javatools.parsers
Class NumberParser

java.lang.Object
  javatools.parsers.NumberParser

public class NumberParser
extends java.lang.Object

This class is part of the Java Tools (see http://mpii.de/yago-naga/javatools). It is licensed under the Creative Commons Attribution License (see http://creativecommons.org/licenses/by/3.0) by the YAGO-NAGA team (see http://mpii.de/yago-naga). The NumberParser normalizes number expressions in English natural language text. It can work with expressions like

 10 million meters
          7 inches
          2.3 sq ft
          12:30 pm
          100 km
          12 ml
          10 Mb
 

Example:

 System.out.println(NumberParser.normalize("It was 1.2 inches long"));
          --> "It was 0.030479999999999997#meter long"
          
          System.out.println(toLong("more than ten kB"));
          --> 10000.0
 

Field Summary

static java.lang.String	FLOAT A number as a capturing RegEx
static java.lang.String	INT An integer as a capturing regex
static java.util.regex.Pattern	NUMBERPATTERN The number pattern
static java.lang.String	POSINT An integer as a capturing regex
static java.util.Map<java.lang.String,java.lang.Double>	prefixes Maps decimal prefixes (like "giga") to their double

Constructor Summary

NumberParser()

Method Summary

static boolean	different(java.lang.String n1, java.lang.String n2) TRUE if the numbers differ in the unit and or by more than 10%
static java.lang.Double	getDouble(java.lang.CharSequence d) Converts a String that contains a (non-normalized) number to a double or null
static java.lang.Integer	getInt(java.lang.CharSequence d) Converts a String that contains a (non-normalized) number to a int or null
static java.lang.Long	getLong(java.lang.CharSequence d) Converts a String that contains a (non-normalized) number to a long or null
static java.lang.String	getNumber(java.lang.CharSequence d) Extracts the pure number from a String containing a normalized number, else null
static java.lang.String[]	getNumberAndUnit(java.lang.CharSequence d, int[] pos) Extracts the number and its unit from a String containing a normalized number, else null, returns start and end position in pos[0] and pos[1] resp.
static java.util.List<java.lang.String>	getNumbers(java.lang.CharSequence d) Extracts the numbers and units from a normalized String
static boolean	isFloat(java.lang.String s) Tells whether this string is a normalized number
static boolean	isInt(java.lang.String s) Tells whether this string is a normalized integer number
static boolean	isNonNegativeInt(java.lang.String s) Tells whether this string is a normalized non-negative integer number
static boolean	isNumberAndUnit(java.lang.String s) Tells whether this string is a normalized number with unit
static void	main(java.lang.String[] argv) Test method
static java.lang.String	newNumber(double d, java.lang.String type) Creates a normalized number from a double and a type.
static java.lang.String	newNumber(java.lang.String n) Creates a normalized number without a type.
static java.lang.String	newNumber(java.lang.String n, java.lang.String type) Creates a normalized number from a number and a type
static java.lang.String	normalize(java.lang.CharSequence s) Normalizes all numbers in a String Note: If you fix something in this version, please try to apply the same fix at the position change tracking function below
static java.lang.String	normalize(java.lang.CharSequence s, PositionTracker posTracker) Normalizes all numbers in a String and updates a position mapping with the introduced pos changes Note: If you fix something in this version, please try to apply the same fix at the non-tracking function above
static java.lang.Double	parseDouble(java.lang.String d) Calls Double.parseDouble, returns an Integer or NULL
static java.lang.Integer	parseInt(java.lang.String d) Calls Integer.parseInt, returns an Integer or NULL

Methods inherited from class java.lang.Object

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

Field Detail

prefixes

public static final java.util.Map<java.lang.String,java.lang.Double> prefixes

Maps decimal prefixes (like "giga") to their double

FLOAT

public static final java.lang.String FLOAT

A number as a capturing RegEx

See Also:

Constant Field Values

POSINT

public static final java.lang.String POSINT

An integer as a capturing regex

See Also:

Constant Field Values

INT

public static final java.lang.String INT

An integer as a capturing regex

See Also:

Constant Field Values

NUMBERPATTERN

public static final java.util.regex.Pattern NUMBERPATTERN

The number pattern

Constructor Detail

NumberParser

public NumberParser()

Method Detail

newNumber

public static final java.lang.String newNumber(java.lang.String n,
                                               java.lang.String type)

Creates a normalized number from a number and a type

newNumber

public static final java.lang.String newNumber(java.lang.String n)

Creates a normalized number without a type.

See Also:

newNumber(String n, String type)

newNumber

public static final java.lang.String newNumber(double d,
                                               java.lang.String type)

Creates a normalized number from a double and a type.

See Also:

newNumber(String n, String type)

isFloat

public static boolean isFloat(java.lang.String s)

Tells whether this string is a normalized number

isInt

public static boolean isInt(java.lang.String s)

Tells whether this string is a normalized integer number

isNonNegativeInt

public static boolean isNonNegativeInt(java.lang.String s)

Tells whether this string is a normalized non-negative integer number

isNumberAndUnit

public static boolean isNumberAndUnit(java.lang.String s)

Tells whether this string is a normalized number with unit

normalize

public static java.lang.String normalize(java.lang.CharSequence s)

Normalizes all numbers in a String Note: If you fix something in this version, please try to apply the same fix at the position change tracking function below

normalize

public static java.lang.String normalize(java.lang.CharSequence s,
                                         PositionTracker posTracker)

Normalizes all numbers in a String and updates a position mapping with the introduced pos changes Note: If you fix something in this version, please try to apply the same fix at the non-tracking function above

getNumber

public static java.lang.String getNumber(java.lang.CharSequence d)

Extracts the pure number from a String containing a normalized number, else null

getNumberAndUnit

public static java.lang.String[] getNumberAndUnit(java.lang.CharSequence d,
                                                  int[] pos)

Extracts the number and its unit from a String containing a normalized number, else null, returns start and end position in pos[0] and pos[1] resp.

getNumbers

public static java.util.List<java.lang.String> getNumbers(java.lang.CharSequence d)

Extracts the numbers and units from a normalized String

getDouble

public static java.lang.Double getDouble(java.lang.CharSequence d)

Converts a String that contains a (non-normalized) number to a double or null

getLong

public static java.lang.Long getLong(java.lang.CharSequence d)

Converts a String that contains a (non-normalized) number to a long or null

getInt

public static java.lang.Integer getInt(java.lang.CharSequence d)

Converts a String that contains a (non-normalized) number to a int or null

parseInt

public static java.lang.Integer parseInt(java.lang.String d)

Calls Integer.parseInt, returns an Integer or NULL

parseDouble

public static java.lang.Double parseDouble(java.lang.String d)

Calls Double.parseDouble, returns an Integer or NULL

different

public static boolean different(java.lang.String n1,
                                java.lang.String n2)

TRUE if the numbers differ in the unit and or by more than 10%

main

public static void main(java.lang.String[] argv)
                 throws java.lang.Exception

Test method

Throws:

java.lang.Exception