CompositeIdObject.java

package eu.f3rog.db;

import android.support.annotation.Nullable;

import com.j256.ormlite.field.DatabaseField;

/**
 * Class {@link CompositeIdObject}.
 *
 * @author Frantisek Gazo
 * @version 2015-09-09
 */
public abstract class CompositeIdObject {

    public static final class Comparator {

        public static boolean equals(CompositeIdObject cio1, CompositeIdObject cio2) {
            if (cio1 == null || cio2 == null || cio1.getDatabaseId() == null || cio2.getDatabaseId() == null)
                return false;
            return cio1.getDatabaseId().equals(cio2.getDatabaseId());
        }

    }

    public static final String COLUMN_DATABASE_ID = "database_id";

    @DatabaseField(id = true, useGetSet = true, persisterClass = CompositeIdFieldPersister.class, columnName = COLUMN_DATABASE_ID)
    private transient CompositeId databaseId;

    @Nullable
    public CompositeId getDatabaseId() {
        if (databaseId == null) {
            databaseId = composeDatabaseId();
        }
        return databaseId;
    }

    public void refreshDatabaseId() {
        databaseId = composeDatabaseId();
    }

    @Nullable
    public String getDatabaseIdPart(@CompositeId.Tag String idTag) {
        return (getDatabaseId() != null) ? getDatabaseId().getId(idTag) : null;
    }

    @Nullable
    public Long getDatabaseIdPartLong(@CompositeId.Tag String idTag) {
        return (getDatabaseId() != null) ? getDatabaseId().getLongId(idTag) : null;
    }

    @Nullable
    public String getDatabaseIdString() {
        return (getDatabaseId() != null) ? getDatabaseId().toString() : null;
    }

    public boolean hasDatabaseIdPart(@CompositeId.Tag String idTag) {
        return (getDatabaseId() != null) && getDatabaseId().containsIdFor(idTag);
    }

    public void setDatabaseId(CompositeId databaseId) {
        this.databaseId = databaseId;
    }

    public void setDatabaseIdString(String databaseIdString) {
        this.databaseId = CompositeId.Builder.buildFrom(databaseIdString);
    }

    protected abstract CompositeId composeDatabaseId();

}