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ImmutableBooleanEmptySet.java
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ImmutableBooleanEmptySet.java
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/*
* Copyright (c) 2018 Goldman Sachs.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Eclipse Distribution License v. 1.0 which accompany this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*/
package org.eclipse.collections.impl.set.immutable.primitive;
import java.io.IOException;
import java.io.Serializable;
import org.eclipse.collections.api.BooleanIterable;
import org.eclipse.collections.api.LazyBooleanIterable;
import org.eclipse.collections.api.RichIterable;
import org.eclipse.collections.api.bag.primitive.MutableBooleanBag;
import org.eclipse.collections.api.block.function.primitive.BooleanToObjectFunction;
import org.eclipse.collections.api.block.function.primitive.ObjectBooleanToObjectFunction;
import org.eclipse.collections.api.block.predicate.primitive.BooleanPredicate;
import org.eclipse.collections.api.block.procedure.primitive.BooleanProcedure;
import org.eclipse.collections.api.iterator.BooleanIterator;
import org.eclipse.collections.api.list.primitive.MutableBooleanList;
import org.eclipse.collections.api.set.ImmutableSet;
import org.eclipse.collections.api.set.primitive.BooleanSet;
import org.eclipse.collections.api.set.primitive.ImmutableBooleanSet;
import org.eclipse.collections.api.set.primitive.MutableBooleanSet;
import org.eclipse.collections.impl.bag.mutable.primitive.BooleanHashBag;
import org.eclipse.collections.impl.factory.Lists;
import org.eclipse.collections.impl.factory.Sets;
import org.eclipse.collections.impl.iterator.ImmutableEmptyBooleanIterator;
import org.eclipse.collections.impl.lazy.primitive.LazyBooleanIterableAdapter;
import org.eclipse.collections.impl.list.mutable.primitive.BooleanArrayList;
import org.eclipse.collections.impl.set.mutable.primitive.BooleanHashSet;
final class ImmutableBooleanEmptySet implements ImmutableBooleanSet, Serializable
{
static final ImmutableBooleanSet INSTANCE = new ImmutableBooleanEmptySet();
private static final boolean[] TO_ARRAY = new boolean[0];
private ImmutableBooleanEmptySet()
{
// Singleton
}
@Override
public ImmutableBooleanSet newWith(boolean element)
{
return element ? ImmutableTrueSet.INSTANCE : ImmutableFalseSet.INSTANCE;
}
@Override
public ImmutableBooleanSet newWithout(boolean element)
{
return this;
}
@Override
public ImmutableBooleanSet newWithAll(BooleanIterable elements)
{
ImmutableBooleanSet result = this;
BooleanIterator booleanIterator = elements.booleanIterator();
while (booleanIterator.hasNext())
{
result = result.newWith(booleanIterator.next());
}
return result;
}
@Override
public ImmutableBooleanSet newWithoutAll(BooleanIterable elements)
{
return this;
}
@Override
public BooleanIterator booleanIterator()
{
return ImmutableEmptyBooleanIterator.INSTANCE;
}
@Override
public void forEach(BooleanProcedure procedure)
{
}
/**
* @since 7.0.
*/
@Override
public void each(BooleanProcedure procedure)
{
}
@Override
public <T> T injectInto(T injectedValue, ObjectBooleanToObjectFunction<? super T, ? extends T> function)
{
return injectedValue;
}
@Override
public RichIterable<BooleanIterable> chunk(int size)
{
return Lists.immutable.empty();
}
@Override
public int count(BooleanPredicate predicate)
{
return 0;
}
@Override
public boolean anySatisfy(BooleanPredicate predicate)
{
return false;
}
@Override
public boolean allSatisfy(BooleanPredicate predicate)
{
return true;
}
@Override
public boolean noneSatisfy(BooleanPredicate predicate)
{
return false;
}
@Override
public ImmutableBooleanSet select(BooleanPredicate predicate)
{
return this;
}
@Override
public ImmutableBooleanSet reject(BooleanPredicate predicate)
{
return this;
}
@Override
public boolean detectIfNone(BooleanPredicate predicate, boolean ifNone)
{
return ifNone;
}
@Override
public <V> ImmutableSet<V> collect(BooleanToObjectFunction<? extends V> function)
{
return Sets.immutable.with();
}
@Override
public boolean[] toArray()
{
return TO_ARRAY;
}
@Override
public boolean contains(boolean value)
{
return false;
}
@Override
public boolean containsAll(boolean... source)
{
return source.length == 0;
}
@Override
public boolean containsAll(BooleanIterable source)
{
BooleanIterator iterator = source.booleanIterator();
return !iterator.hasNext();
}
@Override
public BooleanSet freeze()
{
return this;
}
@Override
public ImmutableBooleanSet toImmutable()
{
return this;
}
@Override
public int size()
{
return 0;
}
@Override
public boolean isEmpty()
{
return true;
}
@Override
public boolean notEmpty()
{
return false;
}
@Override
public boolean equals(Object obj)
{
if (this == obj)
{
return true;
}
if (!(obj instanceof BooleanSet))
{
return false;
}
BooleanSet other = (BooleanSet) obj;
return other.isEmpty();
}
@Override
public int hashCode()
{
return 0;
}
@Override
public String toString()
{
return "[]";
}
@Override
public String makeString()
{
return "";
}
@Override
public String makeString(String separator)
{
return "";
}
@Override
public String makeString(String start, String separator, String end)
{
return start + end;
}
@Override
public void appendString(Appendable appendable)
{
}
@Override
public void appendString(Appendable appendable, String separator)
{
}
@Override
public void appendString(Appendable appendable, String start, String separator, String end)
{
try
{
appendable.append(start);
appendable.append(end);
}
catch (IOException e)
{
throw new RuntimeException(e);
}
}
@Override
public MutableBooleanList toList()
{
return BooleanArrayList.newList(this);
}
@Override
public MutableBooleanSet toSet()
{
return BooleanHashSet.newSet(this);
}
@Override
public MutableBooleanBag toBag()
{
return BooleanHashBag.newBag(this);
}
@Override
public LazyBooleanIterable asLazy()
{
return new LazyBooleanIterableAdapter(this);
}
private Object writeReplace()
{
return new ImmutableBooleanSetSerializationProxy(this);
}
}