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planetiler-core/src/main/java/com/onthegomap/planetiler/geo/Unit.java
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package com.onthegomap.planetiler.geo; | ||
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import com.onthegomap.planetiler.util.ToDoubleFunctionThatThrows; | ||
import java.util.Arrays; | ||
import java.util.List; | ||
import java.util.Map; | ||
import java.util.regex.Pattern; | ||
import java.util.stream.Collectors; | ||
import java.util.stream.Stream; | ||
import systems.uom.common.USCustomary; | ||
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/** Units of length and area measurement based off of constants defined in {@link USCustomary}. */ | ||
public interface Unit { | ||
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Pattern EXTRA_CHARS = Pattern.compile("[^a-z]+"); | ||
Pattern TRAILING_S = Pattern.compile("s$"); | ||
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private static <T extends Unit> Map<String, T> index(T[] values) { | ||
return Arrays.stream(values) | ||
.flatMap(unit -> Stream.concat(unit.symbols().stream(), Stream.of(unit.unitName(), unit.toString())) | ||
.map(label -> Map.entry(normalize(label), unit)) | ||
.distinct()) | ||
.collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue)); | ||
} | ||
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private static String normalize(String unit) { | ||
String result = EXTRA_CHARS.matcher(unit.toLowerCase()).replaceAll(""); | ||
return TRAILING_S.matcher(result).replaceAll(""); | ||
} | ||
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/** The {@link Base} measurement this unit is based off of. */ | ||
Base base(); | ||
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/** Computes the size of {@code geometry} in this unit. */ | ||
double of(WithGeometry geometry); | ||
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/** The aliases for this unit. */ | ||
List<String> symbols(); | ||
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/** The full name for this unit. */ | ||
String unitName(); | ||
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/** Converts a measurement in {@link Base} units to this unit. */ | ||
double fromBaseUnit(double base); | ||
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/** The base units that all other units are derived from. */ | ||
enum Base { | ||
/** Size of a feature in "z0 tiles" where 1=the length/width/area entire world. */ | ||
Z0_TILE( | ||
WithGeometry::length, | ||
WithGeometry::area), | ||
/** Size of a feature in meters. */ | ||
METER( | ||
WithGeometry::lengthMeters, | ||
WithGeometry::areaMeters); | ||
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private final ToDoubleFunctionThatThrows<WithGeometry> area; | ||
private final ToDoubleFunctionThatThrows<WithGeometry> length; | ||
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Base(ToDoubleFunctionThatThrows<WithGeometry> length, ToDoubleFunctionThatThrows<WithGeometry> area) { | ||
this.length = length; | ||
this.area = area; | ||
} | ||
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public double area(WithGeometry geometry) { | ||
return area.applyAndWrapException(geometry); | ||
} | ||
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public double length(WithGeometry geometry) { | ||
return length.applyAndWrapException(geometry); | ||
} | ||
} | ||
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/** Units to measure line length. */ | ||
enum Length implements Unit { | ||
METER(USCustomary.METER, "m"), | ||
FOOT(USCustomary.FOOT, "ft", "feet"), | ||
YARD(USCustomary.YARD, "yd"), | ||
NAUTICAL_MILE(USCustomary.NAUTICAL_MILE, "nm"), | ||
MILE(USCustomary.MILE, "mi", "miles"), | ||
KILOMETER(Base.METER, 1e-3, List.of("km"), "Kilometer"), | ||
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Z0_PIXEL(Base.Z0_TILE, 1d / 256, List.of("z0_px"), "Z0 Pixel"), | ||
Z0_TILE(Base.Z0_TILE, 1d, List.of("z0_ti"), "Z0 Tile"); | ||
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private static final Map<String, Length> NAMES = index(values()); | ||
private final Base base; | ||
private final double multiplier; | ||
private final List<String> symbols; | ||
private final String name; | ||
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Length(Base base, double multiplier, List<String> symbols, String name) { | ||
