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Java example source code file (MultiDimensionalSet.java)

This example Java source code file (MultiDimensionalSet.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

concurrentskiplistset, hashset, iterator, k,v, multidimensionalset, object, override, pair, threading, threads, treeset, util

The MultiDimensionalSet.java Java example source code

/*
 *
 *  * Copyright 2015 Skymind,Inc.
 *  *
 *  *    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 org.deeplearning4j.util;

import org.deeplearning4j.berkeley.Pair;

import java.util.*;
import java.util.concurrent.ConcurrentSkipListSet;

/**
 * Created by agibsonccc on 4/29/14.
 */
public class MultiDimensionalSet<K,V> implements Set> {


    private Set<Pair backedSet;

    public MultiDimensionalSet(Set<Pair backedSet) {
        this.backedSet = backedSet;
    }

    public static <K,V> MultiDimensionalSet hashSet() {
        return new MultiDimensionalSet<K,V>(new HashSet>());
    }


    public static <K,V> MultiDimensionalSet treeSet() {
        return new MultiDimensionalSet<K,V>(new TreeSet>());
    }




    public static <K,V> MultiDimensionalSet concurrentSkipListSet() {
        return new MultiDimensionalSet<K,V>(new ConcurrentSkipListSet>());
    }

    /**
     * Returns the number of elements in this applyTransformToDestination (its cardinality).  If this
     * applyTransformToDestination contains more than <tt>Integer.MAX_VALUE elements, returns
     * <tt>Integer.MAX_VALUE.
     *
     * @return the number of elements in this applyTransformToDestination (its cardinality)
     */
    @Override
    public int size() {
        return backedSet.size();
    }

    /**
     * Returns <tt>true if this applyTransformToDestination contains no elements.
     *
     * @return <tt>true if this applyTransformToDestination contains no elements
     */
    @Override
    public boolean isEmpty() {
        return backedSet.isEmpty();
    }

    /**
     * Returns <tt>true if this applyTransformToDestination contains the specified element.
     * More formally, returns <tt>true if and only if this applyTransformToDestination
     * contains an element <tt>e such that
     * <tt>(o==null ? e==null : o.equals(e)).
     *
     * @param o element whose presence in this applyTransformToDestination is to be tested
     * @return <tt>true if this applyTransformToDestination contains the specified element
     * @throws ClassCastException   if the type of the specified element
     *                              is incompatible with this applyTransformToDestination
     *                              (<a href="Collection.html#optional-restrictions">optional)
     * @throws NullPointerException if the specified element is null and this
     *                              applyTransformToDestination does not permit null elements
     *                              (<a href="Collection.html#optional-restrictions">optional)
     */
    @Override
    public boolean contains(Object o) {
        return backedSet.contains(o);
    }

    /**
     * Returns an iterator over the elements in this applyTransformToDestination.  The elements are
     * returned in no particular order (unless this applyTransformToDestination is an instance of some
     * class that provides a guarantee).
     *
     * @return an iterator over the elements in this applyTransformToDestination
     */
    @Override
    public Iterator<Pair iterator() {
        return backedSet.iterator();
    }

    /**
     * Returns an array containing all of the elements in this applyTransformToDestination.
     * If this applyTransformToDestination makes any guarantees as to what order its elements
     * are returned by its iterator, this method must return the
     * elements in the same order.
     * <p/>
     * <p>The returned array will be "safe" in that no references to it
     * are maintained by this applyTransformToDestination.  (In other words, this method must
     * allocate a new array even if this applyTransformToDestination is backed by an array).
     * The caller is thus free to modify the returned array.
     * <p/>
     * <p>This method acts as bridge between array-based and collection-based
     * APIs.
     *
     * @return an array containing all the elements in this applyTransformToDestination
     */
    @Override
    public Object[] toArray() {
        return backedSet.toArray();
    }

