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Access to the Neo4j graph database through Java
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/*
 * Copyright (c) 2002-2019 "Neo4j,"
 * Neo4j Sweden AB [http://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * 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.neo4j.driver.internal.value;

import java.util.Map;

import org.neo4j.driver.internal.types.InternalTypeSystem;
import org.neo4j.driver.internal.util.Extract;
import org.neo4j.driver.Value;
import org.neo4j.driver.Values;
import org.neo4j.driver.types.Type;
import java.util.function.Function;

import static org.neo4j.driver.internal.util.Format.formatPairs;
import static org.neo4j.driver.Values.ofObject;
import static org.neo4j.driver.Values.ofValue;

public class MapValue extends ValueAdapter
{
    private final Map val;

    public MapValue( Map val )
    {
        if ( val == null )
        {
            throw new IllegalArgumentException( "Cannot construct MapValue from null" );
        }
        this.val = val;
    }

    @Override
    public boolean isEmpty()
    {
        return val.isEmpty();
    }

    @Override
    public Map asObject()
    {
        return asMap( ofObject() );
    }

    @Override
    public Map asMap()
    {
        return Extract.map( val, ofObject() );
    }

    @Override
    public  Map asMap( Function mapFunction )
    {
        return Extract.map( val, mapFunction );
    }

    @Override
    public int size()
    {
        return val.size();
    }

    @Override
    public boolean containsKey( String key )
    {
        return val.containsKey( key );
    }

    @Override
    public Iterable keys()
    {
        return val.keySet();
    }

    @Override
    public Iterable values()
    {
        return val.values();
    }

    @Override
    public  Iterable values( Function mapFunction )
    {
        return Extract.map( val, mapFunction ).values();
    }

    @Override
    public Value get( String key )
    {
        Value value = val.get( key );
        return value == null ? Values.NULL: value;
    }

    @Override
    public String toString()
    {
        return formatPairs( asMap( ofValue() ) );
    }

    @Override
    public Type type()
    {
        return InternalTypeSystem.TYPE_SYSTEM.MAP();
    }

    @Override
    public boolean equals( Object o )
    {
        if ( this == o )
        {
            return true;
        }
        if ( o == null || getClass() != o.getClass() )
        {
            return false;
        }

        MapValue values = (MapValue) o;
        return val.equals( values.val );
    }

    @Override
    public int hashCode()
    {
        return val.hashCode();
    }
}