this.base = base; | ||
this.multiplier = multiplier; | ||
this.symbols = Stream.concat(symbols.stream(), Stream.of(name, name())).distinct().toList(); | ||
this.name = name; | ||
} | ||
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Length(javax.measure.Unit<javax.measure.quantity.Length> from, String... alias) { | ||
this(Base.METER, USCustomary.METER.getConverterTo(from).convert(1d), List.of(alias), from.getName()); | ||
} | ||
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public static Length from(String label) { | ||
Length unit = NAMES.get(normalize(label)); | ||
if (unit == null) { | ||
throw new IllegalArgumentException("Could not find area unit for '%s'".formatted(label)); | ||
} | ||
return unit; | ||
} | ||
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@Override | ||
public double fromBaseUnit(double i) { | ||
return i * multiplier; | ||
} | ||
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@Override | ||
public Base base() { | ||
return base; | ||
} | ||
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@Override | ||
public double of(WithGeometry geometry) { | ||
return fromBaseUnit(base.length.applyAndWrapException(geometry)); | ||
} | ||
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@Override | ||
public List<String> symbols() { | ||
return symbols; | ||
} | ||
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@Override | ||
public String unitName() { | ||
return name; | ||
} | ||
} | ||
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/** Units to measure polygon areas. */ | ||
enum Area implements Unit { | ||
SQUARE_METER(Length.METER), | ||
SQUARE_FOOT(Length.FOOT), | ||
SQUARE_YARD(Length.YARD), | ||
SQUARE_NAUTICAL_MILE(Length.NAUTICAL_MILE), | ||
SQUARE_MILE(Length.MILE), | ||
SQUARE_KILOMETER(Length.KILOMETER), | ||
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SQUARE_Z0_PIXEL(Length.Z0_PIXEL), | ||
SQUARE_Z0_TILE(Length.Z0_TILE), | ||
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ARE(USCustomary.ARE, "a"), | ||
HECTARE(USCustomary.HECTARE, "ha"), | ||
ACRE(USCustomary.ACRE, "ac"); | ||
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private static final Map<String, Area> NAMES = index(values()); | ||
private final Base base; | ||
private final double multiplier; | ||
private final List<String> symbols; | ||
private final String name; | ||
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Area(Base base, double multiplier, List<String> symbols, String name) { | ||
this.base = base; | ||
this.multiplier = multiplier; | ||
this.symbols = symbols; | ||
this.name = name; | ||
} | ||
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Area(Length length) { | ||
this(length.base, length.multiplier * length.multiplier, | ||
length.symbols().stream().flatMap(symbol -> Stream.of( | ||
"s" + symbol, | ||
"square " + symbol, | ||
"sq " + symbol, | ||
symbol + "2" | ||
)).toList(), | ||
"Square " + length.name); | ||
} | ||
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Area(javax.measure.Unit<javax.measure.quantity.Area> area, String... symbols) { | ||
this(Base.METER, USCustomary.ARE.getConverterTo(area).convert(0.01d), List.of(symbols), area.getName()); | ||
} | ||
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public static Area from(String label) { | ||
Area unit = NAMES.get(normalize(label)); | ||
if (unit == null) { | ||
throw new IllegalArgumentException("Could not find area unit for '%s'".formatted(label)); | ||
} | ||
return unit; | ||
} | ||
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@Override | ||
public double fromBaseUnit(double base) { | ||
return base * multiplier; | ||
} | ||
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@Override | ||
public Base base() { | ||
return base; | ||
} | ||
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@Override | ||
public double of(WithGeometry geometry) { | ||
return fromBaseUnit(base.area.applyAndWrapException(geometry)); | ||
} | ||
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@Override | ||
public List<String> symbols() { | ||
return symbols; | ||
} | ||
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@Override | ||
public String unitName() { | ||
return name; | ||
} | ||
} | ||
} |
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