that this convenience method wraps ComparisonResult.getSimilarity() of comparison result constructed by DescriptorComparator.compare(com.chemaxon.descriptors.common.Descriptor, com.chemaxon.descriptors.common.Descriptor)

Specified by:

calculateSimilarity in interface DescriptorComparator<T extends ShapeDescriptor>

Parameters:

target - Target descriptor

query - Query descriptor

Returns:

Similarity result

calculateDissimilarity

public double calculateDissimilarity(T target,
 T query)

Description copied from interface: DescriptorComparator

Compare two descriptors.

Please note that this convenience method wraps ComparisonResult.getDissimilarity() of comparison result constructed by DescriptorComparator.compare(com.chemaxon.descriptors.common.Descriptor, com.chemaxon.descriptors.common.Descriptor)

Specified by:

calculateDissimilarity in interface DescriptorComparator<T extends ShapeDescriptor>

Parameters:

target - Target descriptor

query - Query descriptor

Returns:

Dissimilarity result

compare

public ShapeComparisonResult compare(byte[] target,
 byte[] query)

Description copied from interface: DescriptorComparator

Compare two descriptors in serialized form.

Please note that some implementation might return a result object containing additional data related to the compariosn results. This method's functionality is equivalent to comparing (with DescriptorComparator.compare(com.chemaxon.descriptors.common.Descriptor, com.chemaxon.descriptors.common.Descriptor)) deserialized (by DescriptorSerializer.fromByteArray(byte[])) descriptors.

Specified by:

compare in interface DescriptorComparator<T extends ShapeDescriptor>

Specified by:

compare in interface ShapeComparator<T extends ShapeDescriptor>

Parameters:

target - Target descriptor in its serialized form

query - Query descriptor in its serialized form

Returns:

Comparison result wrapper

unguardedContext

public com.chemaxon.descriptors.common.unguarded.UnguardedContext<T,byte[]> unguardedContext()

Description copied from interface: DescriptorComparator

Associated unguarded context. For internal use only.

Specified by:

unguardedContext in interface DescriptorComparator<T extends ShapeDescriptor>

Returns:

unguarded context

getGuardObject

public Object getGuardObject()

Description copied from interface: Guarded

Gets the guard object associated to the generated descriptors/utilities.

Note that serialization/deserialization must preserve guard object reference.

This method is intended to use only for ensuring the compatibility of manipulated objects.

Implementations might use the associated DescriptorGenerator or DescriptorParameters reference as the guard object, however it is a non recommended practice to use this method to access the associated generator to perform further operations on it.

Specified by:

getGuardObject in interface Guarded

Returns:

The guard object, can not be null.