Class SegmentedTimeline
- All Implemented Interfaces:
Serializable
,Cloneable
,Timeline
Timeline
that implements a "segmented" timeline with included,
excluded and exception segments.
A Timeline will present a series of values to be used for an axis. Each Timeline must provide transformation methods between domain values and timeline values.
A timeline can be used as parameter to a
DateAxis
to define the values that this axis
supports. This class implements a timeline formed by segments of equal
length (ex. days, hours, minutes) where some segments can be included in the
timeline and others excluded. Therefore timelines like "working days" or
"working hours" can be created where non-working days or non-working hours
respectively can be removed from the timeline, and therefore from the axis.
This creates a smooth plot with equal separation between all included
segments.
Because Timelines were created mainly for Date related axis, values are
represented as longs instead of doubles. In this case, the domain value is
just the number of milliseconds since January 1, 1970, 00:00:00 GMT as
defined by the getTime() method of Date
.
In this class, a segment is defined as a unit of time of fixed length. Examples of segments are: days, hours, minutes, etc. The size of a segment is defined as the number of milliseconds in the segment. Some useful segment sizes are defined as constants in this class: DAY_SEGMENT_SIZE, HOUR_SEGMENT_SIZE, FIFTEEN_MINUTE_SEGMENT_SIZE and MINUTE_SEGMENT_SIZE.
Segments are group together to form a Segment Group. Each Segment Group will contain a number of Segments included and a number of Segments excluded. This Segment Group structure will repeat for the whole timeline.
For example, a working days SegmentedTimeline would be formed by a group of 7 daily segments, where there are 5 included (Monday through Friday) and 2 excluded (Saturday and Sunday) segments.
Following is a diagram that explains the major attributes that define a segment. Each box is one segment and must be of fixed length (ms, second, hour, day, etc).
start time | v 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ... +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+... | | | | | |EE|EE| | | | | |EE|EE| | | | | |EE|EE| +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+... \____________/ \___/ \_/ \/ | | included excluded segment segments segments size \_________ _______/ \/ segment groupLegend:
<space> = Included segment
EE = Excluded segments in the base timeline
In the example, the following segment attributes are presented:
- segment size: the size of each segment in ms.
- start time: the start of the first segment of the first segment group to consider.
- included segments: the number of segments to include in the group.
- excluded segments: the number of segments to exclude in the group.
Exception Segments are allowed. These exception segments are defined as segments that would have been in the included segments of the Segment Group, but should be excluded for special reasons. In the previous working days SegmentedTimeline example, holidays would be considered exceptions.
Additionally the startTime
, or start of the first Segment of
the smallest segment group needs to be defined. This startTime could be
relative to January 1, 1970, 00:00:00 GMT or any other date. This creates a
point of reference to start counting Segment Groups. For example, for the
working days SegmentedTimeline, the startTime
could be
00:00:00 GMT of the first Monday after January 1, 1970. In this class, the
constant FIRST_MONDAY_AFTER_1900 refers to a reference point of the first
Monday of the last century.
A SegmentedTimeline can include a baseTimeline. This combination of timelines allows the creation of more complex timelines. For example, in order to implement a SegmentedTimeline for an intraday stock trading application, where the trading period is defined as 9:00 AM through 4:00 PM Monday through Friday, two SegmentedTimelines are used. The first one (the baseTimeline) would be a working day SegmentedTimeline (daily timeline Monday through Friday). On top of this baseTimeline, a second one is defined that maps the 9:00 AM to 4:00 PM period. Because the baseTimeline defines a timeline of Monday through Friday, the resulting (combined) timeline will expose the period 9:00 AM through 4:00 PM only on Monday through Friday, and will remove all other intermediate intervals.
Two factory methods newMondayThroughFridayTimeline() and newFifteenMinuteTimeline() are provided as examples to create special SegmentedTimelines.
