org.oakgp.util

Class Utils

java.lang.Object

org.oakgp.util.Utils

public final class Utils
extends Object

Utility methods that support the functionality provided by the rest of the framework.

Field Summary

Fields

Modifier and Type	Field and Description
static ConstantNode	FALSE_NODE Represents the boolean value false.
static ConstantNode	TRUE_NODE Represents the boolean value true.

Method Summary

Modifier and Type	Method and Description
static <T> T[]	copyOf(T[] original) Returns a copy of the specified array.
static ConstantNode[]	createEnumConstants(Class<? extends Enum<?>> e, Type t) Returns an array consisting of a ConstantNode instance for each of the possible values of the specified enum.
static ConstantNode[]	createIntegerConstants(int minInclusive, int maxInclusive) Returns an array consisting of a ConstantNode instance for each of the integer values in the specified range.
static Type[]	createIntegerTypeArray(int size) Creates an array of the specified size and assigns the result of Type.integerType() to each element.
static <K,V> Map<K,List<V>>	groupBy(V[] values, Function<V,K> valueToKey) Returns a map grouping the specified values according to the specified classification function.
static <T extends Node> Map<Type,List<T>>	groupByType(T[] nodes) Returns a map grouping the specified nodes by their Type.
static int	selectSubNodeIndex(Random random, int nodeCount) Returns a int value between 0 (inclusive) and the specified nodeCount value minus 1 (exclusive).
static int	selectSubNodeIndex(Random random, Node tree) Returns randomly selected index of a node from the specified tree.

Methods inherited from class java.lang.Object

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

Field Detail

TRUE_NODE

public static final ConstantNode TRUE_NODE

Represents the boolean value true.

FALSE_NODE

public static final ConstantNode FALSE_NODE

Represents the boolean value false.

Method Detail

createEnumConstants

public static ConstantNode[] createEnumConstants(Class<? extends Enum<?>> e,
                                                 Type t)

Returns an array consisting of a ConstantNode instance for each of the possible values of the specified enum.

Parameters:

e - the enum that the ConstantNode instances should wrap

t - the Type that should be associated with the ConstantNode instances

createIntegerConstants

public static ConstantNode[] createIntegerConstants(int minInclusive,
                                                    int maxInclusive)

Returns an array consisting of a ConstantNode instance for each of the integer values in the specified range.

Parameters:

minInclusive - the minimum value (inclusive) to be represented by a ConstantNode in the returned array

maxInclusive - the minimum value (inclusive) to be represented by a ConstantNode in the returned array

createIntegerTypeArray

public static Type[] createIntegerTypeArray(int size)

Creates an array of the specified size and assigns the result of Type.integerType() to each element.

groupByType

public static <T extends Node> Map<Type,List<T>> groupByType(T[] nodes)

Returns a map grouping the specified nodes by their Type.

groupBy

public static <K,V> Map<K,List<V>> groupBy(V[] values,
                                           Function<V,K> valueToKey)

Returns a map grouping the specified values according to the specified classification function.

Parameters:

values - the values to group

valueToKey - the classification function used to group values

selectSubNodeIndex

public static int selectSubNodeIndex(Random random,
                                     Node tree)

Returns randomly selected index of a node from the specified tree.

selectSubNodeIndex

public static int selectSubNodeIndex(Random random,
                                     int nodeCount)

Returns a int value between 0 (inclusive) and the specified nodeCount value minus 1 (exclusive).

copyOf

public static <T> T[] copyOf(T[] original)

Returns a copy of the specified array.