de.dfki.asr.compass.model.AbstractCompassEntity.java Source code

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Here is the source code for de.dfki.asr.compass.model.AbstractCompassEntity.java

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/*
 * This file is part of COMPASS. It is subject to the license terms in
 * the LICENSE file found in the top-level directory of this distribution.
 * (Also available at http://www.apache.org/licenses/LICENSE-2.0.txt)
 * You may not use this file except in compliance with the License.
 */
package de.dfki.asr.compass.model;

import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import javax.xml.bind.annotation.XmlTransient;

@JsonIgnoreProperties(ignoreUnknown = true)
public abstract class AbstractCompassEntity {

    @XmlTransient
    public abstract long getId();

    public abstract void setId(long id);

    public abstract void clearIdsAfterDeepCopy();

    @XmlTransient
    @JsonIgnore
    public boolean isPersisted() {
        return this.getId() != 0;
    }

    public AbstractCompassEntity deepCopy() throws IOException, ClassNotFoundException {
        AbstractCompassEntity entity = null;
        forceEagerFetch();
        // Write the object out to a byte array
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        ObjectOutputStream out = new ObjectOutputStream(bos);
        out.writeObject(this);
        out.flush();
        out.close();

        // Make an input stream from the byte array and read
        // a copy of the object back in.
        ObjectInputStream in = new ObjectInputStream(new ByteArrayInputStream(bos.toByteArray()));
        entity = (AbstractCompassEntity) in.readObject();
        entity.clearIdsAfterDeepCopy();
        return entity;
    }

    public abstract void forceEagerFetch();
}