GpcCompactGpsMeasurement class Null safety

Implements efficient storage for GpsMeasurement elements.

The basic storage is the same of GpcCompactGpsPoint, with additional fields for: accuracy, heading, speed, speedAccuracy. One or more of these may be null. These are stored as follows after the inherited fields, all in little endian representation:

Added together it's 8 bytes per element extra compared to what's needed for the inherited GpsPoint properties.

Inheritance
Available Extensions

Constructors

GpcCompactGpsMeasurement()

Properties

capacity int
The available capacity (in elements) for storage.
read / writeinherited
elementSizeInBytes int
The number of bytes in _rawData required to store a single element.
read-onlyoverride
first GpsMeasurement
Returns the first element.
read-onlyinherited
hashCode int
The hash code for this object.
read-onlyinherited
isEmpty bool
Whether this collection has no elements.
read-onlyinherited
isNotEmpty bool
Whether this collection has at least one element.
read-onlyinherited
isReadonly bool
Collections are typically not read-only.
read-onlyinherited
iterator → RandomAccessIterator<GpsMeasurement>
Returns a new Iterator that allows iterating the elements of this Iterable.
read-onlyinherited
last GpsMeasurement
Returns the last element.
read-onlyinherited
length int
The number of elements currently stored in the collection.
read-onlyinherited
runtimeType Type
A representation of the runtime type of the object.
read-onlyinherited
single GpsMeasurement
Checks that this iterable has only one element, and returns that element.
read-onlyinherited
sortedByTime bool
Indicates whether the contents are sorted in increasing order of time value. If this is the case, time-based queries can be faster by performing a binary search. For every point in time only one entity is allowed to provide a location value, i.e. a list is not sorted if it contains two identical elements consecutively.
read-onlyinherited
sortingEnforcement SortingEnforcement
Whether the list is will disallow modifications that render it in a state that's not sorted by time. Setting this property to true while the collection is in an unsorted state will raise an exception.
read / writeinherited