    /**
     * Returns an array containing all of the elements in this applyTransformToDestination; the
     * runtime type of the returned array is that of the specified array.
     * If the applyTransformToDestination fits in the specified array, it is returned therein.
     * Otherwise, a new array is allocated with the runtime type of the
     * specified array and the size of this applyTransformToDestination.
     * <p/>
     * <p>If this applyTransformToDestination fits in the specified array with room to spare
     * (i.e., the array has more elements than this applyTransformToDestination), the element in
     * the array immediately following the end of the applyTransformToDestination is applyTransformToDestination to
     * <tt>null.  (This is useful in determining the length of this
     * applyTransformToDestination <i>only if the caller knows that this applyTransformToDestination does not contain
     * any null elements.)
     * <p/>
     * <p>If this applyTransformToDestination makes any guarantees as to what order its elements
     * are returned by its iterator, this method must return the elements
     * in the same order.
     * <p/>
     * <p>Like the {@link #toArray()} method, this method acts as bridge between
     * array-based and collection-based APIs.  Further, this method allows
     * precise control over the runtime type of the output array, and may,
     * under certain circumstances, be used to save allocation costs.
     * <p/>
     * <p>Suppose x is a applyTransformToDestination known to contain only strings.
     * The following code can be used to dump the applyTransformToDestination into a newly allocated
     * array of <tt>String:
     * <p/>
     * <pre>
     *     String[] y = x.toArray(new String[0]);</pre>
     *
     * Note that <tt>toArray(new Object[0]) is identical in function to
     * <tt>toArray().
     *
     * @param a the array into which the elements of this applyTransformToDestination are to be
     *          stored, if it is big enough; otherwise, a new array of the same
     *          runtime type is allocated for this purpose.
     * @return an array containing all the elements in this applyTransformToDestination
     * @throws ArrayStoreException  if the runtime type of the specified array
     *                              is not a supertype of the runtime type of every element in this
     *                              applyTransformToDestination
     * @throws NullPointerException if the specified array is null
     */
    @Override
    public <T> T[] toArray(T[] a) {
        return backedSet.toArray(a);
    }

    /**
     * Adds the specified element to this applyTransformToDestination if it is not already present
     * (optional operation).  More formally, adds the specified element
     * <tt>e to this applyTransformToDestination if the applyTransformToDestination contains no element e2
     * such that
     * <tt>(e==null ? e2==null : e.equals(e2)).
     * If this applyTransformToDestination already contains the element, the call leaves the applyTransformToDestination
     * unchanged and returns <tt>false.  In combination with the
     * restriction on constructors, this ensures that sets never contain
     * duplicate elements.
     * <p/>
     * <p>The stipulation above does not imply that sets must accept all
     * elements; sets may refuse to add any particular element, including
     * <tt>null, and throw an exception, as described in the
     * specification for {@link Collection#add Collection.add}.
     * Individual applyTransformToDestination implementations should clearly document any
     * restrictions on the elements that they may contain.
     *
     * @param kvPair element to be added to this applyTransformToDestination
     * @return <tt>true if this applyTransformToDestination did not already contain the specified
     * element
     * @throws UnsupportedOperationException if the <tt>add operation
     *                                       is not supported by this applyTransformToDestination
     * @throws ClassCastException            if the class of the specified element
     *                                       prevents it from being added to this applyTransformToDestination
     * @throws NullPointerException          if the specified element is null and this
     *                                       applyTransformToDestination does not permit null elements
     * @throws IllegalArgumentException      if some property of the specified element
     *                                       prevents it from being added to this applyTransformToDestination
     */
    @Override
    public boolean add(Pair<K, V> kvPair) {
        return backedSet.add(kvPair);
    }

    /**
     * Removes the specified element from this applyTransformToDestination if it is present
     * (optional operation).  More formally, removes an element <tt>e
     * such that
     * <tt>(o==null ? e==null : o.equals(e)), if
     * this applyTransformToDestination contains such an element.  Returns <tt>true if this applyTransformToDestination
     * contained the element (or equivalently, if this applyTransformToDestination changed as a
     * result of the call).  (This applyTransformToDestination will not contain the element once the
     * call returns.)
     *
     * @param o object to be removed from this applyTransformToDestination, if present
     * @return <tt>true if this applyTransformToDestination contained the specified element
     * @throws ClassCastException            if the type of the specified element
     *                                       is incompatible with this applyTransformToDestination
     *                                       (<a href="Collection.html#optional-restrictions">optional)
     * @throws NullPointerException          if the specified element is null and this
     *                                       applyTransformToDestination does not permit null elements
     *                                       (<a href="Collection.html#optional-restrictions">optional)
     * @throws UnsupportedOperationException if the <tt>remove operation
     *                                       is not supported by this applyTransformToDestination
     */
    @Override
    public boolean remove(Object o) {
        return backedSet.remove(o);
    }

    /**
     * Returns <tt>true if this applyTransformToDestination contains all of the elements of the
     * specified collection.  If the specified collection is also a applyTransformToDestination, this
     * method returns <tt>true if it is a subset of this applyTransformToDestination.
     *
     * @param c collection to be checked for containment in this applyTransformToDestination
     * @return <tt>true if this applyTransformToDestination contains all of the elements of the
     * specified collection
     * @throws ClassCastException   if the types of one or more elements
     *                              in the specified collection are incompatible with this
     *                              applyTransformToDestination
     *                              (<a href="Collection.html#optional-restrictions">optional)
     * @throws NullPointerException if the specified collection contains one
     *                              or more null elements and this applyTransformToDestination does not permit null
     *                              elements
     *                              (<a href="Collection.html#optional-restrictions">optional),
     *                              or if the specified collection is null
     * @see #contains(Object)
     */
    @Override
    public boolean containsAll(Collection<?> c) {
        return backedSet.containsAll(c);
    }

