org.parboiled.support
Class IndexRange

java.lang.Object
  org.parboiled.support.IndexRange

public final class IndexRange
extends java.lang.Object

A simple immutable container for a range of indices into an underlying InputBuffer.

Field Summary

static IndexRange	EMPTY
int	end The index of the character following the last character of the range.
int	start The index of the first character in the range.

Constructor Summary

IndexRange(int start, int end)

Method Summary

boolean	equals(java.lang.Object o)
int	hashCode()
boolean	isEmpty() Determines whether this range contains no characters.
boolean	isFollowedBy(IndexRange other) Determines whether this range is immediated followed by the given other one.
boolean	isPrecededBy(IndexRange other) Determines whether this range immediated follows the given other one.
int	length()
IndexRange	mergedWith(IndexRange other) Created a new IndexRange that spans all characters between the smallest and the highest index of the two ranges.
boolean	overlapsWith(IndexRange other) Determines whether this range overlaps with the given other one.
java.lang.String	toString()
boolean	touches(IndexRange other) Determines whether this range immediated follows or precedes the given other one.

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Field Detail

EMPTY

public static final IndexRange EMPTY

start

public final int start

The index of the first character in the range.

end

public final int end

The index of the character following the last character of the range.

Constructor Detail

IndexRange

public IndexRange(int start,
                  int end)

Method Detail

isEmpty

public boolean isEmpty()

Determines whether this range contains no characters.

Returns:

true if the end matches the start of the range.

length

public int length()

Returns:

the number of characters covered by this range

overlapsWith

public boolean overlapsWith(IndexRange other)

Determines whether this range overlaps with the given other one.

Parameters:

other - the other range

Returns:

true if there is at least one index that is contained in both ranges

isPrecededBy

public boolean isPrecededBy(IndexRange other)

Determines whether this range immediated follows the given other one.

Parameters:

other - the other range

Returns:

true if this range immediated follows the given other one

isFollowedBy

public boolean isFollowedBy(IndexRange other)

Determines whether this range is immediated followed by the given other one.

Parameters:

other - the other range

Returns:

true if this range is immediated followed by the given other one

touches

public boolean touches(IndexRange other)

Determines whether this range immediated follows or precedes the given other one.

Parameters:

other - the other range

Returns:

true if this range immediated follows or precedes the given other one.

mergedWith

public IndexRange mergedWith(IndexRange other)

Created a new IndexRange that spans all characters between the smallest and the highest index of the two ranges.

Parameters:

other - the other range

Returns:

a new IndexRange instance

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object