inet.ipaddr.format

Class IPAddressDivision

java.lang.Object

inet.ipaddr.format.AddressDivisionBase

inet.ipaddr.format.AddressDivision

inet.ipaddr.format.IPAddressDivision

All Implemented Interfaces:

AddressItem, AddressStringDivision, IPAddressStringDivision, java.io.Serializable, java.lang.Comparable<AddressDivision>

Direct Known Subclasses:

IPAddressBitsDivision, IPAddressJoinedSegments, IPAddressSegment

public abstract class IPAddressDivision
extends AddressDivision
implements IPAddressStringDivision

A division of an IP address. May be associated with a prefix length, in which case that number of bits in the upper-most portion of the object represent a prefix, while the remaining bits can assume all possible values.

See Also:

Serialized Form

Method Summary

Modifier and Type	Method and Description
java.lang.Integer	getBlockMaskPrefixLength(boolean network) If this is equivalent to the mask for a CIDR prefix length block or subnet class, it returns the prefix length.
java.lang.Integer	getDivisionPrefixLength() Returns the network prefix for the division.
int	getPrefixAdjustedRangeString(int segmentIndex, AddressSegmentParams params, java.lang.StringBuilder appendable) Produces a string to represent the segment of the form a-b where the value b has been adjusted for the prefix, anything beyond the prefix length being zero.
java.lang.String	getString() Produces a normalized string to represent the segment.
java.lang.String	getWildcardString() Produces a string to represent the segment, favouring wildcards and range characters over the network prefix to represent subnets.
boolean	isPrefixBlock() Returns whether the division range includes the block of values for its prefix length
boolean	isPrefixBlock(int divisionPrefixLen)
boolean	isPrefixed()
boolean	isSinglePrefixBlock() Returns whether the division range matches the block of values for its prefix length
boolean	isSinglePrefixBlock(int divisionPrefixLen) Returns whether the division range matches exactly the block of values for the given prefix length.
boolean	matchesWithPrefixMask(long value, java.lang.Integer divisionPrefixLen)

Methods inherited from class inet.ipaddr.format.AddressDivision

compareTo, getCount, getDigitCount, getDivisionPrefixCount, getDivisionValueCount, getLowerValue, getMaxDigitCount, getMaxValue, getUpperValue, hasUppercaseVariations, includesMax, includesZero, isBoundedBy, isFullRange, isMax, isMultiple, isZero, matches, matchesWithMask, matchesWithMask

Methods inherited from class inet.ipaddr.format.AddressDivisionBase

getBytes, getBytes, getBytes, getDefaultTextualRadix, getDigitCount, getLowerStandardString, getMaxDigitCount, getStandardString, getUpperBytes, getUpperBytes, getUpperBytes, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface inet.ipaddr.format.IPAddressStringDivision

getBitCount, isFullRange

Methods inherited from interface inet.ipaddr.format.AddressStringDivision

getDigitCount, getLowerStandardString, getMaxDigitCount, getStandardString, isBoundedBy

Methods inherited from interface inet.ipaddr.format.AddressItem

getBitCount

Method Detail

isPrefixed

public boolean isPrefixed()

getDivisionPrefixLength

public java.lang.Integer getDivisionPrefixLength()

Returns the network prefix for the division. The network prefix is 16 for an address like 1.2.0.0/16. When it comes to each address division or segment, the prefix for the division is the prefix obtained when applying the address or section prefix. For instance, with the address 1.2.0.0/20, segment 1 has no prefix because the address prefix 20 extends beyond the 8 bits in the first segment, it does not even apply to the segment, segment 2 has no prefix because the address prefix extends beyond bits 9 to 16 which lie in the second segment, it does not apply to that segment either, segment 3 has the prefix 4 because the address prefix 20 corresponds to the first 4 bits in the 3rd segment, which means that the first 4 bits are part of the network section of the address or segment, and segment 4 has the prefix 0 because not a single bit is in the network section of the address or segment The prefix applied across the address is null ... null ... (1 to segment bit length) ... 0 ... 0 If the segment has no prefix then null is returned.

Specified by:

getDivisionPrefixLength in interface IPAddressStringDivision

Returns:

matchesWithPrefixMask

public boolean matchesWithPrefixMask(long value,
                                     java.lang.Integer divisionPrefixLen)

getBlockMaskPrefixLength

public java.lang.Integer getBlockMaskPrefixLength(boolean network)

If this is equivalent to the mask for a CIDR prefix length block or subnet class, it returns the prefix length. Otherwise, it returns null. A CIDR network mask is an address with all 1s in the network section (the upper bits) and then all 0s in the host section. A CIDR host mask is an address with all 0s in the network section (the lower bits) and then all 1s in the host section. The prefix length is the length of the network section. Also, keep in mind that the prefix length returned by this method is not equivalent to the prefix length used to construct this object. The prefix length used to construct indicates the network and host portion of this address. The prefix length returned here indicates the whether the value of this address can be used as a mask for the network and host of an address with that prefix length. Therefore the two values can be different values, or one can be null while the other is not. This method applies only to the lower value of the range if this segment represents multiple values.

Parameters:

network - whether to check for a network mask or a host mask

Returns:

the prefix length corresponding to this mask, or null if there is no such prefix length

See Also:

IPAddressSection.getPrefixLengthForSingleBlock()

isPrefixBlock

public boolean isPrefixBlock(int divisionPrefixLen)

Returns:

whether the division range includes the block of values for the given prefix length

isPrefixBlock

public boolean isPrefixBlock()

Description copied from interface: IPAddressStringDivision

Returns whether the division range includes the block of values for its prefix length

Specified by:

isPrefixBlock in interface IPAddressStringDivision

Returns:

whether the division range includes the block of values for the division prefix length, or false if the division has no prefix length

isSinglePrefixBlock

public boolean isSinglePrefixBlock(int divisionPrefixLen)

Returns whether the division range matches exactly the block of values for the given prefix length. If the given prefix length is null, return false.

Parameters:

divisionPrefixLen -

Returns:

whether the range of this division matches the range for a single prefix with a single value and the given prefix length.

isSinglePrefixBlock

public boolean isSinglePrefixBlock()

Description copied from interface: IPAddressStringDivision

Returns whether the division range matches the block of values for its prefix length

Specified by:

isSinglePrefixBlock in interface IPAddressStringDivision

Returns:

whether the division range matches exactly the block of values for its prefix length.

getString

public java.lang.String getString()

Produces a normalized string to represent the segment. If the segment CIDR prefix length covers the range, then it is assumed to be a CIDR, and the string has only the lower value of the CIDR range. Otherwise, the explicit range will be printed.

Overrides:

getString in class AddressDivisionBase

Returns:

getWildcardString

public java.lang.String getWildcardString()

Produces a string to represent the segment, favouring wildcards and range characters over the network prefix to represent subnets. If it exists, the segment CIDR prefix is ignored and the explicit range is printed.

Returns:

getPrefixAdjustedRangeString

public int getPrefixAdjustedRangeString(int segmentIndex,
                                        AddressSegmentParams params,
                                        java.lang.StringBuilder appendable)

Description copied from interface: IPAddressStringDivision

Produces a string to represent the segment of the form a-b where the value b has been adjusted for the prefix, anything beyond the prefix length being zero.

Specified by:

getPrefixAdjustedRangeString in interface IPAddressStringDivision

Returns:

if the supplied appendable is null, returns the length of the string that would have been appended, otherwise returns 0