Methods

add(GpsMeasurement element) bool
Add a single element to the collection.
inherited
add_Unsafe(GpsMeasurement element) → void
Internal implementation of add, which does not do any safety checks regarding sorting. Only to be overridden in children.
inherited
addAll(Iterable<GpsMeasurement> source) → void
inherited
addAllStartingAt(Iterable<GpsMeasurement> source, [int skipItems = 0, int? nrItems]) → void
Add all elements from source to this, after skipping skipItems items from the source. skipItems=0 is equivalent to calling addAll.
inherited
addAllStartingAt_Unsafe(Iterable<GpsMeasurement> source, [int skipItems = 0, int? nrItems]) → void
Internal implementation of addAllStartingAt, which does not do any safety checks regarding sorting. Only to be overridden in children.
inherited
addByteData(ByteData sourceData) → void
Adds all the sourceData to the internal buffer. The data must conform to the internal format, i.e. the number of bytes must be sufficient to represent completely a certain number of elements, otherwise an exception will be thrown.
inherited
any(bool test(GpsMeasurement element)) bool
Checks whether any element of this iterable satisfies test.
inherited
cast<R>() Iterable<R>
Provides a view of this iterable as an iterable of R instances.
inherited
checkContentsSortedByTime([int skipItems = 0, int? nrItems]) bool
Checks whether the contents are sorted by increasing time in cases where the list is not marked as sortedByTime.
inherited
compareElementTime(int elementNrA, int elementNrB) TimeComparisonResult
Performs compareTime for the elements in the positions elementNrA and elementNrB, then returns the result.
inherited
compareElementTimeWithSeparateItem(int elementNrA, GpsMeasurement elementB) TimeComparisonResult
Performs compareTime for the item in the positions elementNrA and some separate elementB that's presumably not in the list, then returns the result.
inherited
compareElementTimeWithSeparateTime(int elementNrA, GpsTime timeB) TimeComparisonResult
Performs compareTime for the item in the positions elementNrA and some separate timeB that's presumably not in the list, then returns the result.
inherited
contains(Object? element) bool
Whether the collection contains an element equal to element.
inherited
diffElementTimeAndSeparateTime(int elementNrA, GpsTime timeB) int
Calculate the difference in time between the item in the position elementNrA and the timeB. See diffTime for explanations on how the difference is calculated and when it is positive, negative or zero.
inherited
elementAt(int index) GpsMeasurement
Returns the indexth element.
inherited
every(bool test(GpsMeasurement element)) bool
Checks whether every element of this iterable satisfies test.
inherited
expand<T>(Iterable<T> toElements(GpsMeasurement element)) Iterable<T>
Expands each element of this Iterable into zero or more elements.
inherited
exportAsBytes(int startElement, int nrElements) List<int>
Returns a copy of the internal bytes data starting at startElement and containing nrElements elements.
inherited
firstWhere(bool test(GpsMeasurement element), {GpsMeasurement orElse()?}) GpsMeasurement
Returns the first element that satisfies the given predicate test.
inherited
fold<T>(T initialValue, T combine(T previousValue, GpsMeasurement element)) → T
Reduces a collection to a single value by iteratively combining each element of the collection with an existing value
inherited
followedBy(Iterable<GpsMeasurement> other) Iterable<GpsMeasurement>
Returns the lazy concatenation of this iterable and other.
inherited
forEach(void action(GpsMeasurement element)) → void
Invokes action on each element of this iterable in iteration order.
inherited
getSubSource(Iterable<GpsMeasurement> source, int skipItems, int? nrItems) Iterable<GpsMeasurement>
Returns a subset iterable from source that skips skipItems and copies up to nrItems (if specified) or the entire list (if not specified).
@protectedinherited
join([String separator = ""]) String
Converts each element to a String and concatenates the strings.
inherited
lastWhere(bool test(GpsMeasurement element), {GpsMeasurement orElse()?}) GpsMeasurement
Returns the last element that satisfies the given predicate test.
inherited
map<T>(T toElement(GpsMeasurement e)) Iterable<T>
The current elements of this iterable modified by toElement.
inherited
newEmpty({int? capacity}) GpcCompactGpsMeasurement
Creates a collection of the same type as this, optionally with a starting capacity for children that support that.
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
inherited
reduce(GpsMeasurement combine(GpsMeasurement value, GpsMeasurement element)) GpsMeasurement
Reduces a collection to a single value by iteratively combining elements of the collection using the provided function.
inherited
rollbackAddingLastItem() → dynamic
Removes the last object in this list, but only intended for use during add and similar calls. The list is in general not supposed to have insert/remove operations available as explained in the documentation of the list itself.
inherited
singleWhere(bool test(GpsMeasurement element), {GpsMeasurement orElse()?}) GpsMeasurement
Returns the single element that satisfies test.
inherited
skip(int count) → RandomAccessIterable<GpsMeasurement>
Returns an Iterable that provides all but the first count elements.
inherited
skipWhile(bool test(GpsMeasurement value)) Iterable<GpsMeasurement>
Returns an Iterable that skips leading elements while test is satisfied.
inherited
sublist(int start, [int? end]) GpsPointsCollection<GpsMeasurement>
Returns a new collection of the same type as the current collection containing the elements between start and end.
inherited
take(int count) → RandomAccessIterable<GpsMeasurement>
Returns a lazy iterable of the count first elements of this iterable.
inherited
takeWhile(bool test(GpsMeasurement value)) Iterable<GpsMeasurement>
Returns a lazy iterable of the leading elements satisfying test.
inherited
toList({bool growable = true}) List<GpsMeasurement>
Creates a List containing the elements of this Iterable.
inherited
toSet() Set<GpsMeasurement>
Creates a Set containing the same elements as this iterable.
inherited
toString() String
Returns a string representation of (some of) the elements of this.
inherited
where(bool test(GpsMeasurement element)) Iterable<GpsMeasurement>
Returns a new lazy Iterable with all elements that satisfy the predicate test.
inherited
whereType<T>() Iterable<T>
Returns a new lazy Iterable with all elements that have type T.
inherited

Operators

operator ==(Object other) bool
The equality operator.
inherited
operator [](int index) GpsMeasurement
inherited