- See Also:
-
Nested Class Summary
Nested ClassesModifier and TypeClassDescriptionprotected class
SpecialSegmentRange
that came from the BaseTimeline.class
Internal class to represent a valid segment for this timeline.protected class
Private internal class to represent a range of segments. -
Field Summary
FieldsModifier and TypeFieldDescriptionstatic final long
Defines a day segment size in ms.static TimeZone
Deprecated.As of 1.0.7.static final long
Defines a 15-minute segment size in ms.static long
Deprecated.As of 1.0.7.static final long
Defines a one hour segment size in ms.static final long
Defines a one-minute segment size in ms.static TimeZone
Deprecated.As of 1.0.7. -
Constructor Summary
ConstructorsConstructorDescriptionSegmentedTimeline
(long segmentSize, int segmentsIncluded, int segmentsExcluded) Constructs a new segmented timeline, optionaly using another segmented timeline as its base. -
Method Summary
Modifier and TypeMethodDescriptionvoid
addBaseTimelineException
(long domainValue) Adds a segment relative to the baseTimeline as an exception.void
addBaseTimelineException
(Date date) Adds a segment relative to the baseTimeline as an exception.void
addBaseTimelineExclusions
(long fromBaseDomainValue, long toBaseDomainValue) Adds all excluded segments from the BaseTimeline as exceptions to our timeline.void
addException
(long millisecond) Adds a segment as an exception.void
addException
(long fromDomainValue, long toDomainValue) Adds a segment range as an exception.void
addException
(Date exceptionDate) Adds a segment as an exception.void
addExceptions
(List exceptionList) Adds a list of dates as segment exceptions.clone()
Returns a clone of the timeline.boolean
containsDomainRange
(long domainValueStart, long domainValueEnd) Returnstrue
if a range of values are contained in the timeline.boolean
containsDomainRange
(Date dateDomainValueStart, Date dateDomainValueEnd) Returnstrue
if a range of values are contained in the timeline.boolean
containsDomainValue
(long millisecond) Returnstrue
if a value is contained in the timeline.boolean
containsDomainValue
(Date date) Returnstrue
if a value is contained in the timeline.boolean
Returns true if we are equal to the parameterstatic long
Returns the milliseconds for midnight of the first Monday after 1-Jan-1900, ignoring daylight savings.boolean
Returns the flag that controls whether or not the daylight saving adjustment is applied.Returns our baseTimeline, ornull
if none.getDate
(long value) Converts a millisecond value into aDate
object.long
getExceptionSegmentCount
(long fromMillisecond, long toMillisecond) Returns the number of exception segments wholly contained in the (fromDomainValue, toDomainValue) interval.Returns a list of all the exception segments.int
Returns the number of segments in a segment group.getSegment
(long millisecond) Returns a segment that contains a domainValue.getSegment
(Date date) Returns a segment that contains a date.int
Returns the number of segments excluded per segment group.long
Returns the size in milliseconds of the segments excluded per segment group.long
Returns the size in milliseconds of a segment group.int
Returns the number of segments included per segment group.long
Returns the size in ms of the segments included per segment group.long
Returns the size of one segment in ms.long
Returns the start time for the timeline.long
Special method that handles conversion between the Default Time Zone and a UTC time zone with no DST.long
getTimeFromLong
(long date) Converts a date/time value to take account of daylight savings time.int
hashCode()
Returns a hash code for this object.static SegmentedTimeline
Factory method to create a 15-min, 9:00 AM thought 4:00 PM, Monday through Friday SegmentedTimeline.static SegmentedTimeline
Factory method to create a Monday through Friday SegmentedTimeline.void
setAdjustForDaylightSaving
(boolean adjust) Sets the flag that controls whether or not the daylight saving adjustment is applied.void
setBaseTimeline
(SegmentedTimeline baseTimeline) Sets the base timeline.void
setExceptionSegments
(List exceptionSegments) Sets the exception segments list.void
setStartTime
(long millisecond) Sets the start time for the timeline.long
toMillisecond
(long timelineValue) Translates a value relative to the timeline into a millisecond.long
toTimelineValue
(long millisecond) Translates a value relative to the domain value (all Dates) into a value relative to the segmented timeline.long
toTimelineValue
(Date date) Translates a date into a value relative to the segmented timeline.
