package org.eclipse.collections.impl.map.sorted.immutable;
import java.io.Serializable;
import java.util.Collection;
import java.util.Comparator;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.Optional;
import java.util.Set;
import org.eclipse.collections.api.RichIterable;
import org.eclipse.collections.api.block.function.Function;
import org.eclipse.collections.api.block.function.Function0;
import org.eclipse.collections.api.block.function.Function2;
import org.eclipse.collections.api.block.predicate.Predicate2;
import org.eclipse.collections.api.block.procedure.Procedure;
import org.eclipse.collections.api.block.procedure.Procedure2;
import org.eclipse.collections.api.block.procedure.primitive.ObjectIntProcedure;
import org.eclipse.collections.api.factory.Lists;
import org.eclipse.collections.api.factory.Maps;
import org.eclipse.collections.api.factory.Sets;
import org.eclipse.collections.api.factory.SortedMaps;
import org.eclipse.collections.api.map.ImmutableMap;
import org.eclipse.collections.api.map.sorted.ImmutableSortedMap;
import org.eclipse.collections.api.tuple.Pair;
import org.eclipse.collections.impl.utility.LazyIterate;
final class ImmutableEmptySortedMap<K, V>
extends AbstractImmutableSortedMap<K, V>
implements Serializable
{
static final ImmutableSortedMap<?, ?> INSTANCE = new ImmutableEmptySortedMap<>();
private static final long serialVersionUID = 2L;
private final Comparator<? super K> comparator;
ImmutableEmptySortedMap()
{
this.comparator = null;
}
ImmutableEmptySortedMap(Comparator<? super K> comparator)
{
this.comparator = comparator;
}
@Override
public int size()
{
return 0;
}
@Override
public RichIterable<K> keysView()
{
return LazyIterate.empty();
}
@Override
public RichIterable<V> valuesView()
{
return LazyIterate.empty();
}
@Override
public RichIterable<Pair<K, V>> keyValuesView()
{
return LazyIterate.empty();
}
@Override
public boolean containsKey(Object key)
{
return false;
}
@Override
public boolean containsValue(Object value)
{
return false;
}
@Override
public V get(Object key)
{
return null;
}
@Override
public String toString()
{
return "{}";
}
@Override
public boolean equals(Object other)
{
if (!(other instanceof Map))
{
return false;
}
return ((Map<K, V>) other).isEmpty();
}
@Override
public int hashCode()
{
return 0;
}
@Override
public ImmutableSortedMap<K, V> tap(Procedure<? super V> procedure)
{
return this;
}
@Override
public void forEachKeyValue(Procedure2<? super K, ? super V> procedure)
{
}
@Override
public ImmutableMap<V, K> flipUniqueValues()
{
return Maps.immutable.with();
}
@Override
public void forEachKey(Procedure<? super K> procedure)
{
}
@Override
public void forEachValue(Procedure<? super V> procedure)
{
}
@Override
public void forEachWithIndex(ObjectIntProcedure<? super V> objectIntProcedure)
{
}
@Override
public <P> void forEachWith(Procedure2<? super V, ? super P> procedure, P parameter)
{
}
@Override
public boolean isEmpty()
{
return true;
}
@Override
public boolean notEmpty()
{
return false;
}
@Override
public <A> A ifPresentApply(K key, Function<? super V, ? extends A> function)
{
return null;
}
@Override
public V getIfAbsent(K key, Function0<? extends V> function)
{
return function.value();
}
@Override
public V getIfAbsentValue(K key, V value)
{
return value;
}
@Override
public <P> V getIfAbsentWith(
K key,
Function<? super P, ? extends V> function,
P parameter)
{
return function.valueOf(parameter);
}
@Override
public <K2, V2> ImmutableMap<K2, V2> collect(Function2<? super K, ? super V, Pair<K2, V2>> function)
{
return Maps.immutable.empty();
}
@Override
public <R> ImmutableSortedMap<K, R> collectValues(Function2<? super K, ? super V, ? extends R> function)
{
return SortedMaps.immutable.with(this.comparator);
}
@Override
public Pair<K, V> detect(Predicate2<? super K, ? super V> predicate)
{
return null;
}
@Override
public Optional<Pair<K, V>> detectOptional(Predicate2<? super K, ? super V> predicate)
{
return Optional.empty();
}
@Override
public ImmutableSortedMap<K, V> reject(Predicate2<? super K, ? super V> predicate)
{
return this;
}
@Override
public Set<Entry<K, V>> entrySet()
{
return Sets.immutable.<Entry<K, V>>with().castToSet();
}
@Override
public ImmutableSortedMap<K, V> select(Predicate2<? super K, ? super V> predicate)
{
return this;
}
@Override
public Comparator<? super K> comparator()
{
return this.comparator;
}
@Override
public Set<K> keySet()
{
return Sets.immutable.<K>of().castToSet();
}
@Override
public Collection<V> values()
{
return Lists.immutable.<V>empty().castToList();
}
@Override
public K firstKey()
{
throw new NoSuchElementException();
}
@Override
public K lastKey()
{
throw new NoSuchElementException();
}
private Object writeReplace()
{
return new ImmutableSortedMapSerializationProxy<>(this);
}
@Override
public ImmutableSortedMap<K, V> take(int count)
{
if (count < 0)
{
throw new IllegalArgumentException("Count must be greater than zero, but was: " + count);
}
return this;
}
@Override
public ImmutableSortedMap<K, V> drop(int count)
{
if (count < 0)
{
throw new IllegalArgumentException("Count must be greater than zero, but was: " + count);
}
return this;
}
@Override
public V getOnly()
{
throw new IllegalStateException("Size must be 1 but was " + this.size());
}
}