com.facebook.buck.core.select

Class AbstractSelectorListResolver

java.lang.Object

com.facebook.buck.core.select.AbstractSelectorListResolver

All Implemented Interfaces:

SelectorListResolver

Direct Known Subclasses:

DefaultSelectorListResolver, UnconfiguredSelectorListResolver

public abstract class AbstractSelectorListResolver
extends Object
implements SelectorListResolver

Provides base functionality for selector list resolvers.

Field Summary

Fields

Modifier and Type	Field and Description
protected static Object	NULL_VALUE

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractSelectorListResolver(SelectableResolver selectableResolver)

Method Summary

Modifier and Type	Method and Description
protected static void	assertNotMultipleMatches(Map<Selectable,?> matchingConditions, String attributeName, BuildTarget buildTarget) Assertion that ensures that the current configuration doesn't match multiple select dictionary keys
protected static void	assertSelectorHasDefault(BuildTarget buildTarget, DependencyStack dependencyStack, String attributeName, Selector<?> selector) Assertion for the selector to contain "DEFAULT" as key inside the dictionary.
protected <T> Map<Selectable,Object>	findMatchingConditions(SelectableConfigurationContext configurationContext, Selector<T> selector, DependencyStack dependencyStack) Returns the value for which the current configuration matches the key inside the select dictionary
<T> T	resolveList(SelectableConfigurationContext configurationContext, BuildTarget buildTarget, String attributeName, SelectorList<T> selectorList, Concatable<T> concatable, DependencyStack dependencyStack) Resolves the elements in a given SelectorList and returns the concatenated value.
protected abstract <T> T	resolveSelector(SelectableConfigurationContext configurationContext, BuildTarget buildTarget, DependencyStack dependencyStack, String attributeName, Selector<T> selector)

Methods inherited from class java.lang.Object

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

Field Detail

NULL_VALUE

protected static final Object NULL_VALUE

Constructor Detail

AbstractSelectorListResolver

protected AbstractSelectorListResolver(SelectableResolver selectableResolver)

Method Detail

resolveList

@Nullable
public <T> T resolveList(SelectableConfigurationContext configurationContext,
                                   BuildTarget buildTarget,
                                   String attributeName,
                                   SelectorList<T> selectorList,
                                   Concatable<T> concatable,
                                   DependencyStack dependencyStack)

Description copied from interface: SelectorListResolver

Resolves the elements in a given SelectorList and returns the concatenated value.

Specified by:

resolveList in interface SelectorListResolver

Type Parameters:

T - the type of elements stored in the provided selectable list

buildTarget - the build target that contains the given list in its arguments

attributeName - the name of the attribute that holds the given selector list

selectorList - a list with selectable elements

concatable - to be used when concatenating select items (e. g. lists or strings)

dependencyStack - used to provide error stacks

Returns:

an object produced by concatenating resolved elements of the given list or null if the list is resolved to an absent element

resolveSelector

@Nullable
protected abstract <T> T resolveSelector(SelectableConfigurationContext configurationContext,
                                                   BuildTarget buildTarget,
                                                   DependencyStack dependencyStack,
                                                   String attributeName,
                                                   Selector<T> selector)

findMatchingConditions

protected <T> Map<Selectable,Object> findMatchingConditions(SelectableConfigurationContext configurationContext,
                                                            Selector<T> selector,
                                                            DependencyStack dependencyStack)

Returns the value for which the current configuration matches the key inside the select dictionary

assertNotMultipleMatches

protected static void assertNotMultipleMatches(Map<Selectable,?> matchingConditions,
                                               String attributeName,
                                               BuildTarget buildTarget)

Assertion that ensures that the current configuration doesn't match multiple select dictionary keys

assertSelectorHasDefault

protected static void assertSelectorHasDefault(BuildTarget buildTarget,
                                               DependencyStack dependencyStack,
                                               String attributeName,
                                               Selector<?> selector)

Assertion for the selector to contain "DEFAULT" as key inside the dictionary.