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Field Details
-
DAY_SEGMENT_SIZE
Defines a day segment size in ms.- See Also:
-
HOUR_SEGMENT_SIZE
Defines a one hour segment size in ms.- See Also:
-
FIFTEEN_MINUTE_SEGMENT_SIZE
Defines a 15-minute segment size in ms.- See Also:
-
MINUTE_SEGMENT_SIZE
Defines a one-minute segment size in ms.- See Also:
-
FIRST_MONDAY_AFTER_1900
Deprecated.As of 1.0.7. This field doesn't take into account changes to the default time zone.Utility constant that defines the startTime as the first monday after 1/1/1970. This should be used when creating a SegmentedTimeline for Monday through Friday. See static block below for calculation of this constant. -
NO_DST_TIME_ZONE
Deprecated.As of 1.0.7. This field is initialised based on the default time zone, and doesn't take into account subsequent changes to the default.Utility TimeZone object that has no DST and an offset equal to the default TimeZone. This allows easy arithmetic between days as each one will have equal size. -
DEFAULT_TIME_ZONE
Deprecated.As of 1.0.7. When the default time zone is required, just callTimeZone.getDefault()
.This is the default time zone where the application is running. See getTime() below where we make use of certain transformations between times in the default time zone and the no-dst time zone used for our calculations.
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-
Constructor Details
-
SegmentedTimeline
Constructs a new segmented timeline, optionaly using another segmented timeline as its base. This chaining of SegmentedTimelines allows further segmentation into smaller timelines. If a base- Parameters:
segmentSize
- the size of a segment in ms. This time unit will be used to compute the included and excluded segments of the timeline.segmentsIncluded
- Number of consecutive segments to include.segmentsExcluded
- Number of consecutive segments to exclude.
-
-
Method Details
-
firstMondayAfter1900
Returns the milliseconds for midnight of the first Monday after 1-Jan-1900, ignoring daylight savings.- Returns:
- The milliseconds.
- Since:
- 1.0.7
-
newMondayThroughFridayTimeline
Factory method to create a Monday through Friday SegmentedTimeline.The
startTime
of the resulting timeline will be midnight of the first Monday after 1/1/1900.- Returns:
- A fully initialized SegmentedTimeline.
-
newFifteenMinuteTimeline
Factory method to create a 15-min, 9:00 AM thought 4:00 PM, Monday through Friday SegmentedTimeline.This timeline uses a segmentSize of FIFTEEN_MIN_SEGMENT_SIZE. The segment group is defined as 28 included segments (9:00 AM through 4:00 PM) and 68 excluded segments (4:00 PM through 9:00 AM the next day).
In order to exclude Saturdays and Sundays it uses a baseTimeline that only includes Monday through Friday days.
The
startTime
of the resulting timeline will be 9:00 AM after the startTime of the baseTimeline. This will correspond to 9:00 AM of the first Monday after 1/1/1900.- Returns:
- A fully initialized SegmentedTimeline.
-
getAdjustForDaylightSaving
Returns the flag that controls whether or not the daylight saving adjustment is applied.- Returns:
- A boolean.
-
setAdjustForDaylightSaving
Sets the flag that controls whether or not the daylight saving adjustment is applied.- Parameters:
adjust
- the flag.
-
setStartTime
Sets the start time for the timeline. This is the beginning of segment zero.- Parameters:
millisecond
- the start time (encoded as in java.util.Date).
-
getStartTime
Returns the start time for the timeline. This is the beginning of segment zero.- Returns:
- The start time.
-
getSegmentsExcluded
Returns the number of segments excluded per segment group.- Returns:
- The number of segments excluded.
-
getSegmentsExcludedSize
Returns the size in milliseconds of the segments excluded per segment group.- Returns:
- The size in milliseconds.
