/*
* Copyright 2013 Goldman Sachs.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.gs.collections.impl.set.immutable.primitive;
import java.io.IOException;
import java.io.Serializable;
import java.util.NoSuchElementException;
import com.gs.collections.api.BooleanIterable;
import com.gs.collections.api.LazyBooleanIterable;
import com.gs.collections.api.bag.primitive.MutableBooleanBag;
import com.gs.collections.api.block.function.primitive.BooleanToObjectFunction;
import com.gs.collections.api.block.function.primitive.ObjectBooleanToObjectFunction;
import com.gs.collections.api.block.predicate.primitive.BooleanPredicate;
import com.gs.collections.api.block.procedure.primitive.BooleanProcedure;
import com.gs.collections.api.iterator.BooleanIterator;
import com.gs.collections.api.list.primitive.MutableBooleanList;
import com.gs.collections.api.set.ImmutableSet;
import com.gs.collections.api.set.primitive.BooleanSet;
import com.gs.collections.api.set.primitive.ImmutableBooleanSet;
import com.gs.collections.api.set.primitive.MutableBooleanSet;
import com.gs.collections.impl.bag.mutable.primitive.BooleanHashBag;
import com.gs.collections.impl.factory.Sets;
import com.gs.collections.impl.lazy.primitive.LazyBooleanIterableAdapter;
import com.gs.collections.impl.list.mutable.primitive.BooleanArrayList;
import com.gs.collections.impl.set.mutable.primitive.BooleanHashSet;
import net.jcip.annotations.Immutable;
@Immutable
final class ImmutableBooleanEmptySet implements ImmutableBooleanSet, Serializable
{
static final ImmutableBooleanSet INSTANCE = new ImmutableBooleanEmptySet();
private static final boolean[] TO_ARRAY = new boolean[0];
private static final BooleanIterator ITERATOR = new BooleanIterator()
{
public boolean next()
{
throw new NoSuchElementException();
}
public boolean hasNext()
{
return false;
}
};
private ImmutableBooleanEmptySet()
{
// Singleton
}
public ImmutableBooleanSet newWith(boolean element)
{
return element ? ImmutableTrueSet.INSTANCE : ImmutableFalseSet.INSTANCE;
}
public ImmutableBooleanSet newWithout(boolean element)
{
return this;
}
public ImmutableBooleanSet newWithAll(BooleanIterable elements)
{
ImmutableBooleanSet result = this;
BooleanIterator booleanIterator = elements.booleanIterator();
while (booleanIterator.hasNext())
{
result = result.newWith(booleanIterator.next());
}
return result;
}
public ImmutableBooleanSet newWithoutAll(BooleanIterable elements)
{
return this;
}
public BooleanIterator booleanIterator()
{
return ITERATOR;
}
public void forEach(BooleanProcedure procedure)
{
}
public <T> T injectInto(T injectedValue, ObjectBooleanToObjectFunction<? super T, ? extends T> function)
{
return injectedValue;
}
public int count(BooleanPredicate predicate)
{
return 0;
}
public boolean anySatisfy(BooleanPredicate predicate)
{
return false;
}
public boolean allSatisfy(BooleanPredicate predicate)
{
return true;
}
public boolean noneSatisfy(BooleanPredicate predicate)
{
return false;
}
public ImmutableBooleanSet select(BooleanPredicate predicate)
{
return this;
}
public ImmutableBooleanSet reject(BooleanPredicate predicate)
{
return this;
}
public boolean detectIfNone(BooleanPredicate predicate, boolean ifNone)
{
return ifNone;
}
public <V> ImmutableSet<V> collect(BooleanToObjectFunction<? extends V> function)
{
return Sets.immutable.with();
}
public boolean[] toArray()
{
return TO_ARRAY;
}
public boolean contains(boolean value)
{
return false;
}
public boolean containsAll(boolean... source)
{
return source.length == 0;
}
public boolean containsAll(BooleanIterable source)
{
BooleanIterator iterator = source.booleanIterator();
return !iterator.hasNext();
}
public BooleanSet freeze()
{
return this;
}
public ImmutableBooleanSet toImmutable()
{
return this;
}
public int size()
{
return 0;
}
public boolean isEmpty()
{
return true;
}
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 "[]";
}
public String makeString()
{
return "";
}
public String makeString(String separator)
{
return "";
}
public String makeString(String start, String separator, String end)
{
return start + end;
}
public void appendString(Appendable appendable)
{
}
public void appendString(Appendable appendable, String separator)
{
}
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);
}
}
public MutableBooleanList toList()
{
return BooleanArrayList.newList(this);
}
public MutableBooleanSet toSet()
{
return BooleanHashSet.newSet(this);
}
public MutableBooleanBag toBag()
{
return BooleanHashBag.newBag(this);
}
public LazyBooleanIterable asLazy()
{
return new LazyBooleanIterableAdapter(this);
}
private Object writeReplace()
{
return new ImmutableBooleanSetSerializationProxy(this);
}
}