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Java 1.8+ Library with tons of utility classes required in all projects
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/*
* Copyright (C) 2014-2024 Philip Helger (www.helger.com)
* philip[at]helger[dot]com
*
* 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.helger.commons.collection.impl;
import java.util.Collection;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.function.Function;
import java.util.function.Predicate;
import javax.annotation.Nonnegative;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import com.helger.commons.annotation.ReturnsMutableCopy;
import com.helger.commons.collection.ArrayHelper;
import com.helger.commons.collection.CollectionHelper;
/**
* A special {@link HashSet} implementation based on {@link ICommonsSet}.
*
* @author Philip Helger
* @param
* Set element type
*/
public class CommonsHashSet extends HashSet implements ICommonsSet
{
public CommonsHashSet ()
{}
public CommonsHashSet (final int nInitialCapacity)
{
super (nInitialCapacity);
}
public CommonsHashSet (final int nInitialCapacity, @Nonnegative final float fLoadFactor)
{
super (nInitialCapacity, fLoadFactor);
}
public CommonsHashSet (@Nullable final Collection aCont)
{
super (CollectionHelper.getSize (aCont));
if (aCont != null)
addAll (aCont);
}
public CommonsHashSet (@Nullable final Iterable aIterable)
{
addAll (aIterable);
}
public CommonsHashSet (@Nullable final Enumeration aIterable)
{
addAll (aIterable);
}
public CommonsHashSet (@Nullable final Collection aValues,
@Nonnull final Function aMapper)
{
super (CollectionHelper.getSize (aValues));
addAllMapped (aValues, aMapper);
}
public CommonsHashSet (@Nullable final Iterable aValues,
@Nonnull final Function aMapper)
{
addAllMapped (aValues, aMapper);
}
public CommonsHashSet (@Nullable final ELEMENTTYPE aValue)
{
super (1);
add (aValue);
}
@SafeVarargs
public CommonsHashSet (@Nullable final ELEMENTTYPE... aValues)
{
super (ArrayHelper.getSize (aValues));
addAll (aValues);
}
public CommonsHashSet (@Nullable final SRCTYPE [] aValues,
@Nonnull final Function aMapper)
{
super (ArrayHelper.getSize (aValues));
addAllMapped (aValues, aMapper);
}
@Override
@Nonnull
@ReturnsMutableCopy
public CommonsHashSet createInstance ()
{
return new CommonsHashSet <> ();
}
@Nonnull
@ReturnsMutableCopy
public CommonsHashSet getClone ()
{
return new CommonsHashSet <> (this);
}
/**
* Create a new hash set that contains a subset of the provided iterable.
* Note: this method is a static factory method because the compiler sometimes
* cannot deduce between {@link Predicate} and {@link Function} and the
* mapping case occurs more often.
*
* @param aValues
* The iterable from which the elements are copied from. May be
* null.
* @param aFilter
* The filter to be applied to check if the element should be added or
* not.
* @return The created hash set. Never null.
* @see #addAll(Iterable, Predicate)
* @since 10.0.0
* @param
* data type to create the list of
*/
@Nonnull
@ReturnsMutableCopy
public static CommonsHashSet createFiltered (@Nullable final Iterable aValues,
@Nullable final Predicate aFilter)
{
final CommonsHashSet ret = new CommonsHashSet <> ();
ret.addAll (aValues, aFilter);
return ret;
}
/**
* Create a new hash set that contains a subset of the provided iterable. This
* method filters the elements before they are mapped.
* Note: this method is a static factory method because the compiler sometimes
* cannot deduce between {@link Predicate} and {@link Function} and the
* mapping case occurs more often.
*
* @param aValues
* The iterable from which the elements are copied from. May be
* null.
* @param aFilter
* The filter to be applied to check if the element should be added or
* not.
* @param aMapper
* The mapping function to be executed for all provided elements. May
* not be null.
* @return The created hash set. Never null.
* @see #addAllMapped(Iterable, Predicate, Function)
* @since 10.0.0
* @param
* source data type
* @param
* final data type of the list
*/
@Nonnull
@ReturnsMutableCopy
public static CommonsHashSet createFiltered (@Nullable final Iterable aValues,
@Nullable final Predicate aFilter,
@Nonnull final Function aMapper)
{
final CommonsHashSet ret = new CommonsHashSet <> (CollectionHelper.getSize (aValues));
ret.addAllMapped (aValues, aFilter, aMapper);
return ret;
}
/**
* Create a new hash set that contains a subset of the provided iterable. This
* method maps the elements before they are filtered.
