nu.yona.server.rest.PolymorphicDto.java Source code

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Here is the source code for nu.yona.server.rest.PolymorphicDto.java

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/*******************************************************************************
 * Copyright (c) 2016 Stichting Yona Foundation This Source Code Form is subject to the terms of the Mozilla Public License, v.
 * 2.0. If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
 *******************************************************************************/
package nu.yona.server.rest;

import org.springframework.hateoas.ResourceSupport;

import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.annotation.JsonTypeInfo;

/*
 * Class to extend from when a DTO is polymorphic. Do not forget to add an @JsonSubTypes annotation.
 */
@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "@type")
public abstract class PolymorphicDto extends ResourceSupport {
    /*
     * Used to serialize the type. The default way with @JsonTypeInfo did not work.
     */
    @JsonProperty(value = "@type")
    public abstract String getType();

    /*
     * Revert to default equals implementation.
     * @see org.springframework.hateoas.ResourceSupport#equals(java.lang.Object)
     */
    @Override
    public boolean equals(Object obj) {
        return this == obj;
    }

    /*
     * Revert to default hash code implementation.
     * @see org.springframework.hateoas.ResourceSupport#hashCode()
     */
    @Override
    public int hashCode() {
        return System.identityHashCode(this);
    }
}