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/*
 * Copyright (c) 2002-2017 "Neo Technology,"
 * Network Engine for Objects in Lund AB [http://neotechnology.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 org.neo4j.driver.internal.types.InternalTypeSystem;
import org.neo4j.driver.v1.types.Type;

public abstract class BooleanValue extends ScalarValueAdapter
{
    private BooleanValue()
    {
        //do nothing
    }

    public static BooleanValue TRUE = new TrueValue();
    public static BooleanValue FALSE = new FalseValue();

    public static BooleanValue fromBoolean( boolean value )
    {
        return value ? TRUE : FALSE;
    }

    @Override
    public abstract Boolean asObject();

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

    @Override
    public int hashCode()
    {
        Boolean value = asBoolean() ? Boolean.TRUE : Boolean.FALSE;
        return value.hashCode();
    }

    private static class TrueValue extends BooleanValue {

        @Override
        public Boolean asObject()
        {
            return Boolean.TRUE;
        }

        @Override
        public boolean asBoolean()
        {
            return true;
        }

        @Override
        public boolean isTrue()
        {
            return true;
        }

        @Override
        public boolean isFalse()
        {
            return false;
        }

        @SuppressWarnings("EqualsWhichDoesntCheckParameterClass")
        @Override
        public boolean equals( Object obj )
        {
            return obj == TRUE;
        }

        @Override
        public String asLiteralString()
        {
            return "TRUE";
        }
    }

    private static class FalseValue extends BooleanValue
    {
        @Override
        public Boolean asObject()
        {
            return Boolean.FALSE;
        }

        @Override
        public boolean asBoolean()
        {
            return false;
        }

        @Override
        public boolean isTrue()
        {
            return false;
        }

        @Override
        public boolean isFalse()
        {
            return true;
        }

        @SuppressWarnings("EqualsWhichDoesntCheckParameterClass")
        @Override
        public boolean equals( Object obj )
        {
            return obj == FALSE;
        }

        @Override
        public String asLiteralString()
        {
            return "FALSE";
        }
    }
}