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JHipster Lite

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package tech.jhipster.lite.module.domain.javadependency;

import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.function.Function;
import java.util.stream.Collectors;
import tech.jhipster.lite.module.domain.javabuild.VersionSlug;
import tech.jhipster.lite.shared.error.domain.Assert;

public class JavaDependenciesVersions {

  public static final JavaDependenciesVersions EMPTY = new JavaDependenciesVersions(List.of());

  private final Map versions;

  public JavaDependenciesVersions(Collection versions) {
    Assert.field("versions", versions).notNull().noNullElement();

    this.versions = versions.stream().collect(Collectors.toUnmodifiableMap(version -> version.slug().propertyName(), Function.identity()));
  }

  private JavaDependenciesVersions(Map versions) {
    this.versions = Collections.unmodifiableMap(versions);
  }

  public JavaDependencyVersion get(VersionSlug slug) {
    Assert.notNull("slug", slug);

    return Optional.ofNullable(versions.get(slug.propertyName())).orElseThrow(() -> new UnknownJavaVersionSlugException(slug));
  }

  public JavaDependenciesVersions merge(JavaDependenciesVersions other) {
    Assert.notNull("other", other);

    Map mergedVersions = new HashMap<>(other.versions);
    mergedVersions.putAll(versions);

    return new JavaDependenciesVersions(mergedVersions);
  }
}