com.facebook.buck.rules.keys

Class DefaultRuleKeyScopedHasher<HASH>

java.lang.Object

com.facebook.buck.rules.keys.DefaultRuleKeyScopedHasher<HASH>

All Implemented Interfaces:

RuleKeyScopedHasher

public class DefaultRuleKeyScopedHasher<HASH>
extends Object
implements RuleKeyScopedHasher

A wrapper of RuleKeyHasher that provides scoped hashing facilities.

Important: Container, wrapper and key signatures only get hashed if their scope was non-empty. I.e. if at least one thing gets hashed under their scope. This is to support rule key builders that ignore some fields.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DefaultRuleKeyScopedHasher.DefaultContainerScope

Nested classes/interfaces inherited from interface com.facebook.buck.rules.keys.RuleKeyScopedHasher

RuleKeyScopedHasher.ContainerScope

Method Summary

Modifier and Type	Method and Description
RuleKeyScopedHasher.ContainerScope	containerScope(RuleKeyHasher.Container container) Hashes the container iff non-empty (i.e.
CountingRuleKeyHasher<HASH>	getHasher()
Scope	keyScope(String key) Hashes the key iff non-empty (i.e.
Scope	pathKeyScope(Path key) Hashes the key iff non-empty (i.e.
Scope	wrapperScope(RuleKeyHasher.Wrapper wrapper) Hashes the wrapper iff non-empty (i.e.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getHasher

public CountingRuleKeyHasher<HASH> getHasher()

keyScope

public Scope keyScope(String key)

Hashes the key iff non-empty (i.e. if anything gets hashed during its scope).

Specified by:

keyScope in interface RuleKeyScopedHasher

pathKeyScope

public Scope pathKeyScope(Path key)

Hashes the key iff non-empty (i.e. if anything gets hashed during its scope).

Specified by:

pathKeyScope in interface RuleKeyScopedHasher

wrapperScope

public Scope wrapperScope(RuleKeyHasher.Wrapper wrapper)

Hashes the wrapper iff non-empty (i.e. if any element gets hashed during its scope).

Specified by:

wrapperScope in interface RuleKeyScopedHasher

containerScope

public RuleKeyScopedHasher.ContainerScope containerScope(RuleKeyHasher.Container container)

Hashes the container iff non-empty (i.e. if any element gets hashed during its scope).

Note that an element scope needs to be created for each element!

Specified by:

containerScope in interface RuleKeyScopedHasher