Modifier and Type	Class and Description
protected static class	HPackHuffman.HuffmanCode

Modifier and Type	Field and Description
private static final int[]	DECODING_TABLE array based tree representation of a huffman code.
private static final int	HIGH_TERMINAL_BIT
private static final HPackHuffman.HuffmanCode[]	HUFFMAN_CODES
private static final int	LOW_MASK
private static final int	LOW_TERMINAL_BIT
protected static final StringManager	sm

Access	Constructor and Description
public	HPackHuffman()

Modifier and Type	Method and Description
public static void	decode(ByteBuffer The byte buffer data, int The length of data from the buffer to decode length, StringBuilder The target for the decompressed data target) Decodes a huffman encoded string into the target StringBuilder.
public static boolean	Returns: true if encoding succeeded encode(ByteBuffer The buffer to encode into buffer, String The string to encode toEncode, boolean If the string should be encoded in lower case forceLowercase) Encodes the given string into the buffer.

DECODING_TABLE	back to summary
private static final int[] DECODING_TABLE array based tree representation of a huffman code. the high two bytes corresponds to the tree node if the bit is set, and the low two bytes for if it is clear if the high bit is set it is a terminal node, otherwise it contains the next node position.

HIGH_TERMINAL_BIT	back to summary
private static final int HIGH_TERMINAL_BIT

HUFFMAN_CODES	back to summary
private static final HPackHuffman.HuffmanCode[] HUFFMAN_CODES

LOW_MASK	back to summary
private static final int LOW_MASK

LOW_TERMINAL_BIT	back to summary
private static final int LOW_TERMINAL_BIT

sm	back to summary
protected static final StringManager sm

HPackHuffman	back to summary
public HPackHuffman()

decode	back to summary
public static void decode(ByteBuffer data, int length, StringBuilder target) throws HpackException Decodes a huffman encoded string into the target StringBuilder. There must be enough space left in the buffer for this method to succeed. Parameters data:ByteBuffer The byte buffer length:int The length of data from the buffer to decode target:StringBuilder The target for the decompressed data Exceptions HpackException: If the Huffman encoded value in HPACK headers did not end with EOS padding

encode	back to summary
public static boolean encode(ByteBuffer buffer, String toEncode, boolean forceLowercase) Encodes the given string into the buffer. If there is not enough space in the buffer, or the encoded version is bigger than the original it will return false and not modify the buffers position. Parameters buffer:ByteBuffer The buffer to encode into toEncode:String The string to encode forceLowercase:boolean If the string should be encoded in lower case Returns:boolean true if encoding succeeded

org.apache.coyote.http2 back to summary

protected Class HPackHuffman.HuffmanCode

Class Inheritance

extends Object

java.lang.Object
org.apache.coyote.http2.HPackHuffman.HuffmanCode

Field Summary

Modifier and Type	Field and Description
pack-priv int	length length of the code, in bits
pack-priv int	value The value of the least significant bits of the code

Constructor Summary

Access	Constructor and Description
public	HuffmanCode(int value, int length)

Method Summary

Modifier and Type	Method and Description
public boolean	equals(Object the reference object with which to compare. o) Overrides java.lang.Object.equals. Indicates whether some other object is "equal to" this one.
public int	getLength()
public int	getValue()
public int	hashCode() Overrides java.lang.Object.hashCode. Returns a hash code value for this object.
public String	toString() Overrides java.lang.Object.toString. Returns a string representation of the object.

Inherited from java.lang.Object:: clone finalize getClass notify notifyAll wait wait wait

Field Detail

length	back to summary
pack-priv int length length of the code, in bits

value	back to summary
pack-priv int value The value of the least significant bits of the code

Constructor Detail

HuffmanCode	back to summary
public HuffmanCode(int value, int length)

Method Detail

equals back to summary

equals	back to summary
public boolean equals(Object o) Overrides java.lang.Object.equals. Doc from java.lang.Object.equals. Indicates whether some other object is "equal to" this one. The `equals` method implements an equivalence relation on non-null object references: It is reflexive: for any non-null reference value `x`, `x.equals(x)` should return `true`. It is symmetric: for any non-null reference values `x` and `y`, `x.equals(y)` should return `true` if and only if `y.equals(x)` returns `true`. It is transitive: for any non-null reference values `x`, `y`, and `z`, if `x.equals(y)` returns `true` and `y.equals(z)` returns `true`, then `x.equals(z)` should return `true`. It is consistent: for any non-null reference values `x` and `y`, multiple invocations of `x.equals(y)` consistently return `true` or consistently return `false`, provided no information used in `equals` comparisons on the objects is modified. For any non-null reference value `x`, `x.equals(null)` should return `false`. An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes. Parameters o:Object the reference object with which to compare. Returns:boolean `true` if this object is the same as the obj argument; `false` otherwise. Annotations @Override

public boolean equals(Object o)

Overrides java.lang.Object.equals.

Doc from java.lang.Object.equals.

Indicates whether some other object is "equal to" this one.

The equals method implements an equivalence relation on non-null object references:

It is reflexive: for any non-null reference value x, x.equals(x) should return true.
It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified.
For any non-null reference value x, x.equals(null) should return false.

An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.

Parameters

o:Object: the reference object with which to compare.

Returns:boolean

true if this object is the same as the obj argument; false otherwise.

Annotations

@Override

getLength	back to summary
public int getLength()

getValue	back to summary
public int getValue()

hashCode back to summary

hashCode	back to summary
public int hashCode() Overrides java.lang.Object.hashCode. Doc from java.lang.Object.hashCode. Returns a hash code value for this object. This method is supported for the benefit of hash tables such as those provided by `java.util.HashMap`. The general contract of `hashCode` is: Whenever it is invoked on the same object more than once during an execution of a Java application, the `hashCode` method must consistently return the same integer, provided no information used in `equals` comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application. If two objects are equal according to the `equals` method, then calling the `hashCode` method on each of the two objects must produce the same integer result. It is not required that if two objects are unequal according to the `equals` method, then calling the `hashCode` method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables. Returns:int a hash code value for this object Annotations @Override

public int hashCode()

Overrides java.lang.Object.hashCode.

Doc from java.lang.Object.hashCode.

Returns a hash code value for this object. This method is supported for the benefit of hash tables such as those provided by java.util.HashMap.

The general contract of hashCode is:

Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
If two objects are equal according to the equals method, then calling the hashCode method on each of the two objects must produce the same integer result.
It is not required that if two objects are unequal according to the equals method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.

Returns:int

a hash code value for this object

Annotations

@Override

toString back to summary

toString	back to summary
public String toString() Overrides java.lang.Object.toString. Doc from java.lang.Object.toString. Returns a string representation of the object. Satisfying this method's contract implies a non-`null` result must be returned. Returns:String a string representation of the object Annotations @Override

public String toString()

Overrides java.lang.Object.toString.

Doc from java.lang.Object.toString.

Returns a string representation of the object. Satisfying this method's contract implies a non-null result must be returned.

Returns:String

a string representation of the object

Annotations

@Override

public Class HPackHuffman

Nested and Inner Type Summary

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail

protected Class HPackHuffman.HuffmanCode

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail