com.github.harbby.dsxparser.tree.QualifiedName Maven / Gradle / Ivy
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package com.github.harbby.dsxparser.tree;
import com.github.harbby.gadtry.base.Iterators;
import java.util.*;
import static com.github.harbby.gadtry.base.Iterators.isEmpty;
import static com.github.harbby.gadtry.base.MoreObjects.checkArgument;
import static java.util.Locale.ENGLISH;
import static java.util.Objects.requireNonNull;
public class QualifiedName {
private final List parts;
private final List originalParts;
public static QualifiedName of(String first, String... rest) {
requireNonNull(first, "first is null");
List list = new ArrayList<>();
list.add(first);
Collections.addAll(list, rest);
return of(list);
}
public static QualifiedName of(String name) {
requireNonNull(name, "name is null");
return of(List.of(name));
}
public static QualifiedName of(Collection originalParts) {
requireNonNull(originalParts, "originalParts is null");
checkArgument(!isEmpty(originalParts), "originalParts is empty");
List parts = originalParts.stream().map(part -> part.toLowerCase(ENGLISH)).toList();
return new QualifiedName(List.copyOf(originalParts), parts);
}
private QualifiedName(List originalParts, List parts) {
this.originalParts = originalParts;
this.parts = parts;
}
public List getParts() {
return parts;
}
public List getOriginalParts() {
return originalParts;
}
@Override
public String toString() {
return String.join(".", parts);
}
/**
* For an identifier of the form "a.b.c.d", returns "a.b.c"
* For an identifier of the form "a", returns absent
*
* @return QualifiedName
*/
public Optional getPrefix() {
if (parts.size() == 1) {
return Optional.empty();
}
List subList = parts.subList(0, parts.size() - 1);
return Optional.of(new QualifiedName(subList, subList));
}
public boolean hasSuffix(QualifiedName suffix) {
if (parts.size() < suffix.getParts().size()) {
return false;
}
int start = parts.size() - suffix.getParts().size();
return parts.subList(start, parts.size()).equals(suffix.getParts());
}
public String getSuffix() {
return Iterators.getLast(parts);
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
return parts.equals(((QualifiedName) o).parts);
}
@Override
public int hashCode() {
return parts.hashCode();
}
}