-
getGroupSegmentCount
Returns the number of segments in a segment group. This will be equal to segments included plus segments excluded.- Returns:
- The number of segments.
-
getSegmentsGroupSize
Returns the size in milliseconds of a segment group. This will be equal to size of the segments included plus the size of the segments excluded.- Returns:
- The segment group size in milliseconds.
-
getSegmentsIncluded
Returns the number of segments included per segment group.- Returns:
- The number of segments.
-
getSegmentsIncludedSize
Returns the size in ms of the segments included per segment group.- Returns:
- The segment size in milliseconds.
-
getSegmentSize
Returns the size of one segment in ms.- Returns:
- The segment size in milliseconds.
-
getExceptionSegments
Returns a list of all the exception segments. This list is not modifiable.- Returns:
- The exception segments.
-
setExceptionSegments
Sets the exception segments list.- Parameters:
exceptionSegments
- the exception segments.
-
getBaseTimeline
Returns our baseTimeline, ornull
if none.- Returns:
- The base timeline.
-
setBaseTimeline
Sets the base timeline.- Parameters:
baseTimeline
- the timeline.
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toTimelineValue
Translates a value relative to the domain value (all Dates) into a value relative to the segmented timeline. The values relative to the segmented timeline are all consecutives starting at zero at the startTime.- Specified by:
toTimelineValue
in interfaceTimeline
- Parameters:
millisecond
- the millisecond (as encoded by java.util.Date).- Returns:
- The timeline value.
-
toTimelineValue
Translates a date into a value relative to the segmented timeline. The values relative to the segmented timeline are all consecutives starting at zero at the startTime.- Specified by:
toTimelineValue
in interfaceTimeline
- Parameters:
date
- date relative to the domain.- Returns:
- The timeline value (in milliseconds).
-
toMillisecond
Translates a value relative to the timeline into a millisecond.- Specified by:
toMillisecond
in interfaceTimeline
- Parameters:
timelineValue
- the timeline value (in milliseconds).- Returns:
- The domain value (in milliseconds).
- See Also:
-
getTimeFromLong
Converts a date/time value to take account of daylight savings time.- Parameters:
date
- the milliseconds.- Returns:
- The milliseconds.
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containsDomainValue
Returnstrue
if a value is contained in the timeline.- Specified by:
containsDomainValue
in interfaceTimeline
- Parameters:
millisecond
- the value to verify.- Returns:
true
if value is contained in the timeline.
-
containsDomainValue
Returnstrue
if a value is contained in the timeline.- Specified by:
containsDomainValue
in interfaceTimeline
- Parameters:
date
- date to verify- Returns:
true
if value is contained in the timeline
-
containsDomainRange
Returnstrue
if a range of values are contained in the timeline. This is implemented verifying that all segments are in the range.- Specified by:
containsDomainRange
in interfaceTimeline
- Parameters:
domainValueStart
- start of the range to verifydomainValueEnd
- end of the range to verify- Returns:
true
if the range is contained in the timeline
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containsDomainRange
Returnstrue
if a range of values are contained in the timeline. This is implemented verifying that all segments are in the range.- Specified by:
containsDomainRange
in interfaceTimeline
- Parameters:
dateDomainValueStart
- start of the range to verifydateDomainValueEnd
- end of the range to verify- Returns:
true
if the range is contained in the timeline
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addException
Adds a segment as an exception. An exception segment is defined as a segment to exclude from what would otherwise be considered a valid segment of the timeline. An exception segment can not be contained inside an already excluded segment. If so, no action will occur (the proposed exception segment will be discarded).The segment is identified by a domainValue into any part of the segment. Therefore the segmentStart <= domainValue <= segmentEnd.
- Parameters:
millisecond
- domain value to treat as an exception
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addException
Adds a segment range as an exception. An exception segment is defined as a segment to exclude from what would otherwise be considered a valid segment of the timeline. An exception segment can not be contained inside an already excluded segment. If so, no action will occur (the proposed exception segment will be discarded).The segment range is identified by a domainValue that begins a valid segment and ends with a domainValue that ends a valid segment. Therefore the range will contain all segments whose segmentStart <= domainValue and segmentEnd <= toDomainValue.