    /**
     * Adds all of the elements in the specified collection to this applyTransformToDestination if
     * they're not already present (optional operation).  If the specified
     * collection is also a applyTransformToDestination, the <tt>addAll operation effectively
     * modifies this applyTransformToDestination so that its value is the <i>union of the two
     * sets.  The behavior of this operation is undefined if the specified
     * collection is modified while the operation is in progress.
     *
     * @param c collection containing elements to be added to this applyTransformToDestination
     * @return <tt>true if this applyTransformToDestination changed as a result of the call
     * @throws UnsupportedOperationException if the <tt>addAll operation
     *                                       is not supported by this applyTransformToDestination
     * @throws ClassCastException            if the class of an element of the
     *                                       specified collection prevents it from being added to this applyTransformToDestination
     * @throws NullPointerException          if the specified collection contains one
     *                                       or more null elements and this applyTransformToDestination does not permit null
     *                                       elements, or if the specified collection is null
     * @throws IllegalArgumentException      if some property of an element of the
     *                                       specified collection prevents it from being added to this applyTransformToDestination
     * @see #add(Object)
     */
    @Override
    public boolean addAll(Collection<? extends Pair c) {
        return backedSet.addAll(c);
    }

    /**
     * Retains only the elements in this applyTransformToDestination that are contained in the
     * specified collection (optional operation).  In other words, removes
     * from this applyTransformToDestination all of its elements that are not contained in the
     * specified collection.  If the specified collection is also a applyTransformToDestination, this
     * operation effectively modifies this applyTransformToDestination so that its value is the
     * <i>intersection of the two sets.
     *
     * @param c collection containing elements to be retained in this applyTransformToDestination
     * @return <tt>true if this applyTransformToDestination changed as a result of the call
     * @throws UnsupportedOperationException if the <tt>retainAll operation
     *                                       is not supported by this applyTransformToDestination
     * @throws ClassCastException            if the class of an element of this applyTransformToDestination
     *                                       is incompatible with the specified collection
     *                                       (<a href="Collection.html#optional-restrictions">optional)
     * @throws NullPointerException          if this applyTransformToDestination contains a null element and the
     *                                       specified collection does not permit null elements
     *                                       (<a href="Collection.html#optional-restrictions">optional),
     *                                       or if the specified collection is null
     * @see #remove(Object)
     */
    @Override
    public boolean retainAll(Collection<?> c) {
        return backedSet.retainAll(c);
    }

    /**
     * Removes from this applyTransformToDestination all of its elements that are contained in the
     * specified collection (optional operation).  If the specified
     * collection is also a applyTransformToDestination, this operation effectively modifies this
     * applyTransformToDestination so that its value is the <i>asymmetric applyTransformToDestination difference of
     * the two sets.
     *
     * @param c collection containing elements to be removed from this applyTransformToDestination
     * @return <tt>true if this applyTransformToDestination changed as a result of the call
     * @throws UnsupportedOperationException if the <tt>removeAll operation
     *                                       is not supported by this applyTransformToDestination
     * @throws ClassCastException            if the class of an element of this applyTransformToDestination
     *                                       is incompatible with the specified collection
     *                                       (<a href="Collection.html#optional-restrictions">optional)
     * @throws NullPointerException          if this applyTransformToDestination contains a null element and the
     *                                       specified collection does not permit null elements
     *                                       (<a href="Collection.html#optional-restrictions">optional),
     *                                       or if the specified collection is null
     * @see #remove(Object)
     * @see #contains(Object)
     */
    @Override
    public boolean removeAll(Collection<?> c) {
        return backedSet.removeAll(c);
    }

    /**
     * Removes all of the elements from this applyTransformToDestination (optional operation).
     * The applyTransformToDestination will be empty after this call returns.
     *
     * @throws UnsupportedOperationException if the <tt>clear method
     *                                       is not supported by this applyTransformToDestination
     */
    @Override
    public void clear() {
       backedSet.clear();
    }



    public boolean contains(K k, V v) {
        return contains(new Pair<>(k,v));
    }

    public void add(K k,V v) {
        add(new Pair<>(k,v));
    }

}

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