MultimapEntrySelector.java

package fr.openwide.core.jpa.more.business.difference.selector;

import java.util.Map;
import java.util.Map.Entry;

import org.apache.commons.lang3.builder.HashCodeBuilder;

import com.google.common.base.Equivalence;

import de.danielbechler.diff.selector.ElementSelector;
import de.danielbechler.util.Strings;

public class MultimapEntrySelector<K, V> extends ElementSelector implements IKeyAwareSelector<K> {
	
	private final Map.Entry<K, V> entry;
	
	private final Equivalence<? super Entry<K, V>> entryEquivalence;
	
	public MultimapEntrySelector(Map.Entry<K, V> entry, Equivalence<? super Entry<K, V>> entryEquivalence) {
		this.entry = entry;
		this.entryEquivalence = entryEquivalence;
	}

	@Override
	@SuppressWarnings("unchecked")
	public boolean equals(final Object o) {
		if (this == o) {
			return true;
		}
		if (o instanceof MultimapEntrySelector) {
			MultimapEntrySelector<?, ?> other = (MultimapEntrySelector<?, ?>)o;
			return entryEquivalence.equals(other.entryEquivalence)
					&& entryEquivalence.equivalent(entry, (Entry<K, V>) other.entry);
		}

		return false;
	}

	@Override
	public int hashCode() {
		return new HashCodeBuilder()
				.append(entryEquivalence.hash(entry))
				.build();
	}

	@Override
	public String toHumanReadableString() {
		return Strings.toSingleLineString(entry);
	}
	
	@Override
	public K getKey() {
		return entry.getKey();
	}

}