
/*
 * Copyright 2015 Martijn van der Woud - The Crimson Cricket Internet Services
 *
 *    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.crimsoncricket.ddd.domain.model;

import com.crimsoncricket.ddd.port.adapter.hibernate.search.IdBridge;
import org.hibernate.search.annotations.DocumentId;
import org.hibernate.search.annotations.FieldBridge;

import javax.persistence.*;
import java.util.Objects;

@MappedSuperclass
public abstract class Entity<I extends Id> {

    @EmbeddedId
    @DocumentId
    @FieldBridge(impl = IdBridge.class)
    @AttributeOverrides({
        @AttributeOverride(name = "id", column = @Column(name = "id"))
    })
    private I id;

    @Version
    private Integer version;

    protected Entity(){};

    protected Entity(I id) {
        this.id = id;
    }


    public I id() {
        return id;
    }

    public Integer version() {
        return version;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (!(o instanceof Entity)) return false;
        Entity<?> entity = (Entity<?>) o;
        return Objects.equals(id, entity.id);
    }

    @Override
    public int hashCode() {
        return Objects.hash(id);
    }




}


/*
 * Copyright 2015 Martijn van der Woud - The Crimson Cricket Internet Services
 *
 *    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.crimsoncricket.ddd.domain.model;

import com.crimsoncricket.asserts.Assert;
import com.crimsoncricket.ddd.port.adapter.hibernate.search.IdBridge;
import org.hibernate.search.annotations.DocumentId;
import org.hibernate.search.annotations.FieldBridge;

import javax.persistence.*;
import java.util.Objects;

import static com.crimsoncricket.asserts.Assert.assertArgumentNotNull;

@MappedSuperclass
public abstract class Entity<I extends Id> {

    @EmbeddedId
    @DocumentId
    @FieldBridge(impl = IdBridge.class)
    @AttributeOverrides({
        @AttributeOverride(name = "id", column = @Column(name = "id"))
    })
    private I id;

    @Version
    private Integer version;

    protected Entity(){};

    protected Entity(I id) {
        assertArgumentNotNull(id, "Id may not be null");
        this.id = id;
    }


    public I id() {
        return id;
    }

    public Integer version() {
        return version;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (!(o instanceof Entity)) return false;
        Entity<?> entity = (Entity<?>) o;
        return Objects.equals(id, entity.id);
    }

    @Override
    public int hashCode() {
        return Objects.hash(id);
    }




}

Add assertion: entity id may not be null.