OafHelper.java

package eu.dnetlib.iis.wf.importer;

import java.util.Arrays;

import com.google.protobuf.InvalidProtocolBufferException;
import com.googlecode.protobuf.format.JsonFormat;
import com.googlecode.protobuf.format.JsonFormat.ParseException;

import eu.dnetlib.data.proto.OafProtos.Oaf;

/**
 * {@link Oaf} helper class.
 * 
 * @author mhorst
 *
 */
public final class OafHelper {

    // --------------------- CONSTRUCTORS --------------------------
    
    private OafHelper() {}

    // --------------------- LOGIC ---------------------------------
    
    /**
     * Builds {@link Oaf} object from byte array.
     * 
     * @param input byte array input
     * @return {@link Oaf} object built from byte array.
     * @throws InvalidProtocolBufferException
     */
    public static Oaf buildOaf(byte[] input) throws InvalidProtocolBufferException {
        Oaf.Builder oafBuilder = Oaf.newBuilder();
        oafBuilder.mergeFrom(input);
        return oafBuilder.build();
    }

    /**
     * Builds {@link Oaf} object from JSON representation.
     * 
     * @param input JSON representation of {@link Oaf} object
     * @throws ParseException
     */
    public static Oaf buildOaf(String input) throws ParseException {
        Oaf.Builder oafBuilder = Oaf.newBuilder();
        JsonFormat.merge(input, oafBuilder);
        return oafBuilder.build();
    }

    /**
     * Copies array or returns null when source is null.
     * 
     * @param source
     * @return copied array
     */
    final public static byte[] copyArrayWhenNotNull(byte[] source) {
        if (source != null) {
            return Arrays.copyOf(source, source.length);
        } else {
            return null;
        }
    }
}