package org.apache.maven.internal.impl;

import java.util.AbstractList;
import java.util.List;
import java.util.function.Function;

public class MappedList<U, V> extends AbstractList<U> {
    private final List<V> list;
    private final Function<V, U> mapper;

    public MappedList(List<V> list, Function<V, U> mapper) {
        this.list = list;
        this.mapper = mapper;
    }

    @Override
    public U get(int index) {

package org.apache.maven.internal.impl;

import java.util.AbstractList;
import java.util.List;
import java.util.function.Function;

public class MappedList<U, V> extends AbstractList<U> {
    private final List<V> list;
    private final Function<V, U> mapper;

    public MappedList(List<V> list, Function<V, U> mapper) {
        this.list = list;
        this.mapper = mapper;
    }

    @Override
    public U get(int index) {

        List<org.apache.maven.toolchain.Toolchain> toolchains =
                toolchainManagerPrivate.getToolchains(s, type, requirements);
        return new MappedList<>(toolchains, this::toToolchain);
    }

    @Override
    public Optional<Toolchain> getToolchainFromBuildContext(Session session, String type)
            throws ToolchainManagerException {

        return new MappedList<>(getModel().getDependencies(), this::toDependency);
    }

    @Nonnull
    @Override
    public List<DependencyCoordinate> getManagedDependencies() {
        DependencyManagement dependencyManagement = getModel().getDependencyManagement();
        if (dependencyManagement != null) {
            return new MappedList<>(dependencyManagement.getDependencies(), this::toDependency);

    }

    @Override
    public List<Node> getChildren() {
        return new MappedList<>(node.getChildren(), n -> session.getNode(n, verbose));
    }

    @Override
    public List<RemoteRepository> getRemoteRepositories() {
        return new MappedList<>(node.getRepositories(), session::getRemoteRepository);
    }

    @Override
    public Optional<RemoteRepository> getRepository() {

    }

    @Override
    public List<Node> getChildren() {
        return new MappedList<>(node.getChildren(), n -> session.getNode(n, verbose));
    }

    @Override
    public List<RemoteRepository> getRemoteRepositories() {
        return new MappedList<>(node.getRepositories(), session::getRemoteRepository);
    }

    @Override
    public Optional<RemoteRepository> getRepository() {

        return Collections.unmodifiableList(new MappedList<>(
                ((DefaultProject) project).getProject().getRemoteProjectRepositories(), session::getRemoteRepository));
    }

    @Override
    public List<RemoteRepository> getRemotePluginRepositories(Project project) {
        return Collections.unmodifiableList(new MappedList<>(

                    return result.getEffectiveToolchains().getDelegate();
                }

                @Override
                public List<BuilderProblem> getProblems() {
                    return new MappedList<>(result.getProblems(), MappedBuilderProblem::new);
                }
            };
        } catch (ToolchainsBuildingException e) {
            throw new ToolchainsBuilderException("Unable to build Toolchains", e);

                    return result.getEffectiveSettings().getDelegate();
                }

                @Override
                public List<BuilderProblem> getProblems() {
                    return new MappedList<>(result.getProblems(), MappedBuilderProblem::new);
                }
            };
        } catch (SettingsBuildingException e) {
            throw new SettingsBuilderException("Unable to build settings", e);
        }