- Parameters:
fromDomainValue
- start of domain range to treat as an exceptiontoDomainValue
- end of domain range to treat as an exception
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addException
Adds a segment as an exception. An exception segment is defined as a segment to exclude from what would otherwise be considered a valid segment of the timeline. An exception segment can not be contained inside an already excluded segment. If so, no action will occur (the proposed exception segment will be discarded).The segment is identified by a Date into any part of the segment.
- Parameters:
exceptionDate
- Date into the segment to exclude.
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addExceptions
Adds a list of dates as segment exceptions. Each exception segment is defined as a segment to exclude from what would otherwise be considered a valid segment of the timeline. An exception segment can not be contained inside an already excluded segment. If so, no action will occur (the proposed exception segment will be discarded).The segment is identified by a Date into any part of the segment.
- Parameters:
exceptionList
- List of Date objects that identify the segments to exclude.
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addBaseTimelineException
Adds a segment relative to the baseTimeline as an exception. Because a base segment is normally larger than our segments, this may add one or more segment ranges to the exception list.An exception segment is defined as a segment to exclude from what would otherwise be considered a valid segment of the timeline. An exception segment can not be contained inside an already excluded segment. If so, no action will occur (the proposed exception segment will be discarded).
The segment is identified by a domainValue into any part of the baseTimeline segment.
- Parameters:
domainValue
- domain value to teat as a baseTimeline exception.
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addBaseTimelineException
Adds a segment relative to the baseTimeline as an exception. An exception segment is defined as a segment to exclude from what would otherwise be considered a valid segment of the timeline. An exception segment can not be contained inside an already excluded segment. If so, no action will occure (the proposed exception segment will be discarded).The segment is identified by a domainValue into any part of the segment. Therefore the segmentStart <= domainValue <= segmentEnd.
- Parameters:
date
- date domain value to treat as a baseTimeline exception
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addBaseTimelineExclusions
Adds all excluded segments from the BaseTimeline as exceptions to our timeline. This allows us to combine two timelines for more complex calculations.- Parameters:
fromBaseDomainValue
- Start of the range where exclusions will be extracted.toBaseDomainValue
- End of the range to process.
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getExceptionSegmentCount
Returns the number of exception segments wholly contained in the (fromDomainValue, toDomainValue) interval.- Parameters:
fromMillisecond
- the beginning of the interval.toMillisecond
- the end of the interval.- Returns:
- Number of exception segments contained in the interval.
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getSegment
Returns a segment that contains a domainValue. If the domainValue is not contained in the timeline (because it is not contained in the baseTimeline), a Segment that containsindex + segmentSize*m
will be returned for the smallestm
possible.- Parameters:
millisecond
- index into the segment- Returns:
- A Segment that contains index, or the next possible Segment.
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getSegment
Returns a segment that contains a date. For accurate calculations, the calendar should use TIME_ZONE for its calculation (or any other similar time zone). If the date is not contained in the timeline (because it is not contained in the baseTimeline), a Segment that containsdate + segmentSize*m
will be returned for the smallestm
possible.- Parameters:
date
- date into the segment- Returns:
- A Segment that contains date, or the next possible Segment.
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equals
Returns true if we are equal to the parameter -
hashCode
Returns a hash code for this object. -
getTime
Special method that handles conversion between the Default Time Zone and a UTC time zone with no DST. This is needed so all days have the same size. This method is the prefered way of converting a Data into milliseconds for usage in this class.- Parameters:
date
- Date to convert to long.- Returns:
- The milliseconds.
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getDate
Converts a millisecond value into aDate
object.- Parameters:
value
- the millisecond value.- Returns:
- The date.
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clone
Returns a clone of the timeline.- Overrides:
clone
in classObject
- Returns:
- A clone.
- Throws:
CloneNotSupportedException
- ??.
-