55 lines
1.1 KiB
Java
55 lines
1.1 KiB
Java
package eu.dnetlib.pace.model.gt;
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import java.util.Collection;
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import java.util.HashSet;
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import com.google.common.collect.ComparisonChain;
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import com.google.common.collect.Ordering;
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import com.google.common.collect.Sets;
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import com.google.gson.Gson;
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public class Authors extends HashSet<Author> implements Comparable<Authors> {
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private static final long serialVersionUID = -6878376220805286142L;
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public Authors() {
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super();
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}
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public Authors(final Collection<Author> authors) {
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super(authors);
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}
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public Authors(final Author author) {
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super(Sets.newHashSet(author));
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}
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@Override
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public int compareTo(final Authors a) {
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return ComparisonChain.start()
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.compare(this.size(), a.size(), Ordering.natural().nullsLast())
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.result();
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}
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@Override
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public String toString() {
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return new Gson().toJson(this);
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}
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@Override
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public boolean equals(final Object o) {
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final boolean res = o instanceof Authors;
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return res && (Sets.intersection(this, (Authors) o).size() == this.size());
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}
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@Override
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public int hashCode() {
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int res = 0;
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for (final Author a : this) {
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res += a.hashCode();
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}
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return res;
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}
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}
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