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GS Collections is a collections framework for Java. It has JDK-compatible List, Set and Map implementations with a rich API and set of utility classes that work with any JDK compatible Collections, Arrays, Maps or Strings. The iteration protocol was inspired by the Smalltalk collection framework.

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/*
 * Copyright 2014 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.map.immutable.primitive;

import com.gs.collections.api.block.procedure.primitive.DoubleProcedure;
import com.gs.collections.api.factory.map.primitive.ImmutableDoubleObjectMapFactory;
import com.gs.collections.api.map.primitive.ImmutableDoubleObjectMap;
import com.gs.collections.api.map.primitive.DoubleObjectMap;

/**
 * ImmutableDoubleObjectMapFactoryImpl is a factory implementation which creates instances of type {@link ImmutableDoubleObjectMap}.
 * This file was automatically generated from template file immutablePrimitiveObjectMapFactoryImpl.stg.
 *
 * @since 4.0.
 */
public class ImmutableDoubleObjectMapFactoryImpl implements ImmutableDoubleObjectMapFactory
{
    public  ImmutableDoubleObjectMap of()
    {
        return this.with();
    }

    public  ImmutableDoubleObjectMap with()
    {
        return (ImmutableDoubleObjectMap) ImmutableDoubleObjectEmptyMap.INSTANCE;
    }

    public  ImmutableDoubleObjectMap of(double key, V value)
    {
        return this.with(key, value);
    }

    public  ImmutableDoubleObjectMap with(double key, V value)
    {
        return new ImmutableDoubleObjectSingletonMap(key, value);
    }

    public  ImmutableDoubleObjectMap ofAll(DoubleObjectMap map)
    {
        return this.withAll(map);
    }

    public  ImmutableDoubleObjectMap withAll(DoubleObjectMap map)
    {
        if (map instanceof ImmutableDoubleObjectMap)
        {
            return (ImmutableDoubleObjectMap) map;
        }
        if (map.isEmpty())
        {
            return this.with();
        }
        if (map.size() == 1)
        {
            //TODO use keysView() when available.
            final double[] array = new double[1];
            map.forEachKey(new DoubleProcedure()
            {
                public void value(double each)
                {
                    array[0] = each;
                }
            });
            return new ImmutableDoubleObjectSingletonMap(array[0], map.get(array[0]));
        }
        return new ImmutableDoubleObjectHashMap(map);
    }
}