Package org.parboiled.common
Class Utils
- java.lang.Object
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- org.parboiled.common.Utils
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public final class Utils extends java.lang.Object
General utility methods.
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Field Summary
Fields Modifier and Type Field Description static java.lang.Boolean[]
EMPTY_BOOLEAN_OBJECT_ARRAY
static java.lang.Byte[]
EMPTY_BYTE_OBJECT_ARRAY
static java.lang.Character[]
EMPTY_CHARACTER_OBJECT_ARRAY
static java.lang.Double[]
EMPTY_DOUBLE_OBJECT_ARRAY
static java.lang.Float[]
EMPTY_FLOAT_OBJECT_ARRAY
static java.lang.Integer[]
EMPTY_INTEGER_OBJECT_ARRAY
static java.lang.Long[]
EMPTY_LONG_OBJECT_ARRAY
static java.lang.Short[]
EMPTY_SHORT_OBJECT_ARRAY
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static <T> T[]
arrayOf(T[] firstElements, T lastElement)
Joins the given arguments into one array.static <T> T[]
arrayOf(T firstElement, T... moreElements)
Joins the given arguments into one array.static <T> T[]
arrayOf(T firstElement, T secondElement, T... moreElements)
Joins the given arguments into one array.static <T> boolean
equal(T a, T b)
Null enabled equals().static java.lang.reflect.Constructor
findConstructor(java.lang.Class<?> type, java.lang.Object[] args)
Finds the constructor of the given class that is compatible with the given arguments.static java.lang.Class<?>
getClass(java.lang.reflect.Type type)
Get the underlying class for a type, or null if the type is a variable type.static java.util.List<java.lang.Class<?>>
getTypeArguments(java.lang.Class<?> base, java.lang.Class<?> implementation)
Gets the actual type arguments that are used in a given implementation of a given generic base class or interface.static java.lang.String
humanize(long value)
Formats the given long value into a human readable notation using the Kilo, Mega, Giga, etc.static java.lang.Boolean[]
toObjectArray(boolean[] array)
static java.lang.Byte[]
toObjectArray(byte[] array)
static java.lang.Character[]
toObjectArray(char[] array)
static java.lang.Double[]
toObjectArray(double[] array)
static java.lang.Float[]
toObjectArray(float[] array)
static java.lang.Integer[]
toObjectArray(int[] array)
static java.lang.Long[]
toObjectArray(long[] array)
static java.lang.Short[]
toObjectArray(short[] array)
static java.lang.String
toString(java.lang.Object obj)
Null enabled toString().
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Field Detail
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EMPTY_CHARACTER_OBJECT_ARRAY
public static final java.lang.Character[] EMPTY_CHARACTER_OBJECT_ARRAY
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EMPTY_INTEGER_OBJECT_ARRAY
public static final java.lang.Integer[] EMPTY_INTEGER_OBJECT_ARRAY
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EMPTY_LONG_OBJECT_ARRAY
public static final java.lang.Long[] EMPTY_LONG_OBJECT_ARRAY
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EMPTY_SHORT_OBJECT_ARRAY
public static final java.lang.Short[] EMPTY_SHORT_OBJECT_ARRAY
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EMPTY_BYTE_OBJECT_ARRAY
public static final java.lang.Byte[] EMPTY_BYTE_OBJECT_ARRAY
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EMPTY_FLOAT_OBJECT_ARRAY
public static final java.lang.Float[] EMPTY_FLOAT_OBJECT_ARRAY
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EMPTY_DOUBLE_OBJECT_ARRAY
public static final java.lang.Double[] EMPTY_DOUBLE_OBJECT_ARRAY
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EMPTY_BOOLEAN_OBJECT_ARRAY
public static final java.lang.Boolean[] EMPTY_BOOLEAN_OBJECT_ARRAY
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Method Detail
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toObjectArray
public static java.lang.Character[] toObjectArray(char[] array)
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toObjectArray
public static java.lang.Integer[] toObjectArray(int[] array)
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toObjectArray
public static java.lang.Long[] toObjectArray(long[] array)
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toObjectArray
public static java.lang.Short[] toObjectArray(short[] array)
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toObjectArray
public static java.lang.Byte[] toObjectArray(byte[] array)
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toObjectArray
public static java.lang.Float[] toObjectArray(float[] array)
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toObjectArray
public static java.lang.Double[] toObjectArray(double[] array)
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toObjectArray
public static java.lang.Boolean[] toObjectArray(boolean[] array)
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arrayOf
public static <T> T[] arrayOf(T firstElement, T... moreElements)
Joins the given arguments into one array.- Parameters:
firstElement
- the first elementmoreElements
- more elements (optional)- Returns:
- a new array containing all arguments.
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arrayOf
public static <T> T[] arrayOf(T firstElement, T secondElement, T... moreElements)
Joins the given arguments into one array.- Parameters:
firstElement
- the first elementsecondElement
- the second elementmoreElements
- more elements (optional)- Returns:
- a new array containing all arguments.
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arrayOf
public static <T> T[] arrayOf(T[] firstElements, T lastElement)
Joins the given arguments into one array.- Parameters:
firstElements
- the first elementslastElement
- the element to append- Returns:
- a new array containing all arguments.
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toString
public static java.lang.String toString(java.lang.Object obj)
Null enabled toString().- Parameters:
obj
- the object- Returns:
- the empty string of obj is null, otherwise obj.toString()
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equal
public static <T> boolean equal(T a, T b)
Null enabled equals().- Parameters:
a
- the first objectb
- the second object- Returns:
- true if both are null or both are equal
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getTypeArguments
public static java.util.List<java.lang.Class<?>> getTypeArguments(java.lang.Class<?> base, java.lang.Class<?> implementation)
Gets the actual type arguments that are used in a given implementation of a given generic base class or interface. (Based on code copyright 2007 by Ian Robertson).- Parameters:
base
- the generic base class or interfaceimplementation
- the type (potentially) implementing the given base class or interface- Returns:
- a list of the raw classes for the actual type arguments.
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getClass
public static java.lang.Class<?> getClass(java.lang.reflect.Type type)
Get the underlying class for a type, or null if the type is a variable type. (Copyright 2007 by Ian Robertson).- Parameters:
type
- the type- Returns:
- the underlying class
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findConstructor
public static java.lang.reflect.Constructor findConstructor(java.lang.Class<?> type, java.lang.Object[] args)
Finds the constructor of the given class that is compatible with the given arguments.- Parameters:
type
- the class to find the constructor ofargs
- the arguments- Returns:
- the constructor
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humanize
public static java.lang.String humanize(long value)
Formats the given long value into a human readable notation using the Kilo, Mega, Giga, etc. abbreviations.- Parameters:
value
- the value to format- Returns:
- the string representation
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