Nested and Inner Type Summary

Modifier and Type	Class and Description
public static class	ModuleHashes.Builder This is used by jdk.internal.module.SystemModules class generated at link time.
public static interface	ModuleHashes.HashSupplier A supplier of a message digest.

Field Summary

Modifier and Type	Field and Description
private final String	algorithm
private final Map<String, byte[]>	nameToHash

Constructor Summary

Access	Constructor and Description
pack-priv	ModuleHashes(String the algorithm used to create the hashes algorithm, Map<String, byte[]> the map of module name to hash value nameToHash) Creates a `ModuleHashes`.

Method Summary

Modifier and Type	Method and Description
public String	algorithm() Returns the algorithm used to hash the modules ("SHA-256" for example).
private static byte[]	Returns: the hash computeHash(ModuleReader the module reader to access the module content reader, String the name of the message digest algorithm to use algorithm) Computes a hash from the names and content of a module.
pack-priv static byte[]	Returns: the hash computeHash(Supplier<ModuleReader> supplies the module reader to access the module content supplier, String the name of the message digest algorithm to use algorithm) Computes a hash from the names and content of a module.
public boolean	equals(Object obj) Overrides java.lang.Object.equals. Indicates whether some other object is "equal to" this one.
pack-priv static ModuleHashes	Returns: ModuleHashes that encapsulates the hashes generate(Set<ModuleReference> the set of modules mrefs, String the name of the message digest algorithm to use algorithm) Computes the hash from the names and content of a set of modules.
public int	hashCode() Overrides java.lang.Object.hashCode. Returns a hash code value for this object.
public Map<String, byte[]>	hashes() Returns unmodifiable map of module name to hash
public byte[]	hashFor(String mn) Returns the hash for the given module name, `null` if there is no hash recorded for the module.
public Set<String>	names() Returns the set of module names for which hashes are recorded.
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

algorithm	back to summary
private final String algorithm

nameToHash	back to summary
private final Map<String, byte[]> nameToHash

Constructor Detail

ModuleHashes back to summary

ModuleHashes	back to summary
pack-priv ModuleHashes(String algorithm, Map<String, byte[]> nameToHash) Creates a `ModuleHashes`. Parameters algorithm:String the algorithm used to create the hashes nameToHash:Map<String, byte[]> the map of module name to hash value

pack-priv ModuleHashes(String algorithm, Map<String, byte[]> nameToHash)

Creates a ModuleHashes.

Parameters

algorithm:String: the algorithm used to create the hashes
nameToHash:Map<String, byte[]>: the map of module name to hash value

Method Detail

algorithm	back to summary
public String algorithm() Returns the algorithm used to hash the modules ("SHA-256" for example).

computeHash	back to summary
private static byte[] computeHash(ModuleReader reader, String algorithm) Computes a hash from the names and content of a module. Parameters reader:ModuleReader the module reader to access the module content algorithm:String the name of the message digest algorithm to use Returns:byte[] the hash Exceptions IllegalArgumentException: if digest algorithm is not supported UncheckedIOException: if an I/O error occurs

computeHash

back to summary

private static byte[] computeHash(ModuleReader reader, String algorithm)

Computes a hash from the names and content of a module.

Parameters

reader:ModuleReader: the module reader to access the module content
algorithm:String: the name of the message digest algorithm to use

Returns:byte[]

the hash

Exceptions

IllegalArgumentException:: if digest algorithm is not supported
UncheckedIOException:: if an I/O error occurs

computeHash	back to summary
pack-priv static byte[] computeHash(Supplier<ModuleReader> supplier, String algorithm) Computes a hash from the names and content of a module. Parameters supplier:Supplier<ModuleReader> supplies the module reader to access the module content algorithm:String the name of the message digest algorithm to use Returns:byte[] the hash Exceptions IllegalArgumentException: if digest algorithm is not supported UncheckedIOException: if an I/O error occurs

computeHash

back to summary

pack-priv static byte[] computeHash(Supplier<ModuleReader> supplier, String algorithm)

Computes a hash from the names and content of a module.

Parameters

supplier:Supplier<ModuleReader>: supplies the module reader to access the module content
algorithm:String: the name of the message digest algorithm to use

Returns:byte[]

the hash

Exceptions

IllegalArgumentException:: if digest algorithm is not supported
UncheckedIOException:: if an I/O error occurs

equals back to summary

equals	back to summary
public boolean equals(Object obj) 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. Annotations @Override

public boolean equals(Object obj)

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.

Annotations

@Override

generate back to summary

generate	back to summary
pack-priv static ModuleHashes generate(Set<ModuleReference> mrefs, String algorithm) Computes the hash from the names and content of a set of modules. Returns a `ModuleHashes` to encapsulate the result. Parameters mrefs:Set<ModuleReference> the set of modules algorithm:String the name of the message digest algorithm to use Returns:ModuleHashes ModuleHashes that encapsulates the hashes Exceptions IllegalArgumentException: if digest algorithm is not supported UncheckedIOException: if an I/O error occurs

pack-priv static ModuleHashes generate(Set<ModuleReference> mrefs, String algorithm)

Computes the hash from the names and content of a set of modules. Returns a ModuleHashes to encapsulate the result.

Parameters

mrefs:Set<ModuleReference>: the set of modules
algorithm:String: the name of the message digest algorithm to use

Returns:ModuleHashes

ModuleHashes that encapsulates the hashes

Exceptions

IllegalArgumentException:: if digest algorithm is not supported
UncheckedIOException:: if an I/O error occurs

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. 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.

Annotations

@Override

hashes	back to summary
public Map<String, byte[]> hashes() Returns unmodifiable map of module name to hash

hashFor	back to summary
public byte[] hashFor(String mn) Returns the hash for the given module name, `null` if there is no hash recorded for the module.

names	back to summary
public Set<String> names() Returns the set of module names for which hashes are recorded.

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. 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.

Annotations

@Override

jdk.internal.module back to summary

public Class ModuleHashes.Builder

Class Inheritance

extends Object

java.lang.Object
jdk.internal.module.ModuleHashes.Builder

This is used by jdk.internal.module.SystemModules class generated at link time.

Field Summary

Modifier and Type	Field and Description
pack-priv final String	algorithm
pack-priv final Map<String, byte[]>	nameToHash

Constructor Summary

Access	Constructor and Description
pack-priv	Builder(String algorithm, int initialCapacity)

Method Summary

Modifier and Type	Method and Description
public ModuleHashes	build() Builds a `ModuleHashes`.
public ModuleHashes.Builder	hashForModule(String mn, byte[] hash) Sets the module hash for the given module name

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

Field Detail

algorithm	back to summary
pack-priv final String algorithm

nameToHash	back to summary
pack-priv final Map<String, byte[]> nameToHash

Constructor Detail

Builder	back to summary
pack-priv Builder(String algorithm, int initialCapacity)

Method Detail

build	back to summary
public ModuleHashes build() Builds a `ModuleHashes`.

hashForModule	back to summary
public ModuleHashes.Builder hashForModule(String mn, byte[] hash) Sets the module hash for the given module name

jdk.internal.module back to summary

public Interface ModuleHashes.HashSupplier

A supplier of a message digest.

Method Summary

Modifier and Type	Method and Description
public byte[]	generate(String algorithm)

Method Detail

generate	back to summary
public byte[] generate(String algorithm)

public final Class ModuleHashes

Nested and Inner Type Summary

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail

public Class ModuleHashes.Builder

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail

public Interface ModuleHashes.HashSupplier

Method Summary

Method Detail