* Note: this method is a static factory method because the compiler sometimes
* cannot deduce between {@link Predicate} and {@link Function} and the
* mapping case occurs more often.
*
* @param aValues
* The iterable from which the elements are copied from. May be
* null.
* @param aMapper
* The mapping function to be executed for all provided elements. May
* not be null.
* @param aFilter
* The filter to be applied on the mapped element to check if the
* element should be added or not.
* @return The created hash set. Never null.
* @see #addAllMapped(Iterable, Function, Predicate)
* @since 10.0.0
* @param
* source data type
* @param
* final data type of the list
*/
@Nonnull
@ReturnsMutableCopy
public static CommonsHashSet createFiltered (@Nullable final Iterable aValues,
@Nonnull final Function aMapper,
@Nullable final Predicate aFilter)
{
final CommonsHashSet ret = new CommonsHashSet <> (CollectionHelper.getSize (aValues));
ret.addAllMapped (aValues, aMapper, aFilter);
return ret;
}
/**
* Create a new hash set that contains a subset of the provided array.
* Note: this method is a static factory method because the compiler sometimes
* cannot deduce between {@link Predicate} and {@link Function} and the
* mapping case occurs more often.
*
* @param aValues
* The array from which the elements are copied from. May be
* null.
* @param aFilter
* The filter to be applied to check if the element should be added or
* not.
* @return The created hash set. Never null.
* @since 10.0.0
* @see #addAll(Object[], Predicate)
* @param
* data type of the list
*/
@Nonnull
@ReturnsMutableCopy
public static CommonsHashSet createFiltered (@Nullable final ELEMENTTYPE [] aValues,
@Nullable final Predicate aFilter)
{
final CommonsHashSet ret = new CommonsHashSet <> (ArrayHelper.getSize (aValues));
ret.addAll (aValues, aFilter);
return ret;
}
/**
* Create a new hash set that contains a subset of the provided array. This
* method filters the elements before they are mapped.
* Note: this method is a static factory method because the compiler sometimes
* cannot deduce between {@link Predicate} and {@link Function} and the
* mapping case occurs more often.
*
* @param aValues
* The array from which the elements are copied from. May be
* null.
* @param aFilter
* The filter to be applied to check if the element should be added or
* not.
* @param aMapper
* The mapping function to be executed for all provided elements. May
* not be null.
* @return The created hash set. Never null.
* @see #addAllMapped(Object[], Predicate, Function)
* @since 10.0.0
* @param
* source data type
* @param
* final data type of the list
*/
@Nonnull
@ReturnsMutableCopy
public static CommonsHashSet createFiltered (@Nullable final SRCTYPE [] aValues,
@Nullable final Predicate aFilter,
@Nonnull final Function aMapper)
{
final CommonsHashSet ret = new CommonsHashSet <> (ArrayHelper.getSize (aValues));
ret.addAllMapped (aValues, aFilter, aMapper);
return ret;
}
/**
* Create a new hash set that contains a subset of the provided array. This
* method maps the elements before they are filtered.
* Note: this method is a static factory method because the compiler sometimes
* cannot deduce between {@link Predicate} and {@link Function} and the
* mapping case occurs more often.
*
* @param aValues
* The array from which the elements are copied from. May be
* null.
* @param aMapper
* The mapping function to be executed for all provided elements. May
* not be null.
* @param aFilter
* The filter to be applied on the mapped element to check if the
* element should be added or not.
* @return The created hash set. Never null.
* @see #addAllMapped(Iterable, Function, Predicate)
* @since 10.0.0
* @param
* source data type
* @param
* final data type of the list
*/
@Nonnull
@ReturnsMutableCopy
public static CommonsHashSet createFiltered (@Nullable final SRCTYPE [] aValues,
@Nonnull final Function aMapper,
@Nullable final Predicate aFilter)
{
final CommonsHashSet ret = new CommonsHashSet <> (ArrayHelper.getSize (aValues));
ret.addAllMapped (aValues, aMapper, aFilter);
return ret;
}
}