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The Dolphin Platform is a framework that implements the presentation model pattern and provides amodern way to create enterprise applications. The Platform provides several client implementations that all canbe used in combination with a general sever API.

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/*
 * Copyright 2015-2017 Canoo Engineering AG.
 *
 * 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.canoo.dp.impl.client.javafx;

import com.canoo.platform.remoting.client.javafx.BidirectionalConverter;
import com.canoo.platform.remoting.Property;
import org.apiguardian.api.API;

import static org.apiguardian.api.API.Status.INTERNAL;

@API(since = "0.x", status = INTERNAL)
public class DoubleDolphinBinder extends AbstractNumericDolphinBinder {

    private final static double EPSILON = 1e-10;

    public DoubleDolphinBinder(final Property property) {
        super(property);
    }

    @Override
    protected boolean equals(Number n, Double aDouble) {
        if(n == null && aDouble != null) {
            return false;
        }
        if(n != null && aDouble == null) {
            return false;
        }
        if(n == null && aDouble == null) {
            return true;
        }
        return Math.abs(n.doubleValue() - aDouble.doubleValue()) < EPSILON;
    }

    @Override
    protected BidirectionalConverter getConverter() {
        return new BidirectionalConverter() {
            @Override
            public Number convertBack(Double value) {
                if(value == null) {
                    return 0.0;
                }
                return value;
            }

            @Override
            public Double convert(Number value) {
                if(value == null) {
                    return 0.0;
                }
                return value.doubleValue();
            }
        };
    }

}